Note 7 - Loans and the Allowance for Loan Losses - Loans Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loans	$ 4,992,785	$ 4,606,176
Allowance for loan losses	(40,414)	(38,178)	$ (29,112)
Net loans	4,952,371	4,567,998
Commercial Real Estate Portfolio Segment [Member]
Loans	3,570,120	3,398,858
Commercial Real Estate Portfolio Segment [Member] | Commercial [Member]
Loans	2,217,928	2,020,406
Allowance for loan losses	(17,676)	(14,702)	(10,515)
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans	669,798	722,074
Allowance for loan losses	(6,596)	(5,768)	(4,498)
Commercial Real Estate Portfolio Segment [Member] | Residential [Member]
Loans	682,394	656,378
Allowance for loan losses	(5,485)	(5,354)	(4,565)
Commercial Portfolio Segment [Member]
Loans	1,358,838	1,153,873
Allowance for loan losses	(10,424)	(11,721)	(9,016)
Consumer Portfolio Segment [Member]
Loans	63,827	53,445
Allowance for loan losses	$ (233)	$ (633)	$ (518)