Derivatives and Hedging Activities - Additional Information (Detail) - Derivatives designated as cash flow hedging instruments - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income, net	$ 25,000	$ (73,000)
Foreign exchange forward and option contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal amount of Hedging Contracts	$ 5,650,000		$ 3,200,000