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Note 4 - Securities - Securities Available-for-sale (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Securities available-for-sale, amortized costs	$ 665,244	$ 680,496
Securities available-for-sale, gross unrealized gains	29	24
Securities available-for-sale, gross unrealized losses	69,020	78,622
Securities available-for-sale, fair values	596,253	601,898
US Government Agencies Debt Securities [Member]
Securities available-for-sale, amortized costs	340,195	351,136
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	33,268	40,012
Securities available-for-sale, fair values	306,927	311,124
US States and Political Subdivisions Debt Securities [Member]
Securities available-for-sale, amortized costs	177,944	178,106
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	30,332	32,372
Securities available-for-sale, fair values	147,612	145,734
Collateralized Mortgage-Backed Securities [Member]
Securities available-for-sale, amortized costs	140,597	143,747
Securities available-for-sale, gross unrealized gains	29	24
Securities available-for-sale, gross unrealized losses	4,698	5,473
Securities available-for-sale, fair values	135,928	138,298
Corporate Debt Securities [Member]
Securities available-for-sale, amortized costs	6,508	6,507
Securities available-for-sale, gross unrealized gains	0	0
Securities available-for-sale, gross unrealized losses	722	764
Securities available-for-sale, fair values	$ 5,786	5,743
US Treasury Securities [Member]
Securities available-for-sale, amortized costs		1,000
Securities available-for-sale, gross unrealized gains		0
Securities available-for-sale, gross unrealized losses		1
Securities available-for-sale, fair values		$ 999

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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