Note 21 - Parent Corporation Only Financial Statements - Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Dividends									$ 3,662	$ 1,655	$ 971
Net income	$ 19,273	$ 21,407	$ 21,394	$ 24,929	$ 32,557	$ 28,915	$ 32,358	$ 31,381	87,003	125,211	130,353
Preferred dividends	1,509	1,509	1,509	1,509	1,510	1,509	1,509	1,509	6,036	6,037	1,717
Net income available to common stockholders	$ 17,764	$ 19,898	$ 19,885	$ 23,420	$ 31,047	$ 27,406	$ 30,849	$ 29,872	80,967	119,174	128,636
Parent Company [Member]
Dividends									50,725	36,475	24,071
Other income									946	1,638	1,627
Total Income									51,671	38,113	25,698
Expenses									(6,359)	(8,928)	(8,741)
Income before equity in undistributed earnings of subsidiaries									45,312	29,185	16,957
Equity in undistributed earnings of subsidiaries									41,691	96,026	113,396
Net income									87,003	125,211	130,353
Preferred dividends									6,036	6,037	1,717
Net income available to common stockholders									$ 80,967	$ 119,174	$ 128,636