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Restructuring and Impairment Charges - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]
Impairment charges	$ 617
Restructuring of Fabrication Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,829

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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