Note 7 - Loans and the Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Loans	$ 4,606,176	$ 3,189,608
Pass [Member]
Loans	4,523,041	3,105,872
Special Mention [Member]
Loans	48,976	47,430
Substandard [Member]
Loans	27,924	17,803
Doubtful [Member]
Loans	6,235	18,503
Commercial Real Estate Portfolio Segment [Member] | Construction and Land [Member]
Loans	722,074	548,528
Commercial Real Estate Portfolio Segment [Member] | Construction and Land [Member] | Pass [Member]
Loans	716,071	545,071
Commercial Real Estate Portfolio Segment [Member] | Construction and Land [Member] | Special Mention [Member]
Loans	3,496	266
Commercial Real Estate Portfolio Segment [Member] | Construction and Land [Member] | Substandard [Member]
Loans	2,157	1,850
Commercial Real Estate Portfolio Segment [Member] | Construction and Land [Member] | Doubtful [Member]
Loans	350	1,341
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member]
Loans	193,587	87,463
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member] | Pass [Member]
Loans	191,475	86,063
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member] | Special Mention [Member]
Loans	2,082	1,324
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member] | Substandard [Member]
Loans	16	0
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member] | Doubtful [Member]
Loans	14	76
Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member]
Loans	1,826,819	1,144,426
Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member] | Pass [Member]
Loans	1,781,136	1,094,782
Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member] | Special Mention [Member]
Loans	32,972	34,495
Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member] | Substandard [Member]
Loans	10,462	9,735
Commercial Real Estate Portfolio Segment [Member] | Nonfarm Nonresidential [Member] | Doubtful [Member]
Loans	2,249	5,414
Residential Portfolio Segment [Member] | Real Estate Residential One- to Four-Family [Member]
Loans	557,741	467,699
Residential Portfolio Segment [Member] | Real Estate Residential One- to Four-Family [Member] | Pass [Member]
Loans	545,142	456,150
Residential Portfolio Segment [Member] | Real Estate Residential One- to Four-Family [Member] | Special Mention [Member]
Loans	3,780	3,109
Residential Portfolio Segment [Member] | Real Estate Residential One- to Four-Family [Member] | Substandard [Member]
Loans	7,909	2,801
Residential Portfolio Segment [Member] | Real Estate Residential One- to Four-Family [Member] | Doubtful [Member]
Loans	910	5,639
Residential Portfolio Segment [Member] | Multi-family Residential [Member]
Loans	98,637	97,508
Residential Portfolio Segment [Member] | Multi-family Residential [Member] | Pass [Member]
Loans	98,621	97,485
Residential Portfolio Segment [Member] | Multi-family Residential [Member] | Special Mention [Member]
Loans	0	0
Residential Portfolio Segment [Member] | Multi-family Residential [Member] | Substandard [Member]
Loans	16	23
Residential Portfolio Segment [Member] | Multi-family Residential [Member] | Doubtful [Member]
Loans	0	0
Commercial Portfolio Segment [Member]
Loans	1,090,343	721,385
Commercial Portfolio Segment [Member] | Pass [Member]
Loans	1,074,417	704,755
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans	6,520	7,886
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans	6,761	3,137
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans	2,645	5,607
Consumer Portfolio Segment [Member]
Loans	116,975	122,599
Consumer Portfolio Segment [Member] | Pass [Member]
Loans	116,179	121,566
Consumer Portfolio Segment [Member] | Special Mention [Member]
Loans	126	350
Consumer Portfolio Segment [Member] | Substandard [Member]
Loans	603	257
Consumer Portfolio Segment [Member] | Doubtful [Member]
Loans	$ 67	$ 426