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Note 5 - Loans and Allowance for Credit Losses - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | $ 38,332 |  | $ 35,696 | $ 35,843 |  | $ 31,146 |  | $ 31,146
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 1,126 | [1] | 0 | 6,195 | [2] | 460 | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (505) |  | (151) | (3,444) |  | (516) |  | (613)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 189 |  | 745 | 548 |  | 1,343 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 39,142 |  | 36,290 | 39,142 |  | 36,290 |  | 35,843
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 3,857 |  | 3,857
Consumer Borrower [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 7,352 |  | 10,114 | 7,872 |  | 7,674 |  | 7,674
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 784 | [1] | (465) | 183 | [2] | (146) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (161) |  | (17) | (177) |  | (122) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 2 |  | 27 | 99 |  | 108 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 7,977 |  | 9,659 | 7,977 |  | 9,659 |  | 7,872
Consumer Borrower [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 2,145 |  | 2,145
Consumer Borrower [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 6,234 |  | 8,170 | 9,705 |  | 8,690 |  | 8,690
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 660 | [1] | 93 | (159) | [2] | (126) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (246) |  | (134) | (3,140) |  | (394) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 153 |  | 456 | 395 |  | 950 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 6,801 |  | 8,585 | 6,801 |  | 8,585 |  | 9,705
Consumer Borrower [Member] | Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | (535) |  | (535)
Consumer Borrower [Member] | Residential Portfolio Segment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 7,024 |  | 9,803 | 7,671 |  | 7,143 |  | 7,143
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 594 | [1] | (399) | (124) | [2] | 42 | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | (9) | (3) |  | (86) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 3 | 74 |  | 57 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 7,618 |  | 9,398 | 7,618 |  | 9,398 |  | 7,671
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 2,242 |  | 2,242
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 5,366 |  | 7,571 | 6,087 |  | 5,495 |  | 5,495
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 74 | [1] | (317) | (647) | [2] | (43) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | (9) | 0 |  | (9) |  | (9)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 0 | 0 |  | 2 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 5,440 |  | 7,245 | 5,440 |  | 7,245 |  | 6,087
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 1,800 |  | 1,800
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 458 |  | 785 | 485 |  | 345 |  | 345
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | (355) | [1] | (22) | (382) | [2] | (50) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | 0 |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 0 | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 103 |  | 763 | 103 |  | 763 |  | 485
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 468 |  | 468
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 886 |  | 1,117 | 835 |  | 951 |  | 951
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 68 | [1] | (54) | 119 | [2] | 50 | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | 0 |  | 0 |  | (40)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 3 | 0 |  | 6 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 954 |  | 1,066 | 954 |  | 1,066 |  | 835
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 59 |  | 59
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 314 |  | 330 | 264 |  | 352 |  | 352
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 807 | [1] | (6) | 786 | [2] | 85 | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | (3) |  | (77) |  | (77)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 0 | 74 |  | 49 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 1,121 |  | 324 | 1,121 |  | 324 |  | 264
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | (85) |  | (85)
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 328 |  | 311 | 201 |  | 531 |  | 531
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 190 | [1] | (66) | 307 | [2] | (188) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (161) |  | (8) | (174) |  | (36) |  | (51)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 2 |  | 24 | 25 |  | 51 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 359 |  | 261 | 359 |  | 261 |  | 201
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | (97) |  | (97)
Commercial Borrower [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 30,980 |  | 25,582 | 27,971 |  | 23,472 |  | 23,472
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 342 | [1] | 465 | 6,012 | [2] | 606 | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (344) |  | (134) | (3,267) |  | (394) |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 187 |  | 718 | 449 |  | 1,235 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 31,165 |  | 26,631 | 31,165 |  | 26,631 |  | 27,971
Commercial Borrower [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 1,712 |  | 1,712
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs |  |  |  | (3,140) |  |  |  | (436)
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 24,302 |  | 17,171 | 18,086 |  | 14,251 |  | 14,251
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | (313) | [1] | 399 | 5,912 | [2] | 888 | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (98) |  | 0 | (127) |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 14 |  | 262 | 34 |  | 284 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 23,905 |  | 17,832 | 23,905 |  | 17,832 |  | 18,086
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 2,409 |  | 2,409
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 10,820 |  | 3,731 | 6,135 |  | 1,458 |  | 1,458
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | (447) | [1] | 770 | 4,238 | [2] | 492 | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | 0 |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 251 | 0 |  | 251 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 10,373 |  | 4,752 | 10,373 |  | 4,752 |  | 6,135
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 2,551 |  | 2,551
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 2,430 |  | 1,991 | 1,776 |  | 1,062 |  | 1,062
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 161 | [1] | (25) | 815 | [2] | 1,066 | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | 0 |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 0 | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 2,591 |  | 1,966 | 2,591 |  | 1,966 |  | 1,776
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | (162) |  | (162)
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 8,772 |  | 8,555 | 7,726 |  | 7,543 |  | 7,543
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | (260) | [1] | (198) | 786 | [2] | (530) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | 0 |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 0 | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 8,512 |  | 8,357 | 8,512 |  | 8,357 |  | 7,726
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | 1,344 |  | 1,344
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 2,280 |  | 2,894 | 2,449 |  | 4,188 |  | 4,188
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | 233 | [1] | (148) | 73 | [2] | (140) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | (98) |  | 0 | (127) |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 14 |  | 11 | 34 |  | 33 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 2,429 |  | 2,757 | 2,429 |  | 2,757 |  | 2,449
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | (1,324) |  | (1,324)
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 444 |  | 241 | 180 |  | 531 |  | 531
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | (5) | [1] | (27) | 259 | [2] | (156) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 20 |  | 0 | 20 |  | 1 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 459 |  | 214 | 459 |  | 214 |  | 180
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | (162) |  | (162)
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 259 |  | 138 | 96 |  | 281 |  | 281
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | (2) | [1] | (22) | 161 | [2] | (80) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | 0 |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 20 |  | 0 | 20 |  | 1 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | 277 |  | 116 | 277 |  | 116 |  | 96
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | (86) |  | (86)
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance | 185 |  | 103 | 84 |  | 250 |  | 250
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions | (3) | [1] | (5) | 98 | [2] | (76) | [3] |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs | 0 |  | 0 | 0 |  | 0 |  | 0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recoveries | 0 |  | 0 | 0 |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Ending Balance | $ 182 |  | $ 98 | $ 182 |  | 98 |  | 84
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance |  |  |  |  |  | $ (76) |  | $ (76)
[1] | The difference in the credit loss expense reported herein compared to the consolidated statements of income is associated with the credit loss expense of $549 thousand related to off-balance sheet credit exposure and ($14) thousand related to HTM investment securities.
[2] | The difference in the credit loss expense reported herein compared to the consolidated statements of income is associated with the credit loss expense of $31 thousand related to off-balance sheet credit exposure and ($76) thousand related to HTM investment securities.
[3] | The difference in the credit loss expense reported herein compared to the consolidated statements of income is associated with the credit loss expense of $44 thousand related to off-balance sheet credit exposure and $46 thousand related to HTM investment securities.

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