v3.26.1
Note 4 - Loans and Allowance for Credit Losses - Schedule of Modified Financing Receivables (Details) - Commercial Borrower [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Agricultural Real Estate Portfolio Segment [Member] | Land [Member]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage   2.20%   2.20%
Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Contractual Interest Rate Reduction [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction   $ 0   $ 0
Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Principal Forgiveness [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction   0   0
Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Extended Maturity [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction   0   0
Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Payment Deferral [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction   1,457   1,457
Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Extended Maturity and Principal Forgiveness [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction   0   0
Agricultural Real Estate Portfolio Segment [Member] | Land [Member] | Extended Maturity and Interest Rate Reduction [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction   $ 0   $ 0
Commercial and Industrial Portfolio Segments [Member]        
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage 0.10%   0.10%  
Commercial and Industrial Portfolio Segments [Member] | Contractual Interest Rate Reduction [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction $ 0   $ 0  
Commercial and Industrial Portfolio Segments [Member] | Principal Forgiveness [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction 0   0  
Commercial and Industrial Portfolio Segments [Member] | Extended Maturity [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction 0   0  
Commercial and Industrial Portfolio Segments [Member] | Payment Deferral [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction 796   796  
Commercial and Industrial Portfolio Segments [Member] | Extended Maturity and Principal Forgiveness [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction 0   0  
Commercial and Industrial Portfolio Segments [Member] | Extended Maturity and Interest Rate Reduction [Member]        
Financing Receivable, Excluding Accrued Interest, Modified, Interest Rate Reduction $ 0   $ 0