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Restructuring and Severance - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Restructuring Cost And Reserve [Line Items]
Restructuring and severance	$ 1,770,000	$ 325,000
Restructuring and severance outstanding	1,100,000
Payments related to restructuring and severance	$ 700,000

- 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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