Derivatives Not Designated as Hedging Instruments by Classification and Amount of Gains and Losses (Detail) (Not Designated As Hedging Instrument, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments	$ (3,918)	$ (29,337)	$ (17,290)	$ (8,642)
Foreign Exchange Forward | Non-Operating Income Expense Classification
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments	(3,546)	(28,555)	(17,321)	(8,107)
Foreign Exchange Forward | Cost of Sales Classification
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments	$ (372)	$ (782)	$ 31	$ (535)