Note 4 - Loans and Allowance for Credit Losses on Loans - Loans by Loan Portfolio Class (Details) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020
Loans	[1],[2]	$ 4,206,392	$ 3,531,596
Home Equity Line of Credit [Member]
Loans	[1]	142,468	95,366
Commercial Real Estate Portfolio Segment [Member]
Loans	[1]	1,774,581	1,342,142
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans	[1]	1,170,461	833,470
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans	[1]	604,120	508,672
Commercial and Industrial Portfolio Segment [Member] | Term, Excluding PPP [Member]
Loans	[1]	544,316	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]	377,021	550,186
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Loans	[1]	327,990	276,646
Total Commercial and Industrial Portfolio Segment [Member]
Loans	[1]	1,249,327	1,352,608
Residential Real Estate Portfolio Segment [Member]
Loans	[1]	651,565	380,121
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans	[1]	273,782	140,930
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans	[1]	377,783	239,191
Construction and Development [Member]
Loans	[1]	281,149	291,764
Consumer Portfolio Segment [Member]
Loans	[1]	78,171	44,606
Finance Leases Portfolio Segment [Member]
Loans	[1]	14,171	14,786
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans		$ 14,960	$ 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 June 30, 2021 and December 31, 2020, outstanding CARES Act loan deferrals of $8 million and $37 million are reflected as current, respectively.

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