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Summary of Restructuring Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Restructuring And Related Activities [Abstract]
Restructuring accrual balance at Beginning of period	$ 176us-gaap_RestructuringReserveCurrent
Restructuring expense	1,313us-gaap_RestructuringCharges	200us-gaap_RestructuringCharges
Cash payments	(741)us-gaap_PaymentsForRestructuring
Restructuring accrual balance at end of period	$ 748us-gaap_RestructuringReserveCurrent	$ 176us-gaap_RestructuringReserveCurrent

- 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.

+ References+ Details