Note 3 - Securities - Amortized Cost and Estimated Fair Values of Debt Securities (2) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Due in one year or less, amortized cost	$ 95,464
Due in one year or less, fair value	90,769
Due after one year through five years, amortized cost	131,611
Due after one year through five years, fair value	127,964
Due after five years through ten years, amortized cost	209,142
Due after five years through ten years, fair value	189,543
Due after ten years, amortized cost	89,962
Due after ten years, fair value	84,486
Available-for-sale securities, amortized cost	526,179	$ 545,274
Securities - available for sale	$ 492,762	$ 518,078

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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