Quarterly report [Sections 13 or 15(d)]

Note 4 - Securities (Details Textual)

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Note 4 - Securities (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest $ 0 $ 0   $ 0
Debt Securities, Available-for-Sale, Realized Gain (Loss)   (8,563) $ 0  
Collateralized Mortgage-Backed Securities [Member]        
Debt Securities, Available-for-Sale, Sold at Par Value 70,500      
Debt Securities, Available-for-Sale, Realized Gain (Loss) (8,600)      
US Treasury Securities and Residential Mortgage-Backed Securities [Member]        
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0 0   0
US States and Political Subdivisions Debt Securities [Member]        
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0   0
Asset Not Pledged as Collateral and Asset Pledged as Collateral without Right [Member]        
Debt Securities $ 1,290,000 $ 1,290,000   $ 1,430,000