Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2014 Segment	Sep. 28, 2013 Inventory Valuation [Member] Ducommun LaBarge Technologies	Jun. 29, 2013 Inventory Valuation [Member] Ducommun LaBarge Technologies	Mar. 30, 2013 Inventory Valuation [Member] Ducommun LaBarge Technologies	Dec. 31, 2012 Inventory Valuation [Member] Ducommun LaBarge Technologies	Jul. 02, 2011 Inventory Valuation [Member] Ducommun LaBarge Technologies	Jul. 09, 2010 Inventory Valuation [Member] Ducommun LaBarge Technologies
Significant Accounting Policies [Line Items]
Number of reportable segments	2
Cash equivalent maturity period	three months or less
Quantifying misstatement in current year financial statements, amount		$ 1.1	$ 0.1	$ 0.1	$ 0.1	$ 0.5	$ 0.3
Increase (decrease) in deferred tax assets	$ (0.5)