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Commitments and Contingencies - Summary of outstanding loan commitments, unused lines of credit and letters of credit (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | $ 25,304 | $ 29,332
Other Mortgage Loans [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | 2,863 | 2,229
Line Of Credit Home Equity [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | 9,224 | 8,672
Line Of Credit Commercial [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | 15,432 | 19,982
Line Of Credit Consumer Unsecured [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | 648 | 678
Letter Of Credit [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Fair value disclosure, off-balance sheet risks, face amount, liability | $ 55 | $ 1,044

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- Definition The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References No definition available. + Details
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