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Allowance for Credit Losses - Aging Analysis of Past Due Loans (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | $ 3,043,946 | $ 2,861,728
Past Due 90 Days and Accruing |  | 73
30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 4,176 | 6,935
60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,532 | 2,084
90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 7,507 | 4,139
Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 13,215 | 13,158
Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 3,030,731 | 2,848,570
Commercial and Agriculture [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 304,639 | 304,793
Past Due 90 Days and Accruing |  | 73
Commercial and Agriculture [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,547 | 1,228
Commercial and Agriculture [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 150 | 471
Commercial and Agriculture [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,340 | 1,999
Commercial and Agriculture [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 3,037 | 3,698
Commercial and Agriculture [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 301,602 | 301,095
Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 375,751 | 377,321
Commercial Real Estate Owner Occupied [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans |  | 4
Commercial Real Estate Owner Occupied [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans |  | 123
Commercial Real Estate Owner Occupied [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans |  | 127
Commercial Real Estate Owner Occupied [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 375,751 | 377,194
Commercial Real Estate Non Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,205,453 | 1,161,894
Commercial Real Estate Non Owner Occupied [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 190 |
Commercial Real Estate Non Owner Occupied [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 3,012 |
Commercial Real Estate Non Owner Occupied [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 3,202 |
Commercial Real Estate Non Owner Occupied [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,202,251 | 1,161,894
Residential Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 751,825 | 659,841
Residential Real Estate [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 901 | 4,581
Residential Real Estate [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,081 | 1,180
Residential Real Estate [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,583 | 1,642
Residential Real Estate [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 3,565 | 7,403
Residential Real Estate [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 748,260 | 652,438
Real Estate Construction [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 318,063 | 260,409
Real Estate Construction [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 318,063 | 260,409
Farm Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 24,122 | 24,771
Farm Real Estate [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 24,122 | 24,771
Lease Financing Receivables [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 49,453 | 54,642
Lease Financing Receivables [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,502 | 950
Lease Financing Receivables [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 282 | 410
Lease Financing Receivables [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 1,565 | 373
Lease Financing Receivables [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 3,349 | 1,733
Lease Financing Receivables [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 46,104 | 52,909
Consumer and Other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 14,640 | 18,057
Consumer and Other [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 36 | 172
Consumer and Other [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 19 | 23
Consumer and Other [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 7 | 2
Consumer and Other [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | 62 | 197
Consumer and Other [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Loans | $ 14,578 | $ 17,860

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