v3.26.3
Note 9 - Investments (Details Textual) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Debt Securities, Held-to-Maturity, Amortized Cost, Unrealized Losses, Transfers In, Amount $ 21,900 $ 24,200
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss 4,300 4,800
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss 1,600 2,400
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss 277,577 290,811
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 14 15
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Investment, Proportional Amortization Method, Elected, Amount 25,400  
Investment Program, Proportional Amortization Method, Elected, Commitment 8,100  
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense 2,300  
Investment Program, Proportional Amortization Method, Applied, Amortization Expense 2,200  
Investment Tax Credit 4,900  
Other Tax Benefits, Investments 800  
Investment Amortization Expense 5,100  
Income Tax Expense (Benefit), Investments 600  
Low-Income Housing Tax Credit (“LIHTC”) Fund Investments [Member]    
Investment, Proportional Amortization Method, Elected, Amount   22,600
Investment Program, Proportional Amortization Method, Elected, Commitment   6,600
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense   2,900
Investment Program, Proportional Amortization Method, Applied, Amortization Expense   $ 3,000
Investment Program, Proportional Amortization Method, Elected, Impairment Loss 0  
Financial Asset, Past Due [Member]    
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss $ 0