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Loans and Allowance for Credit Losses (Composition of Nonaccrual Loans by Portfolio Class) (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 183,979 | $ 245,833
Total Commercial [Member] | Commercial Real Estate - Income Producing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 7,180 | 2,594
Total Commercial [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 2,498 | 1,217
Residential Mortgages [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 42,237 | 39,262
Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 24,473 | 16,374
Total Commercial And Industrial [Member] | Total Commercial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 107,591 | 186,386
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Non-Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 93,471 | 178,678
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 14,120 | $ 7,708

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