Note 4 - Loans and Allowance for Credit Losses on Loans - Loans by Loan Portfolio Class (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Loans	[1],[2]	$ 4,189,117	$ 3,531,596
Home Equity Line of Credit [Member]
Loans	[1]	140,027	95,366
Commercial Real Estate Portfolio Segment [Member]
Loans	[1]	1,795,278	1,342,142
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans	[1]	1,142,647	833,470
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans	[1]	652,631	508,672
Commercial and Industrial Portfolio Segment [Member] | Term, Excluding PPP [Member]
Loans	[1]	581,804	525,776
Commercial and Industrial Portfolio Segment [Member] | Term [Member]
Loans			525,776
Commercial and Industrial Portfolio Segment [Member] | Term [Member] | Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member]
Loans	[1]	231,335	550,186
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Loans	[1]	329,119	249,378
Total Commercial and Industrial Portfolio Segment [Member]
Loans	[1]	1,142,258	1,325,340
Residential Real Estate Portfolio Segment [Member]
Loans	[1]	675,114	380,121
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans	[1]	277,045	140,930
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans	[1]	398,069	239,191
Construction and Development [Member]
Loans	[1]	303,642	291,764
Consumer Portfolio Segment [Member]
Loans	[1]	104,629	71,874
Finance Leases Portfolio Segment [Member]
Loans	[1]	12,348	14,786
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans		$ 15,821	$ 10,203

[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 September 30, 2021 and December 31, 2020, outstanding CARES Act loan deferrals of $355,000 and $37 million are reflected as current, respectively.

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