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Goodwill, Trademarks and Other Intangible Assets (Details 2) (New Colt, USD $)
In Thousands, unless otherwise specified
 0 Months Ended
Jul. 12, 2013
Jul. 12, 2013
Acquired finite-lived intangible assets:    
Acquired finite-lived intangible assets   $ 9,340us-gaap_FinitelivedIntangibleAssetsAcquired1
License agreements    
Acquired finite-lived intangible assets:    
Acquired finite-lived intangible assets   5,240us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_BusinessAcquisitionAxis
= coltdef_NewColtHoldingCorpMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember
Weighted-average useful lives of acquired assets 6 years  
Developed technology    
Acquired finite-lived intangible assets:    
Acquired finite-lived intangible assets   2,970us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_BusinessAcquisitionAxis
= coltdef_NewColtHoldingCorpMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_DevelopedTechnologyRightsMember
Weighted-average useful lives of acquired assets 20 years  
Backlog    
Acquired finite-lived intangible assets:    
Acquired finite-lived intangible assets   $ 1,130us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_BusinessAcquisitionAxis
= coltdef_NewColtHoldingCorpMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_OrderOrProductionBacklogMember
Weighted-average useful lives of acquired assets 3 years