Fair Value Disclosures [Abstract]
Fair Value Measurements
Fair Value, Measurement Inputs, Disclosure [Text Block]
Segment Reporting [Abstract]
Schedule of Reportable Segment Information
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Percentage of Total Sales by Product Group
Revenue from External Customers by Products and Services [Table Text Block]
Document And Entity Information [Abstract]
Document And Entity Information [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Scenario, Forecast
Scenario, Forecast [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
Federal Funds Open Rate
Federal Funds Open Rate [Member]
Federal Funds Open Rate [Member]
London Interbank Offered Rate (LIBOR)
London Interbank Offered Rate (LIBOR) [Member]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Line of Credit
Line of Credit [Member]
Notes Payable
Notes Payable, Other Payables [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Multi-currency Notes Due in 2031
Multi-currency Notes Due in 2031 [Member]
Multi-currency Notes Due in 2031 [Member]
2006 Senior Notes Payable Through 2021, 5.41%
Senior Notes Payable Through Two Thousand Twenty One Five Point Fourty One Percentage [Member]
Senior notes payable through two thousand twenty one five point fourty one percentage.
Senior Revolving Credit Facility Maturing in 2020
Senior Revolving Credit Facility Maturing in 2020 [Member]
Senior Revolving Credit Facility Maturing in 2020 [Member]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Standby Letters of Credit
Standby Letters of Credit [Member]
Revolving Credit Facility
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Interest rate margin, percentage
Debt Instrument, Basis Spread on Variable Rate
Weighted average revolving interest rate, percentage
Line of Credit Facility, Interest Rate During Period
Line of credit facility, remaining borrowing capacity
Line of Credit Facility, Remaining Borrowing Capacity
Line of credit facility, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Aggregate principal amount
Debt Instrument, Face Amount
Annual installment debt payments
Debt Instrument, Periodic Payment
Debt instrument, stated interest rate percentage
Debt Instrument, Interest Rate, Stated Percentage
Minimum fixed charges coverage ratio (not less than)
Debt Instrument, Covenant, Fixed Charges Coverage Ratio, Minimum
Debt Instrument, Covenant, Fixed Charges Coverage Ratio, Minimum
Maximum consolidated leverage ratio (not to exceed)
Debt Instrument, Covenant, Consolidated Leverage Ratio, Maximum
Debt Instrument, Covenant, Consolidated Leverage Ratio, Maximum
Proceeds from lines of credit
Letters of Credit Outstanding, Amount
Debt instrument, collateral amount
Debt Instrument, Collateral Amount
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Reportable Segments
Operating Segments [Member]
Reconciling Items
Segment Reconciling Items [Member]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Americas
Americas [Member]
International
International Segment [Member]
International Segment [Member]
Corporate
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Sales to external customers
Revenue, Net
Intercompany sales
Intercompany Sales
Intercompany sales.
Operating income
Operating Income (Loss)
Restructuring charges (Note 5)
Restructuring Charges
Currency exchange losses, net
Foreign Currency Transaction Gain (Loss), before Tax
Other operating expense (Note 19)
Other Cost and Expense, Operating
Strategic Transaction Costs
Strategic Transaction Costs
Strategic Transaction and Corporate Development Costs
Adjusted operating income (loss)
Operating Income (Loss), Adjusted
Operating Income (Loss), Adjusted
Adjusted operating margin %
Adjusted Operating Margin Percent
Adjusted Operating Margin Percent
Revenue from External Customers by Products and Services [Table]
Revenue from External Customers by Products and Services [Table]
International
International [Member]
International.
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Sales
Sales [Member]
Products and Services [Axis]
Products and Services [Axis]
Products and Services [Domain]
Products and Services [Domain]
Breathing Apparatus
Breathing Apparatus [Member]
Breathing Apparatus [Member]
Fixed Gas & Flame Detection
Fix Gas & Flame Detection Instruments [Member]
Fix Gas & Flame Detection Instruments [Member]
Portable Gas Detection
Portable Instruments [Member]
Portable Instruments [Member]
Industrial Head Protection
Head Protection [Member]
Head Protection [Member]
Fall Protection [Member]
Fall Protection [Member]
Fall Protection [Member]
Firefighter Helmets and Protective Apparel
Firefighter Helmets and Protective Apparel [Member]
Firefighter Helmets and Protective Apparel [Member]
Other
Other Products [Member]
Other Products [Member]
Revenue from External Customer [Line Items]
Revenue from External Customer [Line Items]
Concentration risk percentage
Concentration Risk, Percentage
Net sales
Statement of Stockholders' Equity [Abstract]
Statement [Table]
Statement [Table]
Equity Components [Axis]
Equity Components [Axis]
Equity Component [Domain]
Equity Component [Domain]
Accumulated Other Comprehensive (Loss)
AOCI Attributable to Parent [Member]
Statement [Line Items]
Statement [Line Items]
Tax on pension and post-retirement plan adjustments
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Globe Holding Company LLC
Globe Holding Company LLC [Member]
Globe Holding Company LLC [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Net sales
Business Acquisition, Pro Forma Revenue
Net income
Business Acquisition, Pro Forma Net Income (Loss)
Basic earnings per share
Business Acquisition, Pro Forma Earnings Per Share, Basic
Diluted earnings per share
Business Acquisition, Pro Forma Earnings Per Share, Diluted
Statement of Financial Position [Abstract]
Assets
Assets [Abstract]
Current assets
Assets, Current [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Trade receivables, less allowance for doubtful accounts of $5,786 and $5,540
Accounts Receivable, Net, Current
Inventories (Note 4)
Inventory, Net
Prepaid income taxes
Income Taxes Receivable, Current
Notes receivable, insurance companies (Note 19)
Notes, Loans and Financing Receivable, Net, Insurance Companies, Current
Notes, Loans and Financing Receivable, Net, Insurance Companies, Current
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Total current assets
Assets, Current
Property, plant and equipment, net (Note 6)
Property, Plant and Equipment, Net
Prepaid pension cost
Assets for Plan Benefits, Defined Benefit Plan
Deferred tax assets (Note 11)
Deferred Tax Assets, Net of Valuation Allowance
Goodwill (Note 14)
Goodwill
Intangible assets (Note 14)
Finite-Lived Intangible Assets, Net
Notes receivable, insurance companies, noncurrent (Note 19)
Notes, Loans and Financing Receivable, Net, Insurance Companies, Noncurrent
Notes, Loans and Financing Receivable, Net, Insurance Companies, Noncurrent
Insurance receivable (Note 19) and other noncurrent assets
Other Assets, Noncurrent
Total assets
Assets
Liabilities
Liabilities [Abstract]
Current liabilities
Liabilities, Current [Abstract]
Notes payable and current portion of long-term debt, net (Note 13)
Debt, Current
Accounts payable
Accounts Payable, Current
Employees’ compensation
Employee-related Liabilities, Current
Insurance and product liability (Note 19)
Liability for Claims and Claims Adjustment Expense
Income taxes payable (Note 11)
Accrued Income Taxes, Current
Warranty reserve (Note 19) and other current liabilities
Other Liabilities, Current
Total current liabilities
Liabilities, Current
Long-term debt, net (Note 13)
Long-term Debt, Excluding Current Maturities
Pensions and other employee benefits
Liability, Defined Benefit Plan, Noncurrent
Deferred tax liabilities (Note 11)
Deferred Income Tax Liabilities, Net
Product liability (Note 19) and other noncurrent liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
Commitments and contingencies (Note 19)
Commitments and Contingencies
Equity
Stockholders' Equity Attributable to Parent [Abstract]
Equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred stock, 4 1/2% cumulative, $50 par value (Note 8)
Preferred Stock, Value, Outstanding
Common stock, no par value (Note 8)
Common Stock, Value, Outstanding
Treasury shares, at cost (Note 8)
Treasury Stock, Value
Accumulated other comprehensive loss (Note 7)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Retained earnings
Retained Earnings (Accumulated Deficit)
Total MSA Safety Incorporated shareholders' equity
Stockholders' Equity Attributable to Parent
Noncontrolling interests
Stockholders' Equity Attributable to Noncontrolling Interest
Total shareholders’ equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Total liabilities and shareholders’ equity
Liabilities and Equity
Accounting Policies [Abstract]
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Adjustments for New Accounting Pronouncements [Axis]
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption [Domain]
Type of Adoption [Domain]
Accounting Standards Update 2016-09
Accounting Standards Update 2016-09 [Member]
Accounting Standards Update 2016-16
Accounting Standards Update 2016-16 [Member]
Accounting Standards Update 2016-18
Accounting Standards Update 2016-18 [Member]
Accounting Standards Update 2017-07
Accounting Standards Update 2017-07 [Member]
Accounting Standards Update 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Undiscounted future minimum rent commitments under noncancellable leases
Operating Leases, Future Minimum Payments Due
Additional discrete tax benefit
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense
Cumulative-effect adjustment to retained earnings
Cumulative Effect of New Accounting Principle in Period of Adoption
Net Cash Provided by (Used in) Financing Activities
Net Cash Provided by (Used in) Financing Activities
Decrease in operating income
Decrease in operating income
Decrease in operating income
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived Intangible Assets [Roll Forward]
Finite-lived Intangible Assets [Roll Forward]
January 1, 2018
Amortization expense
Amortization of Intangible Assets
Currency translation
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)
June 30, 2018
Retirement Benefits [Abstract]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]
Change in Accounting Estimate by Type [Axis]
Change in Accounting Estimate by Type [Axis]
Change in Accounting Estimate, Type [Domain]
Change in Accounting Estimate, Type [Domain]
Change in Assumptions for Defined Benefit Plans
Change in Assumptions for Defined Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Pension plans contributions
Defined Benefit Plan, Plan Assets, Contributions by Employer
Total estimated pension plans contributions for the fiscal year
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year
Pensions and Other Post-retirement Benefits
Pension and Other Postretirement Benefits Disclosure [Text Block]
Retained Earnings
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Foreign currency translation adjustments
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Pension and post-retirement plan actuarial gains, net of tax (Note 7)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Reclassification from accumulated other comprehensive (loss) into earnings
Translation Adjustment Functional to Reporting Currency, Gain (Loss), Reclassified to Earnings, Net of Tax
(Income) loss attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
(Income) loss attributable to noncontrolling interests
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Common dividends
Dividends, Common Stock, Stock
Preferred dividends
Dividends, Preferred Stock, Stock
Cumulative effect of the adoption of ASU 2016-16 (Note 2)
Ending Balance
Changes in Goodwill
Schedule of Goodwill [Table Text Block]
Changes in Intangible Assets, Net of Accumulated Amortization
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Goodwill, Impairment Loss
Goodwill, Impairment Loss
Goodwill [Roll Forward]
Goodwill [Roll Forward]
January 1, 2018
Currency translation
Goodwill, Foreign Currency Translation Gain (Loss)
June 30, 2018
Schedule of Fair Value of Assets Acquired and Liabilities Assumed
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Schedule of Pro Forma Financial Information
Business Acquisition, Pro Forma Information [Table Text Block]
Segment Information
Segment Reporting Disclosure [Text Block]
Statement of Cash Flows [Abstract]
Operating Activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income
Depreciation and amortization
Depreciation, Depletion and Amortization
Restructuring charges (Note 5)
Other Restructuring Costs
Stock-based compensation (Note 12)
Share-based Compensation
Pension expense (Note 16)
Pension Cost (Reversal of Cost)
Deferred income tax benefit (Note 11)
Deferred Income Tax Expense (Benefit), Including Discontinued Operations
Deferred Income Tax Expense (Benefit), Including Discontinued Operations
Loss on asset dispositions, net
Gain (Loss) on Disposition of Other Assets
Pension contributions (Note 16)
Payment for Pension Benefits
Currency exchange losses, net
Foreign Currency Transaction Gain (Loss), Including Discontinued Operations, before Tax
Foreign Currency Transaction Gain (Loss), Including Discontinued Operations, before Tax
Other operating expense (Note 19)
Other Operating Activities, Cash Flow Statement
Trade receivables
Increase (Decrease) in Accounts Receivable
Inventories (Note 4)
Increase (Decrease) in Inventories
Prepaid expenses and other current assets
Increase (Decrease) in Other Operating Assets
Accounts payable and accrued liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Other noncurrent assets and liabilities
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Cash Flow From Operating Activities
Net Cash Provided by (Used in) Operating Activities
Investing Activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Capital expenditures
Payments to Acquire Property, Plant, and Equipment
Property disposals
Payments for (Proceeds from) Other Investing Activities
Cash Flow Used in Investing Activities
Net Cash Provided by (Used in) Investing Activities
Financing Activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from short-term debt, net
Proceeds from (Repayments of) Short-term Debt
Proceeds from long-term debt (Note 13)
Proceeds from Issuance of Long-term Debt
Payments on long-term debt (Note 13)
Repayments of Long-term Debt
Cash dividends paid
Payments of Dividends
Company stock purchases (Note 8)
Payments for Repurchase of Equity
Exercise of stock options (Note 8)
Proceeds from Stock Options Exercised
Employee stock purchase plan (Note 8)
Proceeds from Stock Plans
Cash Flow Used in Financing Activities
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Effect of Exchange Rate on Cash and Cash Equivalents
(Decrease) increase in cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Beginning cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Ending cash, cash equivalents and restricted cash
Restricted cash included in prepaid expenses and other current assets
Restricted Cash, Current Assets, Included in Prepaid Expenses and Other Current Assets
Restricted Cash, Current Assets, Included in Prepaid Expenses and Other Current Assets
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment
Property, Plant and Equipment Disclosure [Text Block]
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type [Axis]
Equity Award [Domain]
Performance Stock Unit
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Unvested, beginning balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Performance adjustments (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Adjustment In Period
Share-based compensation arrangement by share-based payment award equity instruments other than options performance adjustment in period.
Vested (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
Unvested, ending balance (in shares)
Weighted Average Exercise Price (dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested, beginning balance (dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Granted (dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Performance adjustments (dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Adjustment In Period Weighted Average Grant Date Fair Value
Share-based compensation arrangement by share-based payment award equity instruments other than options performance adjustment in period, weighted average grant date fair value.
Vested (dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Unvested, ending Balance (dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Acquisitions
Business Combination Disclosure [Text Block]
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Restructuring Plan [Axis]
Restructuring Plan [Axis]
Restructuring Plan [Domain]
Restructuring Plan [Domain]
Voluntary Retirement Incentive Package
Voluntary Retirement Incentive Package [Member]
Voluntary Retirement Incentive Package [Member]
Restructuring Type [Axis]
Restructuring Type [Axis]
Type of Restructuring [Domain]
Type of Restructuring [Domain]
Special Termination Benefits
Special Termination Benefits [Member]
Segments [Axis]
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Currency translation and other adjustments
Restructuring Reserve, Accrual Adjustment
Severance costs
Severance Costs
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Recently Adopted and Recently Issued Accounting Standards [Abstract]
Recently Adopted and Recently Issued Accounting Standards [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
Outstanding, beginning balance (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Outstanding, ending balance (in shares)
Exercisable (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Outstanding, beginning balance (dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Exercised (dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Forfeited (dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Outstanding, ending balance (dollars per share)
Exercisable (dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Statement of Comprehensive Income [Abstract]
Other comprehensive (loss) income, net of tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments (Note 7)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax
Total amount reclassified from Accumulated other comprehensive loss, net of tax
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Total other comprehensive (loss) income, net of tax
Other Comprehensive Income (Loss), Net of Tax
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Comprehensive loss (income) attributable to noncontrolling interests
Comprehensive income attributable to MSA Safety Incorporated
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Distributor relationships
Distribution Rights [Member]
Acquired technology and other intangible assets
Technology-Based Intangible Assets [Member]
Globe Holding Company LLC
Voting interest acquired (percentage)
Business Acquisition, Percentage of Voting Interests Acquired
All-cash transaction value
Business Combination, Consideration Transferred
Working capital adjustment
Business Combination, Consideration Transferred, Working Capital Adjustments
Business Combination, Consideration Transferred, Working Capital Adjustments
Acquired intangible assets, amortization period
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Estimated future amortization expense, remainder of fiscal year
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year
Estimated future amortization expense, year 1
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
Finite-Lived Intangible Assets, Amortization Expense, Year Four
Finite-Lived Intangible Assets, Amortization Expense, Year Four
Estimated future amortization expense, year 2
Finite-Lived Intangible Assets, Amortization Expense, Year Two
Estimated future amortization expense, year 3
Finite-Lived Intangible Assets, Amortization Expense, Year Three
Estimated future depreciation expense, remainder of fiscal year
Acquired Property, Plant And Equipment, Depreciation Expense, Remainder Of Fiscal Year
Acquired Property, Plant And Equipment, Depreciation Expense, Remainder Of Fiscal Year
Estimated future depreciation expense, year 1
Acquired Property, Plant And Equipment, Depreciation Expense, Next Twelve Months
Acquired Property, Plant And Equipment, Depreciation Expense, Next Twelve Months
Estimated future depreciation expense, year 2
Acquired Property, Plant And Equipment, Depreciation Expense, Year Two
Acquired Property, Plant And Equipment, Depreciation Expense, Year Two
Estimated future depreciation expense, year 3
Acquired Property, Plant And Equipment, Depreciation Expense, Year Three
Acquired Property, Plant And Equipment, Depreciation Expense, Year Three
Estimated future depreciation expense, year 4
Acquired Property, Plant And Equipment, Depreciation Expense, Year Four
Acquired Property, Plant And Equipment, Depreciation Expense, Year Four
Goodwill
Business Acquisition, Goodwill, Expected Tax Deductible Amount
Sales
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Net income
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual
Commitments and Contingencies Disclosure [Abstract]
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]
Balance beginning of period
Insurance Settlements Receivable
Additions
Loss Contingency, Receivable, Additions
Collections, settlements converted to notes receivable and other adjustments
Loss Contingency, Receivable, Proceeds
Balance end of period
Inventory Disclosure [Abstract]
Finished products
Inventory, Finished Goods, Net of Reserves
Work in process
Inventory, Work in Process, Net of Reserves
Raw materials and supplies
Inventory, Raw Materials, Net of Reserves
Inventories at current cost
FIFO Inventory Amount
Less: LIFO valuation
Inventory, LIFO Reserve
Total inventories
Restricted Stock Activity
Restricted Stock Activity [Member]
Restricted Stock Activity [Member]
Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Forfeited (in shares)
Forfeited (dollars per share)
Schedule of Debt
Schedule of Debt [Table Text Block]
Derivative [Table]
Derivative [Table]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Derivative Contract [Domain]
Derivative Contract [Domain]
Foreign Exchange Forward
Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative [Line Items]
Notional amount of open forward contracts
Derivative, Notional Amount
Contingencies
Commitments and Contingencies Disclosure [Text Block]
Restructuring Charges
Restructuring and Related Activities Disclosure [Text Block]
Components of Property, Plant and Equipment
Property, Plant and Equipment [Table Text Block]
Income Tax Contingency [Table]
Income Tax Contingency [Table]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Other Noncurrent Liabilities
Other Noncurrent Liabilities [Member]
Deferred Tax Asset
Deferred Tax Asset [Domain]
Income Tax Contingency [Line Items]
Income Tax Contingency [Line Items]
U.S. federal income tax rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit)
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Differences of Non-U.S. Subsidiaries Offset By Foreign Tax Credits
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Differences of Non-U.S. Subsidiaries Offset By Foreign Tax Credits
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Differences of Non-U.S. Subsidiaries, Offset By Foreign Tax Credits
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Adjustment During the Period
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Adjustment During the Period
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Adjustment During the Period
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Significant tax benefit related to certain share-based payments
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent
Unrecognized tax benefits
Unrecognized Tax Benefits
Accrued interest and penalties related to uncertain tax positions
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Loss Contingencies [Table]
Loss Contingencies [Table]
Loss Contingency Nature
Loss Contingency Nature [Axis]
Loss Contingency, Nature [Domain]
Loss Contingency, Nature [Domain]
Lawsuit
Lawsuit [Member]
Lawsuit [Member]
Damages from Product Defects
Damages from Product Defects [Member]
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Loss Contingency, Quantities [Roll Forward]
Loss Contingency, Quantities [Roll Forward]
Loss Contingency, Quantities [Roll Forward]
Open lawsuits, beginning of period
Loss Contingency, Pending Claims, Number
New lawsuits
Loss Contingency, New Claims Filed, Number
Settled and dismissed lawsuits
Loss Contingency, Claims Settled and Dismissed, Number
Open lawsuits, end of period
Schedule of Inventories
Schedule of Inventory, Current [Table Text Block]
Litigation Status [Axis]
Litigation Status [Axis]
Litigation Status [Domain]
Litigation Status [Domain]
Settled Litigation
Settled Litigation [Member]
Litigation Case [Axis]
Litigation Case [Axis]
Litigation Case [Domain]
Litigation Case [Domain]
North River Insurance Company
North River Insurance Company [Member]
North River Insurance Company [Member]
Other Current Liabilities
Other Current Liabilities [Member]
Single Incident
Single Incident [Member]
Single Incident [Member]
Unasserted Claim
Unasserted Claim [Member]
Cumulative Trauma
Cumulative Trauma [Member]
Cumulative Trauma [Member]
Cumulative Trauma, Reported Claims
Cumulative Trauma, Reported Claims [Member]
Cumulative Trauma, Reported Claims [Member]
Claims Settled, But Not Yet Paid
Claims Settled, But Not Yet Paid [Member]
Claims Settled, But Not Yet Paid [Member]
Claims Asserted But Not Yet Resolved
Claims Asserted But Not Yet Resolved [Member]
Claims Asserted But Not Yet Resolved [Member]
Uninsured Cumulative Trauma
Uninsured Cumulative Trauma [Member]
Uninsured cumulative trauma.
Product liability accrual
Product Liability Accrual, Component Amount
Product liability expense
Product Liability Accrual, Period Expense
Number of lawsuits
Loss contingency, years of activity
Loss Contingency, Years of Activity
Loss Contingency, Years of Activity
Payments to resolve cumulative trauma claims
Loss Contingency, Damages Paid, Value
Loss Contingency Accrual, Payments
Loss Contingency Accrual, Payments
Loss Contingency Accrual, Number of Periodic Payments
Loss Contingency Accrual, Number of Periodic Payments
Loss Contingency Accrual, Number of Periodic Payments
Number of insurance carriers
Minimum Number Of Insurance Carriers
Minimum number of insurance carriers.
Insurance receivables
Insurance receivables, current
Insurance Settlements Receivable, Current
Insurance receivables, noncurrent
Insurance Settlements Receivable, Noncurrent
Notes receivable from insurance companies
Notes, Loans and Financing Receivable, Net, Insurance Companies
Notes, Loans and Financing Receivable, Net, Insurance Companies
Notes receivable from insurance companies, current
Notes Receivables from Insurance Companies, Noncurrent
Notes Receivables from Insurance Companies, Noncurrent
Notes Receivables from Insurance Companies, Noncurrent
Gain contingency, number of policies allegedly breached
Gain Contingency, Policy Allegedly Breached, Number
Gain Contingency, Policy Allegedly Breached, Number
Litigation Settlement, Amount Awarded from Other Party
Litigation Settlement, Amount Awarded from Other Party
Damages awarded
Loss Contingency, Damages Awarded, Value
Payment received pursuant to insurance policies
Increase (Decrease) in Insurance Settlements Receivable
Product Warranty Expense
Product Warranty Expense
Number of geographic operating segments
Number of Operating Segments
Number of reportable segments
Number of Reportable Segments
Fair Value Measurements, Recurring and Nonrecurring [Table]
Fair Value Measurements, Recurring and Nonrecurring [Table]
Measurement Basis [Axis]
Measurement Basis [Axis]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Reported Value Measurement
Reported Value Measurement [Member]
Estimate of Fair Value Measurement
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, Fair value disclosure
Long-term Debt, Fair Value
Schedule of Defined Benefit Plans Disclosures [Table]
Schedule of Defined Benefit Plans Disclosures [Table]
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Pension Benefits
Pension Plan [Member]
Other Benefits
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Defined Benefit Plan, Service Cost
Interest cost
Defined Benefit Plan, Interest Cost
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Amortization of prior service cost
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Recognized net actuarial losses
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)
Settlement/curtailment loss (credit)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement
Net periodic benefit cost, excluding below
DefinedBenefitPlanNetPeriodicBenefitCostExcludingSpecialTerminationCharge
Defined Benefit Plan Net Periodic Benefit Cost Excluding Special Termination Charge
Special termination charge
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits
Net periodic benefit cost (a)
Balance Sheet Location and Fair Value of Assets Associated with Derivative Financial Instruments
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]
Income Statement Location and Impact of Derivative Financial Instruments
Derivative Instruments, Gain (Loss) [Table Text Block]
Inventories
Inventory Disclosure [Text Block]
Stock Plans
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Earnings Per Share [Abstract]
Income Statement Location [Axis]
Income Statement Location [Axis]
Income Statement Location [Domain]
Income Statement Location [Domain]
Net income
Net Income (Loss) Attributable to Parent
Preferred stock dividends
Net income available to common equity
Net Income (Loss) Available to Common Stockholders, Basic
Dividends and undistributed earnings allocated to participating securities
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic
Net income available to common shareholders
Net Income (Loss) Available to Common Stockholders, Diluted
Basic weighted-average shares outstanding
Weighted Average Number of Shares Outstanding, Basic
Stock options and other stock compensation
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Diluted weighted-average shares outstanding
Weighted Average Number of Shares Outstanding, Diluted
Antidilutive stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Earnings per share:
Earnings Per Share, Continuing Operations [Abstract]
Earnings Per Share, Continuing Operations [Abstract]
Basic
Earnings Per Share, Basic
Diluted
Earnings Per Share, Diluted
Balance beginning of period
Additions
Notes, Loans and Financing Receivable, Insurance Companies, Additions
Notes, Loans and Financing Receivable, Insurance Companies, Additions
Collections
Notes, Loans and Financing Receivable, Insurance Companies, Proceeds
Notes, Loans and Financing Receivable, Insurance Companies, Proceeds
Balance end of period
2010 Senior Notes Payable Through 2021, 4.00%
Senior Notes Payable Through Two Thousand Twenty One Four Point Zero Zero Percentage [Member]
Senior notes payable through two thousand twenty one four point zero zero percentage.
2016 Senior Notes Payable Through 2031, 3.40%
Senior Notes Payable Through Two Thousand Thirty One Three Point Four Percentage [Member] [Member]
Senior Notes Payable Through Two Thousand Thirty One Three Point Four Percentage [Member] [Member]
Senior notes payable
Senior Notes, Noncurrent
Senior revolving credit facility maturing in 2020, net of debt issuance costs
Long-term Line of Credit
Total
Long-term Debt
Amounts due within one year, net of debt issuance costs
Long-term Debt, Current Maturities
Long-term debt, net of debt issuance costs
Equity [Abstract]
Capital Stock
Stockholders' Equity Note Disclosure [Text Block]
Reclassifications Out of Accumulated Other Comprehensive Loss
Disclosure of Reclassification Amount [Text Block]
Earnings per Share
Earnings Per Share [Text Block]
Valuation Technique [Axis]
Valuation Technique [Axis]
Valuation Technique [Domain]
Valuation Technique [Domain]
Monte Carlo Approach
Monte Carlo Approach [Member]
Monte Carlo Approach [Member]
Award Type [Axis]
Equity Award [Domain]
Fair value per unit (dollars per share)
Risk-free interest rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Expected dividend yield
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Expected volatility
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
MSA stock beta
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Stock Beta
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Stock Beta
Schedule of Earnings Per Share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Plan Name [Axis]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Plan Name [Axis]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Plan Name [Axis]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Plan Name [Domain]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Plan Name [Domain]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Plan Name [Domain]
Performance Shares
Percentage of target award based on achieving targeted performance conditions
Percentage Of Target Award Based On Achieving Targeted Total Shareholder Return Based On Which Final Number Of Shares To Be Issued For Performance Stock Units
Percentage of target award based on achieving a targeted total shareholder return based on which final number of shares to be issued for performance stock units.
Fair value assumptions, average closing price used to calculate expected dividend rate, period (years)
Share-based Compensation Arrangement by Share-base Payment Award, Fair Value Assumptions, Average Closing Price Used to Calculate Expected Dividend Rate, Period
Share-based Compensation Arrangement by Share-base Payment Award, Fair Value Assumptions, Average Closing Price Used to Calculate Expected Dividend Rate, Period
Stock beta, daily price data period (years)
Share-based Compensation Arrangement by Share-base Payment Award, Fair Value Assumptions, Stock Beta, Daily Price Data, Period
Share-based Compensation Arrangement by Share-base Payment Award, Fair Value Assumptions, Stock Beta, Daily Price Data, Period
Percentage of target award based on achieving specified performance targets
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
Percentage of target award based on achieving a targeted return on net assets based on which final number of shares to be issued for performance stock units.
Award vesting period (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Significant Accounting Policies
Significant Accounting Policies [Text Block]
Summary of Cumulative Trauma Product Liability Claims Activity
Product Liability Contingencies [Table Text Block]
Summary of Insurance Receivable Balances and Activity Related to Cumulative Trauma Product Liability Losses
Summary Of Insurance Receivable Balances And Activity Related To Product Liability Losses Table [Text Block]
Summary of insurance receivable balances and activity related to product liability losses.
Schedule of Notes Receivable Balances from Insurance Companies
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Schedule of Product Warranty Liability
Schedule of Product Warranty Liability [Table Text Block]
Long-Term Debt
Debt Disclosure [Text Block]
Trade name
Trade Names [Member]
Acquired technology and other intangible assets
Current assets (including cash)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets
Cash included in current assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
Property, plant and equipment and other noncurrent assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles
Total assets acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
Total liabilities assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Net assets acquired
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net
Reclassification Out of Accumulated Other Comprehensive Loss
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Schedule of Stock Compensation Expense
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
Summary of Stock Option Activity
Share-based Compensation, Stock Options, Activity [Table Text Block]
Summary of Restricted Stock and Unit Activity
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
Schedule of Fair Value Assumptions for Units
Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block]
Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block]
Summary of Performance Stock Unit Activity
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
Components of Net Periodic Benefit Cost
Schedule of Net Benefit Costs [Table Text Block]
Stock compensation expense
Income tax benefit
Stock compensation expense, net of income tax benefit
Allocated Share-based Compensation Expense, Net of Tax
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]
Hedging Designation [Axis]
Hedging Designation [Axis]
Hedging Designation [Domain]
Hedging Designation [Domain]
Not Designated as Hedging Instrument
Not Designated as Hedging Instrument [Member]
Other Current Assets
Other Current Assets [Member]
Defined Benefit Plan, Asset Categories
Defined Benefit Plan, Asset Categories [Axis]
Plan Asset Categories [Domain]
Plan Asset Categories [Domain]
Foreign exchange contract
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Foreign exchange contracts: other current liabilities
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value
Foreign exchange contracts: other current assets
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value
Goodwill and Intangible Assets
Goodwill and Intangible Assets Disclosure [Text Block]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Currency exchange losses (gains), net
Derivative, Gain (Loss) on Derivative, Net
Schedule of Activity and Reserve Balance for Restructuring Charges by Segment
Restructuring and Related Costs [Table Text Block]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member]
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Noncontrolling Interest
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Noncontrolling Interest [Member]
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Noncontrolling Interest
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Noncontrolling Interest [Member]
Accumulated Foreign Currency Adjustment Attributable to Parent
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period
Amounts reclassified from Accumulated other comprehensive loss
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax
Tax benefit
Reclassification from AOCI, Current Period, Tax
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent
Other comprehensive income (loss)
Balance at end of period
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Revenue, Major Customer [Line Items]
Revenue, Major Customer [Line Items]
Sales through distributors
Sales Through Distributors
Sales Through Distributors
Contract with customer, percentage retained until completion
Contract With Customer, Percentage Retained Until Completion
Contract With Customer, Percentage Retained Until Completion
Contract with customer, asset
Contract with Customer, Asset, Net
Contract with customer, liability
Contract with Customer, Liability
Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type [Domain]
Property, Plant and Equipment, Type [Domain]
Land
Land [Member]
Buildings
Building [Member]
Machinery and equipment
Machinery and Equipment [Member]
Construction in progress
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross
Property, Plant and Equipment, Gross
Less: accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Net property, plant and equipment
Trade receivables, allowance for doubtful accounts
Allowance for Doubtful Accounts Receivable, Current
Common stock, par value (dollars per share)
Common Stock, No Par Value
Preferred Stock, 4 1/2% Cumulative
Preferred Stock [Member]
Preferred stock, dividend rate (percentage)
Preferred Stock, Dividend Rate, Percentage
Preferred stock, par value (dollars per share)
Preferred Stock, Par or Stated Value Per Share
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Beginning warranty reserve
Standard and Extended Product Warranty Accrual
Warranty payments
Standard Product Warranty Accrual, Decrease for Payments
Warranty claims
Standard Product Warranty Accrual, Increase for Warranties Issued
Provision for product warranties
Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties
Ending warranty reserve
Income Statement [Abstract]
Cost of products sold
Cost of Goods Sold
Gross profit
Gross Profit
Selling, general and administrative
Selling, General and Administrative Expense
Research and development
Research and Development Expense
Restructuring charges (Note 5)
Currency exchange losses, net
Interest expense
Interest Expense
Other income, net
Other Nonoperating Income (Expense)
Total other expense, net
Nonoperating Income (Expense)
Provision (benefit) for income taxes (Note 11)
Income Tax Expense (Benefit)
Net income
Net income attributable to noncontrolling interests
Net income attributable to MSA Safety Incorporated
Earnings per share attributable to MSA Safety Incorporated common shareholders:
Dividends per common share
Common Stock, Dividends, Per Share, Cash Paid
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table]
Indefinite-lived Intangible Assets [Axis]
Indefinite-lived Intangible Assets [Axis]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Indefinite-lived Intangible Assets, Major Class Name [Domain]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets
Goodwill
International
Restructuring Reserve [Roll Forward]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance
Restructuring Reserve
Restructuring charges
Restructuring Charges before Adjustments
Restructuring Charges before Adjustments - Restructuring charges before any adjustments to the accrual.
Cash payments / utilization
Payments for Restructuring
Restructuring reserve, ending balance
Schedule of Capital Units [Table]
Schedule of Capital Units [Table]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
4 1/2% Cumulative Preferred Nonvoting Stock
Cumulative Preferred Stock [Member]
Second Cumulative Preferred Voting Stock
Second Cumulative Preferred Voting Stock [Member]
Second Cumulative Preferred Voting Stock [Member]
Common Stock
Common Stock [Member]
Treasury Stock
Treasury Stock [Member]
Capital Unit [Line Items]
Capital Unit [Line Items]
Preferred stock, shares authorized (shares)
Preferred Stock, Shares Authorized
Percentage of cumulative preferred stock (percent)
Preferred stock, callable price per share (dollars per share)
Preferred Stock, Redemption Price Per Share
Preferred stock, shares issued (shares)
Preferred Stock, Shares Issued
Treasury stock, shares (shares)
Treasury Stock, Shares
Purchase of treasury shares (shares)
Treasury Stock, Shares, Acquired
Common stock, shares authorized (shares)
Common Stock, Shares Authorized
Common stock, shares issued (shares)
Common Stock, Shares, Issued
Stock issued during period, new issues (shares)
Stock Issued During Period, Shares, New Issues
Common stock, shares, outstanding (shares)
Common Stock, Shares, Outstanding
Common stock, value, issued
Stock Repurchase Program, Authorized Amount
Reissued shares (shares)
Stock Issued During Period, Shares, Share-based Compensation, Gross