Financial Information by Reportable Segment (Parenthetical) (Detail) (USD $)	12 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 Ducommun LaBarge Technologies	Dec. 31, 2011 Ducommun LaBarge Technologies	Dec. 31, 2012 Corporate Administration	Dec. 31, 2011 Corporate Administration
Segment Reporting Information [Line Items]
Goodwill impairment loss	$ 54,273,000	$ 54,300,000	$ 54,273,000
Business acquisition, transaction costs				$ 700,000	$ 12,400,000