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Loans - Summary of Activities in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year | $ 24,680 | $ 24,634 | $ 25,024 | $ 20,313 | $ 20,313
Provision for credit losses - loans | 605 | 143 | 316 | 960 | 1,698
Charge Offs | (85) | (60) | (277) | (182) | (990)
Recoveries | 70 | 193 | 207 | 255 | 439
Balance at ending of year | 25,270 | 24,910 | 25,270 | 24,910 | 25,024
Consumer Real Estate [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year | 3,285 | 3,623 | 3,581 | 998 | 998
Provision for credit losses - loans | (82) | 369 | (372) | 113 | (326)
Charge Offs | (3) |  | (13) |  |
Recoveries | 1 | 6 | 5 | 13 | 35
Balance at ending of year | 3,201 | 3,998 | 3,201 | 3,998 | 3,581
Agricultural Real Estate [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year | 1,171 | 209 | 312 | 349 | 349
Provision for credit losses - loans | (245) | (76) | 614 | (50) | 24
Recoveries |  | 104 |  | 104 | 105
Balance at ending of year | 926 | 237 | 926 | 237 | 312
Agricultural [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year | 377 | 66 | 336 | 751 | 751
Provision for credit losses - loans | (92) | 41 | (51) | 6 | 225
Recoveries |  |  |  |  | 10
Balance at ending of year | 285 | 107 | 285 | 107 | 336
Commercial Real Estate [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year | 15,953 | 16,088 | 17,400 | 11,924 | 11,924
Provision for credit losses - loans | 365 | 590 | (1,085) | 1,251 | 1,967
Recoveries | 1 | 3 | 4 | 5 | 8
Balance at ending of year | 16,319 | 16,681 | 16,319 | 16,681 | 17,400
Commercial and Industrial [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year | 2,732 | 3,414 | 2,093 | 5,382 | 5,382
Provision for credit losses - loans | 596 | (653) | 1,270 | (462) | (643)
Charge Offs |  |  | (101) |  | (565)
Recoveries | 39 | 6 | 105 | 12 | 84
Balance at ending of year | 3,367 | 2,767 | 3,367 | 2,767 | 2,093
Consumer [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year | 1,162 | 1,234 | 1,302 | 909 | 909
Provision for credit losses - loans | 63 | (128) | (60) | 102 | 451
Charge Offs | (82) | (60) | (163) | (182) | (425)
Recoveries | 29 | 74 | 93 | 121 | 197
Balance at ending of year | $ 1,172 | $ 1,120 | $ 1,172 | 1,120 | 1,302
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year |  |  |  | $ 3,564 | $ 3,564
Accounting Standards Update [Extensible Enumeration] |  |  |  | Accounting Standards Update 2016-13 [Member] | Accounting Standards Update 2016-13 [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer Real Estate [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year |  |  |  | $ 2,874 | $ 2,874
Cumulative Effect, Period of Adoption, Adjustment [Member] | Agricultural Real Estate [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year |  |  |  | (166) | (166)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Agricultural [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year |  |  |  | (650) | (650)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial Real Estate [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year |  |  |  | 3,501 | 3,501
Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial and Industrial [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year |  |  |  | (2,165) | (2,165)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer [Member] |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |
Balance at beginning of year |  |  |  | $ 170 | $ 170

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