Note 4 - Loans and Allowance for Credit Losses - Aging of Recorded Investment (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Loans, gross	[1]	$ 3,091,896	$ 3,031,861
Non-accrual Loans	[1]	60,662	31,619
Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[2],[3]	1,252,682	1,167,857
Non-accrual Loans		20,430	10,569
Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	180,196	181,469
Non-accrual Loans	[1]	19,032	0
Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	1,252,682	1,167,857
Non-accrual Loans	[1]	20,430	10,569
Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	1,473,396	1,487,796
Non-accrual Loans	[1]	13,997	18,103
Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	128,861	130,096
Non-accrual Loans	[1]	6,464	854
Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	48,089	52,074
Non-accrual Loans	[1]	739	2,085
Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	8,672	12,569
Non-accrual Loans	[1]	0	8
Financial Asset, 30 to 59 Days Past Due [Member]
Loans, gross		11,427	12,451
Financial Asset, 30 to 59 Days Past Due [Member] | Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		1,119	1,341
Financial Asset, 30 to 59 Days Past Due [Member] | Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		9,111	9,050
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross		65	1,544
Financial Asset, 30 to 59 Days Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross		1,072	356
Financial Asset, 30 to 59 Days Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross		60	160
Financial Asset, 60 to 89 Days Past Due [Member]
Loans, gross		5,211	6,031
Financial Asset, 60 to 89 Days Past Due [Member] | Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		3,292	216
Financial Asset, 60 to 89 Days Past Due [Member] | Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		1,710	5,795
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross		117	0
Financial Asset, 60 to 89 Days Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross		81	0
Financial Asset, 60 to 89 Days Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross		11	20
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		53,121	19,663
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		19,032	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		16,916	1,582
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		10,358	15,134
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross		6,348	854
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross		467	2,085
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross		0	8
Financial Asset, Past Due [Member]
Loans, gross	[1]	69,759	38,145
Financial Asset, Past Due [Member] | Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	19,032	0
Financial Asset, Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	21,327	3,139
Financial Asset, Past Due [Member] | Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	21,179	29,979
Financial Asset, Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	6,530	2,398
Financial Asset, Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	1,620	2,441
Financial Asset, Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	71	188
Financial Asset, Not Past Due [Member]
Loans, gross		3,022,137	2,993,716
Financial Asset, Not Past Due [Member] | Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		161,164	181,469
Financial Asset, Not Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		1,231,355	1,164,718
Financial Asset, Not Past Due [Member] | Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		1,452,217	1,457,817
Financial Asset, Not Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross		122,331	127,698
Financial Asset, Not Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross		46,469	49,633
Financial Asset, Not Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross		$ 8,601	$ 12,381

[1] Past due loans include nonaccrual loans and are therefore included in total loans.

[2] Includes non-farm and non-residential real estate loans, multifamily residential and single-family residential loans for a business purpose.

[3] Net of discounts on acquired loans of $789 and $970 and net deferred fees of $1,256 and $1,512 as of September 30, 2024 and December 31, 2023.