Derivatives Designated as Hedging Instruments by Classification and Amount of Gains and Losses (Detail) (Designated As Hedging Instrument, Foreign Exchange Forward, Cost of Sales Classification, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Designated As Hedging Instrument | Foreign Exchange Forward | Cost of Sales Classification
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI	$ (872)	$ 11,968	$ 7,266	$ 10,780
Amount of gain (loss) reclassified from accumulated OCI to statements of operations	$ (326)	$ 4,328	$ 803	$ 8,866