Note 23 - Segments - Financial Information by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Net interest income	$ 63,072	$ 48,760
Provision for credit losses	2,625	2,279
All other non-interest income	12,520	10,960
Non-interest expenses	45,314	56,297
Income before income tax expense	37,180	9,387
Income tax expense	8,132	1,445
Net income	29,048	7,942
Less net income attributed to NCI	0	36
Net income available to stockholders	29,048	7,906
Segment assets	7,667,648	7,777,152	$ 7,496,261
Fiduciary and Trust [Member]
Wealth management and trust services	9,527	8,243
Commercial Banking [Member]
Net interest income	62,944	48,653
Provision for credit losses	2,625	2,279
All other non-interest income	12,520	10,960
Non-interest expenses	39,600	51,690
Income before income tax expense	33,239	5,644
Income tax expense	7,277	633
Net income	25,962	5,011
Less net income attributed to NCI	0	0
Net income available to stockholders	25,962	5,011
Segment assets	7,631,031	7,744,189
Commercial Banking [Member] | Fiduciary and Trust [Member]
Wealth management and trust services	0	0
Investment Management and Trust [Member]
Net interest income	128	107
Provision for credit losses	0	0
All other non-interest income	0	0
Non-interest expenses	5,714	4,607
Income before income tax expense	3,941	3,743
Income tax expense	855	812
Net income	3,086	2,931
Less net income attributed to NCI	0	36
Net income available to stockholders	3,086	2,895
Segment assets	36,617	32,963
Investment Management and Trust [Member] | Fiduciary and Trust [Member]
Wealth management and trust services	$ 9,527	$ 8,243