Note 14 - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Balance at Beginning of Year	$ 433,368	$ 409,963	$ 285,097
Other Comprehensive Income (Loss)	(73,027)	(11,805)	8,015
Balance at End of Year	580,481	433,368	409,963
AOCI Attributable to Parent [Member]
Balance at Beginning of Year	(1,177)	10,628	2,613
Other Comprehensive Income on AFS Securities Before Reclassifications - Net of Tax	(73,679)	(11,838)
Other Comprehensive Income (Loss) on Equity Method Investments	690	(266)
Reclassification Adjustment for Gains (Losses) Realized - Net of Tax	(38)	299
Other Comprehensive Income (Loss)	(73,027)	(11,805)	8,015
Balance at End of Year	$ (74,204)	$ (1,177)	$ 10,628