Derivative Instruments - Derivative Instruments Measured at Fair Value (Detail) (Forward Foreign Exchange Contracts [Member], Accrued and Other Current Liabilities [Member], Designated As Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Forward Foreign Exchange Contracts [Member] | Accrued and Other Current Liabilities [Member] | Designated As Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Notional Amount	$ 25,990	$ 0
Derivative Fair Value	$ (1,002)	$ 0