Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 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	$ (2,056,000)	$ 3,400,000
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	$ 93,399,000	$ 68,732,000