0000066570-26-000005 | 10-K | XBRL Viewer

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Capital Stock - Schedule of Common Stock Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Common Stock Activity [Roll Forward]
Beginning balance (in shares)	39,260,080
Beginning balance, Treasury (in shares)	(22,821,311)
Stock options exercised (in shares)	12,776	10,666	31,394
Ending balance (in shares)	38,912,629	39,260,080
Ending balance, Treasury (in shares)	(23,168,762)	(22,821,311)
Common stock
Common Stock Activity [Roll Forward]
Purchase of treasury shares (in shares)		166,292	0
Common stock
Common Stock Activity [Roll Forward]
Beginning balance (in shares)	62,081,391	62,081,391	62,081,391
Beginning balance	$ 329,953	$ 312,324	$ 281,980
Ending balance (in shares)	62,081,391	62,081,391	62,081,391
Ending balance	$ 343,842	$ 329,953	$ 312,324
Treasury Stock, Common
Common Stock Activity [Roll Forward]
Beginning balance, Treasury (in shares)	(22,821,311)	(22,764,179)	(22,868,327)
Beginning balance	$ (396,604)	$ (361,684)	$ (359,838)
Ending balance, Treasury (in shares)	(23,168,762)	(22,821,311)	(22,764,179)
Ending balance	$ (483,248)	$ (396,604)	$ (361,684)
Restricted Stock \| Common stock
Common Stock Activity [Roll Forward]
Restricted stock awards	(1,288)	(842)	(643)
Restricted stock expense	12,202	15,769	9,476
Restricted stock forfeitures	$ (2,223)	$ (4,530)	$ (1,414)
Restricted Stock \| Treasury Stock, Common
Common Stock Activity [Roll Forward]
Restricted stock awards (in shares)	69,691	52,098	40,856
Restricted stock awards	$ 1,288	$ 842	$ 643
Stock options \| Common stock
Common Stock Activity [Roll Forward]
Restricted stock expense		41	11
Restricted stock forfeitures	(1)	(41)	(11)
Stock options exercised	$ 334	$ 327	$ 970
Stock options \| Treasury Stock, Common
Common Stock Activity [Roll Forward]
Stock options exercised (in shares)	12,776	10,666	31,394
Stock options exercised	$ 235	$ 174	$ 503
Performance stock \| Common stock
Common Stock Activity [Roll Forward]
Restricted stock expense	8,041	8,394	23,546
Restricted stock forfeitures	(3,179)	(1,634)	(1,585)
Performance stock issued	$ (2,109)	$ (1,256)	$ (855)
Performance stock \| Treasury Stock, Common
Common Stock Activity [Roll Forward]
Performance stock issued (in shares)	118,605	77,544	53,407
Performance stock issued	$ 2,109	$ 1,256	$ 855
Employee Stock Purchase Plan \| Common stock
Common Stock Activity [Roll Forward]
Employee stock purchase plan shares issued	$ 1,756	$ 1,215	$ 849
Employee Stock Purchase Plan \| Treasury Stock, Common
Common Stock Activity [Roll Forward]
Employee stock purchase plan (in shares)	15,278	8,871	7,140
Employee stock purchase plan shares issued	$ 286	$ 148	$ 114
Treasury shares purchased \| Treasury Stock, Common
Common Stock Activity [Roll Forward]
Purchase of treasury shares (in shares)	62,381	40,019	28,649
Treasury shares purchased	$ (10,570)	$ (7,408)	$ (3,961)
Share repurchase program \| Common stock
Common Stock Activity [Roll Forward]
Employee stock purchase plan expense	356	186
Share Repurchase Program \| Treasury Stock, Common
Common Stock Activity [Roll Forward]
Restricted stock expense	$ (79,992)	$ (29,932)
Purchase of treasury shares (in shares)	501,420	(166,292)

Derivative Financial Instruments

12 Months Ended

Dec. 31, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

As part of our currency exchange rate risk management strategy, we enter into certain derivative foreign currency forward contracts that do not meet the U.S. GAAP criteria for hedge accounting but have the impact of partially offsetting certain foreign currency exposures. We account for these forward contracts at fair value and report the related gains or losses in currency exchange losses, net, in the Consolidated Statements of Income. At December 31, 2025, the notional amount of open foreign currency exchange forward contracts not designated as hedging instruments was $113.4 million and there were no unrealized gains/losses on these contracts. All open foreign currency exchange forward contracts not designated as hedging instruments will mature during the first quarter of 2026.

We also use derivative foreign currency forward contracts to manage exposure to foreign exchange currency risks arising from forecasted transactions. These instruments meet the U.S. GAAP criteria for hedge accounting and are accounted for under ASC 815, Derivatives and Hedging. For hedges of forecasted transactions, significant characteristics and expected terms of a forecasted transaction are specifically identified, and it is probable that each forecasted transaction will occur. If it is deemed probable the forecasted transaction will not occur, then the gain or loss would be recognized immediately into net income. At December 31, 2025, the notional amount of open foreign currency exchange forward contracts designated as cash flow hedges was $31.6 million. See Note 7—Reclassifications Out of Accumulated Other Comprehensive Loss for information on unrealized loss deferred in Accumulated other comprehensive loss until the transactions related to these cash flow hedges affect earnings. Fair values of these contracts are derived using quoted forward foreign exchange prices to interpolate values of outstanding trades at the reporting date based on their maturities. All open foreign currency exchange forward contracts designated as cash flow hedges outstanding at will mature by December 2026.

The following table presents the Consolidated Balance Sheets location and fair value of assets and liabilities associated with derivative financial instruments:


	December 31,
(In thousands)	2025		2024
Derivatives not designated as hedging instruments:
Foreign exchange contracts: prepaid expenses and other current assets	$	—	$	175
Foreign exchange contracts: other current liabilities	$	392	$	1,111

Derivatives designated as cash flow hedges:
Foreign exchange contracts: prepaid expenses and other current assets	$	105	$	—
Foreign exchange contracts: other current liabilities	$	320	$	—

The following table presents the amount and classification of the (gains) losses associated with derivative financial instruments within the Consolidated Statements of Income and Consolidated Statements of Cash Flows:


	Year ended December 31,
	2025		2024
Derivatives not designated as hedging instruments:
Foreign exchange contracts: currency exchange losses, net	$	(4,370)	$	9,139

As of December 31, 2025, we expect approximately $0.2 million of net losses currently in Accumulated other comprehensive loss to be reclassified into net income within the next 12 months as forecasted transactions occur.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

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+ Details

Revenue Recognition	12 Months Ended
Revenue Recognition	Dec. 31, 2025
Revenue Recognition and Deferred Revenue [Abstract]
Revenue Recognition	Revenue Recognition We generate revenue primarily from manufacturing and selling a comprehensive line of safety products and solutions to protect the health and safety of workers and facility infrastructures around the world. Our customers generally fall into two categories: distributors and end-users. All customer categories have similar nature, timing and uncertainty related to cash flows. As a result, the underlying principles of revenue recognition are identical for both categories of customers. We account for revenue in accordance with ASC 606, Revenue from Contracts with Customers. Revenue from the sale of products and solutions is recognized when there is persuasive evidence of an arrangement and control passes to the customer, which generally occurs either when product is shipped to the customer or, in the case of certain customers, when product is delivered to the customer's site. We establish our shipping terms according to local practice and market characteristics. We do not ship product unless we have an order or other documentation authorizing shipment to our customers. Our payment terms vary by the type and location of our customer and the products and solutions offered; however, in most cases, the term between invoicing and when payment is due is not significant. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Amounts billed and due from our customers are classified as receivables on the Consolidated Balance Sheets. We make appropriate provisions for credit losses, which have historically been insignificant in relation to our net sales. Certain contracts with customers may have an element of variable consideration that is estimated when revenue is recognized under the contract. Variable consideration could include volume incentive rebates and performance guarantees. Rebates are based on achieving a certain level of purchases and other performance criteria that are documented in established distributor programs. These rebates are estimated based on projected sales to the customer and accrued as a reduction of net sales as they are earned by the customer. Sales, value added and other taxes collected with revenue-producing activities and remitted to governmental authorities are excluded from revenue. Depending on the terms of the arrangement, we may defer revenue for which we have a future obligation, which may include leases where the Company is the lessor, training, extended warranty, software subscriptions, maintenance and technical services, until such time that the obligation has been satisfied. We use an observable price, or a cost plus margin approach when one is not available, to determine the stand-alone selling price for separate performance obligations. We have elected to recognize the cost for shipping and handling as an expense when control of the product has passed to the customer. These costs are included within the Cost of products sold line on the Consolidated Statements of Income. Amounts billed to customers for shipping and handling are included within the Net sales line on the Consolidated Statements of Income. Performance Obligations The Company recognizes revenue when performance obligations identified under the terms of the contract with its customers are satisfied, which generally occurs upon the transfer of control in accordance with the contractual terms and conditions of sale. For most contracts with customers, this results in point-in-time revenue recognition once contractual shipping terms are fulfilled. Disaggregation of Revenue Refer to Note 9—Segment Information to the consolidated financial statements in Part II Item 8 of this Form 10-K for disaggregation of revenue by segment and product category, as we believe this best depicts how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Lessor Arrangements The Company derives a portion of its revenue from various leasing contracts where the Company is the lessor, primarily managed fire service contracts. Such arrangements provide for recurring payments throughout the contract term. These payments cover equipment provided in addition to several services which include maintenance and interest. Managed fire service contracts meet the criteria to be accounted for as sales-type leases. Under ASC 842, Leases, these contracts contain both lease and non-lease components. For a component to be separate, the customer would be able to benefit from the right of use of the component separately or with other resources readily available to the customer and the right of the use is not highly dependent or highly interrelated with the other rights to use the other underlying assets or components. For managed fire service contracts, revenue from equipment provided is considered a lease component and recognized with point in time revenue recognition upon lease commencement. Upon the recognition of such revenue, an asset is established for the investment in sales-type leases. Maintenance revenue, which is considered a non-lease component, and interest are recognized monthly over the lease term. As of December 31, 2025, remaining maintenance performance obligations for managed fire service contracts were $29.3 million, which are expected to be recognized to revenue over the remaining contract lives which are primarily less than 3 years. Lease revenues and interest earned by the Company, included in the Consolidated Statements of Income, were not material to any of the years ended December 31, 2025, 2024 and 2023. Net investment in sales-type leases of $5.7 million and $7.5 million were included in Prepaid expenses and other current assets and Other noncurrent assets, respectively, in the Consolidated Balance Sheets as of December 31, 2025. These amounts at December 31, 2025, are expected to be collected over the remaining life of each contract. Practical Expedients and Exemptions We do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed. We do not assess whether a contract has a significant financing component if the expectation at contract inception is such that the period between payment by the customer and the transfer of the promised goods or services to the customer will be one year or less. We generally expense sales commissions when incurred because the amortization period would have been one year or less. These costs are recorded within selling, general and administrative expenses in our Consolidated Statements of Income.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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+ Details

Restructuring Charges - Roll Forward (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 3,400	$ 9,800	$ 15,000
Restructuring charges	3,897	6,397	9,892
Currency translation and other adjustments	400	(400)	0
Cash payments / utilization	(4,400)	(12,400)	(15,100)
Restructuring reserve, ending balance	3,300	3,400	9,800
Corporate
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0	0	500
Restructuring charges	1,000	1,300	2,100
Currency translation and other adjustments	0	0	0
Cash payments / utilization	(1,000)	(1,300)	(2,600)
Restructuring reserve, ending balance	0	0	0
Americas
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	200	800	1,700
Restructuring charges	1,200	1,600	3,100
Currency translation and other adjustments	0	(100)	(100)
Cash payments / utilization	(600)	(2,100)	(3,900)
Restructuring reserve, ending balance	800	200	800
International segment
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	3,200	9,000	12,800
Restructuring charges	1,700	3,500	4,700
Currency translation and other adjustments	400	(300)	100
Cash payments / utilization	(2,800)	(9,000)	(8,600)
Restructuring reserve, ending balance	$ 2,500	$ 3,200	$ 9,000

Cover - USD ($) $ in Billions	12 Months Ended
Cover - USD ($) $ in Billions	Dec. 31, 2025	Feb. 06, 2026	Jun. 30, 2025
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-15579
Entity Registrant Name	MSA SAFETY INCORPORATED
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	46-4914539
Entity Address, Address Line One	1000 Cranberry Woods Drive
Entity Address, City or Town	Cranberry Township,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	16066-5207
City Area Code	724
Local Phone Number	776-8600
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	MSA
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 6.5
Entity Common Stock, Shares Outstanding (in shares)		38,774,722
Documents Incorporated by Reference	Portions of the Proxy Statement for the May 8, 2026, Annual Meeting of Shareholders are incorporated by reference into Part III.
Entity Central Index Key	0000066570
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Amendment Flag	false

Goodwill and Intangible Assets - Schedule of Changes in Intangible Assets, Net of Accumulated Amortization (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Finite-lived Intangible Assets [Roll Forward]
Net balance at January 1	$ 246,437	$ 266,134
Additions (Note 15)	66,568	0
Amortization expense	(20,658)	(17,826)
Currency translation	6,780	(1,871)
Net balance at December 31	$ 299,127	$ 246,437

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

+ References

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-Name Accounting Standards Codification
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-Paragraph 2
-Subparagraph (a)(2)
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-Section 50
-Paragraph 6
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-6

+ Details

Capital Stock (Tables)

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Common Stock Activity

Common stock activity is summarized as follows:


	Shares		Dollars
(Dollars in thousands)	Issued	Treasury	Common Stock		Treasury Cost(a)
Balance at January 1, 2023	62,081,391	(22,868,327)	$	281,980	$	(359,838)
Restricted stock awards	—	40,856	(643)		643
Restricted stock expense	—	—	9,476		—
Restricted stock forfeitures	—	—	(1,414)		—
Stock options exercised	—	31,394	970		503
Stock option expense	—	—	11		—
Stock option forfeitures	—	—	(11)		—
Performance stock issued	—	53,407	(855)		855
Performance stock expense	—	—	23,546		—
Performance stock forfeitures	—	—	(1,585)		—

Employee stock purchase plan shares issued	—	7,140	849		114

Treasury shares purchased	—	(28,649)	—		(3,961)


Balances December 31, 2023	62,081,391	(22,764,179)	$	312,324	$	(361,684)
Restricted stock awards	—	52,098	(842)		842
Restricted stock expense	—	—	15,769		—
Restricted stock forfeitures	—	—	(4,530)		—
Stock options exercised	—	10,666	327		174
Stock option expense	—	—	41		—
Stock option forfeitures	—	—	(41)		—
Performance stock issued	—	77,544	(1,256)		1,256
Performance stock expense	—	—	8,394		—
Performance stock forfeitures	—	—	(1,634)		—
Employee stock purchase expense	—	—	186		—
Employee stock purchase plan shares issued	—	8,871	1,215		148
Treasury shares purchased	—	(40,019)	—		(7,408)
Share repurchase program	—	(166,292)	—		(29,932)
Balances December 31, 2024	62,081,391	(22,821,311)	$	329,953	$	(396,604)
Restricted stock awards	—	69,691	(1,288)		1,288
Restricted stock expense	—	—	12,202		—
Restricted stock forfeitures	—	—	(2,223)		—
Stock options exercised	—	12,776	334		235

Stock option forfeitures	—	—	(1)		—
Performance stock issued	—	118,605	(2,109)		2,109
Performance stock expense	—	—	8,041		—
Performance stock forfeitures	—	—	(3,179)		—

Employee stock purchase plan shares issued	—	15,278	1,756		286
Employee stock purchase plan expense	—	—	356		—
Treasury shares purchased	—	(62,381)	—		(10,570)
Share repurchase program	—	(501,420)	—		(79,992)
Balances December 31, 2025	62,081,391	(23,168,762)	$	343,842	$	(483,248)
(a)Excludes treasury cost related to preferred stock.

Restructuring Charges - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges (Note 4)	$ 3,897	$ 6,397	$ 9,892
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges (Note 4)		1,300	2,100
Employee severance \| Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges (Note 4)	1,000
Employee severance \| Americas
Restructuring Cost and Reserve [Line Items]
Restructuring charges (Note 4)	1,200	1,600	3,100
Employee severance \| International segment
Restructuring Cost and Reserve [Line Items]
Restructuring charges (Note 4)	$ 1,700	$ 3,500	$ 4,700

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References + Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Stock Plans - Summary of Performance Stock Unit Activity (Detail) - Performance stock - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Shares
Beginning balance (in shares)	161,996	189,221	178,760
Granted (in shares)	63,964	40,787	77,654
Vested (in shares)	(118,605)	(77,544)	(53,407)
Performance adjustments (in shares)	64,457	20,488	(3,009)
Forfeited (in shares)	(20,260)	(10,956)	(10,777)
Ending balance (in shares)	151,552	161,996	189,221
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 146.50	$ 146.17	$ 146.28
Granted (in dollars per share)	162.61	177.34	132.39
Vested (in dollars per share)	143.47	174.13	127.36
Performance adjustments (in dollars per share)	143.49	194.10	127.40
Forfeited (in dollars per share)	156.89	149.16	147.06
Ending balance (in dollars per share)	$ 153.00	$ 146.50	$ 146.17

Segment Information - Additional Information (Detail) - Segment	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Segment Reporting [Abstract]
Number of geographic operating segments (in segments)		4
Number of reportable segments (in segments)	2

Reclassifications Out of Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Reclassification Out of Accumulated Other Comprehensive Loss


	MSA Safety Incorporated
(In thousands)	2025		2024		2023
Pension and other post-retirement benefits(a)
Balance at beginning of period	$	(11,390)	$	(42,652)	$	(50,335)
Unrecognized net actuarial gains	40,868		39,049		8,654

Tax expense	(10,095)		(9,579)		(1,514)
Total other comprehensive gain before reclassifications, net of tax	30,773		29,470		7,140
Amounts reclassified from accumulated other comprehensive loss into net income:
Amortization of prior service cost (credit) (Note 16)	650		(42)		(84)
Recognized net actuarial losses (Note 16)	1,759		2,482		812
Tax benefit	(608)		(648)		(185)
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	1,801		1,792		543

Total other comprehensive income	$	32,574	$	31,262	$	7,683
Balance at end of period	$	21,184	$	(11,390)	$	(42,652)
Foreign currency forward cash flow hedges
Balance at beginning of period	$	—	$	—	$	—
Unrealized losses on cash flow hedges (Note 19)	(215)		—		—

Balance at end of period	$	(215)	$	—	$	—
Available-for-sale securities
Balance at beginning of period	$	—	$	—	$	(2)
Unrealized gains on available-for-sale securities (Note 20)	—		—		2
Balance at end of period	$	—	$	—	$	—
Foreign currency translation
Balance at beginning of period	$	(130,259)	$	(86,597)	$	(108,380)
Reclassification of currency translation from accumulated other comprehensive loss into net income(b)	(764)		(1,200)		101

Foreign currency translation adjustments	68,273		(42,462)		21,682
Balance at end of period	$	(62,750)	$	(130,259)	$	(86,597)
(a)Reclassifications out of accumulated other comprehensive loss (AOCL) and into net income are included in the computation of net periodic pension and other post-retirement benefit costs (refer to Note 16—Pensions and Other Post-retirement Benefits). (b)Reclassifications out of AOCL and into net income relate primarily to the recognition of non-cash net cumulative translation (gains)/losses associated with certain foreign subsidiaries. The reclassifications are included in Currency exchange losses, net, within the Consolidated Statements of Income.

Leases - Future Lease Payments (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Leases [Abstract]
2022	$ 15,200
2023	11,900
2024	9,300
2025	7,000
2026	4,500
After 2030	21,400
Lease Liability	69,300
Less: Imputed interest	9,900
Present value of operating lease liabilities	$ 59,400
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities
Less: Current portion operating lease liabilities	$ 13,200
Noncurrent operating lease liabilities (Note 18)	$ 46,151	$ 45,984

Segment Information - Reconciliation of Total Adjusted Operating Income to Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting [Abstract]
Adjusted operating income		$ 464,657	$ 449,316
Corporate Expenses	$ 43,412	50,385	51,600
Restructuring charges	3,897	6,397	9,892
Currency exchange losses, net	15,801	3,638	17,079
Interest expense	31,799	36,889	46,733
Other income, net (Note 17)	(26,379)	(22,718)	(22,101)
Acquisition-related amortization	12,615	9,174	9,246
Transaction costs	10,467	886	965
Net cost for product-related legal matter	0	5,000	0
Loss on divestiture of MSA LLC (Note 21)	0	0	129,211
Product liability expense (Note 21)	0	0	3
Income before income taxes	$ 366,398	$ 375,006	$ 206,688

Schedule II - Valuation and Qualifying Accounts - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for doubtful accounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Currency translation gains (losses)	$ 239	$ 1,408	$ 1,368
Income tax valuation allowance
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Currency translation gains (losses)	$ 156	$ 218	$ 16

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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+ Details

Restructuring Charges

12 Months Ended

Dec. 31, 2025

Restructuring and Related Activities [Abstract]

Restructuring Charges

During the years ended December 31, 2025, 2024 and 2023, we recorded restructuring charges of $3.9 million, $6.4 million and $9.9 million, respectively. These charges were primarily related to our ongoing initiatives to adjust our cost structure, improve productivity, and right-size the organization in response to macroeconomic conditions.

Americas segment restructuring charges of $1.2 million during the year ended December 31, 2025, were to right-size the organization in response to macroeconomic conditions. International segment restructuring charges of $1.7 million during the year ended December 31, 2025, were related to ongoing initiatives to optimize our manufacturing footprint and right-size the organization in response to macroeconomic conditions. Corporate related restructuring charges of $1.0 million during the year ended December 31, 2025, were to right-size the organization in response to macroeconomic conditions.

Americas segment restructuring charges of $1.6 million during the year ended December 31, 2024, were related to manufacturing footprint optimization activities. International segment restructuring charges of $3.5 million during the year ended December 31, 2024, were related to ongoing initiatives to optimize our manufacturing footprint and improve productivity as well as management restructuring. Corporate related restructuring charges of $1.3 million during the year ended December 31, 2024, were related to management restructuring.

Americas segment restructuring charges of $3.1 million during the year ended December 31, 2023, were related to manufacturing footprint optimization activities. International segment restructuring charges of $4.7 million during the year ended December 31, 2023, were related to ongoing initiatives to drive profitable growth and improve productivity. Corporate related restructuring charges of $2.1 million during the year ended December 31, 2023, were related to footprint optimization activities and management restructuring.

Activity and reserve balances for restructuring charges were as follows:


(in millions)	Americas segment		International segment		Corporate		Total
Reserve balances at January 1, 2023	$	1.7	$	12.8	$	0.5	$	15.0
Restructuring charges	3.1		4.7		2.1		9.9
Currency translation and other adjustments	(0.1)		0.1		—		—
Cash payments / utilization	(3.9)		(8.6)		(2.6)		(15.1)
Reserve balances at December 31, 2023	$	0.8	$	9.0	$	—	$	9.8
Restructuring charges	1.6		3.5		1.3		6.4
Currency translation and other adjustments	(0.1)		(0.3)		—		(0.4)
Cash payments / utilization	(2.1)		(9.0)		(1.3)		(12.4)
Reserve balances at December 31, 2024	$	0.2	$	3.2	$	—	$	3.4
Restructuring charges	1.2		1.7		1.0		3.9
Currency translation and other adjustments	—		0.4		—		0.4
Cash payments / utilization	(0.6)		(2.8)		(1.0)		(4.4)
Reserve balances at December 31, 2025	$	0.8	$	2.5	$	—	$	3.3

Restructuring reserves at December 31, 2025 and 2024 are included in Other current liabilities in our Consolidated Balance Sheets.

Income Taxes - Components of Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
U.S. income	$ 242,979	$ 243,129	$ 80,229
Non-U.S. income	123,419	131,877	126,459
Income before income taxes	366,398	375,006	206,688
Current
Federal	46,980	47,060	49,642
State	9,981	12,868	9,510
Non-U.S.	35,475	30,209	27,101
Total current provision	92,436	90,137	86,253
Deferred
Federal	2,666	(3,141)	54,272
State	(1,503)	1,046	12,914
Non-U.S.	(6,125)	1,997	(5,334)
Total deferred provision (benefit)	(4,962)	(98)	61,852
Provision for income taxes	$ 87,474	$ 90,039	$ 148,105

Reclassifications Out of Accumulated Other Comprehensive Loss

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Reclassifications Out of Accumulated Other Comprehensive Loss


	MSA Safety Incorporated
(In thousands)	2025		2024		2023
Pension and other post-retirement benefits(a)
Balance at beginning of period	$	(11,390)	$	(42,652)	$	(50,335)
Unrecognized net actuarial gains	40,868		39,049		8,654

Tax expense	(10,095)		(9,579)		(1,514)
Total other comprehensive gain before reclassifications, net of tax	30,773		29,470		7,140
Amounts reclassified from accumulated other comprehensive loss into net income:
Amortization of prior service cost (credit) (Note 16)	650		(42)		(84)
Recognized net actuarial losses (Note 16)	1,759		2,482		812
Tax benefit	(608)		(648)		(185)
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	1,801		1,792		543

Total other comprehensive income	$	32,574	$	31,262	$	7,683
Balance at end of period	$	21,184	$	(11,390)	$	(42,652)
Foreign currency forward cash flow hedges
Balance at beginning of period	$	—	$	—	$	—
Unrealized losses on cash flow hedges (Note 19)	(215)		—		—

Balance at end of period	$	(215)	$	—	$	—
Available-for-sale securities
Balance at beginning of period	$	—	$	—	$	(2)
Unrealized gains on available-for-sale securities (Note 20)	—		—		2
Balance at end of period	$	—	$	—	$	—
Foreign currency translation
Balance at beginning of period	$	(130,259)	$	(86,597)	$	(108,380)
Reclassification of currency translation from accumulated other comprehensive loss into net income(b)	(764)		(1,200)		101

Foreign currency translation adjustments	68,273		(42,462)		21,682
Balance at end of period	$	(62,750)	$	(130,259)	$	(86,597)
(a)Reclassifications out of accumulated other comprehensive loss (AOCL) and into net income are included in the computation of net periodic pension and other post-retirement benefit costs (refer to Note 16—Pensions and Other Post-retirement Benefits). (b)Reclassifications out of AOCL and into net income relate primarily to the recognition of non-cash net cumulative translation (gains)/losses associated with certain foreign subsidiaries. The reclassifications are included in Currency exchange losses, net, within the Consolidated Statements of Income.

Significant Accounting Policies	12 Months Ended
Significant Accounting Policies	Dec. 31, 2025
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies General Information and Basis of Presentation—The consolidated financial statements of MSA Safety Incorporated ("MSA" or "the Company") are prepared in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP") and require management to make certain judgments, estimates, and assumptions. These may affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements. They also may affect the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates upon subsequent resolution of identified matters. Principles of Consolidation—The consolidated financial statements include the accounts of the Company and all subsidiaries. Intercompany accounts and transactions are eliminated. Reclassifications—Certain reclassifications of prior years' results have been made to conform to the current year presentation. These reclassifications relate to aligning prior year Other income, net, and Segment Information disclosures with current year presentation. Currency Translation—The functional currency of all significant non-U.S. operating subsidiaries is the local country currency. Assets and liabilities of these operations are translated at year-end exchange rates. Income statement accounts are translated using the average exchange rates for the reporting period. Translation adjustments for these subsidiaries are reported as a component of shareholders’ equity and are not included in net income. Foreign currency transaction gains and losses are included in net income for the reporting period. Cash Equivalents—Cash equivalents include temporary deposits with financial institutions and highly liquid investments with original maturities of 90 days or less. Restricted Cash—Restricted cash, which is designated for use other than current operations, is included in prepaid expenses and other current assets in the Consolidated Balance Sheets. Restricted cash balances were $0.9 million and $0.5 million at December 31, 2025 and 2024, respectively. These balances were used to support letter of credit balances. Inventories—Inventories are stated at the lower of cost or net realizable value. Cost is determined using the first-in, first-out ("FIFO") method. It is the Company's general policy to write-down any inventory balance in excess of the last 24 months of consumption and any inventory identified as obsolete. Property and Depreciation—Property is recorded at cost. Depreciation is computed primarily using the straight-line method over the estimated useful lives of the assets, generally as follows: buildings 20 to 40 years, and machinery and equipment 3 to 10 years. Expenditures for significant renewals and improvements are capitalized. Ordinary repairs and maintenance are expensed as incurred. Gains or losses on property dispositions are included in other expense (income), net and the cost and related accumulated depreciation are removed from the accounts. Depreciation expense for the years ended December 31, 2025, 2024 and 2023 was $49.7 million, $45.6 million and $41.8 million, respectively. Properties, plant, and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets or asset groups may not be recoverable. Software Development Costs—Software development costs are costs incurred to create, enhance and deploy the Company’s broad range of wireless technology and cloud-based computing safety services. Software development costs, other than software development costs qualifying for capitalization, are expensed as incurred. Costs of computer software developed or obtained for internal use that are incurred in the preliminary project and post implementation stages are expensed as incurred. Certain costs incurred during the application and development stage, which primarily include compensation and related expenses, are capitalized. Additionally, costs of upgrades and enhancements are capitalized when it is probable that the upgrades and enhancements will result in added functionality. During 2025, 2024 and 2023, respectively, there was $14.9 million, $13.0 million and $12.1 million of software development costs capitalized. The Company has unamortized computer software development costs of $22.9 million and $19.9 million as of December 31, 2025 and 2024, respectively, included in property, plant and equipment, net. Capitalized costs are amortized through cost of products sold using the straight-line method over the estimated useful life, which is normally three years, beginning in the period in which the software is ready for its intended use or when the upgrade or enhancement is deployed. Software development amortization expense was $12.0 million, $11.3 million and $10.4 million during the years ended December 31, 2025, 2024 and 2023, respectively. Lessee Arrangements—At the inception of our contracts, we determine if the contract is or contains a lease. A contract is or contains a lease if it conveys the right to control the use of an identified asset for a period of time in exchange for consideration. We have elected to not separate the lease and non-lease components within our lease contracts. Right-of-use assets and operating lease liabilities are recognized based on the present value of lease payments over the lease term at commencement. We use our incremental borrowing rate ("IBR") at the recognition date in determining the present value of future payments for leases that do not have a readily determinable implicit rate. Our IBR reflects a fully secured rate based on our credit rating, taking into consideration the repayment timing of the lease and any impacts due to the economic environment in which the lease operates. Our lease payments are largely fixed. Variable lease payments that depend on an index or a rate are included in the lease payments and are measured using the prevailing index or rate at the measurement date, with differences between the calculated lease payment and the actual lease payment being expensed in the period of the change. Other variable lease payments, including utilities, consumption and common area maintenance as well as repairs, maintenance and mileage overages on vehicles, are expensed during the period incurred. A majority of our real estate leases include options to extend the lease and options to early terminate the lease. Leases with an early termination option generally involve a termination payment. If we are reasonably certain to exercise an option to extend a lease, the extension period is included as part of the right-of-use asset and the lease liability. Some of our leases contain residual value guarantees. These are guarantees made to the lessor that the value of an underlying asset returned to the lessor at the end of a lease will be at least a specified amount. Our leases do not contain restrictions or covenants that restrict us from incurring other financial obligations. For our leases, we have elected to not apply the recognition requirements to leases of less than twelve months. These leases are expensed on a straight-line basis and are not included within the Company's operating lease asset or liability. Lease right-of-use assets and liabilities are recognized based on the present value of the fixed future lease payments over the lease term. Operating leases are included in Operating lease right-of-use assets, net, Other current liabilities, and Noncurrent operating lease liabilities in our Consolidated Balance Sheets. Finance leases are included in Property, plant and equipment, net, Other current liabilities, and Other noncurrent liabilities in our Consolidated Balance Sheets. Lease expense for all operating leases is classified in Cost of products sold or Selling, general and administrative expense in the Consolidated Statements of Income. For finance leases, the amortization of the right-of-use asset is included in depreciation and amortization, and the interest is included in interest expense. Lessor Arrangements—The Company derives a portion of its revenue from various leasing arrangements where the Company is the lessor, primarily managed fire service contracts. Such arrangements provide for payments covering equipment provided, maintenance and interest. These arrangements meet the criteria to be accounted for as sales-type leases under ASC 842 and contain both lease and non-lease components. For a component to be separate, the customer would be able to benefit from the right of use of the component separately or with other resources readily available to the customer and the right of the use is not highly dependent or highly interrelated with the other rights to use the other underlying assets or components. Revenue from equipment provided is considered a lease component and recognized with point in time revenue recognition upon lease commencement. Upon the recognition of such revenue, an asset is established for the investment in sales-type leases. Maintenance revenue, which is considered a non-lease component, and interest is recognized over the lease term. Goodwill and Other Intangible Assets—Intangible assets with a finite useful life are amortized on a straight-line basis over their useful lives. Indefinite lived intangible assets are assessed for possible impairment annually on October 1st or whenever circumstances change such that the recorded value of the asset may not be recoverable. We performed a quantitative assessment of the indefinite lived trade name intangible asset as outlined in ASC 350 by comparing the estimated fair value of the trade name intangible asset to its carrying value. We estimate the fair value using the relief from royalty income approach. A number of assumptions and estimates are involved in the application of the relief from royalty model, including sales volumes and prices, royalty rates and tax rates. Forecasts are based on sales generated by the underlying trade name assets and are generally based on approved business unit operating plans for the early years and historical relationships in later years. Based on these assessments, no impairments were identified during the years ended December 31, 2025, 2024 or 2023. All goodwill is assigned to and evaluated for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment. Goodwill is not amortized, but evaluated for impairment at least annually or whenever events or changes in circumstance indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company may perform either a qualitative assessment of potential impairment or proceed directly to a quantitative assessment of potential impairment. If the Company chooses not to perform a qualitative assessment, or if it chooses to perform a qualitative assessment but is unable to qualitatively conclude that no impairment has occurred, then the Company will perform a quantitative assessment. A quantitative test for goodwill impairment is performed by determining the fair value of the related reporting units. The Company estimates the fair value of the reporting unit with which the goodwill is associated and compares it to the carrying value. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge is recognized for the excess of the reporting unit's carrying value over its fair value. In 2025, we performed a quantitative test at October 1, 2025. We estimate fair value of each reporting unit using a combination of valuation techniques, including the discounted cash flow ("DCF") method, a form of the income approach, and the guideline public company method, a form of the market approach, as we believe each are important indicators of fair value. A number of assumptions and estimates are involved in the application of the DCF model, such as discount rates, revenue growth rates, and operating margins which are affected by expectations about future market or economic conditions. Cash flow forecasts are generally based on approved reporting unit operating plans for the early years and historical relationships in later years. The market approach methodology measures value through an analysis of peer companies. The analysis entails measuring the multiples of earnings before interest, taxes, depreciation and amortization ("EBITDA") at which peer companies are trading. Management performed its evaluation and determined the fair value of each reporting unit is greater than the carrying amount and, accordingly, no impairment of our goodwill has been recorded during the years ended December 31, 2025, 2024 or 2023. Revenue Recognition—We account for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers. Revenue from the sale of products and solutions is recognized when there is persuasive evidence of an arrangement and control passes to the customer. We establish our shipping terms according to local practice and market characteristics. We do not ship product unless we have an order or other documentation authorizing shipment to our customers. Our payment terms vary by the type and location of our customer and the products and solutions offered. The term between invoicing and when payment is due is not significant. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Amounts billed and due from our customers are classified as receivables on the Consolidated Balance Sheets. We make appropriate provisions for credit losses, which have historically been insignificant in relation to our net sales. Certain contracts with customers have an element of variable consideration that is estimated when revenue is recognized under the contract. Rebates are based on achieving a certain level of purchases and other performance criteria that are documented in established distributor programs. These rebates are estimated based on projected sales to the customer and accrued as a reduction of net sales as they are earned by the customer. Sales, value add and other taxes collected with revenue-producing activities and remitted to governmental authorities are excluded from revenue. Refer to Note 2—Revenue Recognition for additional disclosures on revenue recognition matters. Product Warranties—Estimated expenses related to product warranties and additional service actions are charged to Cost of products sold in the period in which the related revenue is recognized or when significant product quality issues are identified. Research and Development—Research and development costs are expensed as incurred. Income Taxes—Deferred income taxes are recognized for temporary differences between financial and tax reporting. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. If it is more likely than not that some portion or all of a deferred tax asset will not be realized, a valuation allowance is recognized. We record tax benefits related to uncertain tax positions taken or expected to be taken on a tax return when such benefits meet a more likely than not threshold. We recognize interest related to unrecognized tax benefits in interest expense and penalties in operating expenses. Deferred taxes are booked for available cash in excess of working capital for non-U.S. subsidiaries as these earnings are not considered to be permanently reinvested. The Company treats any Global Intangible Low Taxed Income as a period cost. Stock-Based Compensation—We recognize expense for employee and non-employee director stock-based compensation based on the grant date fair value of the awards. Except for retirement-eligible participants, for whom there is no requisite service period, this expense is recognized ratably over the requisite service periods following the date of grant. Derivative Instruments—We may use derivative instruments from time to time to minimize the effects of changes in currency exchange rates. We do not enter into derivative transactions for speculative purposes and do not hold derivative instruments for trading purposes. We designate certain derivative instruments as cash flow hedges to manage exposure to variability in future cash flows related to forecasted transactions. At hedge inception, we formally document the hedging relationship, including the risk management objective, the nature of the risk being hedged, and the method for assessing hedge effectiveness. Hedge effectiveness is evaluated at inception and on an ongoing basis to ensure the hedge remains highly effective. Derivatives are recorded at fair value on the balance sheet and changes in the fair value of derivative instruments designated as fair value hedges are recorded in the balance sheet as adjustments to the underlying hedged asset or liability. The effective portion of gains and losses on cash flow hedges is reported in accumulated other comprehensive loss (“AOCL”) and reclassified into net income in the same period the hedged item affects earnings. Any ineffective portion is recognized immediately into net income. If a hedged forecasted transaction is no longer probable, amounts previously recorded in AOCL are reclassified into net income immediately. When a hedging instrument is terminated, amounts in AOCL remain until the forecasted transaction occurs or is deemed no longer probable. Changes in the fair value of derivative instruments that do not qualify for hedge accounting treatment are recognized immediately into net income. Refer to Note 19—Derivative Financial Instruments for further details on hedging activity. Commitments and Contingencies—For asserted claims and assessments, liabilities are recorded when a loss is deemed to be probable and the amount of the loss is reasonably estimable. Management assesses the probability of an unfavorable outcome with respect to asserted claims or assessments based on many factors such as the nature of the matter, available defenses and case strategy, progress of the matter, views and opinions of legal counsel and other advisors, applicability and success of appeals processes, and the outcome of similar historical matters, among others. Once an unfavorable outcome is assessed to be probable, management evaluates estimates of the potential loss, and the most reasonable loss estimate is recorded (or, if the estimate of the loss is a range, and no amount within the range is considered to be a better estimate than any other amount, the minimum amount in the range is recorded). If a material loss is deemed to be reasonably possible but not probable, the matter is disclosed and no liability is recorded. With respect to unasserted claims or assessments, management first determines whether it is probable that a claim or assessment may be asserted and then, if so, the degree of probability of an unfavorable outcome. If an unfavorable outcome is probable, management assesses whether the amount of potential loss can be reasonably estimated and, if so, accrues the most reasonable estimate of the loss (or, if the estimate of the loss is a range, and no amount within the range is considered to be a better estimate than any other amount, the minimum amount in the range is recorded). If an unfavorable outcome is reasonably possible but less than probable, or the amount of loss cannot be reasonably estimated, then the matter is disclosed and no liability is recorded. Legal matters are reviewed on a continuous basis to determine if there has been a change in management’s judgment regarding the likelihood and/or estimate of a potential loss. Refer to Note 21—Contingencies for further details on product liability related matters. Concentration of credit and business risks—We sell to customers in a broad mix of industries and are exposed to credit risk in the event of nonpayment. Changes in these industries or other developments may significantly affect our financial performance and management's estimates. We mitigate our exposure to credit risk by performing ongoing credit evaluations and, when deemed necessary, requiring letters of credit, credit insurance, prepayments, guarantees or other collateral. No individual customer represented more than 10% of our receivables as of December 31, 2025, or 2024, or sales for any of the three years ended December 31, 2025. Recently Issued Accounting Standards and Disclosure Rules—In November 2024, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update No. 2024-03 (“ASU 2024-03”), Disaggregation of Income Statement Expenses (“DISE”). ASU 2024-03 requires disaggregated disclosure of income statement expenses for public business entities. ASU 2024-03 does not change the expense captions an entity presents on the face of the income statement; rather, it requires disaggregation of certain expense captions into specified categories in disclosures within the footnotes to the financial statements. As revised by ASU No. 2025-01, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures, the provisions of ASU 2024-03 are effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. With the exception of expanding disclosures to include more granular income statement expense categories, we do not expect the adoption of ASU 2024-03 to have a material effect on our consolidated financial statements taken as a whole. In September 2025, the FASB issued ASU No. 2025-06, Targeted Improvements to the Accounting for Internal-Use Software. ASU 2025-06 amends certain aspects of the accounting for software costs under ASC 350-40. ASU 2025-06 makes targeted improvements to ASC 350-40, but does not fully align the framework for accounting for internally developed software costs that are subject to ASC 350-40 with the framework applied to software to be sold or marketed externally that is subject to ASC 985-20. ASU 2025-06 also does not amend the guidance on costs of software licenses that are within the scope of ASC 985-20. ASU 2025-06’s amendments are effective for all entities for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. The Company is still evaluating the impact that the adoption of ASU 2025-06 will have on the condensed consolidated financial statements. In November 2025, the FASB issued ASU 2025‑09, Derivatives and Hedging (Topic 815): Hedge Accounting Improvements. The amendments are intended to improve the clarity, operability, and decision‑usefulness of hedge accounting guidance. ASU 2025‑09 is effective for the Company for annual and interim reporting periods beginning after December 15, 2026 with early adoption permitted. The Company is currently evaluating the impact of ASU 2025‑09 on its consolidated financial statements and related disclosures. Because the guidance primarily relates to hedge accounting mechanics and presentation, the Company does not expect the adoption of this update to have a material effect on our consolidated financial statements taken as a whole.

Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Changes in goodwill during the years ended December 31, 2025 and 2024, were as follows:


(In thousands)	2025		2024
Balance at January 1	$	620,895	$	627,534
Additions and measurement period adjustments (Note 15)	91,616		—


Currency translation	19,081		(6,639)
Balance at December 31	$	731,592	$	620,895

At December 31, 2025, goodwill of $481.4 million and $250.2 million related to the Americas and International reportable segments, respectively.

Changes in intangible assets, net of accumulated amortization, during the years ended December 31, 2025 and 2024, were as follows:


(In thousands)	2025		2024
Net balance at January 1	$	246,437	$	266,134
Additions (Note 15)	66,568		—
Amortization expense	(20,658)		(17,826)
Currency translation	6,780		(1,871)
Net balance at December 31	$	299,127	$	246,437


(In millions)		December 31, 2025						December 31, 2024
Intangible Assets:	Weighted Average Useful Life (years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	20	$	232.2	$	(69.9)	$	162.3	$	179.7	$	(55.7)	$	124.0
Distribution agreements	20	65.7		(36.4)		29.3		65.7		(33.3)		32.4
Technology related assets	9	59.4		(39.7)		19.7		49.6		(35.5)		14.1
Patents, trademarks and copyrights	19	48.6		(21.0)		27.6		34.1		(18.2)		15.9

Other	3	3.1		(2.9)		0.2		2.8		(2.8)		—
Total	19	$	409.0	$	(169.9)	$	239.1	$	337.3	$	(150.9)	$	186.4

At December 31, 2025, the intangible assets balance includes a trade name related to the Globe acquisition with an indefinite life totaling $60.0 million.

Intangible asset amortization expense over the next five years is expected to be approximately $21.9 million in 2026, $21.7 million in 2027, $21.3 million in 2028, $20.6 million in 2029, and $18.3 million in 2030.

Long-Term Debt - Additional Information (Detail)						12 Months Ended
Long-Term Debt - Additional Information (Detail)	May 06, 2025 USD ($)	Apr. 01, 2025 USD ($)	Jun. 29, 2023 USD ($)	Jan. 05, 2023 USD ($)	Jan. 04, 2019	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 GBP (£)	Jul. 01, 2021 USD ($)
Debt Instrument [Line Items]
Weighted-average revolver interest rate						4.56%			4.56%
Line of credit facility, accordion feature						$ 500,000,000
Amounts due within one year						8,225,000	$ 26,391,000
Minimum fixed charges coverage ratio (not less than)					1.50
Maximum consolidated leverage ratio (not to exceed)					3.50
Consolidated leverage ratio (not more than)					4.00
Maturity obligation, year one						8,200,000
Maturity obligation, year two						33,200,000
Maturity obligation, year three						33,200,000
Maturity obligation, year four						8,200,000
Maturity obligation, year five						293,500,000
Maturity obligation, thereafter						208,200,000
Proceeds from lines of credit						9,700,000
Restricted cash balances						900,000	500,000
Long-term debt						580,934,000	508,013,000
Acquisition, net of cash acquired						189,275,000	0	$ 0
M&C
Debt Instrument [Line Items]
Acquisition, net of cash acquired	$ 189,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Proceeds from lines of credit						$ 1,500,000
Series C Senior Notes Due July 2036
Debt Instrument [Line Items]
Debt instrument, stated interest rate percentage						2.69%			2.69%
Series A Senior Notes Due 2036
Debt Instrument [Line Items]
Debt instrument, stated interest rate percentage						2.69%			2.69%
Senior Notes \| Series C Senior Notes Due July 2036
Debt Instrument [Line Items]
Aggregate principal amount										$ 100,000,000
Debt instrument, stated interest rate percentage										2.69%
Senior Notes \| Series A Senior Notes Due 2036
Debt Instrument [Line Items]
Aggregate principal amount										$ 100,000,000
Debt instrument, stated interest rate percentage										2.69%
Senior Notes \| NYL Note Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 200,000,000
Senior Notes \| Senior Notes Due 2028
Debt Instrument [Line Items]
Aggregate principal amount			$ 50,000,000
Debt instrument, stated interest rate percentage			5.25%			5.25%			5.25%
Principal amount due in year before maturity			$ 25,000,000
Principal amount due at maturity			$ 25,000,000
Long-term debt						$ 49,967,000	49,953,000
Unsecured Debt \| Series C Senior Notes Due July 2036
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 335,000,000
Notes Payable \| Multi-currency Notes Due in 2031
Debt Instrument [Line Items]
Aggregate principal amount						$ 49,300,000			£ 36,600,000
Debt instrument, stated interest rate percentage						3.40%			3.40%
Amounts due within one year						$ 8,200,000			£ 6,100,000
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 1,300,000,000
Remaining borrowing capacity						1,000,000,000
Line of Credit \| Revolving Credit Facility \| M&C
Debt Instrument [Line Items]
Amount financed including cash	$ 137,300,000
Line of Credit \| Term Loan Facility 2023 \| Secured Debt
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 250,000,000
Long-term debt						$ 0	$ 205,152,000
Overnight Bank Funding Rate \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage		0.50%
Secured Overnight Financing Rate (SOFR) \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage		1.00%
Minimum \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage		0.00%
Minimum \| Line of Credit \| Term Loan Facility 2023 \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage				0.00%
Maximum \| Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage		1.75%
Maximum \| Line of Credit \| Term Loan Facility 2023 \| Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate margin, percentage				2.00%

Schedule II - Valuation and Qualifying Accounts - Roll Forward (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 8,047	$ 7,065	$ 6,769
Charged to costs and expenses	3,478	2,627	1,899
Deductions from reserves, net	1,239	1,645	1,603
Balance at end of year	10,286	8,047	7,065
Income tax valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	4,815	9,671	10,017
Charged to costs and expenses	1,454	1,113	2,673
Deductions from reserves, net	1,805	5,969	3,019
Balance at end of year	$ 4,464	$ 4,815	$ 9,671

Contingencies - Impact of Divestiture (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 05, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on divestiture of MSA LLC		$ 0	$ 0	$ (129,211)
Tax-effected loss on divestiture of MSA LLC		0	$ 0	$ (199,578)
Discontinued Operations, Disposed of by Sale \| MSA LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ (341,200)	(341,200)
Current insurance receivables		(17,300)
Notes receivable, insurance companies		(5,900)
Noncurrent insurance receivables		(110,300)
Notes receivable, insurance companies, noncurrent		(38,700)
Current product liability		65,100
Noncurrent product liability		324,700
Loss on divestiture of MSA LLC before transaction costs		(123,600)
Transaction costs		(5,600)
Loss on divestiture of MSA LLC		(129,200)
Income tax expense		(70,400)
Tax-effected loss on divestiture of MSA LLC		$ (199,600)

Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2025

Quarterly Financial Information Disclosure [Abstract]

Schedule Of Quarterly Financial Information


	2025
	Quarters
(In thousands, except per share amounts)	1st		2nd		3rd		4th		Year
Net sales	$	421,340	$	474,116	$	468,445	$	510,913	$	1,874,814
Gross profit	193,395		220,710		217,616		239,392		871,113
Net income	59,605		62,773		69,613		86,933		278,924

Earnings per share(1)
Basic	$	1.51	$	1.60	$	1.78	$	2.22	$	7.11
Diluted	1.51		1.59		1.77		2.21		7.09


	2024
	Quarters
(In thousands, except earnings per share)	1st		2nd		3rd		4th		Year
Net sales	$	413,302	$	462,463	$	432,679	$	499,696	$	1,808,140
Gross profit	195,531		223,029		207,456		234,429		860,445
Net income	58,139		72,234		66,648		87,946		284,967

Earnings per share(1)
Basic	$	1.48	$	1.83	$	1.69	$	2.23	$	7.24
Diluted	1.47		1.83		1.69		2.22		7.21
(1) Per share amounts are calculated independently for each period presented; therefore, the sum of the quarterly per share amounts may not equal the per share amounts for the year.

Inventories (Tables)

12 Months Ended

Dec. 31, 2025

Inventory Disclosure [Abstract]

Schedule of Inventories

The following table sets forth the components of inventory:


	December 31,
(In thousands)	2025		2024
Raw materials and supplies	$	228,374	$	190,027
Finished products	99,266		93,356
Work in process	15,395		13,413
Total inventories	$	343,035	$	296,796

Capital Stock - Narrative (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Capital Unit [Line Items]
Preferred stock, par value (in dollars per share)	$ 50,000	$ 50,000
Cumulative preferred nonvoting stock (as a percent)	4.50%	4.50%
Treasury shares, at cost	$ 484,848	$ 398,204
Common stock, shares authorized (in shares)	180,000,000	180,000,000
Common stock, par value (in dollars per share)	$ 0
Common stock, shares issued (in shares)	62,081,391	62,081,391
Common stock, shares, outstanding (in shares)	38,912,629	39,260,080
Beginning balance, Treasury (in shares)	23,168,762	22,821,311
Cumulative preferred stock
Capital Unit [Line Items]
Preferred stock, shares authorized (in shares)	100,000
Preferred stock, par value (in dollars per share)	$ 50
Cumulative preferred nonvoting stock (as a percent)	4.50%
Preferred stock, callable price per share (in dollars per share)	$ 52.50
Preferred stock, shares issued (in shares)	71,340	71,340
Purchase of treasury shares (in shares)	0
Treasury Stock, Preferred, Shares	52,998	52,998
Second cumulative preferred voting stock
Capital Unit [Line Items]
Preferred stock, shares authorized (in shares)	1,000,000
Preferred stock, par value (in dollars per share)	$ 10
Preferred stock, shares issued (in shares)	0	0
Common stock
Capital Unit [Line Items]
Purchase of treasury shares (in shares)		166,292	0
Common stock, shares issued (in shares)	62,081,391	62,081,391
Common stock, value, issued (up to)	$ 200,000
Treasury Stock, Common
Capital Unit [Line Items]
Reissued shares (in shares)	216,350	149,179
Preferred stock
Capital Unit [Line Items]
Treasury shares, at cost	$ 1,800

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Assets
Cash and cash equivalents	$ 165,067	$ 164,560
Trade receivables, less allowance for credit loss of $10,286 and $8,047	306,452	279,213
Inventories (Note 5)	343,035	296,796
Prepaid income taxes	22,465	18,631
Prepaid expenses and other current assets	32,273	43,830
Total current assets	869,292	803,030
Property, plant and equipment, net (Note 6)	283,063	211,865
Operating lease right-of-use assets, net (Note 18)	56,930	56,083
Prepaid pension cost (Note 16)	279,450	224,638
Deferred tax assets (Note 11)	20,991	26,180
Goodwill (Note 14)	731,592	620,895
Intangible assets, net (Note 14)	299,127	246,437
Other noncurrent assets	13,929	16,656
Total assets	2,554,374	2,205,784
Liabilities
Notes payable and current portion of long-term debt (Note 13)	8,225	26,391
Accounts payable	110,775	108,163
Employees’ compensation	57,640	54,826
Income taxes payable (Note 11)	14,240	14,966
Other current liabilities	98,331	83,747
Total current liabilities	289,211	288,093
Long-term debt, net (Note 13)	572,709	481,622
Pensions (Note 16) and other employee benefits	143,834	134,251
Noncurrent operating lease liabilities (Note 18)	46,151	45,984
Deferred tax liabilities (Note 11)	127,540	107,691
Other noncurrent liabilities	7,917	4,824
Total liabilities	1,187,362	1,062,465
Shareholders' Equity
Preferred stock, 4.5% cumulative, $50 par value (Note 8)	3,569	3,569
Common stock, no par value (180,000,000 shares authorized; 62,081,391 shares issued; 38,912,629 and 39,260,080 shares outstanding at December 31, 2025 and 2024, respectively)	343,842	329,953
Treasury shares, at cost (Note 8)	(484,848)	(398,204)
Accumulated other comprehensive loss (Note 7)	(41,781)	(141,649)
Retained earnings	1,546,230	1,349,650
Total shareholders’ equity	1,367,012	1,143,319
Total liabilities and shareholders’ equity	$ 2,554,374	$ 2,205,784

Pensions and Other Post-retirement Benefits - Schedule of Defined Benefit Pension Plans and Other Postretirement Benefits Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Funded Status
Noncurrent assets	$ 279,450	$ 224,638
Noncurrent liabilities	(143,834)	(134,251)
Pension Benefits
Change in Benefit Obligations
Benefit obligations at January 1	474,484	521,474
Service cost	8,118	9,214	$ 7,587
Interest cost	24,178	23,307	23,775
Participant contributions	165	232
Plan amendments	605	(20)
Actuarial (gains) losses	(5,524)	(27,259)
Benefits paid	(29,818)	(28,159)
Settlements	(2,282)	(17,576)
Acquisitions	8,554	0
Currency translation	11,263	(6,729)
Benefit obligations at December 31	489,743	474,484	521,474
Change in Plan Assets
Fair value of plan assets at January 1	580,364	563,449
Actual return on plan assets	83,400	55,610
Employer contributions	6,644	7,877
Participant contributions	165	232
Settlements	(2,282)	(17,576)
Benefits paid	(29,818)	(28,159)
Administrative expenses paid	(56)	(62)
Currency translation	546	(1,007)
Fair value of plan assets at December 31	638,963	580,364	563,449
Funded Status
Funded status at December 31	149,220	105,880
Unrecognized prior service cost	794	728
Unrecognized net actuarial (gains) losses	(1,252)	40,339
Net amount recognized	148,762	146,947
Noncurrent assets	279,450	224,638
Current liabilities	(8,522)	(7,474)
Noncurrent liabilities	(121,708)	(111,284)
Net amount recognized	149,220	105,880
Amounts Recognized in Accumulated Other Comprehensive Loss
Net actuarial (gains) losses	(1,252)	40,339
Prior service cost	794	728
Total (before tax effects)	(458)	41,067
Accumulated Benefit Obligations for all Defined Benefit Plans	464,203	442,734
Other Benefits
Change in Benefit Obligations
Benefit obligations at January 1	22,046	21,386
Service cost	124	176	214
Interest cost	1,104	994	1,090
Participant contributions	222	285
Plan amendments	0	0
Actuarial (gains) losses	(569)	1,696
Benefits paid	(2,269)	(2,491)
Settlements	0	0
Acquisitions	0	0
Currency translation	0	0
Benefit obligations at December 31	20,658	22,046	21,386
Change in Plan Assets
Fair value of plan assets at January 1	0	0
Actual return on plan assets	0	0
Employer contributions	2,047	2,206
Participant contributions	222	285
Settlements	0	0
Benefits paid	(2,269)	(2,491)
Administrative expenses paid	0	0
Currency translation	0	0
Fair value of plan assets at December 31	0	0	$ 0
Funded Status
Funded status at December 31	(20,658)	(22,046)
Unrecognized prior service cost	0	0
Unrecognized net actuarial (gains) losses	5,584	6,804
Net amount recognized	(15,074)	(15,242)
Noncurrent assets	0	0
Current liabilities	(1,963)	(2,145)
Noncurrent liabilities	(18,695)	(19,901)
Net amount recognized	(20,658)	(22,046)
Amounts Recognized in Accumulated Other Comprehensive Loss
Net actuarial (gains) losses	5,584	6,804
Prior service cost	0	0
Total (before tax effects)	5,584	6,804
Accumulated Benefit Obligations for all Defined Benefit Plans	$ 0	$ 0

Leases - Components of Lease Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Operating lease cost	$ 16,000	$ 13,700	$ 12,000
Operating cash flows related to operating leases	16,100	13,500
Right-of-use assets obtained in exchange for new operating lease liabilities	10,000	12,200
Right-of-use assets obtained in acquisitions	$ 800	$ 0
Weighted-average remaining lease term	10 years	11 years
Weighted-average discount rate	3.97%	3.81%

Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2025

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

MSA SAFETY INCORPORATED

VALUATION AND QUALIFYING ACCOUNTS

THREE YEARS ENDED DECEMBER 31, 2025


	2025		2024		2023
	(In thousands)
Allowance for credit loss:
Balance at beginning of year	$	8,047	$	7,065	$	6,769
Additions—
Charged to costs and expenses	3,478		2,627		1,899
Deductions—
Deductions from reserves, net (1)(2)	1,239		1,645		1,603
Balance at end of year	$	10,286	$	8,047	$	7,065
Income tax valuation allowance:
Balance at beginning of year	$	4,815	$	9,671	$	10,017
Additions—
Charged to costs and expenses (3)	1,454		1,113		2,673
Deductions—
Deductions from reserves (3)	1,805		5,969		3,019
Balance at end of year	$	4,464	$	4,815	$	9,671

(1)Bad debts written off, net of recoveries.

(2)Activity for 2025, 2024 and 2023 includes currency translation gains of $239, $1,408 and $1,368, respectively.

(3)Activity for 2025, 2024 and 2023 includes currency translation gains of $156, $218 and $16, respectively.

Pensions and Other Post-retirement Benefits - Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost (Detail)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, average discount rate	5.37%	5.35%
Assumptions used to determine benefit obligations, rate of compensation increase	2.97%	2.96%
Assumptions used to determine net periodic benefit cost, average discount rate, service cost	5.75%	5.02%
Assumptions used to determine net periodic benefit cost, average discount rate, interest cost	5.07%	4.64%
Assumptions used to determine net periodic benefit cost, expected return on plan assets	8.05%	7.23%
Assumptions used to determine net periodic benefit cost, rate of compensation increase	2.96%	3.78%
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Assumptions used to determine benefit obligations, average discount rate	5.09%	5.49%
Assumptions used to determine benefit obligations, rate of compensation increase	3.00%	3.00%
Assumptions used to determine net periodic benefit cost, average discount rate, service cost	5.65%	4.96%
Assumptions used to determine net periodic benefit cost, average discount rate, interest cost	5.22%	4.85%
Assumptions used to determine net periodic benefit cost, expected return on plan assets	0.00%	0.00%
Assumptions used to determine net periodic benefit cost, rate of compensation increase	3.00%	3.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (k)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Name Accounting Standards Codification
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-Paragraph 5
-Subparagraph (j)(2)
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Paragraph 5
-Subparagraph (j)(4)
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-7

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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

+ Details

Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2025

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

The following table sets forth the components of property, plant and equipment:


	December 31,
(In thousands)	2025		2024
Land	$	9,549	$	4,235

Buildings	212,145		142,605
Machinery and equipment	565,082		512,894
Construction in progress	24,964		25,451
Total	811,740		685,185
Less accumulated depreciation	(528,677)		(473,320)
Property, plant and equipment, net	$	283,063	$	211,865

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
	May 06, 2025	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Jul. 01, 2021
Business Combination [Line Items]
Acquisition, net of cash acquired										$ 189,275	$ 0	$ 0
Estimated amortization period		19 years								19 years
Goodwill		$ 731,592				$ 620,895				$ 731,592	620,895	627,534
Strategic acquisition expense										10,500
Net sales		510,913	$ 468,445	$ 474,116	$ 421,340	499,696	$ 432,679	$ 462,463	$ 413,302	1,874,814	1,808,140	1,787,647
Net income		86,933	$ 69,613	$ 62,773	$ 59,605	$ 87,946	$ 66,648	$ 72,234	$ 58,139	278,924	284,967	58,583
Americas
Business Combination [Line Items]
Goodwill		$ 481,400								481,400
M&C
Business Combination [Line Items]
Common stock acquired (as a percent)													100.00%
Acquisition, net of cash acquired	$ 189,000
Finite-lived intangible asset, expected amortization, years one through four	4,000
Finite-lived intangible asset, expected amortization, after year four	43,800
Goodwill	91,600
Strategic acquisition expense										9,200	$ 900	$ 1,000
Net sales										41,000
Net income										$ 4,800
M&C \| Americas
Business Combination [Line Items]
Goodwill	33,700
M&C \| International segment
Business Combination [Line Items]
Goodwill	$ 57,900
Customer relationships
Business Combination [Line Items]
Estimated amortization period		20 years								20 years
Customer relationships \| M&C
Business Combination [Line Items]
Estimated amortization period	20 years
Trade Names [Member] \| M&C
Business Combination [Line Items]
Estimated amortization period	20 years
Developed Technology Rights \| M&C
Business Combination [Line Items]
Estimated amortization period	8 years

Income Taxes - Reconciliation of Change in Tax Liability for Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$ 1,270	$ 3,084
Adjustments for tax positions related to the current year	0	51
Adjustments for tax positions related to prior years	3,347	(607)
Settlements	(194)	(929)
Statute expiration	(138)	(329)
Ending balance	$ 4,285	$ 1,270

Quarterly Financial Information (Unaudited) - Schedule of Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 510,913	$ 468,445	$ 474,116	$ 421,340	$ 499,696	$ 432,679	$ 462,463	$ 413,302	$ 1,874,814	$ 1,808,140	$ 1,787,647
Gross profit	239,392	217,616	220,710	193,395	234,429	207,456	223,029	195,531	871,113	860,445	852,138
Net income	$ 86,933	$ 69,613	$ 62,773	$ 59,605	$ 87,946	$ 66,648	$ 72,234	$ 58,139	$ 278,924	$ 284,967	$ 58,583
Earnings per share
Basic (in dollars per share)	$ 2.22	$ 1.78	$ 1.60	$ 1.51	$ 2.23	$ 1.69	$ 1.83	$ 1.48	$ 7.11	$ 7.24	$ 1.49
Diluted (in dollars per share)	$ 2.21	$ 1.77	$ 1.59	$ 1.51	$ 2.22	$ 1.69	$ 1.83	$ 1.47	$ 7.09	$ 7.21	$ 1.48

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482662/260-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483443/250-10-50-1

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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147483443/250-10-50-4

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147479343/105-10-65-9

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Section 65
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480336/718-10-65-17

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
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-URI https://asc.fasb.org/1943274/2147483443/250-10-50-6

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 260
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-Name Accounting Standards Codification
-Section 55
-Paragraph 52
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482635/260-10-55-52

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476176/805-60-65-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478666/740-323-65-2

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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 15: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

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+ Details

Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Goodwill

Changes in goodwill during the years ended December 31, 2025 and 2024, were as follows:


(In thousands)	2025		2024
Balance at January 1	$	620,895	$	627,534
Additions and measurement period adjustments (Note 15)	91,616		—


Currency translation	19,081		(6,639)
Balance at December 31	$	731,592	$	620,895

Schedule of Finite-Lived Intangible Assets

Changes in intangible assets, net of accumulated amortization, during the years ended December 31, 2025 and 2024, were as follows:


(In thousands)	2025		2024
Net balance at January 1	$	246,437	$	266,134
Additions (Note 15)	66,568		—
Amortization expense	(20,658)		(17,826)
Currency translation	6,780		(1,871)
Net balance at December 31	$	299,127	$	246,437


(In millions)		December 31, 2025						December 31, 2024
Intangible Assets:	Weighted Average Useful Life (years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	20	$	232.2	$	(69.9)	$	162.3	$	179.7	$	(55.7)	$	124.0
Distribution agreements	20	65.7		(36.4)		29.3		65.7		(33.3)		32.4
Technology related assets	9	59.4		(39.7)		19.7		49.6		(35.5)		14.1
Patents, trademarks and copyrights	19	48.6		(21.0)		27.6		34.1		(18.2)		15.9

Other	3	3.1		(2.9)		0.2		2.8		(2.8)		—
Total	19	$	409.0	$	(169.9)	$	239.1	$	337.3	$	(150.9)	$	186.4

Schedule of Indefinite-Lived Intangible Assets

Changes in intangible assets, net of accumulated amortization, during the years ended December 31, 2025 and 2024, were as follows:


(In thousands)	2025		2024
Net balance at January 1	$	246,437	$	266,134
Additions (Note 15)	66,568		—
Amortization expense	(20,658)		(17,826)
Currency translation	6,780		(1,871)
Net balance at December 31	$	299,127	$	246,437


(In millions)		December 31, 2025						December 31, 2024
Intangible Assets:	Weighted Average Useful Life (years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	20	$	232.2	$	(69.9)	$	162.3	$	179.7	$	(55.7)	$	124.0
Distribution agreements	20	65.7		(36.4)		29.3		65.7		(33.3)		32.4
Technology related assets	9	59.4		(39.7)		19.7		49.6		(35.5)		14.1
Patents, trademarks and copyrights	19	48.6		(21.0)		27.6		34.1		(18.2)		15.9

Other	3	3.1		(2.9)		0.2		2.8		(2.8)		—
Total	19	$	409.0	$	(169.9)	$	239.1	$	337.3	$	(150.9)	$	186.4

- Definition

Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

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+ Details

Derivative Financial Instruments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2025 USD ($)
Derivative [Line Items]
Foreign exchange contracts, expected to be reclassified in the next 12 months	$ 200,000
Foreign Exchange Forward \| Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional amount of open forward contracts	113,400,000
Unrealized gain (loss) on derivatives	0
Foreign Exchange Forward \| Cash Flow Hedging \| Designated as Hedging Instrument
Derivative [Line Items]
Notional amount of open forward contracts	$ 31,600,000

- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References + Details

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 30.0
Net operating loss carryforwards, expiration term (at least)	6 years
Recognized tax benefits	$ 1.5	$ 0.0
Liability for interest expense and penalties accrued	0.5	0.2
Pillar 2 additional tax expense	$ 2.2	$ 1.1

Consolidated Statements of Changes in Retained Earnings, Accumulated Other Comprehensive Loss and Noncontrolling Interests - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		$ 1,143,319			$ 1,143,319
Net income	$ 86,933	59,605	$ 87,946	$ 58,139	278,924	$ 284,967	$ 58,583
Pension and post-retirement plan adjustments, net of tax					32,574	31,262	7,683
Unrecognized net gains on available-for-sale securities (Note 19)							2
Unrecognized net loss on hedges (Note 19)					(215)	0	0
Preferred stock dividends					(41)	(41)	(41)
Balance at end of period	1,367,012		1,143,319		1,367,012	1,143,319
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		1,349,650		1,143,442	1,349,650	1,143,442	1,158,347
Net income					278,924	284,967	58,583
Common dividends					(82,303)	(78,718)	(73,447)
Preferred stock dividends					(41)	(41)	(41)
Balance at end of period	1,546,230		1,349,650		1,546,230	1,349,650	1,143,442
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		$ (141,649)		$ (129,249)	(141,649)	(129,249)	(158,717)
Foreign currency translation adjustments					68,273	(42,462)	21,682
Pension and post-retirement plan adjustments, net of tax					32,574	31,262	7,683
Unrecognized net loss on hedges (Note 19)					(215)
Reclassification of currency translation from accumulated other comprehensive loss into net income (Note 7)					(764)	(1,200)	101
Balance at end of period	$ (41,781)		$ (141,649)		$ (41,781)	$ (141,649)	$ (129,249)

Contingencies (Tables)

12 Months Ended

Dec. 31, 2025

Commitments and Contingencies Disclosure [Abstract]

Schedule of Discontinued Operations

Below is a summary of the impact of the divestiture of MSA LLC on our Consolidated Statements of Income for the year ended December 31, 2023:


(In millions)	Year Ended December 31, 2023
Cash and cash equivalents	$	(341.2)
Current insurance receivables	(17.3)
Notes receivable, insurance companies	(5.9)
Noncurrent insurance receivables	(110.3)
Notes receivable, insurance companies, noncurrent	(38.7)
Current product liability	65.1
Noncurrent product liability	324.7
Loss on divestiture of MSA LLC before transaction costs	(123.6)
Transaction costs	(5.6)
Loss on divestiture of MSA LLC	(129.2)
Income tax expense (a)	(70.4)
Tax-effected loss on divestiture of MSA LLC	$	(199.6)
(a) Related to the write-off of deferred tax asset related to product liability reserve

Schedule of Product Warranty Liability

The following table reconciles the changes in the Company's accrued warranty reserve:


	December 31,
(In thousands)	2025		2024		2023
Beginning warranty reserve	$	13,724	$	14,288	$	15,230
Warranty payments	(15,129)		(11,802)		(9,794)
Warranty claims, current	12,922		10,684		9,128
Warranty claims, preexisting	82		765		(614)

Currency translation and other adjustments	265		(211)		338
Ending warranty reserve	$	11,864	$	13,724	$	14,288

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

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+ Details

Segment Information

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Segment Information

The Company is organized into four geographical operating segments that are based on management responsibilities: Northern North America; Latin America; Europe, Middle East & Africa; and Asia Pacific. The operating segments have been aggregated (based on economic similarities, the nature of their products and solutions, end-user markets and methods of distribution) into two reportable segments: Americas and International.

The Americas segment is comprised of our operations in Northern North America and Latin America geographies. The International segment is comprised of our operations in all geographies outside of the Americas. Certain global expenses are allocated to each segment in a manner consistent with where the benefits from the expenses are derived. General and administrative expenses incurred in our corporate headquarters, costs associated with corporate development initiatives, legal expense, interest expense, foreign exchange gains or losses and other centrally-managed costs are considered corporate expenses and are not allocated to the reportable segments.

The Company's sales are allocated to each segment based primarily on the country destination of the end-customer.

The Company adopted ASU No. 2023-07 (“ASU 2023-07”), Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures for the year ended December 31, 2024 and applied it retrospectively for all prior periods presented.

Adjusted operating income is the measure used by the chief operating decision maker, identified as our President and Chief Executive Officer, to evaluate reportable segment performance and identify opportunities when allocating resources. Adjusted operating income is defined as operating income excluding restructuring charges, currency exchange, product liability expense, loss on divestiture of Mine Safety Appliances Company, LLC ("MSA LLC"), net cost for product-related legal matter, transaction costs and acquisition-related amortization.

The accounting principles applied at the operating segment level in determining the segment measure of profit or loss are the same as those applied at the consolidated financial statement level. Sales and transfers between operating segments are accounted for at market-based transaction prices and are eliminated in consolidation.

Reportable segment information is presented in the following table:


(In thousands)	Americas		International		Corporate/Reconciling Items(a)			Consolidated Totals
2025
Net sales to external customers	$	1,261,841	$	612,973	$	—		$	1,874,814
Less:
Cost of products sold	644,402		346,683		—
Selling, general and administrative	214,011		146,364		43,412
Research and development	38,670		26,674		—
Adjusted operating income	$	364,758	$	93,252


Noncash items:
Depreciation and amortization	47,530		22,864		1,197			$	71,591
Pension (income) expense	(17,799)		3,823		—			(13,976)
Total Assets	1,621,335		935,830		(2,791)		(b)	2,554,374
Capital expenditures	34,479		13,804		20,155			68,438
2024
Net sales to external customers	$	1,246,641	$	561,499	$	—		$	1,808,140
Less:
Cost of products sold	618,019		320,502		—
Selling, general and administrative	208,753		129,683		50,385
Research and development	39,783		26,743		—
Adjusted operating income	$	380,086	$	84,571









Noncash items:
Depreciation and amortization	46,289		17,164		880			64,333
Pension (income) expense	(11,854)		3,707		—			(8,147)
Total Assets	1,480,124		682,816		42,844			2,205,784
Capital expenditures	31,546		19,091		3,586			54,223
2023
Net sales to external customers	$	1,235,594	$	552,053	$	—		$	1,787,647
Less:
Cost of products sold	619,948		306,443		(128)
Selling, general and administrative	215,236		128,720		51,724
Research and development	40,793		27,191		4







Adjusted operating income	$	359,617	$	89,699

Noncash items:
Depreciation and amortization	44,170		15,760		843			60,773
Pension (income) expense	(11,873)		3,958		—			(7,915)
Total Assets	1,433,244		734,856		2,050			2,170,150
Capital expenditures	28,011		13,341		1,412			42,764
(a) Corporate/Reconciling items consist primarily of corporate expenses and other items not directly attributable to reportable segments. (b) Negative Corporate and reconciling items assets driven primarily by bank overdrafts under our notional cash pooling arrangement. Refer to Note 3—Cash and Cash Equivalents for further details.

A reconciliation of total Adjusted operating income from reportable segments to Income before income taxes is presented in the following table:


(In thousands)	2025		2024		2023













Adjusted operating income	$	458,010	$	464,657	$	449,316
Less:
Corporate Expenses	43,412		50,385		51,600
Restructuring charges (Note 4)	3,897		6,397		9,892
Currency exchange losses, net	15,801		3,638		17,079
Interest expense	31,799		36,889		46,733
Other income, net (Note 17)	(26,379)		(22,718)		(22,101)
Acquisition-related amortization	12,615		9,174		9,246
Transaction costs(a)	10,467		886		965
Net cost for product-related legal matter	—		5,000		—
Loss on divestiture of MSA LLC (Note 21)	—		—		129,211
Product liability expense (Note 21)	—		—		3
Income before income taxes	$	366,398	$	375,006	$	206,688
(a)Transaction costs include advisory, legal, accounting, valuation, and other professional or consulting fees incurred during our evaluation of or in connection with acquisitions and divestitures. These costs are included in Selling, general and administrative expense in the Consolidated Statements of Operations.

Geographic information on Net sales to external customers, based on country of origin:


(In thousands)	2025		2024		2023
United States	$	943,363	$	954,979	$	961,062
Other	931,451		853,161		826,585
Total	$	1,874,814	$	1,808,140	$	1,787,647

Geographic information on tangible long-lived assets, net, based on country of origin:


(In thousands)	2025		2024		2023
United States	$	177,507	$	160,760	$	156,937


Germany	65,230		17,198		18,596
United Kingdom	28,627		30,274		24,740
Other	68,629		59,716		64,902
Total	$	339,993	$	267,948	$	265,175

Total Net sales by product category was as follows:


2025	Consolidated			Americas			International
(In thousands)	Dollars		Percent	Dollars		Percent	Dollars		Percent
Detection (a)	$	763,393	41%	$	501,784	40%	$	261,609	43%
Fire Service (b)	647,474		34%	446,245		35%	201,229		33%
Industrial PPE and Other (c)	463,947		25%	313,812		25%	150,135		24%
Total	$	1,874,814	100%	$	1,261,841	100%	$	612,973	100%

2024	Consolidated			Americas			International
(In thousands)	Dollars		Percent	Dollars		Percent	Dollars		Percent
Detection (a)	$	642,792	36%	$	426,839	34%	$	215,953	38%
Fire Service (b)	712,684		39%	507,738		41%	204,946		36%
Industrial PPE and Other (c)	452,664		25%	312,064		25%	140,600		26%
Total	$	1,808,140	100%	$	1,246,641	100%	$	561,499	100%

2023	Consolidated			Americas			International
(In thousands)	Dollars		Percent	Dollars		Percent	Dollars		Percent
Detection (a)	$	634,915	36%	$	419,312	34%	$	215,603	39%
Fire Service (b)	684,224		38%	501,676		41%	182,548		33%
Industrial PPE and Other (c)	468,508		26%	314,606		25%	153,902		28%
Total	$	1,787,647	100%	$	1,235,594	100%	$	552,053	100%
(a) Detection includes Fixed Gas and Flame Detection and Portable Gas Detection. Detection includes sales from the M&C acquisition from May 6th, 2025 onward (Americas and International). Refer to Note 15—Acquisitions for further information. (b) Fire Service includes Breathing Apparatus and Firefighter Helmets and Protective Apparel. (c) Industrial PPE and Other includes Industrial Head Protection, Fall Protection and other.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 278,924	$ 284,967	$ 58,583
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments (Note 7)	68,273	(42,462)	21,682
Pension and post-retirement plan actuarial gains, net of tax (Note 7)	32,574	31,262	7,683
Unrealized losses on cash flow hedges (Note 7)	(215)	0	0
Unrealized gains on available-for-sale securities (Note 7)	0	0	2
Reclassification of currency translation from accumulated other comprehensive loss into net income (Note 7)	(764)	(1,200)	101
Total other comprehensive income (loss), net of tax	99,868	(12,400)	29,468
Comprehensive income	$ 378,792	$ 272,567	$ 88,051

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
Cybersecurity Risk Management and Strategy Disclosure	Dec. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	Managing Material Risks & Integrated Overall Risk Management We assess, identify, and manage our cybersecurity risks by employing several processes, including conducting employee training, monitoring and testing our networks and systems, responding to vulnerability and threat assessments, and maintaining and refreshing backup and protective systems. Cybersecurity risk management is also a component of our overall Enterprise Risk Management (“ERM”) program. Both the cybersecurity risk management component of the ERM program and associated risk management plans, including risk mitigation, are reviewed at regular intervals and updated as needed. Related reporting to management occurs on a routine basis, and the Board of Directors is updated through an established cadence via the Board’s Audit Committee and the full Board. The Company has an information security policy, and it provides cybersecurity training to employees on a recurring basis throughout the year. As part of our processes, employees are trained on how to identify and report potential cybersecurity threats. The Company also engages in an ongoing process of risk assessments to identify and mitigate cybersecurity threats. This includes a vulnerability management program where such risks are identified, classified, and addressed. The Company conducts cybersecurity exercises to enhance mitigating controls and incident response preparedness. The Company also has incident response plans in place to address contingencies in the event of a cybersecurity incident. Engage Third Parties on Risk Management As part of our cybersecurity risk management process, MSA engages a range of third parties, including consultants, advisors, and auditors, to assist with security and maturity assessments, security operations, employee training and awareness, compliance, penetration testing, network and endpoint monitoring, threat intelligence, and our vulnerability management platform. These relationships enable us to access specialized knowledge and insights with respect to our cybersecurity strategies and processes. Oversee Third-Party Risk We are aware of risks associated with third-party service providers, and the Company employs a third-party risk management program that includes a systematic evaluation of potential risks associated with engaging third-party vendors, suppliers or partners that may have access to Company sensitive information, systems, or networks. This process is also intended to provide for the security and integrity of the Company’s data that may be stored on third-party systems. The process identifies and addresses potential security vulnerabilities, safeguarding Company information assets and reducing the overall risk of cyber threats. The Company’s assessments begin during the onboarding of third parties and may continue throughout the relationship, based upon an assessment of third-party risk. Those assessments also include Company audit rights, third-party notification obligations, and security requirements for the retention of Company data. The Company maintains a team consisting of employees, contractors and consultants to oversee this process. Risks from Cybersecurity Threats From time to time, we have experienced attempts by unauthorized parties to access or disrupt our information technology systems. To date, we have not experienced any known material breaches or material losses related to cyber-attacks. However, a failure of our information systems or a cybersecurity breach could materially and adversely affect our business, results of operations and financial condition. See Item 1A, “Risks related to Cybersecurity or Misappropriation of Our Critical Information.”
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	We assess, identify, and manage our cybersecurity risks by employing several processes, including conducting employee training, monitoring and testing our networks and systems, responding to vulnerability and threat assessments, and maintaining and refreshing backup and protective systems. Cybersecurity risk management is also a component of our overall Enterprise Risk Management (“ERM”) program. Both the cybersecurity risk management component of the ERM program and associated risk management plans, including risk mitigation, are reviewed at regular intervals and updated as needed.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	The Audit Committee and the Board of Directors oversee and periodically review the design and effectiveness of the Company’s cybersecurity program, as well as its contingency plans. On an established cadence, the Audit Committee and the Board of Directors are briefed by the Chief Information Security Officer (“CISO”) on the status and progress of the cybersecurity program, as well as on direct or emerging threats to the Company, program maturity and strategy, and third-party risk management. Additionally, the Board of Directors receives ERM program briefings that include cybersecurity risks.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Company employs a CISO with substantial program management experience, along with a team of cybersecurity and IT professionals.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Company employs a CISO with substantial program management experience, along with a team of cybersecurity and IT professionals. The CISO reports to the Chief Information Officer. The Chief Information Officer reports to the Senior Vice President and Chief Product and Technology Officer, who is a member of the Company’s Executive Leadership Team. Additionally, the CISO reports regularly on the cybersecurity program, including risks and mitigation, to the Cybersecurity Executive Steering Body. The Cybersecurity Executive Steering Body provides strategic oversight and is responsible for guiding and aligning organizational efforts to manage risks associated with cybersecurity threats. It is intended to ensure comprehensive risk management, effective policy development, and coordinated response measures to safeguard sensitive information and technology assets.
Cybersecurity Risk Role of Management [Text Block]	Company management is directly involved in assessing and managing risks from cybersecurity threats. The Company employs a CISO with substantial program management experience, along with a team of cybersecurity and IT professionals. The CISO reports to the Chief Information Officer. The Chief Information Officer reports to the Senior Vice President and Chief Product and Technology Officer, who is a member of the Company’s Executive Leadership Team. Additionally, the CISO reports regularly on the cybersecurity program, including risks and mitigation, to the Cybersecurity Executive Steering Body. The Cybersecurity Executive Steering Body provides strategic oversight and is responsible for guiding and aligning organizational efforts to manage risks associated with cybersecurity threats. It is intended to ensure comprehensive risk management, effective policy development, and coordinated response measures to safeguard sensitive information and technology assets. The Cybersecurity Executive Steering Body includes members of the Executive Leadership Team, among other senior managers, including cross-functional representation from Cybersecurity, Product and Technology, Law, Finance, and Operations departments. Collectively, the Cybersecurity Executive Steering Body has decades of enterprise risk management experience, including cybersecurity risk management.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The Company employs a CISO with substantial program management experience, along with a team of cybersecurity and IT professionals.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	substantial program management experience
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	Company management is directly involved in assessing and managing risks from cybersecurity threats. The Company employs a CISO with substantial program management experience, along with a team of cybersecurity and IT professionals. The CISO reports to the Chief Information Officer. The Chief Information Officer reports to the Senior Vice President and Chief Product and Technology Officer, who is a member of the Company’s Executive Leadership Team. Additionally, the CISO reports regularly on the cybersecurity program, including risks and mitigation, to the Cybersecurity Executive Steering Body. The Cybersecurity Executive Steering Body provides strategic oversight and is responsible for guiding and aligning organizational efforts to manage risks associated with cybersecurity threats. It is intended to ensure comprehensive risk management, effective policy development, and coordinated response measures to safeguard sensitive information and technology assets. The Cybersecurity Executive Steering Body includes members of the Executive Leadership Team, among other senior managers, including cross-functional representation from Cybersecurity, Product and Technology, Law, Finance, and Operations departments. Collectively, the Cybersecurity Executive Steering Body has decades of enterprise risk management experience, including cybersecurity risk management. Monitor Cybersecurity Incidents The Company’s cybersecurity incident response plan provides a structured approach to prevent, detect, manage and mitigate a cybersecurity incident. Primary goals are to minimize harm to information technology systems and Company information, reduce recovery time, and ensure the continuity of operations. Internal resources manage and execute the Company’s cybersecurity incident response plan with the support of retained external advisors. Plan testing and assessments occur to provide for the ongoing effectiveness against evolving threats. Pursuant to the plan, communication channels and escalation protocols are also maintained to engage and inform internal stakeholders – such as the Cybersecurity Executive Steering Body, corporate crisis management team, and other members of the Executive Leadership Team – of how incidents are prevented, detected, mitigated, and remediated. The Company’s measures to prevent and detect cyber security incidents include continuous monitoring of Company networks by a security operations team that includes a third-party managed security operations center. Employees throughout the Company are trained to report cybersecurity threats as they are identified. If an incident or suspected incident is reported, the cybersecurity team evaluates it for various factors, including severity and immediacy, pursuant to the Company’s cybersecurity incident response plan.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Inventories

12 Months Ended

Dec. 31, 2025

Inventory Disclosure [Abstract]

Inventories

The following table sets forth the components of inventory:


	December 31,
(In thousands)	2025		2024
Raw materials and supplies	$	228,374	$	190,027
Finished products	99,266		93,356
Work in process	15,395		13,413
Total inventories	$	343,035	$	296,796

Capital Stock

12 Months Ended

Dec. 31, 2025

Equity [Abstract]

Capital Stock

Preferred Stock—The Company has authorized 100,000 shares of $50 par value 4.5% cumulative preferred nonvoting stock which is callable at $52.50. There were 71,340 shares issued and 52,998 shares held in treasury at both December 31, 2025 and 2024. The Treasury shares at cost line of the Consolidated Balance Sheets includes $1.8 million related to preferred stock. There were no shares of preferred stock purchased and subsequently held in treasury during the years ended December 31, 2025, or 2024. The Company has also authorized 1,000,000 shares of $10 par value second cumulative preferred voting stock. No shares have been issued as of December 31, 2025 or 2024.

Common Stock—The Company has authorized 180,000,000 shares of no par value common stock. There were 62,081,391 shares issued as of December 31, 2025 and December 31, 2024. No new shares were issued during the years ended December 31, 2025, or 2024. There were 38,912,629 and 39,260,080 shares outstanding at December 31, 2025 and 2024, respectively.

Treasury Shares—The Company's 2024 stock repurchase program authorizes up to $200.0 million to repurchase MSA common stock in the open market and in private transactions. The share repurchase program has no expiration date. The maximum number of shares that may be purchased is calculated based on the dollars remaining under the program and the respective month-end closing share price. Under this and prior stock repurchase programs, there were 501,420 shares repurchased during 2025, 166,292 shares repurchased during 2024, and no shares repurchased during 2023. There were 23,168,762 and 22,821,311 Treasury shares at December 31, 2025 and 2024, respectively.

The Company issues Treasury shares for all stock based benefit plans. Shares are issued from Treasury at the average Treasury share cost on the date of the transaction. There were 216,350 and 149,179 Treasury shares issued for these purposes during the years ended December 31, 2025 and 2024, respectively.

Common stock activity is summarized as follows:


	Shares		Dollars
(Dollars in thousands)	Issued	Treasury	Common Stock		Treasury Cost(a)
Balance at January 1, 2023	62,081,391	(22,868,327)	$	281,980	$	(359,838)
Restricted stock awards	—	40,856	(643)		643
Restricted stock expense	—	—	9,476		—
Restricted stock forfeitures	—	—	(1,414)		—
Stock options exercised	—	31,394	970		503
Stock option expense	—	—	11		—
Stock option forfeitures	—	—	(11)		—
Performance stock issued	—	53,407	(855)		855
Performance stock expense	—	—	23,546		—
Performance stock forfeitures	—	—	(1,585)		—

Employee stock purchase plan shares issued	—	7,140	849		114

Treasury shares purchased	—	(28,649)	—		(3,961)


Balances December 31, 2023	62,081,391	(22,764,179)	$	312,324	$	(361,684)
Restricted stock awards	—	52,098	(842)		842
Restricted stock expense	—	—	15,769		—
Restricted stock forfeitures	—	—	(4,530)		—
Stock options exercised	—	10,666	327		174
Stock option expense	—	—	41		—
Stock option forfeitures	—	—	(41)		—
Performance stock issued	—	77,544	(1,256)		1,256
Performance stock expense	—	—	8,394		—
Performance stock forfeitures	—	—	(1,634)		—
Employee stock purchase expense	—	—	186		—
Employee stock purchase plan shares issued	—	8,871	1,215		148
Treasury shares purchased	—	(40,019)	—		(7,408)
Share repurchase program	—	(166,292)	—		(29,932)
Balances December 31, 2024	62,081,391	(22,821,311)	$	329,953	$	(396,604)
Restricted stock awards	—	69,691	(1,288)		1,288
Restricted stock expense	—	—	12,202		—
Restricted stock forfeitures	—	—	(2,223)		—
Stock options exercised	—	12,776	334		235

Stock option forfeitures	—	—	(1)		—
Performance stock issued	—	118,605	(2,109)		2,109
Performance stock expense	—	—	8,041		—
Performance stock forfeitures	—	—	(3,179)		—

Employee stock purchase plan shares issued	—	15,278	1,756		286
Employee stock purchase plan expense	—	—	356		—
Treasury shares purchased	—	(62,381)	—		(10,570)
Share repurchase program	—	(501,420)	—		(79,992)
Balances December 31, 2025	62,081,391	(23,168,762)	$	343,842	$	(483,248)
(a)Excludes treasury cost related to preferred stock.

- Definition

The entire disclosure for equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-Name Accounting Standards Codification
-Section 50
-Paragraph 8A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Section 50
-Paragraph 13
-Subparagraph (b)
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Paragraph 13
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 14
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
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-URI https://asc.fasb.org/1943274/2147477968/946-235-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478448/946-505-50-6

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-6

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/505/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-13

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-14

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-16

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

+ Details

Contingencies

12 Months Ended

Dec. 31, 2025

Commitments and Contingencies Disclosure [Abstract]

Contingencies

Product liability

The Company and its subsidiaries face an inherent business risk of exposure to product liability claims arising from the alleged failure of our products to prevent the types of personal injury or death against which they are designed to protect.

Single incident product liability claims. Single incident product liability claims involve incidents of short duration that are typically known when they occur and involve observable injuries, which provide an objective basis for quantifying damages. Management has established reserves for the single incident product liability claims of the Company's various subsidiaries, including asserted single incident product liability claims and incurred but not reported ("IBNR") single incident claims. To determine the reserves, Management makes reasonable estimates of losses for single incident claims based on the number and characteristics of asserted claims, historical experience, sales volumes, expected settlement costs, and other relevant information.

Cumulative trauma product liability claims. Cumulative trauma product liability claims involve alleged exposures to harmful substances (e.g., silica, asbestos and coal dust) that occurred years ago and may have developed over long periods of time into diseases such as silicosis, asbestosis, mesothelioma, or coal worker’s pneumoconiosis. A former subsidiary of the Company, Mine Safety Appliances Company, LLC ("MSA LLC"), which was divested as described below, has been named as a defendant in various lawsuits related to such claims. These lawsuits mainly involve respiratory protection products allegedly manufactured and sold by MSA LLC or its predecessors.

On January 5, 2023, the Company entered into a membership interest purchase agreement (the “Purchase Agreement”) with a joint venture between R&Q Insurance Holdings Ltd. and Obra Capital, Inc. (the "Purchaser"). Under the Purchase Agreement, on January 5, 2023, the Company transferred to the Purchaser all of the issued and outstanding limited liability company interests of MSA LLC (the “Sale”). In connection with the closing, the Company contributed $341.2 million in cash and cash equivalents, while the Purchaser contributed an additional $35.0 million.

As MSA LLC was the obligor for the claims to which the Company's legacy cumulative trauma product liability reserves relate and the policyholder of the related insurance assets, the rights and obligations related to these items remained with MSA LLC when it transferred to the Purchaser's ownership pursuant to the Purchase Agreement. In addition, pursuant to the Purchase Agreement, the Purchaser and MSA LLC have agreed to indemnify the Company and its affiliates for legacy cumulative trauma product liabilities and other product liabilities, and a subsidiary of the Company has agreed to indemnify MSA LLC for all other historical liabilities of MSA LLC. This indemnification is not subject to any cap or time limitation. In connection with the Sale, the Company and its Board of Directors received a solvency opinion from an independent advisory firm that MSA LLC was solvent and adequately capitalized after giving effect to the transaction.

Following the completion of the transaction, the Company no longer has any obligation with respect to pending and future cumulative trauma product liability claims relating to these matters. As such, all legacy cumulative trauma product liability reserves, related insurance assets, and associated deferred tax assets of the divested subsidiary were derecognized from our balance sheet and the Company incurred a tax-effected loss on the divestiture of MSA LLC of $199.6 million, including transaction related costs of $5.6 million. The Purchaser assumed management of the divested subsidiary, including the management of its claims and associated assets.

Below is a summary of the impact of the divestiture of MSA LLC on our Consolidated Statements of Income for the year ended December 31, 2023:


(In millions)	Year Ended December 31, 2023
Cash and cash equivalents	$	(341.2)
Current insurance receivables	(17.3)
Notes receivable, insurance companies	(5.9)
Noncurrent insurance receivables	(110.3)
Notes receivable, insurance companies, noncurrent	(38.7)
Current product liability	65.1
Noncurrent product liability	324.7
Loss on divestiture of MSA LLC before transaction costs	(123.6)
Transaction costs	(5.6)
Loss on divestiture of MSA LLC	(129.2)
Income tax expense (a)	(70.4)
Tax-effected loss on divestiture of MSA LLC	$	(199.6)
(a) Related to the write-off of deferred tax asset related to product liability reserve

Other Litigation

Globe, a subsidiary of the Company, is defending claims in which plaintiffs assert that certain products allegedly containing per- and polyfluoroalkyl substances (“PFAS”) have caused harm, including injury or health issues. PFAS are a large class of substances that are widely used in everyday products. Specifically, Globe builds firefighter turnout gear from technical fabrics sourced from a small pool of specialty textile manufacturers. These protective fabrics have been tested and certified to meet current National Fire Protection Association safety standards, and some of them as supplied to Globe contain or historically have contained PFAS to achieve performance characteristics such as water, oil, or chemical resistance.

Globe believes it has valid defenses to these claims. These matters are at a very early stage with numerous factual and legal issues to be resolved. Defense costs relating to these lawsuits are recognized in the Consolidated Statements of Income as incurred. Globe is also pursuing insurance coverage and indemnification related to the lawsuits. As of February 4, 2026, Globe was named as a defendant in approximately 1,288 lawsuits comprised of about 22,090 claims based on a largely common set of assertions, predominantly styled as individual personal injury claims and including several putative class actions. Certain of these lawsuits include MSA Safety Inc. or other Globe affiliates as defendants.

MSA LLC is also a defendant in a number of PFAS lawsuits predominantly relating to Aqueous Film-Forming Foam. The Purchaser assumed responsibility for these and any similar future claims specific to MSA LLC, including such claims that have been or may be brought against MSA Safety Inc. or its subsidiaries, under the terms of the Purchase Agreement governing the Company's January 5, 2023, divestiture of MSA LLC. Further information about the transaction can be found in the Company’s Current Report on Form 8-K filed on January 6, 2023.

Product Warranty

The Company provides warranties on certain product sales. Product warranty reserves are established in the same period that revenue from the sale of the related products is recognized, or in the period that a specific issue arises as to the functionality of the Company's product. The determination of such reserves requires the Company to make estimates of product return rates and expected costs to repair or to replace the products under warranty.

The amounts of the reserves are based on established terms and the Company's best estimate of the amounts necessary to settle future and existing claims on products sold as of the balance sheet date. If actual return rates and/or repair and replacement costs differ significantly from estimates, adjustments to recognize additional cost of sales may be required in future periods.

The following table reconciles the changes in the Company's accrued warranty reserve:


	December 31,
(In thousands)	2025		2024		2023
Beginning warranty reserve	$	13,724	$	14,288	$	15,230
Warranty payments	(15,129)		(11,802)		(9,794)
Warranty claims, current	12,922		10,684		9,128
Warranty claims, preexisting	82		765		(614)

Currency translation and other adjustments	265		(211)		338
Ending warranty reserve	$	11,864	$	13,724	$	14,288

Warranty expense for the years ended December 31, 2025, 2024 and 2023 was $13.0 million, $11.2 million and $8.9 million, respectively, and is included in Costs of products sold on the Consolidated Statements of Income.

Stock Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercisable period after grant date		3 years
Restricted stock and restricted stock unit vest period after grant date		3 years
Cash proceeds from exercise of options		$ 569	$ 501	$ 1,473
Aggregate intrinsic value of stock options exercisable		200
Total intrinsic value of stock options exercised		1,400	1,500	3,700
Unrecognized stock-based compensation expense		$ 17,300
Weighted average period over which unrecognized stock-based compensation expense is expected to be recognized, in years		1 year 6 months
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award based on achieving targeted performance conditions		0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award based on achieving targeted performance conditions		240.00%
Percentage of target award based on achieving targeted return on net assets based on which final number of shares to be issued for performance stock units		220.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of option tax benefit		$ 700	600	900
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of stock units vested		9,700	8,300	5,400
Performance stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Fair value of stock units vested		$ 17,000	$ 13,500	$ 6,800
Management
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future grants (in shares)		1,612,699
Non employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future grants (in shares)		79,844
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options expiration period		10 years
Employee Stock Purchase Plan \| 2014 MSA Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP, discount percantage		15.00%
Employee Stock Purchase Plan \| Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future grants (in shares)		53,126

Pensions and Other Post-retirement Benefits

12 Months Ended

Dec. 31, 2025

Retirement Benefits [Abstract]

Pensions and Other Post-retirement Benefits

We maintain various defined benefit and defined contribution plans covering the majority of our employees. Our principal U.S. plan is funded in compliance with the Employee Retirement Income Security Act ("ERISA"). It is our general policy to fund current costs for the international plans according to local requirements and general market practice. We provide health care benefits and limited life insurance for certain retired employees who are covered by our principal U.S. defined benefit pension plan until they become Medicare-eligible.

Defined benefit pension plan and other post-retirement benefits plan information is provided in the following tables:


	Pension Benefits				Other Benefits
(In thousands)	2025		2024		2025		2024
Change in Benefit Obligations
Benefit obligations at January 1	$	474,484	$	521,474	$	22,046	$	21,386
Service cost	8,118		9,214		124		176
Interest cost	24,178		23,307		1,104		994
Participant contributions	165		232		222		285
Plan amendments	605		(20)		—		—
Actuarial (gains) losses(a)	(5,524)		(27,259)		(569)		1,696
Benefits paid	(29,818)		(28,159)		(2,269)		(2,491)

Settlements	(2,282)		(17,576)		—		—


Acquisitions	8,554		—		—		—
Currency translation	11,263		(6,729)		—		—
Benefit obligations at December 31	$	489,743	$	474,484	$	20,658	$	22,046
Change in Plan Assets
Fair value of plan assets at January 1	$	580,364	$	563,449	$	—	$	—
Actual return on plan assets	83,400		55,610		—		—
Employer contributions	6,644		7,877		2,047		2,206
Participant contributions	165		232		222		285

Settlements	(2,282)		(17,576)		—		—
Benefits paid	(29,818)		(28,159)		(2,269)		(2,491)


Administrative expenses paid	(56)		(62)		—		—
Currency translation	546		(1,007)		—		—
Fair value of plan assets at December 31	$	638,963	$	580,364	$	—	$	—
Funded Status
Funded status at December 31	$	149,220	$	105,880	$	(20,658)	$	(22,046)

Unrecognized prior service cost	794		728		—		—
Unrecognized net actuarial (gains) losses	(1,252)		40,339		5,584		6,804
Net amount recognized	$	148,762	$	146,947	$	(15,074)	$	(15,242)
Amounts Recognized in the Balance Sheets
Noncurrent assets	$	279,450	$	224,638	$	—	$	—
Current liabilities	(8,522)		(7,474)		(1,963)		(2,145)
Noncurrent liabilities	(121,708)		(111,284)		(18,695)		(19,901)
Net amount recognized	$	149,220	$	105,880	$	(20,658)	$	(22,046)
Amounts Recognized in Accumulated Other Comprehensive Loss
Net actuarial (gains) losses	$	(1,252)	$	40,339	$	5,584	$	6,804
Prior service cost	794		728		—		—

Total (before tax effects)	$	(458)	$	41,067	$	5,584	$	6,804
Accumulated Benefit Obligations for all Defined Benefit Plans	$	464,203	$	442,734	$	—	$	—
(a)Actuarial (gains) losses for both periods relate primarily to the increase in discount rates used in measuring plan obligations as of December 31, 2025, and 2024, respectively.


	Pension Benefits						Other Benefits
(In thousands)	2025		2024		2023		2025		2024		2023
Components of Net Periodic Benefit (Income) Cost
Service cost	$	8,118	$	9,214	$	7,587	$	124	$	176	$	214
Interest cost	24,178		23,307		23,775		1,104		994		1,090
Expected return on plan assets	(48,030)		(42,832)		(39,639)		—		—		—

Amortization of prior service cost (credit)	650		142		161		—		(184)		(245)
Recognized net actuarial losses	1,091		1,103		186		651		460		550
Settlement/curtailment loss	17		919		15		—		—		—

Net periodic benefit (income) cost(a)	$	(13,976)	$	(8,147)	$	(7,915)	$	1,879	$	1,446	$	1,609
(a) Components of net periodic benefit (income) cost other than service cost are included in the line item Other income, net, and service costs are included in the line items Cost of products sold and Selling, general and administrative in the Consolidated Statements of Income.

The Company utilizes a spot rate approach, which discounts the individual plan specific expected cash flows underlying the service and interest cost using the applicable spot rates derived from a yield curve used in the determination of the benefit obligation to the relevant projected cash flows. For plans where the discount rate is not derived from plan specific expected cash flows, the Company uses a single weighted-average discount rate derived from the yield curve used to measure the projected benefit obligation at the beginning of the period for measuring both the projected benefit obligations and the service and interest cost components of net periodic benefit cost for pension and other post-retirement benefits.

Information for pension plans with an accumulated benefit obligation in excess of plan assets:


	Pension Benefits
(In thousands)	2025		2024
Aggregate accumulated benefit obligations (ABO)	$	128,023	$	117,299

Aggregate fair value of plan assets	2,416		3,334

Information for pension plans with a projected benefit obligation in excess of plan assets:


	Pension Benefits
(In thousands)	2025		2024

Aggregate projected benefit obligations (PBO)	$	132,646	$	122,092
Aggregate fair value of plan assets	2,416		3,334


	Pension Benefits				Other Benefits
	2025		2024		2025		2024
Assumptions used to determine benefit obligations
Average discount rate	5.37	%	5.35	%	5.09	%	5.49	%
Rate of compensation increase	2.97	%	2.96	%	3.00	%	3.00	%
Assumptions used to determine net periodic benefit cost
Average discount rate - Service cost	5.75	%	5.02	%	5.65	%	4.96	%
Average discount rate - Interest cost	5.07	%	4.64	%	5.22	%	4.85	%
Expected return on plan assets	8.05	%	7.23	%	—		—
Rate of compensation increase	2.96	%	3.78	%	3.00	%	3.00	%

Discount rates for all U.S. and foreign plans were determined using the aforementioned spot rate methodology for 2025 and 2024. Aside from sovereign bonds used in Mexico, the remaining plans' discount rates were determined using various corporate bonds and by matching our projected benefit obligation payment stream to current yields on high quality bonds.

The expected return on assets for the 2025 net periodic pension cost was determined by multiplying the expected returns of each asset class (based on capital market expectations) by the expected percentage of the total portfolio invested in that asset class. A total return was determined by summing the expected returns over all asset classes.


	Pension Plan Assets at December 31,
	2025		2024
Equity securities	59	%	65	%
Fixed income securities	33		26
Pooled investment funds	7		7
Cash and cash equivalents	1		1
Insurance contracts	—		1
Total	100	%	100	%

The overall objective of our pension investment strategy is to earn a rate of return over time to satisfy the benefit obligations of the pension plans and to maintain sufficient liquidity to pay benefits and meet other cash requirements of our pension funds. Investment policies for our primary U.S. pension plan are determined by the plan’s Investment Committee and set forth in the plan’s investment policy. Asset managers are granted discretion for determining sector mix, selecting securities and timing transactions, subject to the guidelines of the investment policy. An aggressive, flexible management of the portfolio is permitted and encouraged, with shifts of emphasis among equities, fixed income securities and cash equivalents at the discretion of each manager. No target asset allocations are set forth in the investment policy. For our non-U.S. pension plans, our investment objective is generally met through the use of pooled investment funds and insurance contracts.

The fair values of the Company's pension plan assets are determined using NAV as a practical expedient, or by information categorized in the fair value hierarchy level based on the inputs used to determine fair value, as further discussed in Note 20—Fair Value Measurements.

The fair values of the Company's pension plan assets at December 31, 2025, were as follows:


					Fair Value
(In thousands)	Total		NAV		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Equity securities	$	374,848	$	59,938	$	314,910	$	—	$	—
Fixed income securities	210,277		—		129,420		80,857		—
Pooled investment funds	44,630		44,630		—		—		—
Cash and cash equivalents	6,792		4,403		2,389		—		—
Insurance contracts	2,416		—		—		2,416		—
Total	$	638,963	$	108,971	$	446,719	$	83,273	$	—

The fair values of the Company's pension plan assets at December 31, 2024, were as follows:


					Fair Value
(In thousands)	Total		NAV		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Equity securities	$	375,001	$	56,803	$	318,198	$	—	$	—
Fixed income securities	152,258		—		97,013		55,245		—
Pooled investment funds	42,182		42,182		—		—		—
Cash and cash equivalents	7,589		5,908		1,681		—		—
Insurance contracts	3,334		—		—		—		3,334
Total	$	580,364	$	104,893	$	416,892	$	55,245	$	3,334

Equity securities consist primarily of publicly traded U.S. and non-U.S. common stocks. Equities are valued at closing prices reported on the listing stock exchange.

Fixed income securities consist primarily of U.S. government and agency bonds and U.S. corporate bonds. Fixed income securities are valued at closing prices reported in active markets or based on yields currently available on comparable securities of issuers with similar credit ratings. When quoted prices are not available for identical or similar bonds, the bond is valued under a discounted cash flow approach that maximizes observable inputs, such as current yields of similar instruments, and may include adjustments, for certain risks that may not be observable, such as credit and liquidity risks.

A financial instrument's categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Pooled investment funds consist of mutual and collective investment funds that invest primarily in publicly traded equity and fixed income securities. Pooled investment funds are valued using the NAV provided by the administrator of the fund. The NAV is based on the value of the underlying assets owned by the fund, minus its liabilities, divided by the number of shares outstanding. The underlying securities are generally valued at closing prices reported in active markets, quoted prices of similar securities, or discounted cash flows approach that maximizes observable inputs such as current value measurement at the reporting date. These investments are not classified in the fair value hierarchy in accordance with guidance in ASU 2015-07.

Insurance contracts are valued in accordance with the terms of the applicable collective pension contract.

Cash equivalents consist primarily of money market and similar temporary investment funds. Cash equivalents are valued at closing prices reported in active markets.

The preceding methods may produce fair value measurements that are not indicative of net realizable value or reflective of future fair values. Although we believe the valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.

We expect to make net contributions between $8 million and $10 million to our pension plans in 2026, which are primarily associated with statutorily required plans in the International reportable segment.

For the 2025 beginning of the year measurement purposes (net periodic benefit expense), a 7.8% increase in the costs of covered health care benefits was assumed, decreasing by 0.3% for each successive year to 4.5% in 2034 and thereafter. For the 2025 end of the year measurement purposes (benefit obligation), an 8.0% increase in the costs of covered health care benefits was assumed, decreasing by approximately 0.4% for each successive year to 4.5% in 2035 and thereafter.

Expense for defined contribution pension plans was $14.1 million in 2025, $13.6 million in 2024 and $13.4 million in 2023.

Estimated pension benefits to be paid under our defined benefit pension plans during the next five years are $31.2 million in 2026, $31.7 million in 2027, $32.2 million in 2028, $32.8 million in 2029 and $33.6 million in 2030, and an aggregated $174.4 million for the five years thereafter. Estimated other post-retirement benefits to be paid during the next five years are $2.0 million in 2026, $2.1 million in 2027, $2.1 million in 2028, $2.1 million in 2029, $2.2 million in 2030, and an aggregated $9.1 million for the five years thereafter.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Goodwill and Intangible Assets - Schedule of Changes in Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Balance at January 1	$ 620,895	$ 627,534
Additions and measurement period adjustments (Note 15)	91,616	0
Currency translation	19,081	(6,639)
Balance at December 31	$ 731,592	$ 620,895

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

Leases (Tables)

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Components of Lease Cost

As a lessee, we have various operating lease agreements primarily related to real estate, vehicles and office and plant equipment. The components of lease expense were as follows:


			Year Ended December 31,
(In millions, except percentage and year amounts)			2025			2024
Lease cost:
	Operating lease cost recognized as rent expense		$	16.0		$	13.7
	Total lease cost		$	16.0		$	13.7

		Other Information
Cash paid for amounts included in the measurement of lease liabilities:
	Operating cash flows related to operating leases		$	16.1		$	13.5
Non-cash other information:
	Right-of-use assets obtained in exchange for new operating lease liabilities		$	10.0		$	12.2
	Right-of-use assets obtained in acquisitions		0.8			—

			December 31,
			2025			2024
Weighted-average remaining lease term (in years):
	Operating leases		10			11
Weighted-average discount rate:
	Operating leases		3.97		%	3.81		%

Future Lease Payments

At December 31, 2025, future lease payments under operating leases were as follows:



(In millions)	Operating Leases

2026	$	15.2
2027	11.9
2028	9.3
2029	7.0
2030	4.5
After 2030	21.4
	$	69.3
Less: Imputed interest	9.9
Present value of operating lease liabilities	59.4
Less: Current portion operating lease liabilities(a)	13.2
Noncurrent operating lease liabilities	$	46.2
(a) Included in Other current liabilities on the Consolidated Balance Sheets.

Segment Information (Tables)

12 Months Ended

Dec. 31, 2025

Segment Reporting [Abstract]

Schedule of Reportable Segment Information

Reportable segment information is presented in the following table:


(In thousands)	Americas		International		Corporate/Reconciling Items(a)			Consolidated Totals
2025
Net sales to external customers	$	1,261,841	$	612,973	$	—		$	1,874,814
Less:
Cost of products sold	644,402		346,683		—
Selling, general and administrative	214,011		146,364		43,412
Research and development	38,670		26,674		—
Adjusted operating income	$	364,758	$	93,252


Noncash items:
Depreciation and amortization	47,530		22,864		1,197			$	71,591
Pension (income) expense	(17,799)		3,823		—			(13,976)
Total Assets	1,621,335		935,830		(2,791)		(b)	2,554,374
Capital expenditures	34,479		13,804		20,155			68,438
2024
Net sales to external customers	$	1,246,641	$	561,499	$	—		$	1,808,140
Less:
Cost of products sold	618,019		320,502		—
Selling, general and administrative	208,753		129,683		50,385
Research and development	39,783		26,743		—
Adjusted operating income	$	380,086	$	84,571









Noncash items:
Depreciation and amortization	46,289		17,164		880			64,333
Pension (income) expense	(11,854)		3,707		—			(8,147)
Total Assets	1,480,124		682,816		42,844			2,205,784
Capital expenditures	31,546		19,091		3,586			54,223
2023
Net sales to external customers	$	1,235,594	$	552,053	$	—		$	1,787,647
Less:
Cost of products sold	619,948		306,443		(128)
Selling, general and administrative	215,236		128,720		51,724
Research and development	40,793		27,191		4







Adjusted operating income	$	359,617	$	89,699

Noncash items:
Depreciation and amortization	44,170		15,760		843			60,773
Pension (income) expense	(11,873)		3,958		—			(7,915)
Total Assets	1,433,244		734,856		2,050			2,170,150
Capital expenditures	28,011		13,341		1,412			42,764
(a) Corporate/Reconciling items consist primarily of corporate expenses and other items not directly attributable to reportable segments. (b) Negative Corporate and reconciling items assets driven primarily by bank overdrafts under our notional cash pooling arrangement. Refer to Note 3—Cash and Cash Equivalents for further details.

Reconciliation of Total Adjusted Operating Income to Income Before Income Taxes

A reconciliation of total Adjusted operating income from reportable segments to Income before income taxes is presented in the following table:


(In thousands)	2025		2024		2023













Adjusted operating income	$	458,010	$	464,657	$	449,316
Less:
Corporate Expenses	43,412		50,385		51,600
Restructuring charges (Note 4)	3,897		6,397		9,892
Currency exchange losses, net	15,801		3,638		17,079
Interest expense	31,799		36,889		46,733
Other income, net (Note 17)	(26,379)		(22,718)		(22,101)
Acquisition-related amortization	12,615		9,174		9,246
Transaction costs(a)	10,467		886		965
Net cost for product-related legal matter	—		5,000		—
Loss on divestiture of MSA LLC (Note 21)	—		—		129,211
Product liability expense (Note 21)	—		—		3
Income before income taxes	$	366,398	$	375,006	$	206,688
(a)Transaction costs include advisory, legal, accounting, valuation, and other professional or consulting fees incurred during our evaluation of or in connection with acquisitions and divestitures. These costs are included in Selling, general and administrative expense in the Consolidated Statements of Operations.

Schedule of Geographic Information on Net Sales

Geographic information on Net sales to external customers, based on country of origin:


(In thousands)	2025		2024		2023
United States	$	943,363	$	954,979	$	961,062
Other	931,451		853,161		826,585
Total	$	1,874,814	$	1,808,140	$	1,787,647

Schedule of Geographic Information on Tangible Long-Lived Assets

Geographic information on tangible long-lived assets, net, based on country of origin:


(In thousands)	2025		2024		2023
United States	$	177,507	$	160,760	$	156,937


Germany	65,230		17,198		18,596
United Kingdom	28,627		30,274		24,740
Other	68,629		59,716		64,902
Total	$	339,993	$	267,948	$	265,175

Schedule of Net Sales by Product Group

Total Net sales by product category was as follows:


2025	Consolidated			Americas			International
(In thousands)	Dollars		Percent	Dollars		Percent	Dollars		Percent
Detection (a)	$	763,393	41%	$	501,784	40%	$	261,609	43%
Fire Service (b)	647,474		34%	446,245		35%	201,229		33%
Industrial PPE and Other (c)	463,947		25%	313,812		25%	150,135		24%
Total	$	1,874,814	100%	$	1,261,841	100%	$	612,973	100%

2024	Consolidated			Americas			International
(In thousands)	Dollars		Percent	Dollars		Percent	Dollars		Percent
Detection (a)	$	642,792	36%	$	426,839	34%	$	215,953	38%
Fire Service (b)	712,684		39%	507,738		41%	204,946		36%
Industrial PPE and Other (c)	452,664		25%	312,064		25%	140,600		26%
Total	$	1,808,140	100%	$	1,246,641	100%	$	561,499	100%

2023	Consolidated			Americas			International
(In thousands)	Dollars		Percent	Dollars		Percent	Dollars		Percent
Detection (a)	$	634,915	36%	$	419,312	34%	$	215,603	39%
Fire Service (b)	684,224		38%	501,676		41%	182,548		33%
Industrial PPE and Other (c)	468,508		26%	314,606		25%	153,902		28%
Total	$	1,787,647	100%	$	1,235,594	100%	$	552,053	100%
(a) Detection includes Fixed Gas and Flame Detection and Portable Gas Detection. Detection includes sales from the M&C acquisition from May 6th, 2025 onward (Americas and International). Refer to Note 15—Acquisitions for further information. (b) Fire Service includes Breathing Apparatus and Firefighter Helmets and Protective Apparel. (c) Industrial PPE and Other includes Industrial Head Protection, Fall Protection and other.

Cash and Cash Equivalents (Tables)

12 Months Ended

Dec. 31, 2025

Cash and Cash Equivalents [Abstract]

Schedule of Cash and Cash Equivalents

The Company's net cash pool position consisted of the following:


(In thousands)	December 31, 2025
Gross cash pool position	$	86,392
Less: cash pool borrowings	(83,118)
Net cash pool position	$	3,274

Pensions and Other Post-retirement Benefits - Components of Net Periodic Benefit Cost (Credit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 8,118	$ 9,214	$ 7,587
Interest cost	24,178	23,307	23,775
Expected return on plan assets	(48,030)	(42,832)	(39,639)
Amortization of prior service cost (credit)	650	142	161
Recognized net actuarial losses	1,091	1,103	186
Settlement/curtailment loss	17	919	15
Net periodic benefit cost	(13,976)	(8,147)	(7,915)
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	124	176	214
Interest cost	1,104	994	1,090
Expected return on plan assets	0	0	0
Amortization of prior service cost (credit)	0	(184)	(245)
Recognized net actuarial losses	651	460	550
Settlement/curtailment loss	0	0	0
Net periodic benefit cost	$ 1,879	$ 1,446	$ 1,609

Other Income, Net (Tables)

12 Months Ended

Dec. 31, 2025

Other Income and Expenses [Abstract]

Schedule of Other Income, Net


	Year ended December 31,
(In thousands)	2025		2024		2023
Components of net periodic benefit income other than service cost (Note 16)	$	20,339	$	16,091	$	14,107
Interest income (a)	5,861		7,019		8,184
Rental income	1,389		65		63
Loss on asset write-down and dispositions, net	(1,408)		(819)		(173)
Other, net	198		362		(80)


Total other income, net	$	26,379	$	22,718	$	22,101
(a) Primarily interest earned on cash balances

Other Income, Net

12 Months Ended

Dec. 31, 2025

Other Income and Expenses [Abstract]

Other Income, Net


	Year ended December 31,
(In thousands)	2025		2024		2023
Components of net periodic benefit income other than service cost (Note 16)	$	20,339	$	16,091	$	14,107
Interest income (a)	5,861		7,019		8,184
Rental income	1,389		65		63
Loss on asset write-down and dispositions, net	(1,408)		(819)		(173)
Other, net	198		362		(80)


Total other income, net	$	26,379	$	22,718	$	22,101
(a) Primarily interest earned on cash balances

Stock Plans - Schedule of Stock Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (Note 12)	$ 15,197	$ 18,185	$ 30,023
Income tax benefit	3,632	4,492	7,356
Total stock-compensation expense, net of income tax benefit	11,565	13,693	22,667
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (Note 12)	9,979	11,239	8,062
Performance stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (Note 12)	4,862	6,760	21,961
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (Note 12)	$ 356	$ 186	$ 0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
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-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 25: http://www.xbrl.org/2003/role/disclosureRef
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Reference 26: http://www.xbrl.org/2003/role/disclosureRef
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Reference 27: http://www.xbrl.org/2003/role/disclosureRef
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Reference 28: http://www.xbrl.org/2003/role/disclosureRef
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Reference 29: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Acquisitions (Tables)

12 Months Ended

Dec. 31, 2025

Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]

Schedule of Preliminary Fair Values of the Assets Acquired and Liabilities Assumed

The following table summarizes the preliminary fair values of the M&C’s assets acquired and liabilities assumed at the date of the acquisition:


(In millions)	May 6, 2025
Current assets (including cash of $10.0)	$	38.8
Property, plant and equipment and other noncurrent assets	50.0
Customer relationships and other intangible assets	66.6


Goodwill	91.6

Total assets acquired	$	247.0
Deferred tax liability	(24.9)
Other liabilities	(22.8)
Total liabilities assumed	$	(47.7)
Net assets acquired	$	199.3

Pro Forma Financial Information

The following unaudited pro forma information presents our combined results as if the M&C acquisition had occurred on January 1, 2024. The unaudited pro forma financial information was prepared to give effect to events that are (1) directly attributable to the acquisition; (2) factually supportable; and (3) expected to have a continuing impact on the combined Company's results. There were no material transactions between MSA and M&C during the periods presented that are required to be eliminated in the unaudited pro forma condensed combined financial information. The unaudited pro forma condensed combined financial information does not reflect any cost savings, operating synergies, or revenue enhancements that the combined companies may achieve as a result of the acquisition or the costs to integrate the operations or the costs necessary to achieve cost savings, operating synergies, or revenue enhancements.



(In millions, except per share amounts)	2025		2024
Net sales	$	1,893.3	$	1,860.8
Net income	$	281.4	$	291.9
Basic earnings per share	$	7.17	$	7.41
Diluted earnings per share	$	7.15	$	7.38

Income Taxes - Income Taxes Paid (Details) $ in Thousands	12 Months Ended
Income Taxes - Income Taxes Paid (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Income Tax Paid, by Individual Jurisdiction [Line Items]
Income Tax Paid, Federal, after Refund Received	$ 48,993
Income Tax Paid, State and Local, after Refund Received	11,798
Income Taxes Paid, Net	101,605
Brazil
Income Tax Paid, by Individual Jurisdiction [Line Items]
Income Tax Paid, Foreign, after Refund Received	7,900
Switzerland
Income Tax Paid, by Individual Jurisdiction [Line Items]
Income Tax Paid, Foreign, after Refund Received	7,372
Germany
Income Tax Paid, by Individual Jurisdiction [Line Items]
Income Tax Paid, Foreign, after Refund Received	5,375
Other
Income Tax Paid, by Individual Jurisdiction [Line Items]
Income Tax Paid, Foreign, after Refund Received	$ 20,167

Fair Value Measurements (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Carrying amount of long-term debt	$ 299.3	$ 303.5
Fair value of long-term debt	$ 272.5	$ 266.4

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 4: http://www.xbrl.org/2003/role/exampleRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 9: http://www.xbrl.org/2003/role/exampleRef
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-URI https://asc.fasb.org/1943274/2147482881/825-10-55-12

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Pensions and Other Post-retirement Benefits - Summary of Pension Plan Assets Measured at Fair Value on Recurring Basis by Fair Value Hierarchy (Detail) - Pension Plan - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Total	$ 638,963	$ 580,364	$ 563,449
Fair Value, Measurements, Recurring
Defined Benefit Plan Disclosure [Line Items]
Total	638,963	580,364
NAV	108,971	104,893
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total	446,719	416,892
Fair Value, Measurements, Recurring \| Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total	83,273	55,245
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total	0	3,334
Fair Value, Measurements, Recurring \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total	374,848	375,001
NAV	59,938	56,803
Fair Value, Measurements, Recurring \| Equity securities \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total	314,910	318,198
Fair Value, Measurements, Recurring \| Equity securities \| Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Fair Value, Measurements, Recurring \| Equity securities \| Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Fair Value, Measurements, Recurring \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Total	210,277	152,258
NAV	0	0
Fair Value, Measurements, Recurring \| Fixed income securities \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total	129,420	97,013
Fair Value, Measurements, Recurring \| Fixed income securities \| Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total	80,857	55,245
Fair Value, Measurements, Recurring \| Fixed income securities \| Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Fair Value, Measurements, Recurring \| Pooled investment funds
Defined Benefit Plan Disclosure [Line Items]
Total	44,630	42,182
NAV	44,630	42,182
Fair Value, Measurements, Recurring \| Pooled investment funds \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Fair Value, Measurements, Recurring \| Pooled investment funds \| Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Fair Value, Measurements, Recurring \| Pooled investment funds \| Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Fair Value, Measurements, Recurring \| Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Total	2,416	3,334
NAV	0	0
Fair Value, Measurements, Recurring \| Insurance contracts \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Fair Value, Measurements, Recurring \| Insurance contracts \| Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total	2,416	0
Fair Value, Measurements, Recurring \| Insurance contracts \| Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total	0	3,334
Fair Value, Measurements, Recurring \| Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total	6,792	7,589
NAV	4,403	5,908
Fair Value, Measurements, Recurring \| Cash and cash equivalents \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total	2,389	1,681
Fair Value, Measurements, Recurring \| Cash and cash equivalents \| Significant Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total	0	0
Fair Value, Measurements, Recurring \| Cash and cash equivalents \| Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total	$ 0	$ 0

Fair Value Measurements	12 Months Ended
Fair Value Measurements	Dec. 31, 2025
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value hierarchy consists of three broad levels, which gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The three levels of the fair value hierarchy are: Level 1—Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets. Level 2—Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 3—Unobservable inputs for the asset or liability. The valuation methodologies we used to measure financial assets and liabilities were limited to the pension plan assets and the derivative financial instruments described in Note 16—Pensions and Other Post-retirement Benefits and Note 19—Derivative Financial Instruments, respectively. Valuations of these financial assets and liabilities may reflect assumptions about financial markets which may change based on economic conditions. See Note 16 for the fair value hierarchy classification of pension plan assets. We estimate the fair value of the derivative financial instruments, consisting of foreign currency forward contracts, based upon valuation models with inputs that generally can be verified by observable market conditions and do not involve significant management judgment. Accordingly, the fair values of the derivative financial instruments are classified within Level 2 of the fair value hierarchy. With the exception of our fixed rate long-term debt, we believe that the reported carrying amounts of our remaining financial assets and liabilities approximate their fair values. The reported carrying amount of fixed rate long-term debt, including the current portion of long-term debt, was $299.3 million and $303.5 million at December 31, 2025, and 2024, respectively. The fair value of this debt was $272.5 million and $266.4 million at December 31, 2025, and 2024, respectively. The fair value of this debt was determined using Level 2 inputs by evaluating similarly rated companies with publicly traded bonds where available or current borrowing rates available for financings with similar terms and

Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,143,319
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	(764)	$ (1,200)	$ 101
Unrealized gains on available-for-sale securities (Note 20)	0	0	2
Foreign currency translation adjustments	99,868	(12,400)	29,468
Balance at end of period	1,367,012	1,143,319
Accumulated defined benefit plans adjustment attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(11,390)	(42,652)	(50,335)
Tax expense	(10,095)	(9,579)	(1,514)
Total other comprehensive gain before reclassifications, net of tax	30,773	29,470	7,140
Tax benefit	(608)	(648)	(185)
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	1,801	1,792	543
Foreign currency translation adjustments	32,574	31,262	7,683
Balance at end of period	21,184	(11,390)	(42,652)
Accumulated defined benefit plans adjustment, net prior service attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Amounts reclassified from Accumulated other comprehensive loss	650	(42)	(84)
Accumulated defined benefit plans adjustment, net gain (loss) attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Unrecognized net actuarial gains	40,868	39,049	8,654
Amounts reclassified from Accumulated other comprehensive loss	1,759	2,482	812
Accumulated net investment gain (loss) attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	0	0	(2)
Unrealized gains on available-for-sale securities (Note 20)	0	0	2
Balance at end of period	0	0	0
Accumulated foreign currency adjustment attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(130,259)	(86,597)	(108,380)
Total amount reclassified from accumulated other comprehensive loss, net of tax, into net income	(764)	(1,200)	101
Foreign currency translation adjustments	68,273	(42,462)	21,682
Balance at end of period	(62,750)	(130,259)	(86,597)
Accumulated foreign currency forward cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	0	0	0
Unrealized losses on cash flow hedges (Note 19)	(215)	0	0
Balance at end of period	$ (215)	$ 0	$ 0

Long-Term Debt - Schedule of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Jun. 29, 2023	Jul. 01, 2021
Debt Instrument [Line Items]
Senior revolving credit facility maturing in 2030, net of debt issuance costs	$ 282,137	$ 0
Total	580,934	508,013
Amounts due within one year	8,225	26,391
Long-term debt, net of debt issuance costs	$ 572,709	481,622
2016 Senior Notes payable through 2031, 3.40%, net of debt issuance costs
Debt Instrument [Line Items]
Debt instrument, stated interest rate percentage	3.40%
Senior notes payable	$ 49,278	53,400
2021 Senior Notes payable through 2036, 2.69%, net of debt issuance costs
Debt Instrument [Line Items]
Debt instrument, stated interest rate percentage	2.69%
Senior notes payable	$ 99,776	99,754
2021 Senior Notes payable through 2036, 2.69%, net of debt issuance costs \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate percentage				2.69%
2021 Senior Notes payable through 2036, 2.69%, net of debt issuance costs
Debt Instrument [Line Items]
Debt instrument, stated interest rate percentage	2.69%
Senior notes payable	$ 99,776	99,754
2021 Senior Notes payable through 2036, 2.69%, net of debt issuance costs \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate percentage				2.69%
2023 Term Loan credit agreement maturing in 2026, net of debt issuance costs \| Secured Debt \| Line of Credit
Debt Instrument [Line Items]
Total	$ 0	205,152
2023 Senior Notes payable through 2028, 5.25%, net of debt issuance costs \| Senior Notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate percentage	5.25%		5.25%
Total	$ 49,967	$ 49,953

Stock Plans - Summary of Restricted Stock Activity (Detail) - Restricted stock - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Shares
Beginning balance (in shares)	179,584	173,851	145,886
Granted (in shares)	73,130	84,282	81,150
Vested (in shares)	(69,704)	(50,840)	(43,107)
Forfeited (in shares)	(14,623)	(27,709)	(10,078)
Ending balance (in shares)	168,387	179,584	173,851
Weighted Average Grant Date Fair Value
Beginning balance (in dollars per share)	$ 150.39	$ 142.73	$ 137.36
Granted (in dollars per share)	160.33	178.50	142.92
Vested (in dollars per share)	138.75	163.66	126.27
Forfeited (in dollars per share)	152.04	163.49	140.28
Ending balance (in dollars per share)	$ 159.38	$ 150.39	$ 142.73

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Intangible Asset, Acquired, Finite-Lived [Line Items]
Goodwill	$ 731,592	$ 620,895	$ 627,534
Trade Names [Member] \| Globe Holding Company LLC
Intangible Asset, Acquired, Finite-Lived [Line Items]
Indefinite-lived intangible assets	60,000
Intangible Assets
Intangible Asset, Acquired, Finite-Lived [Line Items]
Future amortization expense, year one	21,900
Future amortization expense, year two	21,700
Future amortization expense, year three	21,300
Future amortization expense, year four	20,600
Future amortization expense, year five	18,300
Americas
Intangible Asset, Acquired, Finite-Lived [Line Items]
Goodwill	481,400
International
Intangible Asset, Acquired, Finite-Lived [Line Items]
Goodwill	$ 250,200

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Dec. 31, 2025
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Leases

12 Months Ended

Dec. 31, 2025

Leases [Abstract]

Leases

As a lessee, we have various operating lease agreements primarily related to real estate, vehicles and office and plant equipment. The components of lease expense were as follows:


			Year Ended December 31,
(In millions, except percentage and year amounts)			2025			2024
Lease cost:
	Operating lease cost recognized as rent expense		$	16.0		$	13.7
	Total lease cost		$	16.0		$	13.7

		Other Information
Cash paid for amounts included in the measurement of lease liabilities:
	Operating cash flows related to operating leases		$	16.1		$	13.5
Non-cash other information:
	Right-of-use assets obtained in exchange for new operating lease liabilities		$	10.0		$	12.2
	Right-of-use assets obtained in acquisitions		0.8			—

			December 31,
			2025			2024
Weighted-average remaining lease term (in years):
	Operating leases		10			11
Weighted-average discount rate:
	Operating leases		3.97		%	3.81		%

Rent expense was $16.0 million, $13.7 million and $12.0 million in 2025, 2024 and 2023, respectively. We did not have any lease transactions with related parties. We did not have any significant leases not yet commenced.

At December 31, 2025, future lease payments under operating leases were as follows:



(In millions)	Operating Leases

2026	$	15.2
2027	11.9
2028	9.3
2029	7.0
2030	4.5
After 2030	21.4
	$	69.3
Less: Imputed interest	9.9
Present value of operating lease liabilities	59.4
Less: Current portion operating lease liabilities(a)	13.2
Noncurrent operating lease liabilities	$	46.2
(a) Included in Other current liabilities on the Consolidated Balance Sheets.

Leases

As a lessee, we have various operating lease agreements primarily related to real estate, vehicles and office and plant equipment. The components of lease expense were as follows:


			Year Ended December 31,
(In millions, except percentage and year amounts)			2025			2024
Lease cost:
	Operating lease cost recognized as rent expense		$	16.0		$	13.7
	Total lease cost		$	16.0		$	13.7

		Other Information
Cash paid for amounts included in the measurement of lease liabilities:
	Operating cash flows related to operating leases		$	16.1		$	13.5
Non-cash other information:
	Right-of-use assets obtained in exchange for new operating lease liabilities		$	10.0		$	12.2
	Right-of-use assets obtained in acquisitions		0.8			—

			December 31,
			2025			2024
Weighted-average remaining lease term (in years):
	Operating leases		10			11
Weighted-average discount rate:
	Operating leases		3.97		%	3.81		%

At December 31, 2025, future lease payments under operating leases were as follows:



(In millions)	Operating Leases

2026	$	15.2
2027	11.9
2028	9.3
2029	7.0
2030	4.5
After 2030	21.4
	$	69.3
Less: Imputed interest	9.9
Present value of operating lease liabilities	59.4
Less: Current portion operating lease liabilities(a)	13.2
Noncurrent operating lease liabilities	$	46.2
(a) Included in Other current liabilities on the Consolidated Balance Sheets.

Long-Term Debt

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Long-Term Debt


	December 31,
(In thousands)	2025		2024
2016 Senior Notes payable through 2031, 3.40%, net of debt issuance costs	$	49,278	$	53,400
2021 Senior Notes payable through 2036, 2.69%, net of debt issuance costs	99,776		99,754
2021 Senior Notes payable through 2036, 2.69%, net of debt issuance costs	99,776		99,754
Senior revolving credit facility maturing in 2030, net of debt issuance costs	282,137		—
2023 Term Loan credit agreement maturing in 2026, net of debt issuance costs	—		205,152
2023 Senior Notes payable through 2028, 5.25%, net of debt issuance costs	49,967		49,953
Total	580,934		508,013
Amounts due within one year	8,225		26,391
Long-term debt, net of debt issuance costs	$	572,709	$	481,622

On April 1, 2025, the Company entered into a Fifth Amended and Restated Credit Agreement (the “Revolving Credit Facility" or "Facility”) with a capacity of $1.3 billion. Under the amended agreement, the Company may elect either a Base rate of interest (“BASE”) or an interest rate based on Secured Overnight Financing Rate (“SOFR”). The BASE is a daily fluctuating per annum rate equal to the highest of (i) the Overnight Bank Funding Rate, plus 0.5%, (ii) the Prime Rate (iii) the Daily Simple SOFR rate, plus 1.00%. The Company pays a credit spread of 0 to 175 basis points based on the Company’s net leverage ratio and elected rate (BASE or SOFR). The Company has a weighted average revolver interest rate of 4.56% as of December 31, 2025. At December 31, 2025, $1.0 billion of the existing $1.3 billion Revolving Credit Facility was unused, including letters of credit issued under the facility. The facility also provides an accordion feature that allows the Company to access an additional $500.0 million of capacity pending approval by MSA’s board of directors and from the bank group.

On July 1, 2024, the Company entered into Amendment No. 3 to the Third Amended and Restated Multi-Currency Note Purchase and Private Shelf Agreement (the “Prudential Note Agreement”) with PGIM, Inc. (“Prudential”). The Prudential Note Agreement provided for (i) the issuance of $100.0 million of 2.69% Series C Senior Notes due July 1, 2036 and (ii) the establishment of an uncommitted note issuance facility whereby the Company may request, subject to Prudential’s acceptance in its sole discretion, the issuance of up to $335.0 million aggregate principal amount of senior unsecured notes. The Company has outstanding £36.6 million (approximately $49.3 million at December 31, 2025) of 3.4% Series B Senior Notes due January 22, 2031. Remaining maturities of this note are £6.1 million (approximately $8.2 million at December 31, 2025) due annually through January 2031.

On July 1, 2024, the Company entered into Amendment No. 3 to the Second Amended and Restated Master Note Facility (the “NYL Note Facility”) with NYL Investors. The NYL Note Facility provided for (i) the issuance of $100.0 million of 2.69% Series A Senior Notes due July 1, 2036 and (ii) the establishment of an uncommitted note issuance facility whereby the Company may request, subject to NYL Investors’ acceptance in its sole discretion, the issuance of up to $200.0 million aggregate principal amount of senior unsecured notes.

Coincident with the amendment to the Revolving Credit Facility on April 1, 2025, the Company entered into Amendment No. 4 to the Prudential Note Agreement and Amendment No. 4 to the NYL Note Facility, in each case to conform to the changes made in the Revolving Credit Facility.

On June 29, 2023, the Company issued $50 million of 5.25% Series B Senior Notes due July 1, 2028, pursuant to the NYL Note Facility (the "Notes"). The Notes bear interest at 5.25% per annum, payable semi-annually, and mature on July 1, 2028. The Notes provide for a principal payment of $25 million on July 1, 2027, with the remaining $25 million due on July 1, 2028. The Notes may be redeemed at the Company’s option prior to their maturity at a make-whole redemption price calculated as provided in the NYL Note Facility. The proceeds of the Notes were used on June 29, 2023, to pay down an equivalent amount of borrowings under the Company’s Revolving Credit Facility with PNC Bank, National Association, as Administrative Agent.

On January 5, 2023, the Company entered into a new $250 million term loan facility (the "Term Loan Facility") to fund the divestiture of MSA LLC. In conjunction with the updated Revolving Credit Facility signed on April 1, 2025, MSA converted the balance of the Term Loan Facility to the Revolving Credit Facility, closing the Term Loan Facility. Under the agreement, the Company elected either BASE or an interest rate based on SOFR. The Company paid a credit spread of 0 to 200 basis points based on the Company's net leverage ratio and elected rate.

The Revolving Credit Facility, Prudential Note Agreement and NYL Note Facility require the Company to comply with specified financial covenants, including a requirement to maintain a minimum fixed charges coverage ratio of not less than 1.50 to 1.00 and a consolidated leverage ratio not to exceed 3.50 to 1.00; except during an acquisition period, defined as four consecutive fiscal quarters beginning with the quarter of acquisition, in which case the consolidated net leverage ratio shall not exceed 4.00 to 1.00; in each case calculated on the basis of the trailing four fiscal quarters. In addition, the agreements contain negative covenants limiting the ability of the Company and its subsidiaries to incur additional indebtedness or issue guarantees, create or incur liens, make loans and investments, make acquisitions, transfer or sell assets, enter into transactions with affiliated parties, make changes in its organizational documents that are materially adverse to lenders or modify the nature of the Company's or its subsidiaries' business.

As of December 31, 2025, MSA was in full compliance with the restrictive covenants under its various credit agreements.

Approximate maturities on our long-term debt over the next five years are $8.2 million in 2026, $33.2 million in 2027 and 2028, $8.2 million in 2029, $293.5 million in 2030 and $208.2 million thereafter.

The Company had outstanding bank guarantees and standby letters of credit with banks as of December 31, 2025, totaling $9.7 million, of which $1.5 million relate to the revolving credit facility. The letters of credit serve to cover customer requirements in connection with certain sales orders and insurance companies. The Company is also required to provide cash collateral in connection with certain arrangements. At December 31, 2025, the Company has $0.9 million of restricted cash in support of these arrangements.

On May 6, 2025, the Company acquired M&C in a transaction valued at approximately $189 million, net of cash acquired. Refer to Note 15—Acquisitions for further information. The acquisition was financed by $137.3 million under the Revolving Credit Facility and cash on hand.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482925/835-30-45-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Pension and Other Post-retirement Benefits - Pension Plans with PBO in Excess of Plan Assets (Detail) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Aggregate projected benefit obligations (PBO)	$ 132,646	$ 122,092
Aggregate fair value of plan assets	$ 2,416	$ 3,334

Stock Plans - Summary of Stock Option Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Shares
Beginning balance, outstanding (in shares)	15,018	26,536	58,156
Exercised (in shares)	(12,776)	(10,666)	(31,394)
Forfeited (in shares)	(25)	(852)	(226)
Ending balance, outstanding (in shares)	2,217	15,018	26,536
Weighted Average Exercise Price
Beginning, weighted average exercise price (in dollars per share)	$ 45.10	$ 45.95	$ 46.48
Exercised (in dollars per share)	44.53	46.93	46.90
Forfeited (in dollars per share)	54.29	48.65	49.44
Ending, weighted average exercise price (in dollars per share)	$ 48.30	$ 45.10	$ 45.95
Exercisable at year-end (in shares)	2,217	15,018	26,536

Acquisitions - Preliminary Fair Values of the Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	May 06, 2025	Dec. 31, 2024	Dec. 31, 2023
Business Combination [Line Items]
Goodwill	$ 731,592		$ 620,895	$ 627,534
Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent		$ 10,000
M&C
Business Combination [Line Items]
Current assets		38,800
Property, plant and equipment and other noncurrent assets		50,000
Finite-lived intangible assets		66,600
Goodwill		91,600
Total assets acquired		247,000
Deferred tax liability		(24,900)
Other liabilities		(22,800)
Total liabilities assumed		(47,700)
Net assets acquired		$ 199,300

Stock Plans - Schedule of Exercise Price Ranges, Characteristics of Outstanding Stock Options (Detail)	12 Months Ended
	Dec. 31, 2025 $ / shares shares
$33.01 – $45.00
Range of Exercise Prices
Range of Exercise Prices, minimum (in dollars per share)	$ 33.01
Range of Exercise Prices, maximum (in dollars per share)	$ 45.00
Stock Options Outstanding and Exercisable
Stock Options Outstanding (in shares) \| shares	500
Stock Options Outstanding, Weighted-Average Exercise Price (in dollars per share)	$ 44.50
Stock Options Outstanding, Weighted-Average Remaining Life (in years)	29 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Additional General Disclosures [Abstract]
Stock Options Exercisable (in shares) \| shares	500
Stock Options Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 44.50
Stock Options Exercisable, Weighted-Average Remaining Life (in years)	29 days
$45.01 – $57.93
Range of Exercise Prices
Range of Exercise Prices, minimum (in dollars per share)	$ 45.01
Range of Exercise Prices, maximum (in dollars per share)	$ 57.93
Stock Options Outstanding and Exercisable
Stock Options Outstanding (in shares) \| shares	1,717
Stock Options Outstanding, Weighted-Average Exercise Price (in dollars per share)	$ 49.41
Stock Options Outstanding, Weighted-Average Remaining Life (in years)	2 years 3 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Additional General Disclosures [Abstract]
Stock Options Exercisable (in shares) \| shares	1,717
Stock Options Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 49.41
Stock Options Exercisable, Weighted-Average Remaining Life (in years)	2 years 3 days
$33.01 – $57.93
Range of Exercise Prices
Range of Exercise Prices, minimum (in dollars per share)	$ 33.01
Range of Exercise Prices, maximum (in dollars per share)	$ 57.93
Stock Options Outstanding and Exercisable
Stock Options Outstanding (in shares) \| shares	2,217
Stock Options Outstanding, Weighted-Average Exercise Price (in dollars per share)	$ 48.30
Stock Options Outstanding, Weighted-Average Remaining Life (in years)	1 year 6 months 29 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Additional General Disclosures [Abstract]
Stock Options Exercisable (in shares) \| shares	2,217
Stock Options Exercisable, Weighted-Average Exercise Price (in dollars per share)	$ 48.30
Stock Options Exercisable, Weighted-Average Remaining Life (in years)	1 year 6 months 29 days

Acquisitions

12 Months Ended

Dec. 31, 2025

Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]

Acquisitions

Acquisition of M&C

On May 6, 2025, the Company acquired 100% of the common stock of M&C in an all-cash transaction valued at approximately $189 million, net of cash acquired.

Headquartered in Ratingen, Germany, M&C provides a comprehensive range of gas analysis systems that detect, measure and monitor gases in critical environments. M&C's product portfolio includes systems and solutions for gas sampling, gas conditioning, as well as advanced process control. M&C products and systems are used in a wide range of industries and applications, including energy, chemicals, utilities, manufacturing, food and beverage, and other industrial applications.

M&C’s operating results are included in our consolidated financial statements from the acquisition date within the Americas and International reportable segments. The acquisition qualified as a business combination and was accounted for using the acquisition method of accounting.

The following table summarizes the preliminary fair values of the M&C’s assets acquired and liabilities assumed at the date of the acquisition:


(In millions)	May 6, 2025
Current assets (including cash of $10.0)	$	38.8
Property, plant and equipment and other noncurrent assets	50.0
Customer relationships and other intangible assets	66.6


Goodwill	91.6

Total assets acquired	$	247.0
Deferred tax liability	(24.9)
Other liabilities	(22.8)
Total liabilities assumed	$	(47.7)
Net assets acquired	$	199.3

As of December 31, 2025, the purchase accounting for M&C is substantially complete, but subject to change based on management's continued review of estimates and assumptions reflected in preliminary valuation data or receipt of additional information related to tax balances and liabilities assumed.

Assets acquired and liabilities assumed in connection with the acquisition were recorded at their preliminary fair values. Fair values were determined by management, based in part on an independent valuation performed by a third-party valuation specialist. The valuation methods used to determine the fair value of intangible assets included the excess earnings approach for customer relationships using customer inputs and contributory charges; the relief from royalty method for trade name and developed technologies and the cost approach for assembled workforce, which is included in goodwill. Assumptions and estimates were involved in the application of these valuation methods, including forecasted sales volumes and prices, royalty rates, costs to produce, tax rates and amortization tax benefits, capital spending, discount rates, customer attrition rates, technology obsolescence assumptions and working capital changes. Cash flow forecasts were generally based on M&C pre-acquisition forecasts, coupled with estimated MSA financial synergies. Identifiable intangible assets with finite lives are subject to amortization over their estimated useful lives. The customer relationships, developed technology, and trade name acquired in the M&C transaction are being amortized over periods of 20 years, 8 years, and 20 years, respectively. Estimated future amortization expense related to the identifiable intangible assets is approximately $4 million annually for 2026 through 2030, and $43.8 million thereafter.

Goodwill was calculated as the excess of the purchase price over the fair value of net assets acquired and represents the future economic benefits arising from other assets acquired that could not be individually identified and separately recognized. Among the factors that contributed to a purchase price in excess of the fair value of the net tangible and intangible assets acquired were the acquisition of an assembled workforce, the expected synergies and other benefits that we believe will result from combining the operations of M&C with our operations. Goodwill of $91.6 million related to the M&C acquisition was recorded, with $57.9 million and $33.7 million allocated to the International and Americas reportable segments, respectively. This Goodwill is nondeductible for tax purposes.

Our results as of December 31, 2025, include strategic acquisition costs of $10.5 million, including $9.2 million related to the M&C acquisition. Our results as of December 31, 2024 and 2023, include $0.9 million and $1.0 million, respectively, of strategic acquisition costs. These costs are reported in selling, general, and administrative expenses.

The operating results of this acquisition have been included in our consolidated financial statements from the acquisition date through December 31, 2025. Our results as of December 31, 2025, include net sales and net loss of $41.0 million and $4.8 million, respectively, attributable to this acquisition.



(In millions, except per share amounts)	2025		2024
Net sales	$	1,893.3	$	1,860.8
Net income	$	281.4	$	291.9
Basic earnings per share	$	7.17	$	7.41
Diluted earnings per share	$	7.15	$	7.38

The unaudited pro forma combined financial information is presented for informational purposes only and is not intended to represent or be indicative of the combined results of operations or financial position that we would have reported had the acquisition been completed as of the date and for the periods presented, and should not be taken as representative of our consolidated results of operations or financial condition following the acquisition. In addition, the unaudited pro forma condensed combined financial information is not intended to project the future financial position or result of operations of the combined Company.

The unaudited pro forma combined financial information was prepared using the acquisition method of accounting under existing U.S. GAAP. MSA has been treated as the acquirer.

- Definition

The entire disclosure for business combination.

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+ Details

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 10,286	$ 8,047
Cumulative preferred nonvoting stock (as a percent)	4.50%	4.50%
Preferred stock, par value (in dollars per share)	$ 50,000	$ 50,000
Common stock, shares authorized (in shares)	180,000,000	180,000,000
Common stock, shares issued (in shares)	62,081,391	62,081,391
Common stock, shares outstanding (in shares)	38,912,629	39,260,080

Segment Information - Geographic Information on Sales to External Customers (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 1,874,814	$ 1,808,140	$ 1,787,647
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	943,363	954,979	961,062
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 931,451	$ 853,161	$ 826,585

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Net sales	$ 1,874,814	$ 1,808,140	$ 1,787,647
Cost of products sold	1,003,701	947,695	935,509
Gross profit	871,113	860,445	852,138
Selling, general and administrative	414,254	394,707	396,645
Research and development	65,343	66,526	67,988
Restructuring charges (Note 4)	3,897	6,397	9,892
Currency exchange losses, net	15,801	3,638	17,079
Loss on divestiture of MSA LLC (Note 21)	0	0	129,211
Product liability expense (Note 21)	0	0	3
Operating income	371,818	389,177	231,320
Interest expense	31,799	36,889	46,733
Other income, net (Note 17)	(26,379)	(22,718)	(22,101)
Total other expense, net	5,420	14,171	24,632
Income before income taxes	366,398	375,006	206,688
Provision for income taxes (Note 11)	87,474	90,039	148,105
Net income	$ 278,924	$ 284,967	$ 58,583
Earnings per share attributable to common shareholders (Note 10):
Basic (in dollars per share)	$ 7.11	$ 7.24	$ 1.49
Diluted (in dollars per share)	7.09	7.21	1.48
Dividends per common share (in dollars per share)	$ 2.10	$ 2.00	$ 1.87

Earnings per Share

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Earnings per Share

Basic earnings per share attributable to MSA Safety Incorporated common shareholders is computed by dividing net income, after the deduction of preferred stock dividends and undistributed earnings allocated to participating securities, by the weighted average number of common shares outstanding during the period. Diluted earnings per share assumes the issuance of common stock for all potentially dilutive share equivalents outstanding not classified as participating securities. Participating securities are defined as unvested stock-based compensation awards that contain nonforfeitable rights to dividends.


(In thousands, except per share amounts)	2025		2024		2023
Net income	$	278,924	$	284,967	$	58,583
Preferred stock dividends	(41)		(41)		(41)
Net income available to common equity	278,883		284,926		58,542
Dividends and undistributed earnings allocated to participating securities	(26)		(24)		(26)
Net income available to common shareholders	$	278,857	$	284,902	$	58,516







Basic weighted-average shares outstanding	39,216		39,371		39,307
Stock options and other stock-based awards	130		164		166
Diluted weighted-average shares outstanding	39,346		39,535		39,473
Antidilutive stock-based awards	—		—		—

Earnings per share:
Basic	$	7.11	$	7.24	$	1.49
Diluted	$	7.09	$	7.21	$	1.48

Derivative Financial Instruments - Balance Sheet Location And Fair Value Of Assets And Liabilities Associated With Derivative Financial Instruments (Detail) - Foreign exchange contracts: currency exchange losses, net - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Foreign exchange contracts: prepaid expenses and other current assets	$ 0	$ 175
Foreign exchange contracts: other current liabilities	392	1,111
Foreign exchange contracts: prepaid expenses and other current assets	105	0
Foreign exchange contracts: other current liabilities	$ 320	$ 0

Goodwill and Intangible Assets - Net Carrying Amount (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	19 years
Gross Carrying Amount	$ 409.0	$ 337.3
Accumulated Amortization	(169.9)	(150.9)
Net Carrying Amount	$ 239.1	186.4
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	20 years
Gross Carrying Amount	$ 232.2	179.7
Accumulated Amortization	(69.9)	(55.7)
Net Carrying Amount	$ 162.3	124.0
Distribution agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	20 years
Gross Carrying Amount	$ 65.7	65.7
Accumulated Amortization	(36.4)	(33.3)
Net Carrying Amount	$ 29.3	32.4
Technology related assets
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	9 years
Gross Carrying Amount	$ 59.4	49.6
Accumulated Amortization	(39.7)	(35.5)
Net Carrying Amount	$ 19.7	14.1
Patents, trademarks and copyrights
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	19 years
Gross Carrying Amount	$ 48.6	34.1
Accumulated Amortization	(21.0)	(18.2)
Net Carrying Amount	$ 27.6	15.9
Other
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life (years)	3 years
Gross Carrying Amount	$ 3.1	2.8
Accumulated Amortization	(2.9)	(2.8)
Net Carrying Amount	$ 0.2	$ 0.0

Other Income, Net - Schedule of Other Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Income and Expenses [Abstract]
Components of net periodic benefit income other than service cost (Note 16)	$ 20,339	$ 16,091	$ 14,107
Interest income (a)	5,861	7,019	8,184
Rental income	1,389	65	63
Loss on asset write-down and dispositions, net	(1,408)	(819)	(173)
Other, net	198	362	(80)
Total other income, net	$ 26,379	$ 22,718	$ 22,101

- Definition

Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

+ References

+ Details

Property, Plant, and Equipment

12 Months Ended

Dec. 31, 2025

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment

The following table sets forth the components of property, plant and equipment:


	December 31,
(In thousands)	2025		2024
Land	$	9,549	$	4,235

Buildings	212,145		142,605
Machinery and equipment	565,082		512,894
Construction in progress	24,964		25,451
Total	811,740		685,185
Less accumulated depreciation	(528,677)		(473,320)
Property, plant and equipment, net	$	283,063	$	211,865

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2025
Auditor Information [Abstract]
Auditor Name	Ernst & Young LLP
Auditor Location	Pittsburgh, Pennsylvania
Auditor Firm ID	42

Segment Information - Revenue from External Customers by Products and Services (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue from External Customer [Line Items]
Net sales	$ 510,913	$ 468,445	$ 474,116	$ 421,340	$ 499,696	$ 432,679	$ 462,463	$ 413,302	$ 1,874,814	$ 1,808,140	$ 1,787,647
Revenues									$ 1,874,814	$ 1,808,140	$ 1,787,647
Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									100.00%	100.00%	100.00%
Firefighter Safety
Revenue from External Customer [Line Items]
Net sales									$ 647,474	$ 712,684	$ 684,224
Firefighter Safety \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									34.00%	39.00%	38.00%
Detection
Revenue from External Customer [Line Items]
Revenues									$ 763,393	$ 642,792	$ 634,915
Detection \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									41.00%	36.00%	36.00%
Industrial PPE and Other
Revenue from External Customer [Line Items]
Net sales									$ 463,947	$ 452,664	$ 468,508
Industrial PPE and Other \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									25.00%	25.00%	26.00%
Americas
Revenue from External Customer [Line Items]
Revenues									$ 1,261,841	$ 1,246,641	$ 1,235,594
Americas \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									100.00%	100.00%	100.00%
Americas \| Firefighter Safety
Revenue from External Customer [Line Items]
Net sales									$ 446,245	$ 507,738	$ 501,676
Americas \| Firefighter Safety \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									35.00%	41.00%	41.00%
Americas \| Detection
Revenue from External Customer [Line Items]
Revenues									$ 501,784	$ 426,839	$ 419,312
Americas \| Detection \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									40.00%	34.00%	34.00%
Americas \| Industrial PPE and Other
Revenue from External Customer [Line Items]
Net sales									$ 313,812	$ 312,064	$ 314,606
Americas \| Industrial PPE and Other \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									25.00%	25.00%	25.00%
International
Revenue from External Customer [Line Items]
Revenues									$ 612,973	$ 561,499	$ 552,053
International \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									100.00%	100.00%	100.00%
International \| Firefighter Safety
Revenue from External Customer [Line Items]
Net sales									$ 201,229	$ 204,946	$ 182,548
International \| Firefighter Safety \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									33.00%	36.00%	33.00%
International \| Detection
Revenue from External Customer [Line Items]
Revenues									$ 261,609	$ 215,953	$ 215,603
International \| Detection \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									43.00%	38.00%	39.00%
International \| Industrial PPE and Other
Revenue from External Customer [Line Items]
Net sales									$ 150,135	$ 140,600	$ 153,902
International \| Industrial PPE and Other \| Sales \| Product concentration risk
Revenue from External Customer [Line Items]
Concentration risk (percentage)									24.00%	26.00%	28.00%

Pensions and Other Post-retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2025

Retirement Benefits [Abstract]

Schedule of Defined Benefit Pension Plans and Other Postretirement Benefits Plan

Defined benefit pension plan and other post-retirement benefits plan information is provided in the following tables:


	Pension Benefits				Other Benefits
(In thousands)	2025		2024		2025		2024
Change in Benefit Obligations
Benefit obligations at January 1	$	474,484	$	521,474	$	22,046	$	21,386
Service cost	8,118		9,214		124		176
Interest cost	24,178		23,307		1,104		994
Participant contributions	165		232		222		285
Plan amendments	605		(20)		—		—
Actuarial (gains) losses(a)	(5,524)		(27,259)		(569)		1,696
Benefits paid	(29,818)		(28,159)		(2,269)		(2,491)

Settlements	(2,282)		(17,576)		—		—


Acquisitions	8,554		—		—		—
Currency translation	11,263		(6,729)		—		—
Benefit obligations at December 31	$	489,743	$	474,484	$	20,658	$	22,046
Change in Plan Assets
Fair value of plan assets at January 1	$	580,364	$	563,449	$	—	$	—
Actual return on plan assets	83,400		55,610		—		—
Employer contributions	6,644		7,877		2,047		2,206
Participant contributions	165		232		222		285

Settlements	(2,282)		(17,576)		—		—
Benefits paid	(29,818)		(28,159)		(2,269)		(2,491)


Administrative expenses paid	(56)		(62)		—		—
Currency translation	546		(1,007)		—		—
Fair value of plan assets at December 31	$	638,963	$	580,364	$	—	$	—
Funded Status
Funded status at December 31	$	149,220	$	105,880	$	(20,658)	$	(22,046)

Unrecognized prior service cost	794		728		—		—
Unrecognized net actuarial (gains) losses	(1,252)		40,339		5,584		6,804
Net amount recognized	$	148,762	$	146,947	$	(15,074)	$	(15,242)
Amounts Recognized in the Balance Sheets
Noncurrent assets	$	279,450	$	224,638	$	—	$	—
Current liabilities	(8,522)		(7,474)		(1,963)		(2,145)
Noncurrent liabilities	(121,708)		(111,284)		(18,695)		(19,901)
Net amount recognized	$	149,220	$	105,880	$	(20,658)	$	(22,046)
Amounts Recognized in Accumulated Other Comprehensive Loss
Net actuarial (gains) losses	$	(1,252)	$	40,339	$	5,584	$	6,804
Prior service cost	794		728		—		—

Total (before tax effects)	$	(458)	$	41,067	$	5,584	$	6,804
Accumulated Benefit Obligations for all Defined Benefit Plans	$	464,203	$	442,734	$	—	$	—
(a)Actuarial (gains) losses for both periods relate primarily to the increase in discount rates used in measuring plan obligations as of December 31, 2025, and 2024, respectively.

Components of Net Periodic Benefit (Credit) Cost


	Pension Benefits						Other Benefits
(In thousands)	2025		2024		2023		2025		2024		2023
Components of Net Periodic Benefit (Income) Cost
Service cost	$	8,118	$	9,214	$	7,587	$	124	$	176	$	214
Interest cost	24,178		23,307		23,775		1,104		994		1,090
Expected return on plan assets	(48,030)		(42,832)		(39,639)		—		—		—

Amortization of prior service cost (credit)	650		142		161		—		(184)		(245)
Recognized net actuarial losses	1,091		1,103		186		651		460		550
Settlement/curtailment loss	17		919		15		—		—		—

Net periodic benefit (income) cost(a)	$	(13,976)	$	(8,147)	$	(7,915)	$	1,879	$	1,446	$	1,609
(a) Components of net periodic benefit (income) cost other than service cost are included in the line item Other income, net, and service costs are included in the line items Cost of products sold and Selling, general and administrative in the Consolidated Statements of Income.

Schedule of Pension Plans with Accumulated Benefit Obligation in Excess of Plan Assets

Information for pension plans with an accumulated benefit obligation in excess of plan assets:


	Pension Benefits
(In thousands)	2025		2024
Aggregate accumulated benefit obligations (ABO)	$	128,023	$	117,299

Aggregate fair value of plan assets	2,416		3,334

Schedule of Pension Plans with Projected Benefit Obligation in Excess of Plan Assets

Information for pension plans with a projected benefit obligation in excess of plan assets:


	Pension Benefits
(In thousands)	2025		2024

Aggregate projected benefit obligations (PBO)	$	132,646	$	122,092
Aggregate fair value of plan assets	2,416		3,334

Schedule of Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost


	Pension Benefits				Other Benefits
	2025		2024		2025		2024
Assumptions used to determine benefit obligations
Average discount rate	5.37	%	5.35	%	5.09	%	5.49	%
Rate of compensation increase	2.97	%	2.96	%	3.00	%	3.00	%
Assumptions used to determine net periodic benefit cost
Average discount rate - Service cost	5.75	%	5.02	%	5.65	%	4.96	%
Average discount rate - Interest cost	5.07	%	4.64	%	5.22	%	4.85	%
Expected return on plan assets	8.05	%	7.23	%	—		—
Rate of compensation increase	2.96	%	3.78	%	3.00	%	3.00	%

Schedule of Expected Return on Assets for Net Periodic Pension Cost


	Pension Plan Assets at December 31,
	2025		2024
Equity securities	59	%	65	%
Fixed income securities	33		26
Pooled investment funds	7		7
Cash and cash equivalents	1		1
Insurance contracts	—		1
Total	100	%	100	%

Summary of Pension Plan Assets Measured at Fair Value on a Recurring Basis by Fair Value Hierarchy

The fair values of the Company's pension plan assets at December 31, 2025, were as follows:


					Fair Value
(In thousands)	Total		NAV		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Equity securities	$	374,848	$	59,938	$	314,910	$	—	$	—
Fixed income securities	210,277		—		129,420		80,857		—
Pooled investment funds	44,630		44,630		—		—		—
Cash and cash equivalents	6,792		4,403		2,389		—		—
Insurance contracts	2,416		—		—		2,416		—
Total	$	638,963	$	108,971	$	446,719	$	83,273	$	—

The fair values of the Company's pension plan assets at December 31, 2024, were as follows:


					Fair Value
(In thousands)	Total		NAV		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Equity securities	$	375,001	$	56,803	$	318,198	$	—	$	—
Fixed income securities	152,258		—		97,013		55,245		—
Pooled investment funds	42,182		42,182		—		—		—
Cash and cash equivalents	7,589		5,908		1,681		—		—
Insurance contracts	3,334		—		—		—		3,334
Total	$	580,364	$	104,893	$	416,892	$	55,245	$	3,334

Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Significant Accounting Policies [Line Items]
Restricted cash balances	$ 900,000	$ 500,000
Inventory, write-down, excess period	24 months
Depreciation	$ 49,700,000	45,600,000	$ 41,800,000
Unamortized software development costs	14,900,000	13,000,000.0	12,100,000
Software development cost depreciation expense	12,000,000.0	11,300,000	10,400,000
Goodwill, impairment loss	0	$ 0	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Significant Accounting Policies [Line Items]
Remaining performance obligation, amount	$ 29,300,000
Remaining performance obligation, expected timing of satisfaction, period	3 years
Buildings \| Minimum
Significant Accounting Policies [Line Items]
Useful lives	20 years
Buildings \| Maximum
Significant Accounting Policies [Line Items]
Useful lives	40 years
Machinery and equipment \| Minimum
Significant Accounting Policies [Line Items]
Useful lives	3 years
Machinery and equipment \| Maximum
Significant Accounting Policies [Line Items]
Useful lives	10 years
Software development
Significant Accounting Policies [Line Items]
Useful lives	3 years

Contingencies - Additional Information (Detail) $ in Thousands		12 Months Ended
	Jan. 05, 2023 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Feb. 06, 2026 lawsuit claim
Loss Contingencies [Line Items]
Tax-effected loss on divestiture		$ 0	$ 0	$ 199,578
Product warranty expense		13,000	$ 11,200	$ 8,900
MSA LLC \| Joint Venture By R&Q Insurance Holdings Ltd. And Obra Capital, Inc.
Loss Contingencies [Line Items]
Contributed cash and cash equivalents by business acquiree	$ 35,000
MSA LLC \| Discontinued Operations, Disposed of by Sale
Loss Contingencies [Line Items]
Contributed cash and cash equivalents in divestiture	$ 341,200	341,200
Tax-effected loss on divestiture		199,600
Disposal group, transaction costs		$ 5,600
Damages From Product Substances \| Subsequent Event
Loss Contingencies [Line Items]
Number of lawsuits \| lawsuit					1,288
Number of claims \| claim					22,090

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Capitalized research and development	$ 33,915	$ 31,030
Inventory	9,184	9,434
Net operating losses and tax credit carryforwards	8,078	6,715
Share-based compensation	5,039	6,149
Accrued expenses and other reserves	6,419	5,006
Reserve for doubtful accounts	1,391	1,071
Other	5,847	2,177
Total deferred tax assets	69,873	61,582
Valuation allowances	(4,464)	(4,815)
Net deferred tax assets	65,409	56,767
Goodwill and intangibles	(98,104)	(79,917)
Employee benefits	(54,923)	(41,399)
Property, plant and equipment	(16,992)	(15,461)
Other	(1,939)	(1,501)
Total deferred tax liabilities	(171,958)	(138,278)
Net deferred taxes	$ (106,549)	$ (81,511)

Stock Plans (Tables)

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Expense

Stock-based compensation expense was as follows:


(In thousands)	2025		2024		2023
Restricted stock units	$	9,979	$	11,239	$	8,062

Performance stock units	4,862		6,760		21,961
Employee stock purchase program	356		186		—
Total stock-compensation expense before income taxes	15,197		18,185		30,023
Income tax benefit	3,632		4,492		7,356
Total stock-compensation expense, net of income tax benefit	$	11,565	$	13,693	$	22,667

Summary of Option Activity

A summary of option activity follows:


	Shares	Weighted Average Exercise Price		Exercisable at Year-end
Outstanding January 1, 2023	58,156	$	46.48

Exercised	(31,394)	46.90

Forfeited	(226)	49.44
Outstanding December 31, 2023	26,536	45.95		26,536

Exercised	(10,666)	46.93

Forfeited	(852)	48.65
Outstanding December 31, 2024	15,018	45.10		15,018

Exercised	(12,776)	44.53
Forfeited	(25)	54.29
Outstanding December 31, 2025	2,217	$	48.30	2,217

Characteristics of Outstanding and Exercisable Stock Options

For various exercise price ranges, characteristics of outstanding and exercisable stock options at December 31, 2025, were as follows:


	Stock Options Outstanding and Exercisable
Range of Exercise Prices	Shares	Weighted-Average
		Exercise Price		Remaining Life

$33.01 – $45.00	500	$	44.50	0.08
$45.01 – $57.93	1,717	49.41		2.01
$33.01 – $57.93	2,217	$	48.30	1.58

Summary of Restricted Stock Unit Activity

A summary of restricted stock unit activity follows:


	Shares	Weighted Average Grant Date Fair Value
Unvested January 1, 2023	145,886	$	137.36
Granted	81,150	142.92
Vested	(43,107)	126.27
Forfeited	(10,078)	140.28
Unvested at December 31, 2023	173,851	142.73
Granted	84,282	178.50
Vested	(50,840)	163.66
Forfeited	(27,709)	163.49
Unvested at December 31, 2024	179,584	150.39
Granted	73,130	160.33
Vested	(69,704)	138.75
Forfeited	(14,623)	152.04
Unvested at December 31, 2025	168,387	$	159.38

Summary of Performance Stock Unit Activity

A summary of performance stock unit activity follows:


	Shares	Weighted Average Grant Date Fair Value
Unvested at January 1, 2023	178,760	$	146.28
Granted	77,654	132.39
Vested	(53,407)	127.36
Performance adjustments	(3,009)	127.40
Forfeited	(10,777)	147.06
Unvested at December 31, 2023	189,221	146.17
Granted	40,787	177.34
Vested	(77,544)	174.13
Performance adjustments	20,488	194.10
Forfeited	(10,956)	149.16
Unvested at December 31, 2024	161,996	146.50
Granted	63,964	162.61
Vested	(118,605)	143.47
Performance adjustments	64,457	143.49
Forfeited	(20,260)	156.89
Unvested at December 31, 2025	151,552	$	153.00

Cash and Cash Equivalents

12 Months Ended

Dec. 31, 2025

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

Several of the Company's subsidiaries participate in a notional cash pooling arrangement to manage global liquidity requirements. As part of a master netting arrangement, the participants combine their cash balances in pooling accounts at the same financial institution with the ability to offset bank overdrafts of one participant against positive cash account balances held by another participant. Under the terms of the master netting arrangement, the financial institution has the right, ability and intent to offset a positive balance in one account against an overdrawn amount in another account. Amounts in each of the accounts are unencumbered and unrestricted with respect to use. As such, the net cash balance related to this pooling arrangement is included in Cash and cash equivalents in the Consolidated Balance Sheets.

The Company's net cash pool position consisted of the following:


(In thousands)	December 31, 2025
Gross cash pool position	$	86,392
Less: cash pool borrowings	(83,118)
Net cash pool position	$	3,274

Consolidated Statements of Changes in Retained Earnings, Accumulated Other Comprehensive Loss and Noncontrolling Interests (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Stockholders' Equity [Abstract]
Common dividends (in dollars per share)	$ 2.10	$ 2.00	$ 1.87
Tax reclassification adjustment	$ (10,703)	$ (10,227)	$ (1,706)
Preferred dividends (in dollars per share)	$ 2.25	$ 2.25	$ 2.25

Income Taxes - Reconciliation Between U.S. Federal Income Tax Rate and Effective Tax Rate Prior Years (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
U.S. federal income tax rate	21.00%	21.00%	21.00%
State income taxes-U.S.	1.80%	2.90%	3.70%
Taxes on non-U.S. income	1.60%	1.10%	(0.60%)
Nondeductible compensation	0.70%	0.50%	1.90%
Divestiture (Note 21)		0.00%	46.60%
Valuation allowances		(1.20%)	(0.20%)
Research and development credit		0.70%	0.80%
Employee share-based payments		(0.20%)	(0.40%)
Taxes on non-U.S. income - U.S., Canadian & European reorganization		(0.10%)	(0.50%)
Foreign exchange on entity closures		(0.10%)	0.00%
Other	0.00%	0.80%	0.90%
Effective income tax rate	23.90%	24.00%	71.60%

Stock Plans

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Stock Plans

The 2023 Management Equity Incentive Plan and its predecessor, the 2016 Management Equity Incentive Plan, provide for various forms of stock-based compensation for eligible employees through, in the case of the 2023 Management Equity Incentive Plan, May 2033, including stock options, restricted stock awards, restricted stock units and performance stock units. The 2024 Non-Employee Directors' Equity Incentive Plan and its predecessor, the 2017 Non-Employee Directors’ Equity Incentive Plan provides for grants of stock options and restricted stock to non-employee directors through, in the case of the 2024 Non-Employee Directors' Equity Incentive Plan, May 2034. Stock options are granted at market prices and expire after ten years. The 2014 MSA Employee Stock Purchase Plan (“ESPP”) permits eligible employees to purchase the Company's shares of common stock at a 15% discount from fair market value, semi-annually, from the stock market. The ESPP plan is considered a compensatory plan. The discount is recorded as a component of selling, general and administrative expense in the Company's Consolidated Statements of Operations. As of December 31, 2025, there were 1,612,699; 79,844; and 53,126 shares, respectively, reserved for future grants under the management and non-employee directors’ equity incentive and employee stock purchase plans.

Stock options are exercisable beginning three years after the grant date. Restricted stock and restricted stock units are granted without payment to the Company and generally vest three years after the grant date. Restricted stock and restricted stock units are valued at the market value of the stock on the grant date. Performance stock units with a market condition are valued at an estimated fair value using a Monte Carlo simulation model. The final number of shares to be issued for performance stock units may range from zero to 240% of the target award based on achieving the specified performance targets over the performance period and further range based upon the achieved market metric over the performance period. In general, unvested stock options, restricted stock and performance stock units are forfeited if the participant’s employment with the Company terminates for any reason other than retirement, death or disability. We issue Treasury shares for stock option exercises and grants of restricted stock and performance stock. Please refer to Note 8—Capital Stock for further information regarding stock compensation share issuance.

Stock-based compensation expense was as follows:


(In thousands)	2025		2024		2023
Restricted stock units	$	9,979	$	11,239	$	8,062

Performance stock units	4,862		6,760		21,961
Employee stock purchase program	356		186		—
Total stock-compensation expense before income taxes	15,197		18,185		30,023
Income tax benefit	3,632		4,492		7,356
Total stock-compensation expense, net of income tax benefit	$	11,565	$	13,693	$	22,667

We did not capitalize any stock-based compensation expense, and all expense is included in Selling, general and administrative expense in the Consolidated Statements of Income.

A summary of option activity follows:


	Shares	Weighted Average Exercise Price		Exercisable at Year-end
Outstanding January 1, 2023	58,156	$	46.48

Exercised	(31,394)	46.90

Forfeited	(226)	49.44
Outstanding December 31, 2023	26,536	45.95		26,536

Exercised	(10,666)	46.93

Forfeited	(852)	48.65
Outstanding December 31, 2024	15,018	45.10		15,018

Exercised	(12,776)	44.53
Forfeited	(25)	54.29
Outstanding December 31, 2025	2,217	$	48.30	2,217

For various exercise price ranges, characteristics of outstanding and exercisable stock options at December 31, 2025, were as follows:


	Stock Options Outstanding and Exercisable
Range of Exercise Prices	Shares	Weighted-Average
		Exercise Price		Remaining Life

$33.01 – $45.00	500	$	44.50	0.08
$45.01 – $57.93	1,717	49.41		2.01
$33.01 – $57.93	2,217	$	48.30	1.58

Cash received from the exercise of stock options was $0.6 million, $0.5 million and $1.5 million for the years ended December 31, 2025, 2024 and 2023, respectively. The tax benefit we realized from these exercises was $0.7 million, $0.6 million and $0.9 million for the years ended December 31, 2025, 2024 and 2023, respectively.

Stock options become exercisable when they are vested. The aggregate intrinsic value of stock options exercisable and outstanding at December 31, 2025 was $0.2 million.

Restricted stock awards and restricted stock units are valued at the market value of the stock on the grant date. A summary of restricted stock unit activity follows:


	Shares	Weighted Average Grant Date Fair Value
Unvested January 1, 2023	145,886	$	137.36
Granted	81,150	142.92
Vested	(43,107)	126.27
Forfeited	(10,078)	140.28
Unvested at December 31, 2023	173,851	142.73
Granted	84,282	178.50
Vested	(50,840)	163.66
Forfeited	(27,709)	163.49
Unvested at December 31, 2024	179,584	150.39
Granted	73,130	160.33
Vested	(69,704)	138.75
Forfeited	(14,623)	152.04
Unvested at December 31, 2025	168,387	$	159.38

A summary of performance stock unit activity follows:


	Shares	Weighted Average Grant Date Fair Value
Unvested at January 1, 2023	178,760	$	146.28
Granted	77,654	132.39
Vested	(53,407)	127.36
Performance adjustments	(3,009)	127.40
Forfeited	(10,777)	147.06
Unvested at December 31, 2023	189,221	146.17
Granted	40,787	177.34
Vested	(77,544)	174.13
Performance adjustments	20,488	194.10
Forfeited	(10,956)	149.16
Unvested at December 31, 2024	161,996	146.50
Granted	63,964	162.61
Vested	(118,605)	143.47
Performance adjustments	64,457	143.49
Forfeited	(20,260)	156.89
Unvested at December 31, 2025	151,552	$	153.00

The 2025 performance adjustments above relate primarily to 2022 performance unit awards which vested in the first quarter of 2025 at 220% of the target award based on both cumulative performance against EBITDA margin and revenue growth targets and MSA's TSR during the three-year performance period.

During the years ended December 31, 2025, 2024 and 2023, the total intrinsic value of stock options exercised (the difference between the market price on the date of exercise and the option price paid to exercise the option) was $1.4 million, $1.5 million and $3.7 million, respectively. The fair values of restricted stock vested during the years ended December 31, 2025, 2024 and 2023 were $9.7 million, $8.3 million and $5.4 million, respectively. The fair value of performance stock units vested during the years ended December 31, 2025, 2024 and 2023 was $17.0 million, $13.5 million and $6.8 million, respectively.

On December 31, 2025, there was $17.3 million of unrecognized stock-based compensation expense. The weighted average period over which this expense is expected to be recognized was approximately 1.5 years.

Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2025

Earnings Per Share [Abstract]

Schedule of Earnings per Share


(In thousands, except per share amounts)	2025		2024		2023
Net income	$	278,924	$	284,967	$	58,583
Preferred stock dividends	(41)		(41)		(41)
Net income available to common equity	278,883		284,926		58,542
Dividends and undistributed earnings allocated to participating securities	(26)		(24)		(26)
Net income available to common shareholders	$	278,857	$	284,902	$	58,516







Basic weighted-average shares outstanding	39,216		39,371		39,307
Stock options and other stock-based awards	130		164		166
Diluted weighted-average shares outstanding	39,346		39,535		39,473
Antidilutive stock-based awards	—		—		—

Earnings per share:
Basic	$	7.11	$	7.24	$	1.49
Diluted	$	7.09	$	7.21	$	1.48

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2025

Debt Disclosure [Abstract]

Schedule of Outstanding Debt


	December 31,
(In thousands)	2025		2024
2016 Senior Notes payable through 2031, 3.40%, net of debt issuance costs	$	49,278	$	53,400
2021 Senior Notes payable through 2036, 2.69%, net of debt issuance costs	99,776		99,754
2021 Senior Notes payable through 2036, 2.69%, net of debt issuance costs	99,776		99,754
Senior revolving credit facility maturing in 2030, net of debt issuance costs	282,137		—
2023 Term Loan credit agreement maturing in 2026, net of debt issuance costs	—		205,152
2023 Senior Notes payable through 2028, 5.25%, net of debt issuance costs	49,967		49,953
Total	580,934		508,013
Amounts due within one year	8,225		26,391
Long-term debt, net of debt issuance costs	$	572,709	$	481,622

Earnings per Share - Schedule of Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Net income	$ 86,933	$ 69,613	$ 62,773	$ 59,605	$ 87,946	$ 66,648	$ 72,234	$ 58,139	$ 278,924	$ 284,967	$ 58,583
Preferred stock dividends									(41)	(41)	(41)
Net income available to common equity									278,883	284,926	58,542
Dividends and undistributed earnings allocated to participating securities									(26)	(24)	(26)
Net income available to common shareholders									$ 278,857	$ 284,902	$ 58,516
Basic weighted-average shares outstanding (in shares)									39,216	39,371	39,307
Stock options and other stock-based awards (in shares)									130	164	166
Diluted weighted-average shares outstanding (in shares)									39,346	39,535	39,473
Antidilutive stock options (in shares)									0	0	0
Earnings per share:
Basic (in dollars per share)	$ 2.22	$ 1.78	$ 1.60	$ 1.51	$ 2.23	$ 1.69	$ 1.83	$ 1.48	$ 7.11	$ 7.24	$ 1.49
Diluted (in dollars per share)	$ 2.21	$ 1.77	$ 1.59	$ 1.51	$ 2.22	$ 1.69	$ 1.83	$ 1.47	$ 7.09	$ 7.21	$ 1.48

Acquisitions - Pro Forma Financial Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Business Combination [Line Items]
Basic earnings per share (in dollars per share)	$ 7.17
Diluted earnings per share (in dollars per share)	$ 7.15
M&C
Business Combination [Line Items]
Net sales	$ 1,893,300,000	$ 1,860,800,000
Net income	$ 281,400,000	$ 291,900,000
Basic earnings per share (in dollars per share)		$ 7.41
Diluted earnings per share (in dollars per share)		$ 7.38

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating Activities
Net income	$ 278,924	$ 284,967	$ 58,583
Depreciation and amortization	71,591	64,333	60,773
Tax-effected loss on divestiture of MSA LLC (Note 21)	0	0	199,578
Stock-based compensation (Note 12)	15,197	18,185	30,023
Pension income (Note 16)	(13,976)	(8,147)	(7,915)
Deferred income tax benefit (Note 11)	(4,962)	(98)	(8,514)
Loss on asset write-down and dispositions, net	1,408	819	173
Pension contributions (Note 16)	(7,028)	(7,877)	(5,217)
Currency exchange losses, net	15,801	3,638	17,079
Product liability expense (Note 21)	0	0	3
Product liability payments (Note 21)	0	0	(5,250)
Contribution on divestiture of MSA LLC (Note 21)	0	0	(341,186)
Changes in:
Trade receivables	(5,172)	(1,383)	(7,102)
Inventories (Note 5)	(10,464)	(14,673)	51,585
Accounts payable	(4,656)	3,057	(5,452)
Other current assets and liabilities	26,909	(49,087)	53,509
Other noncurrent assets and liabilities	295	2,694	2,187
Cash Flow From Operating Activities	363,867	296,428	92,857
Investing Activities
Capital expenditures	(68,438)	(54,223)	(42,764)
Acquisitions, net of cash acquired (Note 15)	189,275	0	0
Property disposals and other investing	79	468	2,811
Cash Flow Used In Investing Activities	(257,634)	(53,755)	(39,953)
Financing Activities
Payments on long-term debt (Note 13)	(1,076,384)	(1,243,897)	(1,871,102)
Proceeds from long-term debt (Note 13)	1,143,698	1,149,643	1,895,000
Debt issuance costs	(3,084)	(200)	(1,138)
Cash dividends paid	(82,344)	(78,759)	(73,488)
Company stock purchases (Note 8)	(89,962)	(37,340)	(3,961)
Exercise of stock options (Note 8)	569	501	1,473
Employee stock purchase plan (Note 8)	2,042	1,363	963
Cash Flow Used In Financing Activities	(105,465)	(208,689)	(52,253)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	127	(17,295)	(16,671)
Change in cash, cash equivalents and restricted cash	895	16,689	(16,020)
Beginning cash, cash equivalents and restricted cash	165,097	148,408	164,428
Ending cash, cash equivalents and restricted cash	165,992	165,097	148,408
Supplemental cash flow information:
Cash and cash equivalents	165,067	164,560	146,442
Restricted cash included in prepaid expenses and other current assets	925	537	1,966
Total cash, cash equivalents and restricted cash	165,992	165,097	148,408
Interest paid in cash	32,135	35,703	47,258
Income tax paid in cash	$ 101,605	$ 102,673	$ 69,085

Pensions and Other Post-retirement Benefits - Schedule of Expected Return on Assets for Net Periodic Pension Cost (Detail)	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Plan assets, actual allocation	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets, actual allocation	59.00%	65.00%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets, actual allocation	33.00%	26.00%
Pooled investment funds
Defined Benefit Plan Disclosure [Line Items]
Plan assets, actual allocation	7.00%	7.00%
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets, actual allocation	1.00%	1.00%
Insurance contracts
Defined Benefit Plan Disclosure [Line Items]
Plan assets, actual allocation	0.00%	1.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Quarterly Financial Information (Unaudited)

12 Months Ended

Dec. 31, 2025

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information (Unaudited)


	2025
	Quarters
(In thousands, except per share amounts)	1st		2nd		3rd		4th		Year
Net sales	$	421,340	$	474,116	$	468,445	$	510,913	$	1,874,814
Gross profit	193,395		220,710		217,616		239,392		871,113
Net income	59,605		62,773		69,613		86,933		278,924

Earnings per share(1)
Basic	$	1.51	$	1.60	$	1.78	$	2.22	$	7.11
Diluted	1.51		1.59		1.77		2.21		7.09


	2024
	Quarters
(In thousands, except earnings per share)	1st		2nd		3rd		4th		Year
Net sales	$	413,302	$	462,463	$	432,679	$	499,696	$	1,808,140
Gross profit	195,531		223,029		207,456		234,429		860,445
Net income	58,139		72,234		66,648		87,946		284,967

Earnings per share(1)
Basic	$	1.48	$	1.83	$	1.69	$	2.23	$	7.24
Diluted	1.47		1.83		1.69		2.22		7.21
(1) Per share amounts are calculated independently for each period presented; therefore, the sum of the quarterly per share amounts may not equal the per share amounts for the year.

Contingencies - Warranty Reserve (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Warranty Expense [Rollforward]
Beginning warranty reserve	$ 13,724	$ 14,288	$ 15,230
Warranty payments	(15,129)	(11,802)	(9,794)
Warranty claims, current	12,922	10,684	9,128
Warranty claims, preexisting	82	765	(614)
Currency translation and other adjustments	265	(211)	338
Ending warranty reserve	$ 11,864	$ 13,724	$ 14,288

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Inventory Disclosure [Abstract]
Finished products	$ 99,266	$ 93,356
Work in process	15,395	13,413
Raw materials and supplies	228,374	190,027
Total inventories	$ 343,035	$ 296,796

Pensions and Other Post-retirement Benefits - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Percentage increase in the costs of covered health care benefits assumed when measuring net periodic benefit expense		7.80%
Percentage decrease in health care benefits for successive year	0.40%	0.30%
Ultimate health care cost trend rate when measuring net periodic benefit expense		4.50%
Percentage increase in health care benefit cost	8.00%
Estimated future percentage of health care benefits	4.50%
Defined contribution pension plan expense	$ 14.1	$ 13.6	$ 13.4
Minimum
Defined Benefit Plan Disclosure [Line Items]
Estimated contributions by employer to pension plans	8.0
Maximum
Defined Benefit Plan Disclosure [Line Items]
Estimated contributions by employer to pension plans	10.0
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Estimated benefit payments, year one	31.2
Estimated benefit payments, year two	31.7
Estimated benefit payments, year three	32.2
Estimated benefit payments, year four	32.8
Estimated benefit payments, year five	33.6
Estimated benefit payments, five years thereafter	174.4
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Estimated benefit payments, year one	2.0
Estimated benefit payments, year two	2.1
Estimated benefit payments, year three	2.1
Estimated benefit payments, year four	2.1
Estimated benefit payments, year five	2.2
Estimated benefit payments, five years thereafter	$ 9.1

Cash and Cash Equivalents (Detail) $ in Thousands	Dec. 31, 2025 USD ($)
Cash and Cash Equivalents [Abstract]
Gross cash pool position	$ 86,392
Less: cash pool borrowings	(83,118)
Net cash pool position	$ 3,274

Income Taxes

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Income Taxes

The Company adopted ASU No. 2023-09 (“ASU 2023-09”), Improvements to Income Tax Disclosures, applying it prospectively for the year ended December 31, 2025.


(In thousands)	2025		2024		2023
Components of income before income taxes
U.S. income	$	242,979	$	243,129	$	80,229
Non-U.S. income	123,419		131,877		126,459
Income before income taxes	$	366,398	$	375,006	$	206,688
Provision for income taxes
Current
Federal	$	46,980	$	47,060	$	49,642
State	9,981		12,868		9,510
Non-U.S.	35,475		30,209		27,101
Total current provision	$	92,436	$	90,137	$	86,253
Deferred
Federal	$	2,666	$	(3,141)	$	54,272
State	(1,503)		1,046		12,914
Non-U.S.	(6,125)		1,997		(5,334)
Total deferred provision (benefit)	(4,962)		(98)		61,852
Provision for income taxes	$	87,474	$	90,039	$	148,105

Below is a tabular rate reconciliation pursuant to the disclosure requirements of ASU 2023-09 for the year ended December 31, 2025:


	2025
(in thousands, except percentages)	Amount		Percent
U.S. federal statutory income tax	$	76,944	21.0	%
State and local income taxes, net of federal income tax effect(1)	6,652		1.8	%
Foreign tax effects	5,700		1.6	%
Nontaxable or nondeductible items	2,606		0.7	%
Effect of cross-border tax laws	(149)		—	%
Tax credits	(3,891)		(1.1)	%
Changes in unrecognized tax benefits	(420)		(0.1)	%
Other	32		—	%
Provision for income taxes	$	87,474	23.9	%
(1)The states that contribute to the majority (greater than 50%) of the tax effect in this category include California, Illinois, Maryland, Indiana, New Hampshire, Pennsylvania and Wisconsin.

Below is a reconciliation of the U.S. federal income tax rates to the Company's effective tax rate for the years ended December 21, 2024 and 2023:


	2024		2023
U.S. federal income tax rate	21.0	%	21.0	%
State income taxes-U.S.	2.9	%	3.7	%
Taxes on non-U.S. income	1.1	%	(0.6)	%
Nondeductible compensation	0.5	%	1.9	%
Divestiture (Note 21)	—	%	46.6	%
Valuation allowances	(1.2)	%	(0.2)	%
Research and development credit	(0.7)	%	(0.8)	%
Employee share-based payments	(0.2)	%	(0.4)	%
Taxes on non-U.S. income - U.S., Canadian & European reorganization	(0.1)	%	(0.5)	%
Foreign exchange on entity closures	(0.1)	%	—	%

Other	0.8	%	0.9	%
Effective income tax rate	24.0	%	71.6	%

Disclosed below is a summary of income taxes paid by jurisdiction pursuant to the disclosure requirements of ASU 2023-09 for the year ended December 31, 2025:


(in thousands)	2025
United States - Federal	$	48,993
United States - State and local	11,798
Brazil	7,900
Switzerland	7,372
Germany	5,375
Other	20,167
Total	$	101,605

Components of deferred tax assets and liabilities:


	December 31,
(In thousands)	2025		2024
Deferred tax assets
Capitalized research and development	$	33,915	$	31,030

Inventory	9,184		9,434
Net operating losses and tax credit carryforwards	8,078		6,715
Share-based compensation	5,039		6,149
Accrued expenses and other reserves	6,419		5,006
Reserve for doubtful accounts	1,391		1,071

Other	5,847		2,177
Total deferred tax assets	69,873		61,582
Valuation allowances	(4,464)		(4,815)
Net deferred tax assets	$	65,409	$	56,767
Deferred tax liabilities
Goodwill and intangibles	$	(98,104)	$	(79,917)
Employee benefits	(54,923)		(41,399)
Property, plant and equipment	(16,992)		(15,461)

Other	(1,939)		(1,501)
Total deferred tax liabilities	(171,958)		(138,278)
Net deferred taxes	$	(106,549)	$	(81,511)

At December 31, 2025, we had net operating loss carryforwards of approximately $30.0 million. All net operating loss carryforwards without a valuation allowance may be carried forward for a period of at least six years.

A reconciliation of the change in the tax liability for unrecognized tax benefits for the years ended December 31, 2025 and 2024 is as follows:


(In thousands)	2025		2024
Beginning balance	$	1,270	$	3,084
Adjustments for tax positions related to the current year	—		51
Adjustments for tax positions related to prior years	3,347		(607)
Settlements	(194)		(929)
Statute expiration	(138)		(329)
Ending balance	$	4,285	$	1,270

The total amount of unrecognized tax benefits, if recognized, would reduce our future effective tax rate. We have $1.5 million in recognized tax benefits associated with these liabilities in 2025 and had no recognized tax benefits associated with these liabilities in 2024.

We recognize interest related to unrecognized tax benefits in interest expense and penalties in operating expenses. Our liability for accrued interest and penalties related to uncertain tax positions was $0.5 million at December 31, 2025 and $0.2 million at December 31, 2024.

We are subject to regular review and audit by both foreign and domestic tax authorities. While we believe our tax positions will be sustained, the final outcome of tax audits and related litigation may differ materially from the tax amounts recorded in our consolidated financial statements.

On July 4, 2025, the United States enacted into law the One, Big, Beautiful Bill Act ("the Act"). The Act makes permanent key elements of the Tax Cuts and Jobs Act, including 100% bonus depreciation, domestic research cost expensing, and the business interest expense limitation. The Act has multiple effective dates, with certain provisions effective in 2025 and others implemented through 2027. The Act did not have a material impact on the financial statements in 2025.

We file income tax returns in the U.S. federal jurisdiction, and various state and foreign jurisdictions. With few exceptions, we are no longer subject to U.S. federal, state, and local, or non-U.S. income tax examinations by tax authorities for years prior to 2021.

The Organization for Economic Co-operation and Development (OECD) framework for a global minimum corporate tax rate of 15% for companies with global revenues above €750.0 million (referred to as Pillar 2), with effective dates beginning in January 2024, has been enacted by a number of foreign jurisdictions. We meet the overall revenue threshold and fall within the scope of Pillar 2. As such, we have complied with the requirements of the legislation and the application of Pillar 2 resulted in additional tax expense of $2.2 million and $1.1 million, for the years ended December 31, 2025 and 2024, respectively.

- Definition

The entire disclosure for income tax.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477617/942-740-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 740
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478822/944-740-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12C

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12B

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477891/740-270-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.5.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-13

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/740/tableOfContent

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-14

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-21

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-17

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482603/740-30-50-2

+ Details

Revenue Recognition (Details) $ in Millions	Dec. 31, 2025 USD ($)
Prepaid Expenses and Other Current Assets
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss	$ 5.7
Other Noncurrent Assets
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss	7.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 29.3
Remaining performance obligation, expected timing of satisfaction, period	3 years

Restructuring Charges (Tables)

12 Months Ended

Dec. 31, 2025

Restructuring and Related Activities [Abstract]

Restructuring and Related Costs

Activity and reserve balances for restructuring charges were as follows:


(in millions)	Americas segment		International segment		Corporate		Total
Reserve balances at January 1, 2023	$	1.7	$	12.8	$	0.5	$	15.0
Restructuring charges	3.1		4.7		2.1		9.9
Currency translation and other adjustments	(0.1)		0.1		—		—
Cash payments / utilization	(3.9)		(8.6)		(2.6)		(15.1)
Reserve balances at December 31, 2023	$	0.8	$	9.0	$	—	$	9.8
Restructuring charges	1.6		3.5		1.3		6.4
Currency translation and other adjustments	(0.1)		(0.3)		—		(0.4)
Cash payments / utilization	(2.1)		(9.0)		(1.3)		(12.4)
Reserve balances at December 31, 2024	$	0.2	$	3.2	$	—	$	3.4
Restructuring charges	1.2		1.7		1.0		3.9
Currency translation and other adjustments	—		0.4		—		0.4
Cash payments / utilization	(0.6)		(2.8)		(1.0)		(4.4)
Reserve balances at December 31, 2025	$	0.8	$	2.5	$	—	$	3.3

Property, Plant, and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Unamortized computer software costs	$ 22,900	$ 19,900
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	811,740	685,185
Less accumulated depreciation	(528,677)	(473,320)
Property, plant and equipment, net	283,063	211,865
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,549	4,235
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	212,145	142,605
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	565,082	512,894
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 24,964	$ 25,451

Segment Information - Schedule Of Reportable Segment Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net sales to external customers	$ 1,874,814	$ 1,808,140	$ 1,787,647
Cost of products sold	1,003,701	947,695	935,509
Selling, general and administrative	414,254	394,707	396,645
Research and development	65,343	66,526	67,988
Adjusted operating income		464,657	449,316
Depreciation and amortization	71,591	64,333	60,773
Pension (income) expense	(13,976)	(8,147)	(7,915)
Total Assets	2,554,374	2,205,784	2,170,150
Capital expenditures	68,438	54,223	42,764
Americas
Segment Reporting Information [Line Items]
Net sales to external customers	1,261,841	1,246,641	1,235,594
Operating Segments \| Americas
Segment Reporting Information [Line Items]
Net sales to external customers	1,261,841	1,246,641	1,235,594
Cost of products sold	644,402	618,019	619,948
Selling, general and administrative	214,011	208,753	215,236
Research and development	38,670	39,783	40,793
Adjusted operating income	364,758	380,086	359,617
Depreciation and amortization	47,530	46,289	44,170
Pension (income) expense	(17,799)	(11,854)	(11,873)
Total Assets	1,621,335	1,480,124	1,433,244
Capital expenditures	34,479	31,546	28,011
Operating Segments \| International segment
Segment Reporting Information [Line Items]
Net sales to external customers	612,973	561,499	552,053
Cost of products sold	346,683	320,502	306,443
Selling, general and administrative	146,364	129,683	128,720
Research and development	26,674	26,743	27,191
Adjusted operating income	93,252	84,571	89,699
Depreciation and amortization	22,864	17,164	15,760
Pension (income) expense	3,823	3,707	3,958
Total Assets	935,830	682,816	734,856
Capital expenditures	13,804	19,091	13,341
Corporate
Segment Reporting Information [Line Items]
Adjusted operating income	458,010
Reconciling Items
Segment Reporting Information [Line Items]
Net sales to external customers	0	0	0
Cost of products sold	0	0	(128)
Selling, general and administrative	43,412	50,385	51,724
Research and development	0	0	4
Adjusted operating income
Depreciation and amortization	1,197	880	843
Pension (income) expense	0	0	0
Total Assets	(2,791)	42,844	2,050
Capital expenditures	$ 20,155	$ 3,586	$ 1,412

Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Dec. 31, 2025
Accounting Policies [Abstract]
General Information and Basis of Presentation	General Information and Basis of Presentation—The consolidated financial statements of MSA Safety Incorporated ("MSA" or "the Company") are prepared in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP") and require management to make certain judgments, estimates, and assumptions. These may affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements. They also may affect the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates upon subsequent resolution of identified matters.
Principles of Consolidation	Principles of Consolidation—The consolidated financial statements include the accounts of the Company and all subsidiaries. Intercompany accounts and transactions are eliminated.
Reclassifications	Reclassifications—Certain reclassifications of prior years' results have been made to conform to the current year presentation. These reclassifications relate to aligning prior year Other income, net, and Segment Information disclosures with current year presentation.
Currency Translation	Currency Translation—The functional currency of all significant non-U.S. operating subsidiaries is the local country currency. Assets and liabilities of these operations are translated at year-end exchange rates. Income statement accounts are translated using the average exchange rates for the reporting period. Translation adjustments for these subsidiaries are reported as a component of shareholders’ equity and are not included in net income. Foreign currency transaction gains and losses are included in net income for the reporting period.
Cash Equivalents	Cash Equivalents—Cash equivalents include temporary deposits with financial institutions and highly liquid investments with original maturities of 90 days or less.
Restricted Cash	Restricted Cash—Restricted cash, which is designated for use other than current operations, is included in prepaid expenses and other current assets in the Consolidated Balance Sheets. Restricted cash balances were $0.9 million and $0.5 million at December 31, 2025 and 2024, respectively. These balances were used to support letter of credit balances.
Inventories	Inventories—Inventories are stated at the lower of cost or net realizable value. Cost is determined using the first-in, first-out ("FIFO") method. It is the Company's general policy to write-down any inventory balance in excess of the last 24 months of consumption and any inventory identified as obsolete.
Property and Depreciation	Property and Depreciation—Property is recorded at cost. Depreciation is computed primarily using the straight-line method over the estimated useful lives of the assets, generally as follows: buildings 20 to 40 years, and machinery and equipment 3 to 10 years. Expenditures for significant renewals and improvements are capitalized. Ordinary repairs and maintenance are expensed as incurred. Gains or losses on property dispositions are included in other expense (income), net and the cost and related accumulated depreciation are removed from the accounts. Depreciation expense for the years ended December 31, 2025, 2024 and 2023 was $49.7 million, $45.6 million and $41.8 million, respectively. Properties, plant, and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets or asset groups may not be recoverable.
Software Development Costs	Software Development Costs—Software development costs are costs incurred to create, enhance and deploy the Company’s broad range of wireless technology and cloud-based computing safety services. Software development costs, other than software development costs qualifying for capitalization, are expensed as incurred. Costs of computer software developed or obtained for internal use that are incurred in the preliminary project and post implementation stages are expensed as incurred. Certain costs incurred during the application and development stage, which primarily include compensation and related expenses, are capitalized. Additionally, costs of upgrades and enhancements are capitalized when it is probable that the upgrades and enhancements will result in added functionality. During 2025, 2024 and 2023, respectively, there was $14.9 million, $13.0 million and $12.1 million of software development costs capitalized. The Company has unamortized computer software development costs of $22.9 million and $19.9 million as of December 31, 2025 and 2024, respectively, included in property, plant and equipment, net. Capitalized costs are amortized through cost of products sold using the straight-line method over the estimated useful life, which is normally three years, beginning in the period in which the software is ready for its intended use or when the upgrade or enhancement is deployed. Software development amortization expense was $12.0 million, $11.3 million and $10.4 million during the years ended December 31, 2025, 2024 and 2023, respectively.
Lease Arrangements	Lessee Arrangements—At the inception of our contracts, we determine if the contract is or contains a lease. A contract is or contains a lease if it conveys the right to control the use of an identified asset for a period of time in exchange for consideration. We have elected to not separate the lease and non-lease components within our lease contracts. Right-of-use assets and operating lease liabilities are recognized based on the present value of lease payments over the lease term at commencement. We use our incremental borrowing rate ("IBR") at the recognition date in determining the present value of future payments for leases that do not have a readily determinable implicit rate. Our IBR reflects a fully secured rate based on our credit rating, taking into consideration the repayment timing of the lease and any impacts due to the economic environment in which the lease operates. Our lease payments are largely fixed. Variable lease payments that depend on an index or a rate are included in the lease payments and are measured using the prevailing index or rate at the measurement date, with differences between the calculated lease payment and the actual lease payment being expensed in the period of the change. Other variable lease payments, including utilities, consumption and common area maintenance as well as repairs, maintenance and mileage overages on vehicles, are expensed during the period incurred. A majority of our real estate leases include options to extend the lease and options to early terminate the lease. Leases with an early termination option generally involve a termination payment. If we are reasonably certain to exercise an option to extend a lease, the extension period is included as part of the right-of-use asset and the lease liability. Some of our leases contain residual value guarantees. These are guarantees made to the lessor that the value of an underlying asset returned to the lessor at the end of a lease will be at least a specified amount. Our leases do not contain restrictions or covenants that restrict us from incurring other financial obligations. For our leases, we have elected to not apply the recognition requirements to leases of less than twelve months. These leases are expensed on a straight-line basis and are not included within the Company's operating lease asset or liability. Lease right-of-use assets and liabilities are recognized based on the present value of the fixed future lease payments over the lease term. Operating leases are included in Operating lease right-of-use assets, net, Other current liabilities, and Noncurrent operating lease liabilities in our Consolidated Balance Sheets. Finance leases are included in Property, plant and equipment, net, Other current liabilities, and Other noncurrent liabilities in our Consolidated Balance Sheets. Lease expense for all operating leases is classified in Cost of products sold or Selling, general and administrative expense in the Consolidated Statements of Income. For finance leases, the amortization of the right-of-use asset is included in depreciation and amortization, and the interest is included in interest expense.
Lessor Arrangements	Lessor Arrangements—The Company derives a portion of its revenue from various leasing arrangements where the Company is the lessor, primarily managed fire service contracts. Such arrangements provide for payments covering equipment provided, maintenance and interest. These arrangements meet the criteria to be accounted for as sales-type leases under ASC 842 and contain both lease and non-lease components. For a component to be separate, the customer would be able to benefit from the right of use of the component separately or with other resources readily available to the customer and the right of the use is not highly dependent or highly interrelated with the other rights to use the other underlying assets or components. Revenue from equipment provided is considered a lease component and recognized with point in time revenue recognition upon lease commencement. Upon the recognition of such revenue, an asset is established for the investment in sales-type leases. Maintenance revenue, which is considered a non-lease component, and interest is recognized over the lease term.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets—Intangible assets with a finite useful life are amortized on a straight-line basis over their useful lives. Indefinite lived intangible assets are assessed for possible impairment annually on October 1st or whenever circumstances change such that the recorded value of the asset may not be recoverable. We performed a quantitative assessment of the indefinite lived trade name intangible asset as outlined in ASC 350 by comparing the estimated fair value of the trade name intangible asset to its carrying value. We estimate the fair value using the relief from royalty income approach. A number of assumptions and estimates are involved in the application of the relief from royalty model, including sales volumes and prices, royalty rates and tax rates. Forecasts are based on sales generated by the underlying trade name assets and are generally based on approved business unit operating plans for the early years and historical relationships in later years. Based on these assessments, no impairments were identified during the years ended December 31, 2025, 2024 or 2023. All goodwill is assigned to and evaluated for impairment at the reporting unit level, which is defined as an operating segment or one level below an operating segment. Goodwill is not amortized, but evaluated for impairment at least annually or whenever events or changes in circumstance indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company may perform either a qualitative assessment of potential impairment or proceed directly to a quantitative assessment of potential impairment. If the Company chooses not to perform a qualitative assessment, or if it chooses to perform a qualitative assessment but is unable to qualitatively conclude that no impairment has occurred, then the Company will perform a quantitative assessment. A quantitative test for goodwill impairment is performed by determining the fair value of the related reporting units. The Company estimates the fair value of the reporting unit with which the goodwill is associated and compares it to the carrying value. If the estimated fair value of a reporting unit is less than its carrying value, an impairment charge is recognized for the excess of the reporting unit's carrying value over its fair value. In 2025, we performed a quantitative test at October 1, 2025. We estimate fair value of each reporting unit using a combination of valuation techniques, including the discounted cash flow ("DCF") method, a form of the income approach, and the guideline public company method, a form of the market approach, as we believe each are important indicators of fair value. A number of assumptions and estimates are involved in the application of the DCF model, such as discount rates, revenue growth rates, and operating margins which are affected by expectations about future market or economic conditions. Cash flow forecasts are generally based on approved reporting unit operating plans for the early years and historical relationships in later years. The market approach methodology measures value through an analysis of peer companies. The analysis entails measuring the multiples of earnings before interest, taxes, depreciation and amortization ("EBITDA") at which peer companies are trading. Management performed its evaluation and determined the fair value of each reporting unit is greater than the carrying amount and, accordingly,
Revenue Recognition	Revenue Recognition—We account for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers. Revenue from the sale of products and solutions is recognized when there is persuasive evidence of an arrangement and control passes to the customer. We establish our shipping terms according to local practice and market characteristics. We do not ship product unless we have an order or other documentation authorizing shipment to our customers. Our payment terms vary by the type and location of our customer and the products and solutions offered. The term between invoicing and when payment is due is not significant. Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Amounts billed and due from our customers are classified as receivables on the Consolidated Balance Sheets. We make appropriate provisions for credit losses, which have historically been insignificant in relation to our net sales. Certain contracts with customers have an element of variable consideration that is estimated when revenue is recognized under the contract. Rebates are based on achieving a certain level of purchases and other performance criteria that are documented in established distributor programs. These rebates are estimated based on projected sales to the customer and accrued as a reduction of net sales as they are earned by the customer. Sales, value add and other taxes collected with revenue-producing activities and remitted to governmental authorities are excluded from revenue. Refer to Note 2—Revenue Recognition for additional disclosures on revenue recognition matters.
Product Warranties	Product Warranties—Estimated expenses related to product warranties and additional service actions are charged to Cost of products sold in the period in which the related revenue is recognized or when significant product quality issues are identified.
Research and Development	Research and Development—Research and development costs are expensed as incurred.
Income Taxes	Income Taxes—Deferred income taxes are recognized for temporary differences between financial and tax reporting. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which those temporary differences are expected to be recovered or settled. If it is more likely than not that some portion or all of a deferred tax asset will not be realized, a valuation allowance is recognized. We record tax benefits related to uncertain tax positions taken or expected to be taken on a tax return when such benefits meet a more likely than not threshold. We recognize interest related to unrecognized tax benefits in interest expense and penalties in operating expenses. Deferred taxes are booked for available cash in excess of working capital for non-U.S. subsidiaries as these earnings are not considered to be permanently reinvested. The Company treats any Global Intangible Low Taxed Income as a period cost.
Stock-Based Compensation	Stock-Based Compensation—We recognize expense for employee and non-employee director stock-based compensation based on the grant date fair value of the awards. Except for retirement-eligible participants, for whom there is no requisite service period, this expense is recognized ratably over the requisite service periods following the date of grant.
Derivative Instruments	Derivative Instruments—We may use derivative instruments from time to time to minimize the effects of changes in currency exchange rates. We do not enter into derivative transactions for speculative purposes and do not hold derivative instruments for trading purposes. We designate certain derivative instruments as cash flow hedges to manage exposure to variability in future cash flows related to forecasted transactions. At hedge inception, we formally document the hedging relationship, including the risk management objective, the nature of the risk being hedged, and the method for assessing hedge effectiveness. Hedge effectiveness is evaluated at inception and on an ongoing basis to ensure the hedge remains highly effective. Derivatives are recorded at fair value on the balance sheet and changes in the fair value of derivative instruments designated as fair value hedges are recorded in the balance sheet as adjustments to the underlying hedged asset or liability. The effective portion of gains and losses on cash flow hedges is reported in accumulated other comprehensive loss (“AOCL”) and reclassified into net income in the same period the hedged item affects earnings. Any ineffective portion is recognized immediately into net income. If a hedged forecasted transaction is no longer probable, amounts previously recorded in AOCL are reclassified into net income immediately. When a hedging instrument is terminated, amounts in AOCL remain until the forecasted transaction occurs or is deemed no longer probable. Changes in the fair value of derivative instruments that do not qualify for hedge accounting treatment are recognized immediately into net income. Refer to Note 19—Derivative Financial Instruments for further details on hedging activity.
Commitments and Contingencies	Commitments and Contingencies—For asserted claims and assessments, liabilities are recorded when a loss is deemed to be probable and the amount of the loss is reasonably estimable. Management assesses the probability of an unfavorable outcome with respect to asserted claims or assessments based on many factors such as the nature of the matter, available defenses and case strategy, progress of the matter, views and opinions of legal counsel and other advisors, applicability and success of appeals processes, and the outcome of similar historical matters, among others. Once an unfavorable outcome is assessed to be probable, management evaluates estimates of the potential loss, and the most reasonable loss estimate is recorded (or, if the estimate of the loss is a range, and no amount within the range is considered to be a better estimate than any other amount, the minimum amount in the range is recorded). If a material loss is deemed to be reasonably possible but not probable, the matter is disclosed and no liability is recorded. With respect to unasserted claims or assessments, management first determines whether it is probable that a claim or assessment may be asserted and then, if so, the degree of probability of an unfavorable outcome. If an unfavorable outcome is probable, management assesses whether the amount of potential loss can be reasonably estimated and, if so, accrues the most reasonable estimate of the loss (or, if the estimate of the loss is a range, and no amount within the range is considered to be a better estimate than any other amount, the minimum amount in the range is recorded). If an unfavorable outcome is reasonably possible but less than probable, or the amount of loss cannot be reasonably estimated, then the matter is disclosed and no liability is recorded. Legal matters are reviewed on a continuous basis to determine if there has been a change in management’s judgment regarding the likelihood and/or estimate of a potential loss.
Concentration of credit and business risks	Concentration of credit and business risks—We sell to customers in a broad mix of industries and are exposed to credit risk in the event of nonpayment. Changes in these industries or other developments may significantly affect our financial performance and management's estimates. We mitigate our exposure to credit risk by performing ongoing credit evaluations and, when deemed necessary, requiring letters of credit, credit insurance, prepayments, guarantees or other collateral. No individual customer represented more than 10% of our receivables as of December 31, 2025, or 2024, or sales for any of the three years ended December 31, 2025.
Recently Issued Accounting Standards and Disclosure Rules	Recently Issued Accounting Standards and Disclosure Rules—In November 2024, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update No. 2024-03 (“ASU 2024-03”), Disaggregation of Income Statement Expenses (“DISE”). ASU 2024-03 requires disaggregated disclosure of income statement expenses for public business entities. ASU 2024-03 does not change the expense captions an entity presents on the face of the income statement; rather, it requires disaggregation of certain expense captions into specified categories in disclosures within the footnotes to the financial statements. As revised by ASU No. 2025-01, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures, the provisions of ASU 2024-03 are effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. With the exception of expanding disclosures to include more granular income statement expense categories, we do not expect the adoption of ASU 2024-03 to have a material effect on our consolidated financial statements taken as a whole. In September 2025, the FASB issued ASU No. 2025-06, Targeted Improvements to the Accounting for Internal-Use Software. ASU 2025-06 amends certain aspects of the accounting for software costs under ASC 350-40. ASU 2025-06 makes targeted improvements to ASC 350-40, but does not fully align the framework for accounting for internally developed software costs that are subject to ASC 350-40 with the framework applied to software to be sold or marketed externally that is subject to ASC 985-20. ASU 2025-06 also does not amend the guidance on costs of software licenses that are within the scope of ASC 985-20. ASU 2025-06’s amendments are effective for all entities for annual reporting periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods. The Company is still evaluating the impact that the adoption of ASU 2025-06 will have on the condensed consolidated financial statements. In November 2025, the FASB issued ASU 2025‑09, Derivatives and Hedging (Topic 815): Hedge Accounting Improvements. The amendments are intended to improve the clarity, operability, and decision‑usefulness of hedge accounting guidance. ASU 2025‑09 is effective for the Company for annual and interim reporting periods beginning after December 15, 2026 with early adoption permitted. The Company is currently evaluating the impact of ASU 2025‑09 on its consolidated financial statements and related disclosures. Because the guidance primarily relates to hedge accounting mechanics and presentation, the Company does not expect the adoption of this update to have a material effect on our consolidated financial statements taken as a whole.

Pensions and Other Post-retirement Benefits - Accumulated Benefit Obligation in Excess of Plan Assets (Detail) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Aggregate accumulated benefit obligations (ABO)	$ 128,023	$ 117,299
Aggregate fair value of plan assets	$ 2,416	$ 3,334

Segment Information - Geographic Information on Property (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 283,063	$ 211,865
Property, plant, equipment, and operating leases, net	339,993	267,948	$ 265,175
United States
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	177,507	160,760	156,937
United Kingdom
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	28,627	30,274	24,740
Other
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	68,629	59,716	64,902
Germany
Long-Lived Assets by Geographical Areas [Line Items]
Property, plant and equipment, net	$ 65,230	$ 17,198	$ 18,596

Income Taxes - Reconciliation Between U.S. Federal Income Tax Rate and Effective Tax Rate Current Year (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
U.S. federal statutory income tax	$ 76,944
State and local income taxes, net of federal income tax effect	6,652
Foreign tax effects	5,700
Effect of cross-border tax laws	(149)
Tax credits	(3,891)
Nontaxable or nondeductible items	2,606
Changes in unrecognized tax benefits	(420)
Other	32
Provision for income taxes	$ 87,474	$ 90,039	$ 148,105
Percent
U.S. federal income tax rate	21.00%	21.00%	21.00%
State income taxes-U.S.	1.80%	2.90%	3.70%
Foreign tax effects	1.60%	1.10%	(0.60%)
Effect of cross-border tax laws	0.00%
Tax credits	(1.10%)
Nondeductible compensation	0.70%	0.50%	1.90%
Changes in unrecognized tax benefits	(0.10%)
Other	0.00%	0.80%	0.90%
Effective income tax rate	23.90%	24.00%	71.60%

Derivative Financial Instruments - Income Statement Location And Impact Of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Foreign exchange contracts: currency exchange losses, net \| Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange contracts: currency exchange losses, net	$ (4,370)	$ 9,139

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4C
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
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-Name Accounting Standards Codification
-Section 55
-Paragraph 182
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-182

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (a)(5)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-Section 50
-Paragraph 4D
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-Paragraph 4A
-Subparagraph (b)(1)
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-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (a)(6)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4D

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 4C
-Subparagraph (b)
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-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4CCC
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CCC

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4CCC
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CCC

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4CCC
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CCC

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
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Reference 16: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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-Name Accounting Standards Codification
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Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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Reference 21: http://www.xbrl.org/2003/role/disclosureRef
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Reference 22: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E

+ Details

Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Balance Sheet Location and Fair Value of Assets and Liabilities Associated with Derivative Financial Instruments

The following table presents the Consolidated Balance Sheets location and fair value of assets and liabilities associated with derivative financial instruments:


	December 31,
(In thousands)	2025		2024
Derivatives not designated as hedging instruments:
Foreign exchange contracts: prepaid expenses and other current assets	$	—	$	175
Foreign exchange contracts: other current liabilities	$	392	$	1,111

Derivatives designated as cash flow hedges:
Foreign exchange contracts: prepaid expenses and other current assets	$	105	$	—
Foreign exchange contracts: other current liabilities	$	320	$	—

Income Statement Location and Impact of Derivative Financial Instruments

Consolidated Statements of Income and Consolidated Statements of Cash Flows:


	Year ended December 31,
	2025		2024
Derivatives not designated as hedging instruments:
Foreign exchange contracts: currency exchange losses, net	$	(4,370)	$	9,139

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Dec. 31, 2025
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Components of Income before Income Taxes


(In thousands)	2025		2024		2023
Components of income before income taxes
U.S. income	$	242,979	$	243,129	$	80,229
Non-U.S. income	123,419		131,877		126,459
Income before income taxes	$	366,398	$	375,006	$	206,688
Provision for income taxes
Current
Federal	$	46,980	$	47,060	$	49,642
State	9,981		12,868		9,510
Non-U.S.	35,475		30,209		27,101
Total current provision	$	92,436	$	90,137	$	86,253
Deferred
Federal	$	2,666	$	(3,141)	$	54,272
State	(1,503)		1,046		12,914
Non-U.S.	(6,125)		1,997		(5,334)
Total deferred provision (benefit)	(4,962)		(98)		61,852
Provision for income taxes	$	87,474	$	90,039	$	148,105

Reconciliation of U.S. Federal Income Tax Rates to Effective Tax Rate

Below is a tabular rate reconciliation pursuant to the disclosure requirements of ASU 2023-09 for the year ended December 31, 2025:


	2025
(in thousands, except percentages)	Amount		Percent
U.S. federal statutory income tax	$	76,944	21.0	%
State and local income taxes, net of federal income tax effect(1)	6,652		1.8	%
Foreign tax effects	5,700		1.6	%
Nontaxable or nondeductible items	2,606		0.7	%
Effect of cross-border tax laws	(149)		—	%
Tax credits	(3,891)		(1.1)	%
Changes in unrecognized tax benefits	(420)		(0.1)	%
Other	32		—	%
Provision for income taxes	$	87,474	23.9	%
(1)The states that contribute to the majority (greater than 50%) of the tax effect in this category include California, Illinois, Maryland, Indiana, New Hampshire, Pennsylvania and Wisconsin.

Below is a reconciliation of the U.S. federal income tax rates to the Company's effective tax rate for the years ended December 21, 2024 and 2023:


	2024		2023
U.S. federal income tax rate	21.0	%	21.0	%
State income taxes-U.S.	2.9	%	3.7	%
Taxes on non-U.S. income	1.1	%	(0.6)	%
Nondeductible compensation	0.5	%	1.9	%
Divestiture (Note 21)	—	%	46.6	%
Valuation allowances	(1.2)	%	(0.2)	%
Research and development credit	(0.7)	%	(0.8)	%
Employee share-based payments	(0.2)	%	(0.4)	%
Taxes on non-U.S. income - U.S., Canadian & European reorganization	(0.1)	%	(0.5)	%
Foreign exchange on entity closures	(0.1)	%	—	%

Other	0.8	%	0.9	%
Effective income tax rate	24.0	%	71.6	%

Components of Deferred Tax Assets and Liabilities

Components of deferred tax assets and liabilities:


	December 31,
(In thousands)	2025		2024
Deferred tax assets
Capitalized research and development	$	33,915	$	31,030

Inventory	9,184		9,434
Net operating losses and tax credit carryforwards	8,078		6,715
Share-based compensation	5,039		6,149
Accrued expenses and other reserves	6,419		5,006
Reserve for doubtful accounts	1,391		1,071

Other	5,847		2,177
Total deferred tax assets	69,873		61,582
Valuation allowances	(4,464)		(4,815)
Net deferred tax assets	$	65,409	$	56,767
Deferred tax liabilities
Goodwill and intangibles	$	(98,104)	$	(79,917)
Employee benefits	(54,923)		(41,399)
Property, plant and equipment	(16,992)		(15,461)

Other	(1,939)		(1,501)
Total deferred tax liabilities	(171,958)		(138,278)
Net deferred taxes	$	(106,549)	$	(81,511)

Reconciliation of Change In Tax Liability for Unrecognized Tax Benefits

A reconciliation of the change in the tax liability for unrecognized tax benefits for the years ended December 31, 2025 and 2024 is as follows:


(In thousands)	2025		2024
Beginning balance	$	1,270	$	3,084
Adjustments for tax positions related to the current year	—		51
Adjustments for tax positions related to prior years	3,347		(607)
Settlements	(194)		(929)
Statute expiration	(138)		(329)
Ending balance	$	4,285	$	1,270

Schedule of Cash Flow, Supplemental Disclosures

Disclosed below is a summary of income taxes paid by jurisdiction pursuant to the disclosure requirements of ASU 2023-09 for the year ended December 31, 2025:


(in thousands)	2025
United States - Federal	$	48,993
United States - State and local	11,798
Brazil	7,900
Switzerland	7,372
Germany	5,375
Other	20,167
Total	$	101,605