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Allowance for Credit Losses - Aging Analysis of Past Due Loans (Detail) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 3,151,124 | $ 3,081,230
Past Due 90 Days and Accruing | 223 | 225
30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 2,095 | 7,154
60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,262 | 10,136
90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 4,676 | 7,298
Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 8,033 | 24,588
Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 3,143,091 | 3,056,642
Commercial and Agriculture [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 338,598 | 328,488
Past Due 90 Days and Accruing | 98 |
Commercial and Agriculture [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 114 | 825
Commercial and Agriculture [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 0 | 114
Commercial and Agriculture [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,639 | 1,374
Commercial and Agriculture [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,753 | 2,313
Commercial and Agriculture [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 336,845 | 326,175
Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 378,248 | 374,367
Past Due 90 Days and Accruing |  | 225
Commercial Real Estate Owner Occupied [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,231 |
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 | 1,238 | 225
Commercial Real Estate Owner Occupied [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 377,010 | 374,142
Commercial Real Estate Non Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,263,612 | 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 | 0 | 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 | 484 | 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 | 1,263,128 | 1,215,408
Residential Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 815,408 | 763,869
Residential Real Estate [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 426 | 5,504
Residential Real Estate [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,262 | 1,634
Residential Real Estate [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,602 | 2,273
Residential Real Estate [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 3,290 | 9,411
Residential Real Estate [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 812,118 | 754,458
Real Estate Construction [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 277,643 | 305,992
Real Estate Construction [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 277,643 | 305,992
Farm Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 23,866 | 23,035
Farm Real Estate [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 23,866 | 23,035
Lease Financing Receivable [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 42,758 | 46,900
Past Due 90 Days and Accruing | 125 |
Lease Financing Receivable [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 255 | 575
Lease Financing Receivable [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 0 | 351
Lease Financing Receivable [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 924 | 909
Lease Financing Receivable [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 1,179 | 1,835
Lease Financing Receivable [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 41,579 | 45,065
Consumer and Other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 10,991 | 12,588
Consumer and Other [Member] | 30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 69 | 181
Consumer and Other [Member] | 60-89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 0 | 37
Consumer and Other [Member] | 90 Days or Greater Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 20 | 3
Consumer and Other [Member] | Financial Asset, Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | 89 | 221
Consumer and Other [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans | $ 10,902 | $ 12,367

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