Note 5 - Credit Quality - Nonaccrual Loans by Loan Class (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Total nonaccrual loans	$ 22,003	$ 16,357
Non-covered Loans [Member]
Total nonaccrual loans	21,706	16,113
Covered Loans [Member]
Total nonaccrual loans	297	244
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Total nonaccrual loans	244	211
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member] | Non-covered Loans [Member]
Total nonaccrual loans	244	211
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member] | Covered Loans [Member]
Total nonaccrual loans	0	0
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Total nonaccrual loans	895	530
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Non-covered Loans [Member]
Total nonaccrual loans	895	530
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Covered Loans [Member]
Total nonaccrual loans	0	0
Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Total nonaccrual loans	946	1,144
Commercial Portfolio Segment [Member] | Multi-family Residential [Member] | Non-covered Loans [Member]
Total nonaccrual loans	946	1,144
Commercial Portfolio Segment [Member] | Multi-family Residential [Member] | Covered Loans [Member]
Total nonaccrual loans	0	0
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Total nonaccrual loans	2,990	1,286
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member] | Non-covered Loans [Member]
Total nonaccrual loans	2,990	1,286
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member] | Covered Loans [Member]
Total nonaccrual loans	0	0
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Total nonaccrual loans	6,343	3,400
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member] | Non-covered Loans [Member]
Total nonaccrual loans	6,343	3,400
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member] | Covered Loans [Member]
Total nonaccrual loans	0	0
Commercial Portfolio Segment [Member] | Agricultural [Member]
Total nonaccrual loans	217	158
Commercial Portfolio Segment [Member] | Agricultural [Member] | Non-covered Loans [Member]
Total nonaccrual loans	217	158
Commercial Portfolio Segment [Member] | Agricultural [Member] | Covered Loans [Member]
Total nonaccrual loans	0	0
Commercial Portfolio Segment [Member] | Farmland [Member]
Total nonaccrual loans	489	713
Commercial Portfolio Segment [Member] | Farmland [Member] | Non-covered Loans [Member]
Total nonaccrual loans	489	713
Commercial Portfolio Segment [Member] | Farmland [Member] | Covered Loans [Member]
Total nonaccrual loans	0	0
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Total nonaccrual loans	1,122	973
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member] | Non-covered Loans [Member]
Total nonaccrual loans	841	753
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member] | Covered Loans [Member]
Total nonaccrual loans	281	220
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Total nonaccrual loans	7,976	7,283
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member] | Non-covered Loans [Member]
Total nonaccrual loans	7,960	7,259
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member] | Covered Loans [Member]
Total nonaccrual loans	16	24
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Total nonaccrual loans	0	428
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member] | Non-covered Loans [Member]
Total nonaccrual loans	0	428
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member] | Covered Loans [Member]
Total nonaccrual loans	0	0
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Total nonaccrual loans	781	231
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member] | Non-covered Loans [Member]
Total nonaccrual loans	781	231
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member] | Covered Loans [Member]
Total nonaccrual loans	$ 0	$ 0