Derivative Instruments - Additional Information (Detail) (USD $)				3 Months Ended
	Mar. 31, 2014 Foreign Exchange Forward	Dec. 31, 2013 Foreign Exchange Forward	Mar. 31, 2013 Foreign Exchange Forward	Mar. 31, 2014 Foreign Exchange Forward Designated As Hedging Instrument	Mar. 31, 2013 Foreign Exchange Forward Designated As Hedging Instrument	Mar. 31, 2014 Foreign Exchange Forward Not Designated As Hedging Instrument	Mar. 31, 2013 Foreign Exchange Forward Not Designated As Hedging Instrument	Mar. 31, 2014 Maximum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum term for foreign currency forward exchange contracts								18 months
Notional amount of foreign currency forward exchange contracts	$ 1,860,000,000	$ 1,550,000,000	$ 1,550,000,000
Net (loss) gain reclassified from accumulated other comprehensive loss to the consolidated statements of operations for derivatives designated as hedging instruments				(2,767,000)	1,129,000
Net gain (loss) recognized in the consolidated statements of operations for derivatives not designated as hedging instruments						$ 9,324,000	$ (13,372,000)