Segment Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Total Assets	$ 785,074	$ 808,087
Total Goodwill and Intangibles	338,296	351,699
Ducommun AeroStructures
Segment Reporting Information [Line Items]
Total Assets	248,326	240,950
Total Goodwill and Intangibles	67,459	70,314
Ducommun LaBarge Technologies
Segment Reporting Information [Line Items]
Total Assets	465,217	495,247
Total Goodwill and Intangibles	270,837	281,385
Corporate Administration
Segment Reporting Information [Line Items]
Total Assets	$ 71,531	$ 71,890