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Pending Branch Sale (Narrative) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 29, 2020 | Nov. 30, 2020 | Dec. 31, 2003
--- | --- | --- | --- | --- | ---
Pending Branch Sale [Line Items] |  |  |  |  |
Deposits | $ 1,320,380 | $ 1,113,070 |  |  |
Subordinated debt | $ 14,854 | $ 14,844 |  |  | $ 5,155
Branch Purchase And Assumption Agreement [Member] |  |  |  |  |
Pending Branch Sale [Line Items] |  |  |  |  |
Deposits |  |  | $ 100,000 |  |
Subordinated debt |  |  | $ 15,000 | $ 3,100 |
Percent of deposit premium to the average daily deposits |  |  | 1.75% |  |
Branch Purchase And Assumption Agreement [Member] | Single Family Residential Mortgage And Home Equity Line [Member] | Maximum [Member] |  |  |  |  |
Pending Branch Sale [Line Items] |  |  |  |  |
Subordinated debt |  |  | $ 13,500 |  |

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