Income Taxes - Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
U.S. Federal	$ 0	$ 0	$ 0
State	420	37	179
Foreign	5,940	7,082	4,490
Total current expense	6,360	7,119	4,669
Deferred:
U.S. Federal	(13,391)	1,625	3,594
State	(1,869)	(382)	145
U.S. deferred tax valuation allowance		(1,434)	(818)
Foreign	(1,618)	(1,142)	410
Total deferred expense (benefit)	(16,878)	(1,333)	3,331
Total expense (benefit)	$ (10,518)	$ 5,786	$ 8,000