Note 22 - Segments - Financial Information by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Net interest income	$ 60,929		$ 56,984		$ 124,001	$ 105,744
Provision for credit losses	2,350		(200)		4,975	2,079
All other non-interest income	12,714		12,445		25,234	23,405
Non-interest expenses	45,800		44,675		91,114	100,972
Income before income tax expense	35,639		34,449		72,819	43,836
Income tax expense	7,975		7,547		16,107	8,992
Net income	27,664	$ 29,048	26,902	$ 7,942	56,712	34,844
Less net income attributed to NCI	0		108		0	144
Net income available to stockholders	27,664		26,794		56,712	34,700
Segment assets	7,732,552		7,583,105		7,732,552	7,583,105	$ 7,496,261
Fiduciary and Trust [Member]
Wealth management and trust services	10,146		9,495		19,673	17,738
Commercial Banking [Member]
Net interest income	60,796		56,888		123,740	105,541
Provision for credit losses	2,350		(200)		4,975	2,079
All other non-interest income	12,714		12,445		25,234	23,405
Non-interest expenses	39,877		38,876		79,477	90,566
Income before income tax expense	31,283		30,657		64,522	36,301
Income tax expense	7,030		6,724		14,307	7,357
Net income	24,253		23,933		50,215	28,944
Less net income attributed to NCI	0		108		0	144
Net income available to stockholders	24,253		23,825		50,215	28,800
Segment assets	7,696,386		7,550,846		7,696,386	7,550,846
Commercial Banking [Member] | Fiduciary and Trust [Member]
Wealth management and trust services	0		0		0	0
Investment Management and Trust [Member]
Net interest income	133		96		261	203
Provision for credit losses	0		0		0	0
All other non-interest income	0		0		0	0
Non-interest expenses	5,923		5,799		11,637	10,406
Income before income tax expense	4,356		3,792		8,297	7,535
Income tax expense	945		823		1,800	1,635
Net income	3,411		2,969		6,497	5,900
Less net income attributed to NCI	0		0		0	0
Net income available to stockholders	3,411		2,969		6,497	5,900
Segment assets	36,166		32,259		36,166	32,259
Investment Management and Trust [Member] | Fiduciary and Trust [Member]
Wealth management and trust services	$ 10,146		$ 9,495		$ 19,673	$ 17,738