Note 3 - Loans and Allowance for Credit Losses on Loans - Loans by Loan Portfolio Class (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Loans	[1]	$ 6,278,133	$ 5,771,038
Home Equity Line of Credit [Member]
Loans		236,819	211,390
Credit Card Receivable [Member]
Loans		26,285	23,632
Commercial Real Estate Portfolio Segment [Member]
Loans		2,635,986	2,469,113
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans		1,686,448	1,561,689
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans		949,538	907,424
Commercial and Industrial Portfolio Segment [Member]
Loans		865,384	867,380
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Loans		513,909	439,748
Total Commercial and Industrial Portfolio Segment [Member]
Loans		1,379,293	1,307,128
Residential Real Estate Portfolio Segment [Member]
Loans		1,164,388	1,067,608
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans		381,051	358,715
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans		783,337	708,893
Construction and Development [Member]
Loans		674,918	531,324
Consumer Portfolio Segment [Member]
Loans		143,684	145,340
Finance Leases Portfolio Segment [Member]
Loans		$ 16,760	$ 15,503

[1] (1) Total loans are presented inclusive of premiums, discounts and net loan origination fees and costs.