Fair Value Measurements - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 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	$ 2,351,000	$ 3,400,000
Long-term debt, Carrying Value	295,853,000	296,412,000
Long-term debt, Fair Value	$ 329,723,000	323,522,000
Maximum [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Maturities of forward contracts	12 months
Foreign Exchange Contracts [Member]
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Notional amount of the foreign currency derivative instruments	$ 104,131,000	$ 68,732,000