Income Taxes - Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ (1,155)	$ 158	$ 1,114
State	14	(34)	334
Foreign	120	1,108	836
Total current	(1,021)	1,232	2,284
Deferred:
Federal	4,143	(7,260)	642
State	548	(959)	(78)
Foreign	87	(1,091)	(84)
Total deferred	4,778	(9,310)	480
Income tax (benefit) expense	$ 3,757	$ (8,078)	$ 2,764