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Allowance for Loan Losses - Changes in the Allowance for Credit Losses (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | $ 28,511 |  |  |
Charge-offs | (1,431) |  |  |
Recoveries | 452 |  |  |
Provision (Credit) | 4,435 |  |  |
Ending Balance | 37,160 | $ 28,511 |  |
Beginning balance | 28,511 | 26,641 | $ 25,028 |
Charge-offs |  | (222) | (159) |
Recoveries |  | 340 | 942 |
Provision (Credit) | 4,435 | 1,752 | 830 | $ 10,112
Ending Balance |  | 28,511 | 26,641 | 25,028
ASU 2016-13 [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 897 |  |  |
Ending Balance |  | 897 |  |
ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 4,296 |  |  |
Ending Balance |  | 4,296 |  |
Commercial and Agriculture [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 3,011 |  |  |
Charge-offs | (1,300) |  |  |
Recoveries | 177 |  |  |
Provision (Credit) | 5,270 |  |  |
Ending Balance | 7,587 | 3,011 |  |
Beginning balance | 3,011 | 2,600 | 2,810 |
Charge-offs |  | (22) | (15) |
Recoveries |  | 24 | 165 |
Provision (Credit) |  | 409 | (360) |
Ending Balance |  | 3,011 | 2,600 | 2,810
Commercial and Agriculture [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 429 |  |  |
Ending Balance |  | 429 |  |
Commercial Real Estate Owner Occupied [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 4,565 |  |  |
Recoveries | 15 |  |  |
Provision (Credit) | (951) |  |  |
Ending Balance | 4,723 | 4,565 |  |
Beginning balance | 4,565 | 4,464 | 4,057 |
Recoveries |  | 42 | 7 |
Provision (Credit) |  | 59 | 400 |
Ending Balance |  | 4,565 | 4,464 | 4,057
Commercial Real Estate Owner Occupied [Member] | ASU 2016-13 [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 19 |  |  |
Ending Balance |  | 19 |  |
Commercial Real Estate Owner Occupied [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 1,075 |  |  |
Ending Balance |  | 1,075 |  |
Commercial Real Estate Non Owner Occupied [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 14,138 |  |  |
Recoveries | 46 |  |  |
Provision (Credit) | 719 |  |  |
Ending Balance | 12,056 | 14,138 |  |
Beginning balance | 14,138 | 13,860 | 12,451 |
Recoveries |  | 74 | 395 |
Provision (Credit) |  | 204 | 1,014 |
Ending Balance |  | 14,138 | 13,860 | 12,451
Commercial Real Estate Non Owner Occupied [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | (2,847) |  |  |
Ending Balance |  | (2,847) |  |
Residential Real Estate [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 3,145 |  |  |
Charge-offs | (17) |  |  |
Recoveries | 134 |  |  |
Provision (Credit) | 2,299 |  |  |
Ending Balance | 8,489 | 3,145 |  |
Beginning balance | 3,145 | 2,597 | 2,484 |
Charge-offs |  | (97) | (120) |
Recoveries |  | 163 | 302 |
Provision (Credit) |  | 482 | 69 |
Ending Balance |  | 3,145 | 2,597 | 2,484
Residential Real Estate [Member] | ASU 2016-13 [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 166 |  |  |
Ending Balance |  | 166 |  |
Residential Real Estate [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 2,762 |  |  |
Ending Balance |  | 2,762 |  |
Real Estate Construction [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 2,293 |  |  |
Recoveries | 37 |  |  |
Provision (Credit) | (444) |  |  |
Ending Balance | 3,388 | 2,293 |  |
Beginning balance | 2,293 | 1,810 | 2,439 |
Recoveries |  | 4 | 1 |
Provision (Credit) |  | 479 | 630 |
Ending Balance |  | 2,293 | 1,810 | 2,439
Real Estate Construction [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 1,502 |  |  |
Ending Balance |  | 1,502 |  |
Farm Real Estate [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 291 |  |  |
Provision (Credit) | (3) |  |  |
Ending Balance | 260 | 291 |  |
Beginning balance | 291 | 287 | 338 |
Recoveries |  | 6 | 12 |
Provision (Credit) |  | (2) | (63) |
Ending Balance |  | 291 | 287 | 338
Farm Real Estate [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | (28) |  |  |
Ending Balance |  | (28) |  |
Lease Financing Receivable [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 429 |  |  |
Provision (Credit) | (2,510) |  |  |
Ending Balance | 297 | 429 |  |
Beginning balance | 429 | 0 |  |
Charge-offs |  | (23) |  |
Provision (Credit) |  | 452 |  |
Ending Balance |  | 429 | 0 |
Lease Financing Receivable [Member] | ASU 2016-13 [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 635 |  |  |
Ending Balance |  | 635 |  |
Lease Financing Receivable [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 1,743 |  |  |
Ending Balance |  | 1,743 |  |
Consumer and Other [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 98 |  |  |
Charge-offs | (114) |  |  |
Recoveries | 43 |  |  |
Provision (Credit) | 36 |  |  |
Ending Balance | 341 | 98 |  |
Beginning balance | 98 | 176 | 209 |
Charge-offs |  | (80) | (24) |
Recoveries |  | 27 | 60 |
Provision (Credit) |  | (25) | (69) |
Ending Balance |  | 98 | 176 | 209
Consumer and Other [Member] | ASU 2016-13 [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 77 |  |  |
Ending Balance |  | 77 |  |
Consumer and Other [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 201 |  |  |
Ending Balance |  | 201 |  |
Unallocated [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | 541 |  |  |
Provision (Credit) | 19 |  |  |
Ending Balance | 19 | 541 |  |
Beginning balance | 541 | 847 | 240 |
Provision (Credit) |  | (306) | 607 |
Ending Balance |  | 541 | $ 847 | $ 240
Unallocated [Member] | ASU 2016-13 [Member] | CECL Loans [Member] |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |
Beginning Balance | $ (541) |  |  |
Ending Balance |  | $ (541) |  |

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