Other Real Estate Owned ("OREO") (Foreclosed Real Estate Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Real Estate Owned ("OREO") [Abstract]
Valuation allowance	$ 600	$ 574	$ 664
Operating expenses	146	287	395
Expenses applicable to OREO assets	$ 746	$ 861	$ 1,059