Note 3 - Investment Securities - Schedule of Available for Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Amortized Cost	$ 681,670	$ 698,020
Gross Unrealized Gains	1,143	873
Gross Unrealized Losses	(67,463)	(74,114)
Debt Securities, Available-for-Sale	615,350	624,779
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	151,123	151,909
Gross Unrealized Gains	9	8
Gross Unrealized Losses	(17,573)	(16,374)
Debt Securities, Available-for-Sale	133,559	135,543
Passthrough Mortgage Securities [Member]
Amortized Cost	156,532	158,789
Gross Unrealized Gains	31	8
Gross Unrealized Losses	(25,368)	(29,357)
Debt Securities, Available-for-Sale	131,195	129,440
Collateralized Debt Obligations [Member]
Amortized Cost	159,799	166,014
Gross Unrealized Gains	853	595
Gross Unrealized Losses	(19,365)	(21,550)
Debt Securities, Available-for-Sale	141,287	145,059
Company Agency Obligations [Member]
Amortized Cost	95,216	102,308
Gross Unrealized Gains	250	262
Gross Unrealized Losses	(1,022)	(1,143)
Debt Securities, Available-for-Sale	94,444	101,427
Corporate Bond Securities [Member]
Amortized Cost	119,000	119,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,135)	(5,690)
Debt Securities, Available-for-Sale	$ 114,865	$ 113,310

Amount 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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+ Details