Derivative Instruments - Derivative Instruments Measured at Fair Value and Classification on Condensed Consolidated Balance Sheets (Detail) - Forward Foreign Exchange Contracts [Member] - Designated As Hedging Instrument [Member] - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Notional Amount	$ 9,037,000
Derivative Fair Value	$ 160,000
Accrued and Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Notional Amount		$ 47,231,000
Derivative Fair Value		$ (595,000)