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Presentation of Financial Information (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 01, 2023 | Sep. 30, 2023 | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Accrued interest receivables for loans |  | $ 11,500,000 | $ 11,500,000 | $ 9,800,000 |  |  |
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] |  | Other Assets | Other Assets | Other Assets |  |  |
Retained earnings |  | $ 168,271,000 | $ 168,271,000 | $ 156,545,000 |  |  |
Allowance for loan losses | $ 31,989,000 |  |  | 23,334,000 | $ 22,769,000 | $ 21,938,000 | $ 19,352,000
Allowance for off balance sheet credit |  | 2,300,000 | 2,300,000 | 85,000 |  |  |
Allowance recognized on loans purchased with credit deterioration | 2,898,000 |  |  |  |  |  |
Entities minimum amount of financing receivable to evaluate individually |  | 500,000 | 500,000 |  |  |  |
Provision for credit losses, HTM |  | 0 | 0 |  |  |  |
Other Liabilities [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Allowance for off balance sheet credit |  | $ 2,300,000 | $ 2,300,000 |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Allowance for off balance sheet credit | 3,000,000.0 |  |  |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Retained earnings | 6,600,000 |  |  |  |  |  |
Allowance for loan losses | 5,757,000 |  |  | $ 5,757,000 |  |  |
Aggregate allowance adjustment | 8,700,000 |  |  |  |  |  |
Allowance for off balance sheet credit | 3,000,000.0 |  |  |  |  |  |
Increase in deferred tax assets | 2,300,000 |  |  |  |  |  |
Allowance recognized on loans purchased with credit deterioration | $ 2,900,000 |  |  |  |  |  |

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