Note 5 - Credit Quality - Loans by Credit Quality (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Non-covered loans	$ 2,176,952	$ 2,101,599
Covered loans	9,680	12,861
Total loans	2,186,632	2,114,460
Commercial Portfolio Segment [Member]
Non-covered loans	1,284,735	1,238,814
Covered loans	210	230
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	44,649	48,659
Covered loans	25	28
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	173,024	142,962
Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	115,161	121,840
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	187,598	163,181
Covered loans	185	199
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	734,793	727,261
Covered loans		3
Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	9,749	11,756
Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	19,761	23,155
Consumer Real Estate Portfolio Segment [Member]
Non-covered loans	765,830	748,016
Covered loans	9,470	12,631
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	89,432	110,078
Covered loans	7,094	9,853
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	658,678	620,697
Covered loans	2,376	2,778
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	17,720	17,241
Consumer and Other Portfolio Segment [Member]
Non-covered loans	126,387	114,769
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	120,373	110,027
Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans	6,014	4,742
Pass [Member]
Non-covered loans	1,904,312	1,977,756
Covered loans	8,325	9,487
Total loans	1,912,637	1,987,243
Pass [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	36,934	45,781
Covered loans	0	0
Pass [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	160,474	135,651
Pass [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	103,291	118,045
Pass [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	165,146	149,916
Covered loans	151	199
Pass [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	568,438	683,481
Covered loans		0
Pass [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	7,724	11,299
Pass [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	13,527	17,609
Pass [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	85,316	106,246
Covered loans	6,396	7,177
Pass [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	622,082	580,580
Covered loans	1,778	2,111
Pass [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	17,232	16,341
Pass [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	118,134	108,065
Pass [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans	6,014	4,742
Special Mention [Member]
Non-covered loans	165,294	68,287
Covered loans	700	2,630
Total loans	165,994	70,917
Special Mention [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	4,950	2,079
Covered loans	25	28
Special Mention [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	7,031	4,327
Special Mention [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	8,586	2,468
Special Mention [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	9,602	7,489
Covered loans	34	0
Special Mention [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	125,907	27,160
Covered loans		0
Special Mention [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	1,686	122
Special Mention [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	2,597	4,107
Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	1,112	2,014
Covered loans	376	2,327
Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	3,594	17,001
Covered loans	265	275
Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	201	179
Special Mention [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	28	1,341
Special Mention [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans	0	0
Substandard [Member]
Non-covered loans	107,334	55,556
Covered loans	655	744
Total loans	107,989	56,300
Substandard [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	2,765	799
Covered loans	0	0
Substandard [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	5,519	2,984
Substandard [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	3,284	1,327
Substandard [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	12,838	5,776
Covered loans	0	0
Substandard [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	40,448	16,620
Covered loans		3
Substandard [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	339	335
Substandard [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	3,637	1,439
Substandard [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	3,004	1,818
Covered loans	322	349
Substandard [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	33,002	23,116
Covered loans	333	392
Substandard [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	287	721
Substandard [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	2,211	621
Substandard [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans	0	0
Doubtful [Member]
Non-covered loans	12	0
Covered loans	0	0
Total loans	12	0
Doubtful [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	0	0
Covered loans	0	0
Doubtful [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	0	0
Doubtful [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	0	0
Doubtful [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	12	0
Covered loans	0	0
Doubtful [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	0	0
Covered loans		0
Doubtful [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	0	0
Doubtful [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	0	0
Doubtful [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	0	0
Covered loans	0	0
Doubtful [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	0	0
Covered loans	0	0
Doubtful [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	0	0
Doubtful [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	0	0
Doubtful [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans	0	0
Unlikely to be Collected Financing Receivable [Member]
Non-covered loans	0	0
Covered loans	0	0
Total loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	0	0
Covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	0	0
Covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	0	0
Covered loans		0
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	0	0
Covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	0	0
Covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans	$ 0	$ 0