Note 28 - Segments - Financial Information by Business Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net interest income	$ 247,332	$ 233,383	$ 171,074
Provision for credit losses	13,796	10,257	(753)
All other non-interest income	52,418	53,038	38,237
Non-interest expenses	187,829	191,791	142,280
Income before income tax expense	137,927	120,484	95,397
Income tax expense	30,179	27,190	20,752
Net income	107,748	93,294	74,645
Total assets	8,170,102	7,496,261	6,646,025
Less net income attributable to NCI	0	322	0
Net income available to stockholders	107,748	92,972	74,645
Fiduciary and Trust [Member]
Wealth management and trust services	39,802	36,111	27,613
Commercial Banking [Member]
Net interest income	246,624	232,971	170,775
Provision for credit losses	13,796	10,257	(753)
All other non-interest income	52,418	53,038	38,237
Non-interest expenses	163,316	170,348	128,091
Income before income tax expense	121,930	105,404	81,674
Income tax expense	26,708	23,917	17,774
Net income	95,222	81,487
Total assets	8,134,923	7,459,312	6,641,916
Less net income attributable to NCI		322
Net income available to stockholders		81,165	63,900
Commercial Banking [Member] | Fiduciary and Trust [Member]
Wealth management and trust services	0	0	0
Investment Management and Trust [Member]
Net interest income	708	412	299
Provision for credit losses	0	0	0
All other non-interest income	0	0	0
Non-interest expenses	24,513	21,443	14,189
Income before income tax expense	15,997	15,080	13,723
Income tax expense	3,471	3,273	2,978
Net income	12,526	11,807
Total assets	35,179	36,949	4,109
Less net income attributable to NCI		0
Net income available to stockholders		11,807	10,745
Investment Management and Trust [Member] | Fiduciary and Trust [Member]
Wealth management and trust services	$ 39,802	$ 36,111	$ 27,613