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Long Term Debt - Summary Parenthetical (Detail)
Dec. 31, 2014
Senior Unsecured Notes  
Long Term Debt [Line Items]  
Fixed rate, note 9.75%us-gaap_LongTermDebtPercentageBearingFixedInterestRate
/ us-gaap_LongtermDebtTypeAxis
= dco_UnsecuredSeniorNotesMember
Senior Secured Term Loan  
Long Term Debt [Line Items]  
Floating rate, note 4.75%us-gaap_LongTermDebtPercentageBearingVariableInterestRate
/ us-gaap_LongtermDebtTypeAxis
= dco_SecuredTermLoanMember
Promissory Note  
Long Term Debt [Line Items]  
Fixed rate, note 5.00%us-gaap_LongTermDebtPercentageBearingFixedInterestRate
/ us-gaap_LongtermDebtTypeAxis
= dco_PromissoryNoteMember
Other Debt  
Long Term Debt [Line Items]  
Fixed rate, note 5.41%us-gaap_LongTermDebtPercentageBearingFixedInterestRate
/ us-gaap_LongtermDebtTypeAxis
= dco_OtherDebtMember