Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Federal:
Current	$ (21)	$ 81	$ 51	$ 91
Deferred	209	(2)	402	(2)
Gross Federal	188	79	453	89
State:
Current	185	174	234	199
Deferred	2	1	6	2
Gross State	187	175	240	201
Income tax expense	$ 375	$ 254	$ 693	$ 290