Derivative Instruments - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in the consolidated statements of operations for derivatives not designated as hedging instruments	$ (7,730)	$ (26,340)	$ (49,748)	$ (15,885)
Foreign Exchange Forward
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	972,000	1,110,000	972,000	1,110,000	$ 1,190,000
Foreign Exchange Forward | Designated as hedging instruments | Cost of Sales
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) reclassified from accumulated other comprehensive loss to the consolidated statements of operations for derivatives designated as hedging instruments	19,152	(3,328)	41,708	(8,925)
Foreign Exchange Forward | Not designated as hedging instruments | Cost of Sales
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net gain (loss) recognized in the consolidated statements of operations for derivatives not designated as hedging instruments	896	$ 292	(3)	$ 978
Cross currency swap contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 30,000		$ 30,000
Maximum | Foreign Exchange Forward
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum term for foreign currency forward exchange contracts			18 months