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	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Designated As Hedging Instrument | Foreign Exchange Forward
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	$ (13,103)	$ 2,734
Amount of gain (loss) reclassified from accumulated OCI to statements of operations	$ (4,897)	$ 29,933