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Fair Value Measurements (Fair Value of Assets Measured on Nonrecurring Basis) (Details) - Fair Value, Inputs, Level 3 [Member] - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Appraisal Of Collateral [Member] |  |
Impaired loans: |  |
Impaired loans | $ 1,877 | $ 2,489
Other real estate owned | $ 38 | $ 74
Appraisal Of Collateral [Member] | Maximum [Member] |  |
Impaired loans: |  |
Other real estate owned, Appraisal adjustment, Range | 19.00% | 31.00%
Appraisal Of Collateral [Member] | Minimum [Member] |  |
Impaired loans: |  |
Impaired loans, Appraisal adjustment, Range | 10.00% |
Other real estate owned, Appraisal adjustment, Range | 0.00% | 0.00%
Other real estate owned, Liquidation expense, Range |  | 10.00%
Appraisal Of Collateral [Member] | Weighted Average [Member] |  |
Impaired loans: |  |
Impaired loans, Appraisal adjustment, Range | 10.00% |
Other real estate owned, Appraisal adjustment, Range | 19.00% |
Discounted Cash Flow Analysis [Member] |  |
Impaired loans: |  |
Impaired loans | $ 2,549 | $ 2,599
Discounted Cash Flow Analysis [Member] | Maximum [Member] |  |
Impaired loans: |  |
Impaired loans, Discount rate, Range | 7.25% | 7.25%
Discounted Cash Flow Analysis [Member] | Minimum [Member] |  |
Impaired loans: |  |
Impaired loans, Discount rate, Range | 4.00% | 4.00%
Discounted Cash Flow Analysis [Member] | Weighted Average [Member] |  |
Impaired loans: |  |
Impaired loans, Discount rate, Range | 6.00% |

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