Quarterly report [Sections 13 or 15(d)]

Note 5 - Loans - Loans Categorized by Past Due Status (Details)

v3.26.3
Note 5 - Loans - Loans Categorized by Past Due Status (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Commercial, financial and agricultural $ 14,737,303 $ 13,696,912
Non-accrual 160,084 168,351
Nonaccrual With No ACL 123,969 155,413
Financial Asset, 30 to 59 Days Past Due [Member]    
Commercial, financial and agricultural 3,634 10,968
Financial Asset, 60 to 89 Days Past Due [Member]    
Commercial, financial and agricultural 17,945 7,886
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Commercial, financial and agricultural 1,514 478
Financial Asset, Past Due [Member]    
Commercial, financial and agricultural 23,093 19,332
Financial Asset, Not Past Due [Member]    
Commercial, financial and agricultural 14,554,126 13,509,229
Commercial Real Estate Portfolio Segment [Member]    
Commercial, financial and agricultural 3,386,275 3,146,736
Non-accrual 20,416 26,756
Nonaccrual With No ACL 11,742 19,724
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]    
Commercial, financial and agricultural 1,571 1,001
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]    
Commercial, financial and agricultural 4,900 1,533
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Commercial, financial and agricultural 58 101
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member]    
Commercial, financial and agricultural 6,529 2,635
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]    
Commercial, financial and agricultural 3,359,330 3,117,345
Real Estate Portfolio Segment[Member]    
Commercial, financial and agricultural 9,711,991 9,014,925
Non-accrual 101,284  
Nonaccrual With No ACL 89,266  
Real Estate Portfolio Segment[Member] | Construction Loans [Member]    
Commercial, financial and agricultural 1,566,203 1,457,628
Non-accrual 37,742 35,885
Nonaccrual With No ACL 22,961 35,173
Real Estate Portfolio Segment[Member] | Owner Occupied Commercial [Member]    
Commercial, financial and agricultural 2,853,062 2,739,823
Non-accrual 20,250 13,578
Nonaccrual With No ACL 20,150 13,578
Real Estate Portfolio Segment[Member] | One to Four Family [Member]    
Commercial, financial and agricultural 1,717,781 1,671,713
Non-accrual 6,273 9,440
Nonaccrual With No ACL 5,965 8,993
Real Estate Portfolio Segment[Member] | Non-owner Occupied Commercial [Member]    
Commercial, financial and agricultural 5,141,148 4,603,389
Non-accrual 74,761 81,977
Nonaccrual With No ACL 63,151 77,930
Real Estate Portfolio Segment[Member] | Other Mortgages [Member]    
Commercial, financial and agricultural   9,014,925
Non-accrual   104,995
Nonaccrual With No ACL   100,501
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member]    
Commercial, financial and agricultural 2,027  
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]    
Commercial, financial and agricultural 0 0
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied Commercial [Member]    
Commercial, financial and agricultural 1,864 5,815
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | One to Four Family [Member]    
Commercial, financial and agricultural 163 998
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Non-owner Occupied Commercial [Member]    
Commercial, financial and agricultural 0 2,663
Real Estate Portfolio Segment[Member] | Financial Asset, 30 to 59 Days Past Due [Member] | Other Mortgages [Member]    
Commercial, financial and agricultural   9,476
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member]    
Commercial, financial and agricultural 4,199  
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]    
Commercial, financial and agricultural 8,790 1,148
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied Commercial [Member]    
Commercial, financial and agricultural 0 295
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | One to Four Family [Member]    
Commercial, financial and agricultural 4,199 4,770
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Non-owner Occupied Commercial [Member]    
Commercial, financial and agricultural 0 0
Real Estate Portfolio Segment[Member] | Financial Asset, 60 to 89 Days Past Due [Member] | Other Mortgages [Member]    
Commercial, financial and agricultural   5,065
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Commercial, financial and agricultural 1,425  
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]    
Commercial, financial and agricultural 0 0
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied Commercial [Member]    
Commercial, financial and agricultural 0 0
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | One to Four Family [Member]    
Commercial, financial and agricultural 1,425 323
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non-owner Occupied Commercial [Member]    
Commercial, financial and agricultural 0 0
Real Estate Portfolio Segment[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Mortgages [Member]    
Commercial, financial and agricultural   323
Real Estate Portfolio Segment[Member] | Financial Asset, Past Due [Member]    
Commercial, financial and agricultural 7,651  
Real Estate Portfolio Segment[Member] | Financial Asset, Past Due [Member] | Construction Loans [Member]    
Commercial, financial and agricultural 8,790 1,148
Real Estate Portfolio Segment[Member] | Financial Asset, Past Due [Member] | Owner Occupied Commercial [Member]    
Commercial, financial and agricultural 1,864 6,110
Real Estate Portfolio Segment[Member] | Financial Asset, Past Due [Member] | One to Four Family [Member]    
Commercial, financial and agricultural 5,787 6,091
Real Estate Portfolio Segment[Member] | Financial Asset, Past Due [Member] | Non-owner Occupied Commercial [Member]    
Commercial, financial and agricultural 0 2,663
Real Estate Portfolio Segment[Member] | Financial Asset, Past Due [Member] | Other Mortgages [Member]    
Commercial, financial and agricultural   14,864
Real Estate Portfolio Segment[Member] | Financial Asset, Not Past Due [Member]    
Commercial, financial and agricultural 9,603,056  
Real Estate Portfolio Segment[Member] | Financial Asset, Not Past Due [Member] | Construction Loans [Member]    
Commercial, financial and agricultural 1,519,671 1,420,595
Real Estate Portfolio Segment[Member] | Financial Asset, Not Past Due [Member] | Owner Occupied Commercial [Member]    
Commercial, financial and agricultural 2,830,948 2,720,135
Real Estate Portfolio Segment[Member] | Financial Asset, Not Past Due [Member] | One to Four Family [Member]    
Commercial, financial and agricultural 1,705,721 1,656,182
Real Estate Portfolio Segment[Member] | Financial Asset, Not Past Due [Member] | Non-owner Occupied Commercial [Member]    
Commercial, financial and agricultural 5,066,387 4,518,749
Real Estate Portfolio Segment[Member] | Financial Asset, Not Past Due [Member] | Other Mortgages [Member]    
Commercial, financial and agricultural   8,895,066
Consumer Portfolio Segment [Member]    
Commercial, financial and agricultural 72,834 77,623
Non-accrual 642 715
Nonaccrual With No ACL 0 15
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]    
Commercial, financial and agricultural 36 491
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]    
Commercial, financial and agricultural 56 140
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]    
Commercial, financial and agricultural 31 54
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]    
Commercial, financial and agricultural 123 685
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]    
Commercial, financial and agricultural $ 72,069 $ 76,223