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Note 9 - Derivative Financial Instruments - Interest Rate Swaps (Details) - Not Designated as Hedging Instrument [Member] - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Forward Contracts [Member]    
Derivatives notional amount $ 274.9 $ 171.6
Derivatives Assets, fair value 0.2 0.6
Derivatives liabilities, fair value 0.5 0.0
Interest Rate Lock Commitments [Member]    
Derivatives notional amount 135.1 136.2
Derivatives Assets, fair value 0.8 0.3
Derivatives liabilities, fair value 0.0 0.0
Interest Rate Swaption [Member]    
Derivatives notional amount 169.4 140.2
Derivatives Assets, fair value 7.3 12.6
Derivatives liabilities, fair value $ 7.3 $ 12.6