v3.26.3
LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Types of Collateral (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income $ 51,148,063 $ 48,764,162
Real Estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 268,871 351,132
Blanket Lien    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 175,728 135,335
Investment Securities/Cash    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 8,754 8,358
Auto    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 7,294 11,797
Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 966 2,074
Commercial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 16,260,724 14,983,861
Commercial | Real Estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 12,651 17,098
Commercial | Blanket Lien    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 175,557 131,107
Commercial | Investment Securities/Cash    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 8,473 6,851
Commercial | Auto    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 1,556 5,411
Commercial | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 821 1,942
Commercial real estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 22,692,502 22,050,007
Commercial real estate | Real Estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 146,340 237,984
Commercial real estate | Blanket Lien    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 167 3,381
Commercial real estate | Investment Securities/Cash    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 281 1,238
Commercial real estate | Auto    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Commercial real estate | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 106 116
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
Residential real estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 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 73,806
Residential real estate | Blanket Lien    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Residential real estate | Investment Securities/Cash    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Residential real estate | Auto    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Residential real estate | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Indirect | Real Estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Indirect | Blanket Lien    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Indirect | Investment Securities/Cash    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Indirect | Auto    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 5,738 5,802
Indirect | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 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
Home equity | Real Estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 21,948 17,204
Home equity | Blanket Lien    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Home equity | Investment Securities/Cash    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Home equity | Auto    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 0
Home equity | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0 $ 0
Other consumer | Real Estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0  
Other consumer | Blanket Lien    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 4  
Other consumer | Investment Securities/Cash    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0  
Other consumer | Auto    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income 0  
Other consumer | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans, net of unearned income $ 39