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Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Sep. 27, 2014
Jun. 28, 2014
Mar. 29, 2014
Sep. 28, 2013
Jun. 29, 2013
Mar. 30, 2013
Goodwill And Intangible Assets [Line Items]                  
Goodwill $ 157,569,000us-gaap_Goodwill $ 157,569,000us-gaap_Goodwill   $ 157,569,000us-gaap_Goodwill $ 157,569,000us-gaap_Goodwill $ 157,569,000us-gaap_Goodwill $ 157,569,000us-gaap_Goodwill $ 157,569,000us-gaap_Goodwill $ 157,569,000us-gaap_Goodwill
Amortization expense of intangible asset 10,400,000us-gaap_AmortizationOfIntangibleAssets 10,900,000us-gaap_AmortizationOfIntangibleAssets 11,500,000us-gaap_AmortizationOfIntangibleAssets            
Minimum                  
Goodwill And Intangible Assets [Line Items]                  
Acquired intangible assets amortization period 3 years                
Maximum                  
Goodwill And Intangible Assets [Line Items]                  
Acquired intangible assets amortization period 18 years                
Ducommun AeroStructures                  
Goodwill And Intangible Assets [Line Items]                  
Goodwill 57,243,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= dco_DucommunAeroStructuresMember
57,243,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= dco_DucommunAeroStructuresMember
             
Percentage exceeded from carrying value 44.00%dco_FairValueInExcessOfCarryingValuePercentage
/ us-gaap_StatementBusinessSegmentsAxis
= dco_DucommunAeroStructuresMember
               
La Barge                  
Goodwill And Intangible Assets [Line Items]                  
Goodwill 92,000,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= dco_LaBargeMember
               
Percentage exceeded from carrying value 36.00%dco_FairValueInExcessOfCarryingValuePercentage
/ us-gaap_StatementBusinessSegmentsAxis
= dco_LaBargeMember
               
Miltec                  
Goodwill And Intangible Assets [Line Items]                  
Goodwill 8,400,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= dco_MiltecMember
               
Percentage exceeded from carrying value 44.00%dco_FairValueInExcessOfCarryingValuePercentage
/ us-gaap_StatementBusinessSegmentsAxis
= dco_MiltecMember
               
Trade names                  
Goodwill And Intangible Assets [Line Items]                  
Indefinite-lived intangible asset $ 32,900,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
$ 32,900,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember