Income Taxes - Components of (Benefit) Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal		$ 948	$ 61	$ (565)
State		399	(1,294)	810
Foreign		41	69	18
Total current provision (benefit)		1,388	(1,164)	263
Deferred:
Federal		(4,624)	(5,267)	(2,584)
State		0	2,488	(1,635)
Foreign		18	34	0
Total deferred benefit		(4,606)	(2,745)	(4,219)
Benefit for income taxes	$ (3,956)	$ (3,218)	$ (3,909)	$ (3,956)