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Segment Information - Geographic Information on Long-lived Assets (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Long-Lived Assets by Geographical Areas [Line Items] |  |  |
Long-lived assets | $ 151,352 us-gaap_PropertyPlantAndEquipmentNet | $ 152,755 us-gaap_PropertyPlantAndEquipmentNet | $ 147,465 us-gaap_PropertyPlantAndEquipmentNet
United States |  |  |
Long-Lived Assets by Geographical Areas [Line Items] |  |  |
Long-lived assets | 85,247 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US | 82,274 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US | 82,820 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_US
Germany |  |  |
Long-Lived Assets by Geographical Areas [Line Items] |  |  |
Long-lived assets | 17,654 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_DE | 16,882 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_DE | 8,781 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_DE
China |  |  |
Long-Lived Assets by Geographical Areas [Line Items] |  |  |
Long-lived assets | 15,128 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_CN | 16,010 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_CN | 14,780 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = country_CN
Other Country |  |  |
Long-Lived Assets by Geographical Areas [Line Items] |  |  |
Long-lived assets | $ 33,323 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = msa_OtherCountryMember | $ 37,589 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = msa_OtherCountryMember | $ 41,084 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = msa_OtherCountryMember

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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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