Note 4 - Loans and Allowance for Credit Losses on Loans - Loans by Loan Portfolio Class (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Loans	[1],[2]	$ 4,847,683	$ 4,169,303
Home Equity Line of Credit [Member]
Loans	[1]	186,024	138,976
Credit Card Receivable [Member]
Loans		20,732	17,087
Commercial Real Estate Portfolio Segment [Member]
Loans	[1]	2,200,814	1,806,649
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans	[1]	1,397,633	1,128,244
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans	[1]	803,181	678,405
Commercial and Industrial Portfolio Segment [Member] | Term, Excluding PPP [Member]
Loans	[1]	669,241	596,710
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Loans		669,241
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member]
Loans	[1]	71,361	140,734
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Loans	[1]	414,739	370,312
Total Commercial and Industrial Portfolio Segment [Member]
Loans	[1]	1,155,341	1,107,756
Residential Real Estate Portfolio Segment [Member]
Loans	[1]	789,250	681,713
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans	[1]	297,127	281,018
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans	[1]	492,123	400,695
Construction and Development [Member]
Loans	[1]	346,372	299,206
Consumer Portfolio Segment [Member]
Loans	[1]	135,198	104,294
Finance Leases Portfolio Segment [Member]
Loans	[1]	$ 13,952	$ 13,622

[1] Pursuant to the CARES Act, loan deferrals granted to borrowers experiencing business interruptions related to the pandemic were not classified as TDRs and not included in past due and/or non-performing loan statistics. As of March 31, 2022 and December 31, 2021, outstanding CARES Act loan deferrals of $165,000 and $169,000 are reflected as current, respectively.

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