Fair Value Measurements (Unobservable Inputs Used in Level 3 Fair Value Measurements) (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loans With Impairment [Member]
Assets, Fair Value Disclosure	$ 3,202	$ 7,635
Other Real Estate Owned [Member]
Assets, Fair Value Disclosure	$ 9,341	$ 7,763
Maximum [Member] | Loans With Impairment [Member]
Fair Value Inputs, Discount Rate	50.00%	50.00%
Maximum [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Discount Rate	50.00%	50.00%
Minimum [Member] | Loans With Impairment [Member]
Fair Value Inputs, Discount Rate	0.00%	0.00%
Minimum [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Discount Rate	0.00%	0.00%
Weighted Average [Member] | Loans With Impairment [Member]
Fair Value Inputs, Discount Rate	24.00%	14.00%
Weighted Average [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Discount Rate	12.00%	12.00%