Other Real Estate Owned - Change in OREO (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in the balance for OREO
Balance at the beginning of year, gross	$ 998	$ 815
Transfers between loans and other real estate owned	618	824	$ 1,960
Capitalized expenses	20
Charge-offs	(105)	(63)
Sales proceeds	(1,384)	(706)
Gain on disposition	134	242	354
Deferred gain on disposition		(114)
Balance at the end of year, gross	281	998	815
Less allowance for losses	(86)	(56)	$ (29)	$ (4,135)
Balance at the end of the year, net	$ 195	$ 942