Net (Gains) Losses Reclassified from Accumulated Other Comprehensive Income (Loss) (Detail) (Derivatives designated as cash flow hedging instruments, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	$ (110)	$ 28
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	73	(1)
Foreign exchange option contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	(76)	11
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	51
Foreign exchange forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (loss), Effective portion, Net, Total	(34)	17
Gain (loss) reclassified from accumulated OCI into income, Effective portion, Net, Total	$ 22	$ (1)