Fair Value Measurements - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value Measurements [Line Items]
Assets measured at fair value on a recurring basis	$ 0	$ 0
Liabilities measured at fair value on a recurring basis	0	0
Fair value hierarchy transfers amount	0	0	$ 0
Assets measured at fair value on a non-recurring basis	0	0
Liabilities measured at fair value on a non-recurring basis	0	$ 0
Foreign currency forward contracts
Fair Value Measurements [Line Items]
Foreign currency forward contracts outstanding assets	0
Foreign currency forward contracts outstanding liabilities	$ 0