Financial Instruments - Derivative Instruments Which Were Not Designated as Hedging Instruments (Detail) (Fair Value of Derivatives Not Designated as Hedging Instruments [Member], Foreign currency contracts [Member], Other income (expense), net [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value of Derivatives Not Designated as Hedging Instruments [Member] | Foreign currency contracts [Member] | Other income (expense), net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Income on Derivative	$ (4,821)	$ (1,073)	$ 7,686	$ 5,010