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Note 4 - Credit Quality - Aging of Past Due Loans by Loan Class (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Non-covered $ 2,382,699 $ 2,416,089
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered   0
Amortized Cost of > 90 Days Accruing No Allowance, Total 0  
Financial Asset, 30 to 59 Days Past Due [Member]    
Non-covered 11,848 15,091
Financial Asset, 60 to 89 Days Past Due [Member]    
Non-covered 5,642 5,964
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Non-covered 8,599 10,111
Financial Asset, Past Due [Member]    
Non-covered 26,089 31,166
Financial Asset, Not Past Due [Member]    
Non-covered 2,356,610 2,384,923
Commercial Portfolio Segment [Member]    
Non-covered 1,568,650 1,581,492
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]    
Non-covered 70,205 72,319
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 275 40
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 2,424
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 1,168 143
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 1,443 2,607
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 68,762 69,712
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]    
Non-covered 246,602 232,854
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 808 1,100
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 696 295
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 1,922 2,285
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 3,426 3,680
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 243,176 229,174
Commercial Portfolio Segment [Member] | Multi-family Residential [Member]    
Non-covered 192,193 199,521
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Commercial Portfolio Segment [Member] | Multi-family Residential [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 103 0
Commercial Portfolio Segment [Member] | Multi-family Residential [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Commercial Portfolio Segment [Member] | Multi-family Residential [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Commercial Portfolio Segment [Member] | Multi-family Residential [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 103 0
Commercial Portfolio Segment [Member] | Multi-family Residential [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 192,090 199,521
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]    
Non-covered 191,531 195,588
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 905 1,228
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 1,001 434
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 674 500
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 2,580 2,162
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 188,951 193,426
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]    
Non-covered 840,746 852,223
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 2,009 3,182
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 366 123
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 1,788 1,457
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 4,163 4,762
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 836,583 847,461
Commercial Portfolio Segment [Member] | Agricultural [Member]    
Non-covered 15,579 16,676
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Commercial Portfolio Segment [Member] | Agricultural [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 83 159
Commercial Portfolio Segment [Member] | Agricultural [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 1 67
Commercial Portfolio Segment [Member] | Agricultural [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 304 492
Commercial Portfolio Segment [Member] | Agricultural [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 388 718
Commercial Portfolio Segment [Member] | Agricultural [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 15,191 15,958
Commercial Portfolio Segment [Member] | Farmland [Member]    
Non-covered 11,794 12,311
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Commercial Portfolio Segment [Member] | Farmland [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 302 11
Commercial Portfolio Segment [Member] | Farmland [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 1 2
Commercial Portfolio Segment [Member] | Farmland [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 142 142
Commercial Portfolio Segment [Member] | Farmland [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 445 155
Commercial Portfolio Segment [Member] | Farmland [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 11,349 12,156
Consumer Real Estate Portfolio Segment [Member]    
Non-covered 732,530 745,024
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]    
Non-covered 87,988 90,227
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 213 599
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 239 230
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 466 558
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 918 1,387
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 87,070 88,840
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]    
Non-covered 640,669 650,306
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 4,807 5,812
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 2,574 1,457
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 1,667 3,974
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 9,048 11,243
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 631,621 639,063
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]    
Non-covered 3,873 4,491
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 3,873 4,491
Consumer and Other Portfolio Segment [Member]    
Non-covered 81,519 89,573
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]    
Non-covered 79,503 87,758
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 2,343 2,960
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 764 932
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 468 560
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 3,575 4,452
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered 75,928 83,306
Consumer and Other Portfolio Segment [Member] | Other Loan [Member]    
Non-covered 2,016 1,815
Amortized Cost of > 90 Days Accruing No Allowance, Non-covered 0 0
Consumer and Other Portfolio Segment [Member] | Other Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Consumer and Other Portfolio Segment [Member] | Other Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Consumer and Other Portfolio Segment [Member] | Other Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Consumer and Other Portfolio Segment [Member] | Other Loan [Member] | Financial Asset, Past Due [Member] | Non-covered Loans [Member]    
Non-covered 0 0
Consumer and Other Portfolio Segment [Member] | Other Loan [Member] | Financial Asset, Not Past Due [Member] | Non-covered Loans [Member]    
Non-covered $ 2,016 $ 1,815