Note 3 - Loans and Allowance for Credit Losses on Loans - Loans by Loan Portfolio Class (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Loans	[1],[2]	$ 3,635,156	$ 3,531,596
Home Equity Line of Credit [Member]
Loans	[1]	91,233	95,366
Commercial Real Estate Portfolio Segment [Member]
Loans	[1]	1,403,839	1,342,142
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans	[1]	876,523	833,470
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans	[1]	527,316	508,672
Commercial and Industrial Portfolio Segment [Member] | Term, Excluding PPP [Member]
Loans	[1]	509,567	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]	612,885	550,186
Commercial and Industrial Portfolio Segment [Member] | Lines of Credit [Member]
Loans	[1]	260,206	276,646
Total Commercial and Industrial Portfolio Segment [Member]
Loans	[1]	1,382,658	1,352,608
Residential Real Estate Portfolio Segment [Member]
Loans	[1]	398,896	380,121
Residential Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Loans	[1]	136,380	140,930
Residential Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Loans	[1]	262,516	239,191
Construction and Development [Member]
Loans	[1]	281,815	291,764
Consumer Portfolio Segment [Member]
Loans	[1]	51,058	44,606
Finance Leases Portfolio Segment [Member]
Loans	[1]	14,115	14,786
Commercial Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans	[1]	$ 11,542	$ 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 March 31, 2021 and December 31, 2020, outstanding loan deferrals of $14 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.