Derivative Instruments - Not Designated as Hedging Instruments by Classification and Amount of Gains and Losses (Detail) - Not designated as hedging instruments - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments	$ 25,955	$ 24,717
Foreign Exchange Forward | Other non-operating income (expense), net
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments	25,569	23,592
Foreign Exchange Forward | Cost of Sales
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in the statements of operations for derivatives not designated as hedging instruments	$ 386	$ 1,125