Note 16 - Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Net interest income (loss)	$ 43,032	$ 24,001	$ 84,189	$ 46,220
Provision for credit losses	0	4,489	863	4,489
Noninterest income (loss)	31,763	27,371	59,395	52,694
Compensation	24,343	20,265	47,304	39,597
Employee taxes and benefits	6,633	5,134	14,396	11,322
Business services, software and technology expense	5,868	4,599	11,620	9,944
Merger and acquisition expense	11	563	297	591
Other	1,422	1,422	4,282	2,306
Total noninterest expense	48,438	38,752	98,805	77,771
Income before income taxes	26,357	8,131	43,916	16,654
Total assets	5,323,822	4,358,623	5,323,822	4,358,623	$ 5,261,673
Other Noninterest [Member]
Other	11,583	8,191	25,188	16,317
Operating Segments [Member] | Banking Segment [Member]
Net interest income (loss)	43,684	24,684	85,491	47,581
Provision for credit losses	0	4,489	863	4,489
Noninterest income (loss)	8,436	4,999	13,083	8,489
Compensation	12,278	9,590	23,914	18,044
Employee taxes and benefits	3,289	2,450	7,169	5,252
Business services, software and technology expense	3,084	2,247	6,048	4,814
Merger and acquisition expense	0	0	0	0
Total noninterest expense	27,448	18,915	56,659	37,586
Income before income taxes	24,672	6,279	41,052	13,995
Total assets	5,244,506	4,282,868	5,244,506	4,282,868
Operating Segments [Member] | Banking Segment [Member] | Other Noninterest [Member]
Other	8,797	4,628	19,528	9,476
Operating Segments [Member] | Retirement and Benefit Services Segment [Member]
Net interest income (loss)	0	0	0	0
Provision for credit losses	0	0	0	0
Noninterest income (loss)	16,024	16,078	32,130	31,733
Compensation	7,064	6,841	14,280	13,796
Employee taxes and benefits	2,015	1,841	4,326	3,898
Business services, software and technology expense	1,930	1,644	3,924	3,687
Merger and acquisition expense	0	0	0	0
Total noninterest expense	13,166	13,422	26,783	27,611
Income before income taxes	2,858	2,656	5,347	4,122
Total assets	30,817	34,695	30,817	34,695
Operating Segments [Member] | Retirement and Benefit Services Segment [Member] | Other Noninterest [Member]
Other	2,157	3,096	4,253	6,230
Operating Segments [Member] | Wealth Management Segment [Member]
Net interest income (loss)	0	0	0	0
Provision for credit losses	0	0	0	0
Noninterest income (loss)	7,363	6,360	14,267	12,477
Compensation	3,383	2,517	6,435	5,096
Employee taxes and benefits	721	588	1,462	1,313
Business services, software and technology expense	686	581	1,304	1,178
Merger and acquisition expense	0	0	0	0
Total noninterest expense	5,132	3,908	9,969	7,658
Income before income taxes	2,231	2,452	4,298	4,819
Total assets	6,055	5,125	6,055	5,125
Operating Segments [Member] | Wealth Management Segment [Member] | Other Noninterest [Member]
Other	342	222	768	71
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Net interest income (loss)	(652)	(683)	(1,302)	(1,361)
Provision for credit losses	0	0	0	0
Noninterest income (loss)	(60)	(66)	(85)	(5)
Compensation	1,618	1,317	2,675	2,661
Employee taxes and benefits	608	255	1,439	859
Business services, software and technology expense	168	127	344	265
Merger and acquisition expense	11	563	297	591
Total noninterest expense	2,692	2,507	5,394	4,916
Income before income taxes	(3,404)	(3,256)	(6,781)	(6,282)
Total assets	42,444	35,935	42,444	35,935
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Other Noninterest [Member]
Other	$ 287	$ 245	$ 639	$ 540