Effect of Non-Designated Hedges in Condensed Consolidated Statements of Operations (Detail) (Not designated as Hedge Instruments, Foreign exchange contract, Other income (expense), USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Not designated as Hedge Instruments | Foreign exchange contract | Other income (expense)
Derivative Instruments Gain Loss [Line Items]
Amount of Gain Recognized in Income on Derivative	$ (182)	$ 571