Note 21 - Segment and Related Information - Segment Information (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income	$ 96,004	$ 120,229	$ 96,004	$ 95,796
Interest expense	5,766	35,647	5,766	5,405
Noninterest income	18,807	18,336	18,807	21,031
Noninterest expense	64,086	68,050	64,086	59,008
Income before income taxes	43,362	34,373	43,362	55,239
Net income	34,428	26,159	34,428	43,526
Depreciation and amortization	3,506	3,162		3,707
Total assets	3,065,902	3,090,717	3,065,902	3,334,597
Goodwill	85,048	85,048	85,048	85,018
Capital expenditures	1,196	1,538	$ 1,196	1,000
Community Banking [Member] | Operating Segments [Member]
Interest income	96,004	120,229		95,796
Interest expense	5,766	35,647		5,405
Noninterest income	12,286	11,585		15,012
Noninterest expense	61,173	65,008		56,251
Income before income taxes	39,754	30,664		51,977
Net income	31,578	23,229		40,949
Depreciation and amortization	3,496	3,157		3,697
Total assets	3,065,611	3,090,502		3,334,347
Goodwill	85,048	85,048		85,018
Capital expenditures	1,196	1,538		1,000
Trust and Investment Services [Member] | Operating Segments [Member]
Interest income	0	0		0
Interest expense	0	0		0
Noninterest income	6,521	6,751		6,019
Noninterest expense	2,913	3,042		2,757
Income before income taxes	3,608	3,709		3,262
Net income	2,850	2,930		2,577
Depreciation and amortization	10	5		10
Total assets	291	215		250
Goodwill	0	0		0
Capital expenditures	$ 0	$ 0		$ 0