Note 4 - Loans - Schedule of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Loans	$ 4,788,402	$ 3,293,544
Net deferred loan costs	11,662	11,169
Allowance for credit losses	(54,684)	(36,811)	$ (35,549)	$ (35,863)
Net loans	4,745,380	3,267,902
Commercial Real Estate Portfolio Segment [Member]
Allowance for credit losses	(30,049)	(20,064)	(19,480)	(19,259)
Commercial Real Estate Portfolio Segment [Member] \| Owner Occupied [Member]
Loans	626,711	393,061
Commercial Real Estate Portfolio Segment [Member] \| Nonowner Occupied [Member]
Loans	1,047,722	710,468
Commercial Real Estate Portfolio Segment [Member] \| Farmland [Member]
Loans	231,601	211,370
Commercial Real Estate Portfolio Segment [Member] \| Other Loans [Member]
Loans	403,988	294,587
Commercial Portfolio Segment [Member]
Allowance for credit losses	(8,041)	(4,536)	(4,383)	(4,628)
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Loans	591,409	340,224
Commercial Portfolio Segment [Member] \| Agricultural [Member]
Loans	52,414	54,195
Residential Portfolio Segment [Member]
Allowance for credit losses	(11,331)	(7,241)	(7,065)	(7,271)
Residential Portfolio Segment [Member] \| 1-4 Family Residential [Member]
Loans	1,219,766	850,300
Residential Portfolio Segment [Member] \| Home Equity Loan [Member]
Loans	349,656	181,544
Consumer Portfolio Segment [Member]
Allowance for credit losses	(5,263)	(4,970)	$ (4,621)	$ (4,705)
Consumer Portfolio Segment [Member] \| Other Loans [Member]
Loans	10,020	10,070
Consumer Portfolio Segment [Member] \| Indirect Loans [Member]
Loans	233,576	231,242
Consumer Portfolio Segment [Member] \| Direct Loans [Member]
Loans	$ 21,539	$ 16,483