Derivative Instruments and Hedging Activities - Schedule of Fair Values of Hedging Instruments Recorded in Consolidated Balance Sheet (Detail) - Significant Other Observable Inputs (Level 2) [Member] - Foreign Exchange Contracts [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives Not Designated as Hedging Instruments (Level 2):
Total derivatives, liabilities fair value	$ (402)
Total derivatives, assets fair value		$ 159
Other Receivables [Member]
Derivatives Not Designated as Hedging Instruments (Level 2):
Derivatives asset, fair value		$ 159
Accounts Payable [Member]
Derivatives Not Designated as Hedging Instruments (Level 2):
Derivatives liabilities, fair value	$ (402)