Other Real Estate Owned - Changes in the Allowance for OREO Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Change in the allowance for OREO losses
Balance at the beginning of year	$ 56	$ 29	$ 4,135
Provision for losses	135	90	29
Charge-offs, net	(105)	(63)	(4,135)
Balance at the end of year	86	56	29
OREO, expenses other than provision for losses	$ (22)	$ 19	$ (6)