Note 5 - Loans - Loans by Loan Portfolio Class (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Loans	[1]	$ 2,845,016	$ 2,548,171
Commercial and Industrial Portfolio Segment [Member]
Loans		870,511	833,524
Construction and Development Excluding Undeveloped Land Portfolio Segment [Member]
Loans	[2]	213,822	225,050
Undevelopment Land Portfolio Segment [Member]
Loans		46,360	30,092
Real Estate Mortgage Portfolio Segment [Member]
Loans		1,666,856	1,411,447
Real Estate Mortgage Portfolio Segment [Member] | Commercial Investment [Member]
Loans		736,618	588,610
Real Estate Mortgage Portfolio Segment [Member] | Owner Occupied Commercial [Member]
Loans		473,783	426,373
Real Estate Mortgage Portfolio Segment [Member] | One to Four Family Residential [Member]
Loans		334,358	276,017
Real Estate Mortgage Portfolio Segment [Member] | Home Equity First Lien [Member]
Loans		48,620	49,500
Real Estate Mortgage Portfolio Segment [Member] | Home Equity Junior Lien [Member]
Loans		73,477	70,947
Consumer Portfolio Segment [Member]
Loans		$ 47,467	$ 48,058

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

[2] Consists of land acquired for development by the borrower, but for which no development has yet taken place.