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Note 4 - Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Amortized cost, due in one year or less, available for sale securities	$ 21,930
Fair value, due in one year or less, available for sale securities	21,781
Amortized cost, due after one year through five years, available for sale securities	224,100
Fair value, due after one year through five years, available for sale securities	213,221
Amortized cost, due after five years through ten years, available for sale securities	223,667
Fair value, due after five years through ten years, available for sale securities	196,423
Amortized cost, due after ten years, available for sale securities	217,400
Fair value, due after ten years, available for sale securities	199,058
Amortized cost, total securities available for sale	687,097	$ 680,496
Fair value, total securities available for sale	$ 630,483	$ 601,898

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