Note 21 - Parent Corporation Only Financial Statements - Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Dividends									$ 1,655	$ 971	$ 1,642
Net income	$ 32,557	$ 28,915	$ 32,358	$ 31,381	$ 33,038	$ 32,097	$ 32,219	$ 32,999	125,211	130,353	71,289
Preferred dividends	1,510	1,509	1,509	1,509	1,717	0	0	0	6,037	1,717	0
Net income available to common stockholders	$ 31,047	$ 27,406	$ 30,849	$ 29,872	$ 31,321	$ 32,097	$ 32,219	$ 32,999	119,174	128,636	71,289
Parent Company [Member]
Dividends									36,475	24,071	15,200
Other income									1,638	1,627	1,683
Total Income									38,113	25,698	16,883
Expenses									(8,928)	(8,741)	(9,263)
Income before equity in undistributed earnings of subsidiaries									29,185	16,957	7,620
Equity in undistributed earnings of subsidiaries									96,026	113,396	63,669
Net income									125,211	130,353	71,289
Preferred dividends									6,037	1,717	0
Net income available to common stockholders									$ 119,174	$ 128,636	$ 71,289