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Note 4 - Loans and Allowance for Credit Losses - Schedule of Total Loans Outstanding by Portfolio Segment (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | $ 4,102,075 | $ 3,992,534
Commercial Borrower [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 2,856,720 | 2,787,277
Consumer Borrower [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss |  | 1,205,257
Commercial Portfolio Segment [Member] | Commercial Borrower [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 702,135 | 666,727
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 2,025,634 | 1,996,243
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Construction, Land, and Development [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 349,768 | 294,677
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Multifamily Loan [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 374,761 | 363,123
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Non-Owner Occupied [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 865,785 | 967,025
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Owner Occupied Loans [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 435,320 | 371,418
Agricultural Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 128,951 | 124,307
Agricultural Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Land [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 65,900 | 61,299
Agricultural Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Production Loans [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 63,051 | 63,008
Residential Portfolio Segment [Member] | Consumer Borrower [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 1,203,641 | 1,161,135
Residential Portfolio Segment [Member] | Consumer Borrower [Member] | Real Estate, First Lien [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 894,402 | 921,019
Residential Portfolio Segment [Member] | Consumer Borrower [Member] | Construction Loans [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 34,124 | 33,547
Residential Portfolio Segment [Member] | Consumer Borrower [Member] | Home Equity Loan [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 234,681 | 162,509
Residential Portfolio Segment [Member] | Consumer Borrower [Member] | Real Estate, Junior Lien [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 40,434 | 44,060
Consumer Portfolio Segment [Member] | Consumer Borrower [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | 1,245,355 | 1,205,257
Consumer Portfolio Segment [Member] | Consumer Borrower [Member] | Consumer, Other [Member] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | $ 41,714 | $ 44,122

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