Fair Value Measurements - Summary of Foreign Currency Forward Contract (Detail) (Foreign Exchange Contract [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivatives Fair Value [Line Items]
Notional value	$ 30,730	$ 29,431
Fair value of notional	30,553	29,903
Fair value of the asset (liability)	177	(472)
Accounts Receivable [Member]
Derivatives Fair Value [Line Items]
Fair value of the asset (liability)	177
Accounts Payable [Member]
Derivatives Fair Value [Line Items]
Fair value of the asset (liability)		$ (472)

Fair value of the assets less the liabilities of a derivative or group of derivatives.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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