Derivatives Designated as Hedging Instruments by Classification and Amount of Gains and Losses (Detail) (Designated As Hedging Instrument, Foreign Exchange Forward, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Designated As Hedging Instrument | Foreign Exchange Forward
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	$ 1,228	$ 8,138
Amount of gain (loss) reclassified from accumulated OCI to statements of operations	$ (2,767)	$ 1,129