Goodwill and Other Intangible Assets - Future Amortization Expense of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2015	$ 10,032
2016	9,427
2017	9,213
2018	9,042
2019	8,896
Thereafter	75,557
Finite Lived Intangible Assets, Amortization Expense, Net, Total	122,167
Ducommun AeroStructures
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2015	1,386
2016	1,123
2017	907
2018	737
2019	591
Thereafter	1,510
Finite Lived Intangible Assets, Amortization Expense, Net, Total	6,254
Ducommun LaBarge Technologies
Finite Lived Intangible Assets Future Amortization Expense [Line Items]
2015	8,646
2016	8,304
2017	8,306
2018	8,305
2019	8,305
Thereafter	74,047
Finite Lived Intangible Assets, Amortization Expense, Net, Total	$ 115,913