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Off-Balance-Sheet Financial Instruments and Concentrations of Credit Risk (Details) | Dec. 31, 2021 USD ($) derivative | Dec. 31, 2020 USD ($)
--- | --- | ---
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Off-balance-sheet financial instruments | $ 363,904,000 | $ 231,756,000
Designated as Hedging Instrument | Customer loan interest swap agreements | Cash Flow Hedging |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Number of derivative instruments (derivative) | derivative | 6 |
Notional principal amounts | $ 80,738,000 |
Unused lines, collateralized by residential real estate |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Off-balance-sheet financial instruments | 94,650,000 | 89,852,000
Other unused commitments |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Off-balance-sheet financial instruments | 121,331,000 | 102,963,000
Standby letters of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Off-balance-sheet financial instruments | 4,425,000 | 4,415,000
Commitments to extend credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Off-balance-sheet financial instruments | $ 143,498,000 | $ 34,526,000

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