Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Supplemental Quarterly Financial Data (Unaudited) - Additional Information (Detail) (USD $)	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jun. 28, 2014	Jun. 29, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Asset impairments													$ 0	$ 6,975,000	$ 0
Forward loss provision					5,200,000us-gaap_LossOnContracts
Income Tax Benefit	(1,122,000)us-gaap_IncomeTaxExpenseBenefit	1,754,000us-gaap_IncomeTaxExpenseBenefit	3,197,000us-gaap_IncomeTaxExpenseBenefit	2,544,000us-gaap_IncomeTaxExpenseBenefit	(2,115,000)us-gaap_IncomeTaxExpenseBenefit	(1,000,000)us-gaap_IncomeTaxExpenseBenefit	2,193,000us-gaap_IncomeTaxExpenseBenefit	(1,071,000)us-gaap_IncomeTaxExpenseBenefit	5,741,000us-gaap_IncomeTaxExpenseBenefit	1,122,000us-gaap_IncomeTaxExpenseBenefit	7,495,000us-gaap_IncomeTaxExpenseBenefit	122,000us-gaap_IncomeTaxExpenseBenefit	6,373,000us-gaap_IncomeTaxExpenseBenefit	(1,993,000)us-gaap_IncomeTaxExpenseBenefit	6,501,000us-gaap_IncomeTaxExpenseBenefit
Tax credits for the year													2,400,000	4,500,000
Ducommun AeroStructures
Segment Reporting Information [Line Items]
Asset impairments					7,000,000
Forward loss provision					5,200,000
Embraer Legacy 400/500 \| Ducommun AeroStructures
Segment Reporting Information [Line Items]
Asset impairments					5,700,000
Forward loss provision					3,900,000
Inventory write-down	1,900,000				1,900,000
Boeing 777 \| Ducommun AeroStructures
Segment Reporting Information [Line Items]
Asset impairments					1,300,000
Forward loss provision					$ 1,300,000