Note 23 - Condensed Financial Statements of Parent Company - Parent Company Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net gains on equity investments	$ 740	$ 265	$ 202
Interest expense	85,979	29,761	12,483
Income tax expense	15,163	14,094	11,663
Preferred stock dividends	900	900	589
Net income applicable to common shares	54,339	52,316	45,149
Parent Company [Member]
Dividends from subsidiaries	17,300	15,800	12,100
Other dividends and interest income	500	26	16
Net gains on equity investments	740	265	202
Management and service fees from subsidiaries	1,776	2,088	1,920
Total income	20,316	18,179	14,238
Interest expense	5,937	5,256	2,497
Operating expenses	3,812	3,283	3,736
Total expenses	9,749	8,539	6,233
Income before income taxes and equity in undistributed income of subsidiaries	10,567	9,640	8,005
Income tax expense	(1,345)	(1,251)	(830)
Income before equity in undistributed income of subsidiaries	11,912	10,891	8,835
Equity in undistributed income of subsidiaries	43,327	42,325	36,903
Net income	55,239	53,216	45,738
Preferred stock dividends	900	900	589
Net income applicable to common shares	$ 54,339	$ 52,316	$ 45,149