Note 3 - Loans - Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021		Dec. 31, 2020
Loans and Leases Receivable, Net of Deferred Income, Total	$ 1,978,640		$ 2,015,056
Commercial Portfolio Segment [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	447,109	[1]	491,256
Commercial Real Estate Portfolio Segment [Member] | Construction and Land Development [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	159,801		140,071
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	364,549		373,680
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	628,742		627,569
Residential Portfolio Segment [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	367,238		374,018
Residential Portfolio Segment [Member] | Non-owner Occupied Commercial Real Estate [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	628,742		627,569
Residential Portfolio Segment [Member] | Residential [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	266,595		269,137
Residential Portfolio Segment [Member] | Home Equity Line of Credit [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	100,643		104,881
Consumer Portfolio Segment [Member]
Loans and Leases Receivable, Net of Deferred Income, Total	$ 11,201		$ 8,462

[1] Includes PPP loans, which are guaranteed by the SBA and have no related allowance.