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Loans - Loans (Detail) - USD ($) $ in Thousands | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Loans: |  |  |  |  |  |
Loans - Gross | $ 2,560,760 |  | $ 2,580,674 |  |  |
Less: Net deferred loan fees and costs | (1,022) |  | 517 |  |  |
Loans after net deferred loan fees and costs | 2,559,738 |  | 2,581,191 |  |  |
Less: Allowance for credit losses | (25,270) | $ (24,680) | (25,024) | $ (24,910) | $ (24,634) | $ (20,313)
Loans - Net | 2,534,468 |  | 2,556,167 |  |  |
Consumer Real Estate [Member] |  |  |  |  |  |
Loans: |  |  |  |  |  |
Loans - Gross | 525,902 |  | 521,895 |  |  |
Less: Allowance for credit losses | (3,201) | (3,285) | (3,581) | (3,998) | (3,623) | (998)
Agricultural Real Estate [Member] |  |  |  |  |  |
Loans: |  |  |  |  |  |
Loans - Gross | 222,558 |  | 223,791 |  |  |
Less: Allowance for credit losses | (926) | (1,171) | (312) | (237) | (209) | (349)
Agricultural [Member] |  |  |  |  |  |
Loans: |  |  |  |  |  |
Loans - Gross | 142,909 |  | 132,560 |  |  |
Less: Allowance for credit losses | (285) | (377) | (336) | (107) | (66) | (751)
Commercial Real Estate [Member] |  |  |  |  |  |
Loans: |  |  |  |  |  |
Loans - Gross | 1,303,598 |  | 1,337,766 |  |  |
Less: Allowance for credit losses | (16,319) | (15,953) | (17,400) | (16,681) | (16,088) | (11,924)
Commercial and Industrial [Member] |  |  |  |  |  |
Loans: |  |  |  |  |  |
Loans - Gross | 268,426 |  | 254,935 |  |  |
Consumer [Member] |  |  |  |  |  |
Loans: |  |  |  |  |  |
Loans - Gross | 70,918 |  | 79,591 |  |  |
Less: Allowance for credit losses | (1,172) | $ (1,162) | (1,302) | $ (1,120) | $ (1,234) | $ (909)
Other Loan [Member] |  |  |  |  |  |
Loans: |  |  |  |  |  |
Loans - Gross | $ 26,449 |  | $ 30,136 |  |  |

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