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Note 4 - Loans - Schedule of Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Loans | $ 3,327,099 |  | $ 3,258,121 |  |  |
Net deferred loan costs | 10,681 |  | 10,225 |  |  |
Allowance for credit losses | (39,528) | $ (38,563) | (35,863) | $ (36,186) | $ (33,991) | $ (34,440)
Net loans | 3,298,252 |  | 3,232,483 |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Allowance for credit losses | (22,980) | (21,627) | (19,259) | (19,051) | (17,223) | (18,150)
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member] |  |  |  |  |  |
Loans | 395,449 |  | 391,302 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Nonowner Occupied [Member] |  |  |  |  |  |
Loans | 734,472 |  | 695,699 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |  |  |  |
Loans | 214,215 |  | 206,786 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Other Loans [Member] |  |  |  |  |  |
Loans | 298,662 |  | 295,713 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Allowance for credit losses | (4,626) | (4,973) | (4,628) | (4,615) | (4,628) | (5,087)
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |  |  |  |  |
Loans | 351,213 |  | 349,966 |  |  |
Commercial Portfolio Segment [Member] | Agricultural [Member] |  |  |  |  |  |
Loans | 54,810 |  | 55,606 |  |  |
Residential Portfolio Segment [Member] |  |  |  |  |  |
Allowance for credit losses | (7,208) | (7,210) | (7,271) | (7,549) | (7,422) | (6,916)
Residential Portfolio Segment [Member] | 1-4 Family Residential [Member] |  |  |  |  |  |
Loans | 850,112 |  | 845,081 |  |  |
Residential Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |  |
Loans | 176,609 |  | 158,014 |  |  |
Consumer Portfolio Segment [Member] |  |  |  |  |  |
Allowance for credit losses | (4,714) | $ (4,753) | (4,705) | $ (4,971) | $ (4,718) | $ (4,287)
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |  |  |  |  |
Loans | 8,216 |  | 7,989 |  |  |
Consumer Portfolio Segment [Member] | Indirect Loans [Member] |  |  |  |  |  |
Loans | 224,995 |  | 232,822 |  |  |
Consumer Portfolio Segment [Member] | Direct Loans [Member] |  |  |  |  |  |
Loans | $ 18,346 |  | $ 19,143 |  |  |

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