Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Effective portion of change in fair value of foreign currency forward contracts	$ 1,029	$ 3,400
Long-term debt	297,094	296,412
Foreign Exchange Contracts
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Notional amount of the foreign currency derivative instruments	$ 89,414	68,732
Foreign Exchange Contracts | Maximum
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Maturities of forward contracts	12 months
Quoted Prices in Active Markets for Identical Assets Level (1)
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Fair value of long term debt	$ 331,941	$ 323,522