Business Segment Information - Segment Assets (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
Segment Reporting Information [Line Items]
Total Assets	$ 747,599	$ 754,307	$ 757,297	$ 751,293	$ 762,645	$ 758,742	$ 769,528	$ 762,546
Goodwill and Intangibles	312,673				323,034
Ducommun AeroStructures
Segment Reporting Information [Line Items]
Total Assets	245,925				241,502
Goodwill and Intangibles	63,497				65,213
Ducommun LaBarge Technologies
Segment Reporting Information [Line Items]
Total Assets	427,719				439,853
Goodwill and Intangibles	249,176				257,821
Corporate Administration
Segment Reporting Information [Line Items]
Total Assets	$ 73,955				$ 81,290