v3.26.3
LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Amortized Cost Basis of Loans with Modifications (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income $ 51,148,063   $ 51,148,063   $ 48,764,162
Modified in Period     $ 196,862 $ 234,109  
Total Class of Loans 0.30% 0.20% 0.40% 0.50%  
Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income $ 268,871   $ 268,871   351,132
Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 175,728   175,728   135,335
Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 8,754   8,754   8,358
Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 7,294   7,294   11,797
Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 966   966   2,074
Term Extension          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 112,205 $ 68,546 169,114 $ 225,733  
Payment Delay          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 27,748 0 27,748 0  
Interest Rate Reduction          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 0 $ 8,376 0 8,376  
Commercial          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income $ 16,260,724   16,260,724   14,983,861
Modified in Period     $ 91,499 $ 71,411  
Total Class of Loans 0.50% 0.10% 0.60% 0.50%  
Commercial | Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income $ 12,651   $ 12,651   17,098
Commercial | Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 175,557   175,557   131,107
Commercial | Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 8,473   8,473   6,851
Commercial | Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 1,556   1,556   5,411
Commercial | Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 821   821   1,942
Commercial | Term Extension          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 65,847 $ 0 83,581 $ 63,035  
Commercial | Payment Delay          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 7,918 0 7,918 0  
Commercial | Interest Rate Reduction          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 0 $ 8,376 0 8,376  
Commercial real estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income $ 22,692,502   22,692,502   22,050,007
Modified in Period     $ 105,363 $ 162,698  
Total Class of Loans 0.30% 0.30% 0.50% 0.70%  
Commercial real estate | Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income $ 146,340   $ 146,340   237,984
Commercial real estate | Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 167   167   3,381
Commercial real estate | Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 281   281   1,238
Commercial real estate | Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Commercial real estate | Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 106   106   116
Commercial real estate | Term Extension          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 46,358 $ 68,546 85,533 $ 162,698  
Commercial real estate | Payment Delay          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 19,830 0 19,830 0  
Commercial real estate | Interest Rate Reduction          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified in Period 0 $ 0 0 $ 0  
Residential real estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 8,770,515   8,770,515   8,467,496
Residential real estate | Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 87,932   87,932   73,806
Residential real estate | Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Residential real estate | Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Residential real estate | Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Residential real estate | Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Indirect | Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Indirect | Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Indirect | Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Indirect | Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 5,738   5,738   5,802
Indirect | Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Home equity | Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 21,948   21,948   17,204
Home equity | Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Home equity | Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Home equity | Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Home equity | Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0   0
Other consumer | Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0    
Other consumer | Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 4   4    
Other consumer | Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0    
Other consumer | Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income 0   0    
Other consumer | Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income $ 39   $ 39    
BBCC | Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         1,364
BBCC | Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         832
BBCC | Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         269
BBCC | Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         260
BBCC | Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         0
Direct | Real Estate          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         3,676
Direct | Blanket Lien          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         15
Direct | Investment Securities/Cash          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         0
Direct | Auto          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         324
Direct | Other          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans, net of unearned income         $ 16