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Segment Information - Schedule of Reportable Segment Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Segment Reporting Information [Line Items] |  |
Sales to external customers | $ 256,708us-gaap_SalesRevenueNet | $ 265,045us-gaap_SalesRevenueNet
Intercompany sales | 0msa_IntercompanySales | 0msa_IntercompanySales
Net income (loss): |  |
Continuing operations | 9,316us-gaap_IncomeLossFromContinuingOperations | 13,522us-gaap_IncomeLossFromContinuingOperations
Discontinued operations | 366us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | 504us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
North American Segment |  |
Segment Reporting Information [Line Items] |  |
Sales to external customers | 133,564us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = msa_NorthAmericanSegmentMember | 129,521us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = msa_NorthAmericanSegmentMember
Intercompany sales | 35,739msa_IntercompanySales / us-gaap_StatementBusinessSegmentsAxis = msa_NorthAmericanSegmentMember | 27,897msa_IntercompanySales / us-gaap_StatementBusinessSegmentsAxis = msa_NorthAmericanSegmentMember
Net income (loss): |  |
Continuing operations | 14,431us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = msa_NorthAmericanSegmentMember | 14,260us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = msa_NorthAmericanSegmentMember
Discontinued operations | 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_StatementBusinessSegmentsAxis = msa_NorthAmericanSegmentMember | 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_StatementBusinessSegmentsAxis = msa_NorthAmericanSegmentMember
European Segment |  |
Segment Reporting Information [Line Items] |  |
Sales to external customers | 66,013us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = msa_EuropeanSegmentMember | 74,938us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = msa_EuropeanSegmentMember
Intercompany sales | 46,109msa_IntercompanySales / us-gaap_StatementBusinessSegmentsAxis = msa_EuropeanSegmentMember | 28,858msa_IntercompanySales / us-gaap_StatementBusinessSegmentsAxis = msa_EuropeanSegmentMember
Net income (loss): |  |
Continuing operations | (4,437)us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = msa_EuropeanSegmentMember | 3,452us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = msa_EuropeanSegmentMember
Discontinued operations | 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_StatementBusinessSegmentsAxis = msa_EuropeanSegmentMember | 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_StatementBusinessSegmentsAxis = msa_EuropeanSegmentMember
International Segment |  |
Segment Reporting Information [Line Items] |  |
Sales to external customers | 57,131us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = msa_InternationalSegmentMember | 60,586us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = msa_InternationalSegmentMember
Intercompany sales | 5,438msa_IntercompanySales / us-gaap_StatementBusinessSegmentsAxis = msa_InternationalSegmentMember | 3,849msa_IntercompanySales / us-gaap_StatementBusinessSegmentsAxis = msa_InternationalSegmentMember
Net income (loss): |  |
Continuing operations | 3,662us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = msa_InternationalSegmentMember | 4,591us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = msa_InternationalSegmentMember
Discontinued operations | 366us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_StatementBusinessSegmentsAxis = msa_InternationalSegmentMember | 504us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_StatementBusinessSegmentsAxis = msa_InternationalSegmentMember
Corporate Segment |  |
Segment Reporting Information [Line Items] |  |
Sales to external customers | 0us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | 0us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Intercompany sales | 0msa_IntercompanySales / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | 0msa_IntercompanySales / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Net income (loss): |  |
Continuing operations | (4,837)us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | (7,886)us-gaap_IncomeLossFromContinuingOperations / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Discontinued operations | 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Segment Reconciling Items |  |
Segment Reporting Information [Line Items] |  |
Sales to external customers | 0us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | 0us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Intercompany sales | (87,286)msa_IntercompanySales / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | (60,604)msa_IntercompanySales / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Net income (loss): |  |
Continuing operations | 497us-gaap_IncomeLossFromContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | (895)us-gaap_IncomeLossFromContinuingOperations / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember
Discontinued operations | $ 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | $ 0us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember

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- Definition Intercompany sales. + References No definition available. + Details
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- Definition Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
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