Note 17 - Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Net interest income (loss)	$ 22,542	$ 20,395	$ 68,761	$ 66,287
Provision for credit losses	1,661	0	6,150	550
Noninterest income (loss)	28,363	28,407	81,057	79,439
Noninterest expense	42,447	37,260	120,218	111,503
Income before income taxes	6,797	11,542	23,450	33,673
Assets	4,084,640	3,832,978	4,084,640	3,832,978	$ 3,907,713
Operating Segments [Member] | Banking Segment [Member]
Net interest income (loss)	23,220	21,073	70,803	68,285
Provision for credit losses	1,661	0	6,150	550
Noninterest income (loss)	4,940	4,660	13,428	13,440
Noninterest expense	20,269	18,881	57,837	56,832
Income before income taxes	6,230	6,852	20,244	24,343
Assets	4,009,535	3,801,230	4,009,535	3,801,230
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)	16,144	18,605	47,876	49,977
Noninterest expense	14,154	13,269	41,757	39,515
Income before income taxes	1,990	5,336	6,119	10,462
Assets	32,882	36,114	32,882	36,114
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)	6,684	5,271	19,161	15,915
Noninterest expense	3,838	3,351	11,494	9,703
Income before income taxes	2,846	1,920	7,667	6,212
Assets	5,288	4,224	5,288	4,224
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Net interest income (loss)	(678)	(678)	(2,042)	(1,998)
Provision for credit losses	0	0	0	0
Noninterest income (loss)	595	(129)	592	107
Noninterest expense	4,186	1,759	9,130	5,453
Income before income taxes	(4,269)	(2,566)	(10,580)	(7,344)
Assets	$ 36,935	$ (8,590)	$ 36,935	$ (8,590)