Income Taxes - Components of Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Federal:
Current	$ (758)	$ 1,521	$ 2,289
Deferred	1,021	(682)	(313)
Federal	263	839	1,976
State:
Current	(145)	585	603
Deferred	218	(299)	118
State	73	286	721
Total provision	$ 336	$ 1,125	$ 2,697