Other Real Estate Owned Components of Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Banking and Thrift [Abstract]
Maintenance costs	$ 469	$ 453	$ 436
Loss provisions	1,332	695	69
Losses on other real estate owned	(37)	(447)	(890)
Net operating income (loss)	0	(41)	(85)
Net cost (income) from operations and sale of other real estate owned	$ 1,764	$ 660	$ (470)