Note 5 - Credit Quality - Loans by Credit Quality (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Non-covered loans	$ 2,101,599	$ 1,756,269
Covered loans	12,861	18,815
Total loans	2,114,460	1,775,084
Commercial Portfolio Segment [Member]
Non-covered loans	1,238,814	1,056,807
Covered loans	230	279
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	48,659	63,508
Covered loans	28	35
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	142,962	104,863
Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	121,840	107,012
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	163,181	140,097
Covered loans	199	238
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	727,261	613,877
Covered loans	3	6
Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	11,756	8,545
Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	23,155	18,905
Consumer Real Estate Portfolio Segment [Member]
Non-covered loans	748,016	622,600
Covered loans	12,631	18,536
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	110,078	93,466
Covered loans	9,853	15,284
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	620,697	510,963
Covered loans	2,778	3,252
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	17,241	18,171
Consumer and Other Portfolio Segment [Member]
Non-covered loans	114,769	76,862
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	110,027	71,552
Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans	4,742	5,310
Pass [Member]
Non-covered loans	1,977,756	1,688,842
Covered loans	9,487	12,241
Total loans	1,987,243	1,701,083
Pass [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	45,781	61,877
Covered loans
Pass [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	135,651	102,044
Pass [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	118,045	104,183
Pass [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	149,916	131,443
Covered loans	199	223
Pass [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	683,481	595,659
Covered loans
Pass [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	11,299	8,328
Pass [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	17,609	16,898
Pass [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	106,246	91,194
Covered loans	7,177	9,511
Pass [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	580,580	482,794
Covered loans	2,111	2,507
Pass [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	16,341	17,872
Pass [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	108,065	71,240
Pass [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans	4,742	5,310
Special Mention [Member]
Non-covered loans	68,287	22,152
Covered loans	2,630	5,634
Total loans	70,917	27,786
Special Mention [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	2,079	661
Covered loans	28	35
Special Mention [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	4,327	2,166
Special Mention [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	2,468	1,087
Special Mention [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	7,489	4,395
Covered loans
Special Mention [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	27,160	8,166
Covered loans
Special Mention [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	122	131
Special Mention [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	4,107	538
Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	2,014	649
Covered loans	2,327	5,244
Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	17,001	4,355
Covered loans	275	355
Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	179
Special Mention [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	1,341	4
Special Mention [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans
Substandard [Member]
Non-covered loans	55,556	45,129
Covered loans	744	940
Total loans	56,300	46,069
Substandard [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans	799	970
Covered loans
Substandard [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans	2,984	653
Substandard [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans	1,327	1,742
Substandard [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans	5,776	4,259
Covered loans		15
Substandard [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans	16,620	9,906
Covered loans	3	6
Substandard [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans	335	86
Substandard [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans	1,439	1,469
Substandard [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans	1,818	1,623
Covered loans	349	529
Substandard [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans	23,116	23,814
Covered loans	392	390
Substandard [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans	721	299
Substandard [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans	621	308
Substandard [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans
Doubtful [Member]
Non-covered loans		146
Covered loans
Total loans		146
Doubtful [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans
Covered loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans
Covered loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans		146
Covered loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans
Doubtful [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans
Covered loans
Doubtful [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans
Covered loans
Doubtful [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans
Doubtful [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans
Doubtful [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans
Unlikely to be Collected Financing Receivable [Member]
Non-covered loans
Covered loans
Total loans
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]
Non-covered loans
Covered loans
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Non-covered loans
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Multi-family Residential [Member]
Non-covered loans
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]
Non-covered loans
Covered loans
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]
Non-covered loans
Covered loans
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Agricultural [Member]
Non-covered loans
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member] | Farmland [Member]
Non-covered loans
Unlikely to be Collected Financing Receivable [Member] | Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]
Non-covered loans
Covered loans
Unlikely to be Collected Financing Receivable [Member] | Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]
Non-covered loans
Covered loans
Unlikely to be Collected Financing Receivable [Member] | Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]
Non-covered loans
Unlikely to be Collected Financing Receivable [Member] | Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]
Non-covered loans
Unlikely to be Collected Financing Receivable [Member] | Consumer and Other Portfolio Segment [Member] | Other Loan [Member]
Non-covered loans