Premises and Equipment (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 3,627	$ 3,245	$ 3,008
Rent expense	$ 1,499	$ 1,397	$ 1,387