Other Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Real Estate Owned
Balance, beginning of year	$ 1,161	$ 1,037	$ 1,186
Additions / foreclosures	197	450	645
Sales	(577)	(233)	(777)
Gain (loss) on sale	18	(52)	(17)
Write downs	(339)	(41)	0
Balance, end of year	460	1,161	$ 1,037
Consumer mortgage loans collaterlized by residential real estate, foreclosure proceedings in process	$ 41	$ 46