Other Income - Schedule of Other Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Income and Expenses [Abstract]
Foreign currency (gains) losses	$ (414)	$ 349	$ (554)	$ 330
Tax indemnification income	(489)	(196)	(1,469)	(632)
Other income	(5)	(5)	(14)	(15)
Total other (income) expense	$ (908)	$ 148	$ (2,037)	$ (317)