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Allowance for Credit Losses - Aging Analysis of Past Due Loans (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 3,095,994 | $ 3,081,230
Past Due 90 Days and Accruing | 177 | 225
30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 730 | 7,154
60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 2,435 | 10,136
90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 3,786 | 7,298
Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 6,951 | 24,588
Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 3,089,043 | 3,056,642
Commercial and Agriculture [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 302,407 | 328,488
Past Due 90 Days and Accruing | 85 |
Commercial and Agriculture [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 112 | 825
Commercial and Agriculture [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 48 | 114
Commercial and Agriculture [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 429 | 1,374
Commercial and Agriculture [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 589 | 2,313
Commercial and Agriculture [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 301,818 | 326,175
Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 384,176 | 374,367
Past Due 90 Days and Accruing |  | 225
Commercial Real Estate Owner Occupied [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 7 | 225
Commercial Real Estate Owner Occupied [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 7 | 225
Commercial Real Estate Owner Occupied [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 384,169 | 374,142
Commercial Real Estate Non Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,216,031 | 1,225,991
Commercial Real Estate Non Owner Occupied [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans |  | 69
Commercial Real Estate Non Owner Occupied [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 654 | 8,000
Commercial Real Estate Non Owner Occupied [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 484 | 2,514
Commercial Real Estate Non Owner Occupied [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,138 | 10,583
Commercial Real Estate Non Owner Occupied [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,214,893 | 1,215,408
Residential Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 842,362 | 763,869
Residential Real Estate [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 538 | 5,504
Residential Real Estate [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,391 | 1,634
Residential Real Estate [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 2,000 | 2,273
Residential Real Estate [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 3,929 | 9,411
Residential Real Estate [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 838,433 | 754,458
Real Estate Construction [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 278,163 | 305,992
Real Estate Construction [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 278,163 | 305,992
Farm Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 23,713 | 23,035
Farm Real Estate [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 400 |
Farm Real Estate [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 400 |
Farm Real Estate [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 23,313 | 23,035
Lease Financing Receivable [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 38,960 | 46,900
Past Due 90 Days and Accruing | 92 |
Lease Financing Receivable [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans |  | 575
Lease Financing Receivable [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 327 | 351
Lease Financing Receivable [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 449 | 909
Lease Financing Receivable [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 776 | 1,835
Lease Financing Receivable [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 38,184 | 45,065
Consumer and Other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 10,182 | 12,588
Consumer and Other [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 80 | 181
Consumer and Other [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 15 | 37
Consumer and Other [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 17 | 3
Consumer and Other [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 112 | 221
Consumer and Other [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 10,070 | $ 12,367

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