Note 20 - Parent Company Only Financial Statements - Condensed Statements of Income (Details) - USD ($) $ in Thousands		1 Months Ended		12 Months Ended
	Nov. 30, 2022	Nov. 30, 2022	Nov. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Securities gains					$ (88)	$ 2,484
Revenue				$ 373,300	300,577	312,171
Total interest expense				61,451	21,922	31,423
Salaries and employee benefits				115,368	100,907	96,268
Acquisition costs				3,715	624
Post-acquisition compensation, transition and integration costs				5,526		214
Disposition costs					13	690
Goodwill impairment	$ 0	$ 0	$ 0			500
Income before taxes				113,549	121,467	73,289
Income tax benefit				(14,483)	(22,562)	(12,707)
Net income				99,066	98,905	60,582
Parent Company [Member] | Reportable Legal Entities [Member]
Total interest income				26	3	29
Other				(53)	853	289
Revenue				130,208	118,720	79,681
Total interest expense				11,836	8,482	6,662
Salaries and employee benefits				15,551	12,446	11,825
Professional fees				1,789	1,983	2,558
Acquisition costs				3,715	624
Post-acquisition compensation, transition and integration costs				5,526		145
Disposition costs					13	312
Goodwill impairment						500
Other				3,331	2,784	2,505
Total expenses				41,748	26,332	24,507
Income before taxes				88,460	92,388	55,174
Income tax benefit				10,606	6,517	5,408
Net income				99,066	98,905	60,582
Parent Company [Member] | Reportable Legal Entities [Member] | Bank Subsidiaries [Member]
Equity in net income (loss) of bank subsidiaries				128,941	117,408	79,624
Parent Company [Member] | Reportable Legal Entities [Member] | Non-bank Subsidiaries [Member]
Equity in net income (loss) of bank subsidiaries				$ 1,294	$ 456	$ (261)