Note 4 - Loans and Allowance for Credit Losses - Aging of Recorded Investment (Details) - USD ($) $ in Thousands		Jun. 30, 2024	Dec. 31, 2023
Loans, gross	[1]	$ 3,047,712	$ 3,031,861
Non-accrual Loans	[1]	54,589	31,619
Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[2]	1,190,207	1,167,857
Non-accrual Loans		17,617	10,569
Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	202,459	181,469
Non-accrual Loans	[1]	10,000	0
Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	1,190,207	1,167,857
Non-accrual Loans	[1]	17,617	10,569
Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	1,467,802	1,487,796
Non-accrual Loans	[1]	19,623	18,103
Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	126,649	130,096
Non-accrual Loans	[1]	6,472	854
Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	50,323	52,074
Non-accrual Loans	[1]	870	2,085
Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	10,272	12,569
Non-accrual Loans	[1]	7	8
Financial Asset, 30 to 59 Days Past Due [Member]
Loans, gross		11,818	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		731	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		9,599	9,050
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross		327	1,544
Financial Asset, 30 to 59 Days Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross		1,128	356
Financial Asset, 30 to 59 Days Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross		33	160
Financial Asset, 60 to 89 Days Past Due [Member]
Loans, gross		9,631	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		8,367	216
Financial Asset, 60 to 89 Days Past Due [Member] | Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		1,231	5,795
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross		1	0
Financial Asset, 60 to 89 Days Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross		0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross		32	20
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans, gross		42,104	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		10,000	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		8,838	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		16,444	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		7	8
Financial Asset, Past Due [Member]
Loans, gross	[1]	63,553	38,145
Financial Asset, Past Due [Member] | Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	10,000	0
Financial Asset, Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	17,936	3,139
Financial Asset, Past Due [Member] | Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross	[1]	27,274	29,979
Financial Asset, Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	6,676	2,398
Financial Asset, Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	1,595	2,441
Financial Asset, Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross	[1]	72	188
Financial Asset, Not Past Due [Member]
Loans, gross		2,984,159	2,993,716
Financial Asset, Not Past Due [Member] | Construction And Land Development Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		192,459	181,469
Financial Asset, Not Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		1,172,271	1,164,718
Financial Asset, Not Past Due [Member] | Single Family Residential Mortgages Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, gross		1,440,528	1,457,817
Financial Asset, Not Past Due [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]
Loans, gross		119,973	127,698
Financial Asset, Not Past Due [Member] | Small Business Administration Agency Securities [Member] | Commercial Portfolio Segment [Member]
Loans, gross		48,728	49,633
Financial Asset, Not Past Due [Member] | Other Loans [Member] | Commercial Portfolio Segment [Member]
Loans, gross		$ 10,200	$ 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 1-4 residential loans for a business purpose.