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Loans - Loan Balances (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | $ 3,081,230 | $ 2,861,727 |  |
Allowance for credit losses | (39,669) | (37,160) | $ (28,511) | $ (26,641)
Net loans | 3,041,561 | 2,824,568 |  |
Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 3,081,230 | 2,861,727 |  |
Allowance for credit losses | (39,669) | (37,160) |  |
Net loans | 3,041,561 | 2,824,567 |  |
Commercial and Agriculture [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 328,488 | 304,793 |  |
Allowance for credit losses | (6,586) | (7,587) | (3,011) | (2,600)
Commercial and Agriculture [Member] | Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 328,488 | 304,793 |  |
Commercial Real Estate Owner Occupied [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 374,367 | 377,321 |  |
Allowance for credit losses | (4,327) | (4,723) | (4,565) | (4,464)
Commercial Real Estate Owner Occupied [Member] | Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 374,367 | 377,321 |  |
Commercial Real Estate Non Owner Occupied [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 1,225,991 | 1,161,894 |  |
Allowance for credit losses | (11,404) | (12,056) | (14,138) | (13,860)
Commercial Real Estate Non Owner Occupied [Member] | Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 1,225,991 | 1,161,894 |  |
Residential Real Estate [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 763,869 | 659,841 |  |
Allowance for credit losses | (11,866) | (8,489) | (3,145) | (2,597)
Residential Real Estate [Member] | Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 763,869 | 659,841 |  |
Real Estate Construction [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 305,992 | 260,409 |  |
Allowance for credit losses | (3,708) | (3,388) | (2,293) | (1,810)
Real Estate Construction [Member] | Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 305,992 | 260,409 |  |
Farm Real Estate [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 23,035 | 24,771 |  |
Allowance for credit losses | (226) | (260) | (291) | (287)
Farm Real Estate [Member] | Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 23,035 | 24,771 |  |
Lease Financing Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 46,900 | 54,642 |  |
Allowance for credit losses | (1,361) | (297) | (429) |
Lease Financing Receivable [Member] | Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 46,900 | 54,642 |  |
Consumer and Other [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | 12,588 | 18,056 |  |
Allowance for credit losses | (191) | (341) | $ (98) | $ (176)
Consumer and Other [Member] | Loans Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Total loans | $ 12,588 | $ 18,056 |  |

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