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Loans (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Receivables [Abstract] |  |  |
Total loans considered impaired | $ 6,035 | $ 3,374 | $ 6,113
Loans considered impaired for which there is a related allowance for loan loss: |  |  |
Outstanding loan balance | 104 |  | 123
Related allowance | 2 | 5 | 2
Average impaired loans | 6,286 | 3,437 | 6,375
Amount of interest earned during period of impairment | $ 107 | $ 82 | $ 403

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