Note 21 - Segment and Related Information - Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income	$ 96,004	$ 95,796	$ 95,840
Interest expense	5,766	5,405	12,020
Noninterest income	18,807	21,031	16,843
Noninterest expense	64,086	59,008	54,565
Income before income taxes	43,362	55,239	37,182
Net income	34,428	43,526	30,045
Depreciation and amortization	3,506	3,707	3,825
Total assets	3,065,902	3,334,597	3,050,010
Goodwill	85,048	85,048	85,048
Capital expenditures	1,196	1,000	2,694
Community Banking [Member] | Operating Segments [Member]
Interest income	96,004	95,796	95,840
Interest expense	5,766	5,405	12,020
Noninterest income	12,286	15,012	12,054
Noninterest expense	61,173	56,251	52,245
Income before income taxes	39,754	51,977	34,714
Net income	31,578	40,949	28,052
Depreciation and amortization	3,496	3,697	3,815
Total assets	3,065,611	3,334,347	3,049,779
Goodwill	85,048	85,048	85,048
Capital expenditures	1,196	1,000	2,690
Trust and Investment Services [Member] | Operating Segments [Member]
Interest income	0	0	0
Interest expense	0	0	0
Noninterest income	6,521	6,019	4,789
Noninterest expense	2,913	2,757	2,320
Income before income taxes	3,608	3,262	2,468
Net income	2,850	2,577	1,993
Depreciation and amortization	10	10	10
Total assets	291	250	231
Goodwill	0	0	0
Capital expenditures	$ 0	$ 0	$ 4