Note 14 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Balance at Beginning of Year	$ 580,481	$ 433,368	$ 409,963
Other Comprehensive Income (Loss) on Equity Method Investments - Net of Tax	(616)	690
Other Comprehensive Income (Loss)	7,619	(73,027)	(11,805)
Balance at End of Year	644,259	580,481	433,368
AOCI Attributable to Parent [Member]
Balance at Beginning of Year	(74,204)	(1,177)	10,628
Other Comprehensive Income on AFS Securities Before Reclassifications - Net of Tax	10,258	(73,679)
Reclassification Adjustment for Gains (Losses) Realized - Net of Tax	(2,023)	(38)
Other Comprehensive Income (Loss)	7,619	(73,027)	(11,805)
Balance at End of Year	$ (66,585)	$ (74,204)	$ (1,177)