Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Federal:
Current	$ (30)	$ 80	$ 21	$ 170
Deferred	(1,467)		(1,065)	(1)
Gross Federal	(1,497)	80	(1,044)	169
State:
Current	43	176	277	376
Deferred	(52)	1	(46)	2
Gross State	(9)	177	231	378
Income tax expense	$ (1,506)	$ 257	$ (813)	$ 547