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Loans - Additional Information (Detail) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) Loan | Dec. 31, 2020 USD ($) Loan | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 27, 2020 USD ($)
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Total loans |  |  | $ 2,861,727,000 | $ 2,546,666,000 |
Total loans |  |  | 13,158,000 | 9,253,000 |
Net deferred loan fees |  |  | 2,743,000 | 1,652,000 |
Loans processed |  |  | 0 |  |
Loans and Leases Receivable, Net Amount |  |  | 2,824,568,000 | 2,619,770,000 |
Paycheck Protection Program Loans [Member] |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Total loans |  |  | 326,000 |  |
Number of loans processed | Loan | 1,340 | 2,300 |  |  |
Loans processed | $ 131,109,000 | $ 268,300,000 |  |  | $ 284,500,000,000
Loans and Leases Receivable, Net Amount |  |  | 7,231,000 | 8,017,000 |
Commercial and Agriculture [Member] |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Total loans |  |  | 304,793,000 | 278,595,000 |
Total loans |  |  | 3,698,000 | 859,000 |
Commercial and Agriculture [Member] | Paycheck Protection Program Loans [Member] |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Total loans |  |  | $ 326,000 | $ 566,000 |

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