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Summary of Restructuring Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Restructuring And Related Activities [Abstract]
Restructuring accrual balance at Beginning of period		$ 176
Restructuring expense	700	1,162
Cash payments		(664)
Restructuring accrual balance at end of period	$ 674	$ 674

- 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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