Note 5 - Loans and Allowance for Credit Losses - Schedule of Total Loans Outstanding by Portfolio Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	$ 3,032,343	$ 2,759,583
Commercial Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	2,122,945	1,849,267
Consumer Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process		910,316
Commercial Portfolio Segment [Member] | Commercial Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	606,245	562,180
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	1,431,443	1,210,114
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Construction, Land, and Development [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	173,629	124,034
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Multifamily Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	275,377	245,103
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Non-Owner Occupied [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	686,071	569,354
Commercial Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Owner Occupied Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	296,366	271,623
Agricultural Real Estate Portfolio Segment [Member] | Commercial Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	85,257	76,973
Agricultural Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Land [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	45,821	40,832
Agricultural Real Estate Portfolio Segment [Member] | Commercial Borrower [Member] | Production Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	39,436	36,141
Residential Portfolio Segment [Member] | Consumer Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	873,005	881,013
Residential Portfolio Segment [Member] | Consumer Borrower [Member] | Real Estate, First Lien [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	690,451	697,900
Residential Portfolio Segment [Member] | Consumer Borrower [Member] | Construction Loans [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	11,808	28,979
Residential Portfolio Segment [Member] | Consumer Borrower [Member] | Home Equity Loan [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	134,301	118,315
Residential Portfolio Segment [Member] | Consumer Borrower [Member] | Real Estate, Junior Lien [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	36,445	35,819
Consumer Portfolio Segment [Member] | Consumer Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	909,398
Consumer Portfolio Segment [Member] | Consumer Borrower [Member] | Consumer, Other [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process	$ 36,393	$ 29,303