Business Segment Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2012 Segment	Dec. 31, 2011	Dec. 31, 2011 Ducommun LaBarge Technologies	Dec. 31, 2011 Ducommun LaBarge Technologies
Segment Reporting Information [Line Items]
Number of reportable segments	2
Goodwill impairment loss		$ 54,273	$ 54,300	$ 54,273