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Long Term Debt - Summary (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Sep. 27, 2014
Jun. 28, 2014
Mar. 29, 2014
Dec. 31, 2013
Sep. 28, 2013
Jun. 29, 2013
Mar. 30, 2013
Long Term Debt [Line Items]                
Total Debt $ 290,052us-gaap_DebtLongtermAndShorttermCombinedAmount       $ 332,702us-gaap_DebtLongtermAndShorttermCombinedAmount      
Less current portion 26us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 26us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 26us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 25us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 25us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 3,029us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 3,033us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 3,038us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
Total long-term debt 290,026us-gaap_LongTermDebtAndCapitalLeaseObligations 310,157us-gaap_LongTermDebtAndCapitalLeaseObligations 317,664us-gaap_LongTermDebtAndCapitalLeaseObligations 325,171us-gaap_LongTermDebtAndCapitalLeaseObligations 332,677us-gaap_LongTermDebtAndCapitalLeaseObligations 340,184us-gaap_LongTermDebtAndCapitalLeaseObligations 347,690us-gaap_LongTermDebtAndCapitalLeaseObligations 355,196us-gaap_LongTermDebtAndCapitalLeaseObligations
Weighted-average interest rate 8.20%us-gaap_LongtermDebtWeightedAverageInterestRate       7.76%us-gaap_LongtermDebtWeightedAverageInterestRate      
Senior Unsecured Notes                
Long Term Debt [Line Items]                
Long-Term Debt 200,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= dco_UnsecuredSeniorNotesMember
      200,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= dco_UnsecuredSeniorNotesMember
     
Senior Secured Term Loan                
Long Term Debt [Line Items]                
Long-Term Debt 90,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= dco_SecuredTermLoanMember
      132,625us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= dco_SecuredTermLoanMember
     
Promissory note and Other Debt                
Long Term Debt [Line Items]                
Long-Term Debt $ 52us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
      $ 77us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember