Income Taxes - Summary of Components of Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Domestic	$ 12,652	$ 25,045	$ (4,785)
Foreign	71,232	50,731	42,423
Income before income tax expense	$ 83,884	$ 75,776	$ 37,638