v3.26.1
Note 3 - Investment Securities (Details Textual)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Debt Securities, Trading $ 501   $ 501   $ 1,758
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 115   115   123
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Recovery (Writeoff) 0        
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss 2,100   2,100   1,900
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss 1,100   1,100   1,200
Proceeds from Sale of Debt Securities, Available-for-Sale 0   0    
Proceeds from Calls of Debt Securities, Available-for-Sale 3,000 $ 9,000 3,000 $ 19,000  
Proceeds from Sale of Held-to-Maturity Securities 0   0    
Debt Securities, Held-to-Maturity, Nonaccrual 0   0   0
Debt Securities, Held-to-Maturity, Nonaccrual, Interest Income 0 $ 0      
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 784,346   784,346   771,308
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss 242,631   242,631    
Financial Asset, Past Due [Member]          
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss $ 0   $ 0   0
Preferred Class B [Member] | Visa [Member]          
Investment Owned, Conversion Ratio 1.5445   1.5445    
Investment Owned, Balance, Shares (in shares) | shares 6,924   6,924    
Investment, Tax Basis, Cost $ 0   $ 0   0
Preferred Class A [Member] | Visa [Member]          
Investment Owned, Balance, Shares (in shares) | shares 10,694   10,694    
Asset Pledged as Collateral [Member] | Deposits [Member]          
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss $ 330,000   $ 330,000   $ 115,100