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Loans and Allowance for Loan Losses (Composition of Nonaccrual Loans by Portfolio Class) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 209,831 | $ 187,295
Total Commercial [Member] | Commercial Real Estate - Income Producing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 3,544 | 4,991
Total Commercial [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,608 | 2,146
Residential Mortgages [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 37,300 | 35,866
Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 17,033 | 16,744
Total Commercial And Industrial [Member] | Total Commercial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 150,346 | 127,548
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Non-Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 137,126 | 110,653
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 13,220 | $ 16,895

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