Fair Value (Valuation Methodology and Unobservable Inputs for Level Three Assets Measured at Fair Value on Non Recurring Basis) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		$ 130	$ 922
Company Determined Fair Value (Level 3) [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost			10.00%
Company Determined Fair Value (Level 3) [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost			10.00%
Company Determined Fair Value (Level 3) [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost			10.00%
Company Determined Fair Value (Level 3) [Member] | Impaired Loans Partially Charged Off [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		$ 86	$ 166
Company Determined Fair Value (Level 3) [Member] | Impaired Loans Partially Charged Off [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		0.00%	0.00%
Fair Value Inputs, Discount Rate		0.00%	0.00%
Company Determined Fair Value (Level 3) [Member] | Impaired Loans Partially Charged Off [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		10.00%	10.00%
Fair Value Inputs, Discount Rate		50.00%	0.00%
Company Determined Fair Value (Level 3) [Member] | Impaired Loans Partially Charged Off [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		6.00%	5.00%
Fair Value Inputs, Discount Rate		18.00%	0.00%
Company Determined Fair Value (Level 3) [Member] | Impaired Loans Specifically Reserved [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	[1]	$ 3,610	$ 334
Company Determined Fair Value (Level 3) [Member] | Impaired Loans Specifically Reserved [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		10.00%	10.00%
Fair Value Inputs, Discount Rate	[1]	0.00%	0.00%
Company Determined Fair Value (Level 3) [Member] | Impaired Loans Specifically Reserved [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		10.00%	10.00%
Fair Value Inputs, Discount Rate	[1]	0.00%	50.00%
Company Determined Fair Value (Level 3) [Member] | Impaired Loans Specifically Reserved [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		10.00%	10.00%
Fair Value Inputs, Discount Rate	[1]	0.00%	13.00%
Company Determined Fair Value (Level 3) [Member] | Other real estate owned [Member] | Market Approach Valuation Technique [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		$ 130	$ 922
Company Determined Fair Value (Level 3) [Member] | Other real estate owned [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		10.00%
Fair Value Inputs, Discount Rate		20.00%	0.00%
Company Determined Fair Value (Level 3) [Member] | Other real estate owned [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		10.00%
Fair Value Inputs, Discount Rate		20.00%	73.00%
Company Determined Fair Value (Level 3) [Member] | Other real estate owned [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Estimated selling cost		10.00%
Fair Value Inputs, Discount Rate		20.00%	7.00%
Company Determined Fair Value (Level 3) [Member] | Other real estate owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value		$ 130	$ 922

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