Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2012
Goodwill [Line Items]
Gross goodwill	$ 126,442	$ 126,442
Accumulated goodwill impairment	(26,000)	(26,000)
Goodwill adjustment due to acquisitions	117,676	117,676	(1,905)
Goodwill impairment		(54,273)
Goodwill Ending Balance	163,845	163,845	161,940
Ducommun AeroStructures
Goodwill [Line Items]
Gross goodwill	56,595	56,595
Goodwill adjustment due to acquisitions	648	648
Goodwill Ending Balance	57,243	57,243	57,243
Ducommun LaBarge Technologies
Goodwill [Line Items]
Gross goodwill	69,847	69,847
Accumulated goodwill impairment	(26,000)	(26,000)
Goodwill adjustment due to acquisitions	117,028	117,028	(1,905)
Goodwill impairment	(54,300)	(54,273)
Goodwill Ending Balance	$ 106,602	$ 106,602	$ 104,697

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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