Income Taxes - Income (Loss) Before Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income (loss) before provision (benefit) for income taxes:
United States	$ (32,498)	$ (42,450)	$ (9,341)
Foreign	25,189	19,500	22,513
Income (loss) before provision (benefit) for income taxes and share of net income from joint venture	$ (7,309)	$ (22,950)	$ 13,172