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Fair Value of Financial Instruments (Narrative) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Accrued interest excluded from carrying value | $ 168 |
Allowance for mortgage loan losses | 76 | $ 76
Rabbi Trust | Other Assets | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash surrender value | $ 9,188 |

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