Change in Fair Value of Forward Contracts Recorded in Other Income (Expense), Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments and Hedging Activities Disclosures [Line Items]
(Loss) gain included in other income (expense), net	$ (95)	$ (532)	$ 743