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Note 21 - Fair Value Measurements and Fair Value of Financial Instruments - Quantitative Information About Significant Unobservable Inputs (Details)
$ in Thousands
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Securities available-for-sale $ 612,847 $ 617,162
Fair Value, Recurring [Member]    
Securities available-for-sale 612,847 617,162
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Securities available-for-sale 6,526 7,122
US States and Political Subdivisions Debt Securities [Member]    
Securities available-for-sale 122,404 132,705
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]    
Securities available-for-sale 122,404 132,705
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Securities available-for-sale $ 6,526 $ 7,122
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member]    
Securities available-for-sale, rate 0.05 0.043