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Note 20 - Fair Value Measurements and Fair Value of Financial Instruments - Quantitative Information About Significant Unobservable Inputs (Details) $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Securities available-for-sale | $ 634,884 | $ 534,507
Fair Value, Recurring [Member] |  |
Securities available-for-sale | 634,884 | 534,507
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 7,349 | 8,565
US States and Political Subdivisions Debt Securities [Member] |  |
Securities available-for-sale | 142,896 | 145,625
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | 142,896 | 145,625
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Securities available-for-sale | $ 7,349 | $ 8,565
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 | 0.043 | 0.029

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