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Employee Benefit Plans - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 27, 2014
Jun. 28, 2014
Mar. 29, 2014
Sep. 28, 2013
Jun. 29, 2013
Mar. 30, 2013
Jun. 28, 2014
Jun. 29, 2013
Sep. 27, 2014
Sep. 28, 2013
Dec. 31, 2014
CompensationPlan
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]                            
Number of unfunded supplemental retirement plans                     3dco_NumberOfUnfundedSupplementalRetirementPlans      
Accumulated benefit obligations                     $ 900,000dco_AccruedBenefitLiability $ 1,100,000dco_AccruedBenefitLiability    
Number of company sponsored 401(K) defined contribution plans                     2dco_NumberOfDefinedContributionPlans      
Percent of annual compensation                     3.00%dco_DefinedContributionPlanEmployerMatchingContributionPercentageofAnnualCompensation      
Provision for matching and profit sharing contribution                     3,300,000dco_ProvisionForLosses 3,100,000dco_ProvisionForLosses 3,800,000dco_ProvisionForLosses  
Estimated net actuarial loss for the defined benefit pension plan (66,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (57,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (69,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (172,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (172,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (172,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (126,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (344,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (192,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax (516,000)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax 263,000us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax 685,000us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax 720,000us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax  
Excess of accumulated benefit obligation over fair value of plan assets                     13,600,000dco_DefinedBenefitPlanPlanswithBenefitObligationsinExcessofPlanAssetsAmountinExcess      
Pension liability                     6,600,000us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent 3,900,000us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent    
Estimated employer Contribution to pension plan                     2,200,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear      
Third Plan | Deferred Compensation Plan                            
Defined Benefit Plan Disclosure [Line Items]                            
Liability for LaBarge Deferred Compensation Plan                     300,000dco_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent
/ us-gaap_AwardTypeAxis
= dco_DeferredCompensationPlanMember
/ dco_PlanByGroupAxis
= dco_PlanThreeMember		 400,000dco_PensionAndOtherPostretirementDefinedBenefitPlansAccruedEmployeesCompensationAndWithholdingsCurrentAndNoncurrent
/ us-gaap_AwardTypeAxis
= dco_DeferredCompensationPlanMember
/ dco_PlanByGroupAxis
= dco_PlanThreeMember		    
Interest on LaBarge Deferred Compensation Plan                     2,000,000dco_PensionObligationsAndOtherLongTermLiabilities
/ us-gaap_AwardTypeAxis
= dco_DeferredCompensationPlanMember
/ dco_PlanByGroupAxis
= dco_PlanThreeMember		 2,000,000dco_PensionObligationsAndOtherLongTermLiabilities
/ us-gaap_AwardTypeAxis
= dco_DeferredCompensationPlanMember
/ dco_PlanByGroupAxis
= dco_PlanThreeMember		    
First plan covers all employees, other than employees of Miltec                            
Defined Benefit Plan Disclosure [Line Items]                            
Contribution by employee towards defined benefit plan                     25.00%dco_DefinedContributionPlanMaximumAnnualMatchingProgramPerEmployeeSalaryPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= dco_DefinedContributionPlansParticipantGroupOneMember		      
Contribution by employer towards defined benefit plan                     50.00%dco_DefinedContributionPlanEmployerMatchingPercentOfEmployeeContribution
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= dco_DefinedContributionPlansParticipantGroupOneMember		      
Employee contribution compensation limit                     6.00%dco_DefinedContributionPlanEmployeeContributionsPercentageOfEligibleCompensation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= dco_DefinedContributionPlansParticipantGroupOneMember		      
Second plan covers only the employees at the Company's Miltec                            
Defined Benefit Plan Disclosure [Line Items]                            
Contribution by employee towards defined benefit plan                     100.00%dco_DefinedContributionPlanMaximumAnnualMatchingProgramPerEmployeeSalaryPercentage
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= dco_DefinedContributionPlansParticipantGroupTwoMember		      
Employee contribution compensation limit                     5.00%dco_DefinedContributionPlanEmployeeContributionsPercentageOfEligibleCompensation
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= dco_DefinedContributionPlansParticipantGroupTwoMember		      
Minimum                            
Defined Benefit Plan Disclosure [Line Items]                            
Percent of annual compensation                     0.00%dco_DefinedContributionPlanEmployerMatchingContributionPercentageofAnnualCompensation
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
Maximum                            
Defined Benefit Plan Disclosure [Line Items]                            
Percent of annual compensation                     7.00%dco_DefinedContributionPlanEmployerMatchingContributionPercentageofAnnualCompensation
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		      
Scenario, Forecast [Member]                            
Defined Benefit Plan Disclosure [Line Items]                            
Estimated net actuarial loss for the defined benefit pension plan                           $ 900,000us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember