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Securities (Narrative) (Details) | 9 Months Ended | 21 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 USD ($) security | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) security | Dec. 31, 2020 USD ($)
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |  |  |
Securities evaluated for other than temporary impairment | security | 59 |  | 59 |
Securities available-for-sale, at fair value | $ 152,298,000 |  | $ 152,298,000 | $ 90,185,000
Debt Securities, Held-to-maturity, Sale |  |  | $ 0 |
Sales of available for sale securities | $ 0 | $ 13,312,000 |  |
Marketable Securities, Realized Gain (Loss) |  | $ 644,000 |  |
US Agency Obligations [Member] |  |  |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |  |  |
Securities evaluated for other than temporary impairment | security | 22 |  | 22 |
Securities available-for-sale, at fair value | $ 58,029,000 |  | $ 58,029,000 | 41,320,000
Municipals [Member] |  |  |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |  |  |
Securities available-for-sale, at fair value | $ 45,956,000 |  | $ 45,956,000 | $ 24,773,000
S&P Rated AAA [Member] |  |  |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |  |  |
Securities evaluated for other than temporary impairment | security | 23 |  | 23 |
S&P Rated AA [Member] |  |  |  |
Number Of Securities Evaluated For Other Than Temporary Impairment [Line Items] |  |  |  |
Securities evaluated for other than temporary impairment | security | 33 |  | 33 |

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