Fair Value (Level 3 assets and liabilities measured at fair value) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Impaired loans	$ 14,586	$ 14,086
Foreclosed real estate	$ 8,296	$ 12,571	$ 11,196
Impaired Loans [Member]
Valuation technique	Appraised value; PV of expected cash flows	Appraised value; PV of expected cash flows
Significant unobservable inputs	Discounts to reflect current market conditions, ultimate collectability, and estimated costs to sell	Discounts to reflect current market conditions, ultimate collectability, and estimated costs to sell
General range of significant input values, minimum	0.00%	0.00%
General range of significant input values, maximum	10.00%	10.00%
Foreclosed Real Estate [Member]
Valuation technique	Appraised value; List or contract price	Appraised value; List or contract price
Significant unobservable inputs	Discounts to reflect current market conditions, abbreviated holding period and estimated costs to sell	Discounts to reflect current market conditions and estimated costs to sell
General range of significant input values, minimum	0.00%	0.00%
General range of significant input values, maximum	10.00%	10.00%