Schedule of Components of Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S.	$ 51,145	$ 68,555	$ (5,389)
Foreign	61,901	69,309	16,440
Income before income taxes	$ 113,046	$ 137,864	$ 11,051