Contingencies - Additional Information (Detail) (USD $)	12 Months Ended					12 Months Ended
	Dec. 31, 2012 AirCraft	Dec. 31, 2012 Scenario 1	Dec. 31, 2012 Scenario 2	Dec. 31, 2011 Ducommun AeroStructures El Mirage and Monrovia, California	Dec. 31, 2012 Ducommun AeroStructures Casmalia and West Covina, California	Dec. 31, 2012 For each false claim made on or before September 28, 1999	Dec. 31, 2012 For each false claim made on or after September 28, 1999
Loss Contingencies [Line Items]
Number of Boeing aircraft subject to lawsuit	21
Civil penalty						$ 10,000	$ 11,000
Estimate of Possible Loss		1,600,000,000	851,000,000
Reserve for estimated liability				1,500,000	400,000
Possible Loss, minimum					400,000
Possible Loss, maximum					$ 3,100,000