v3.26.3
LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Past Due Loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income $ 51,148,063 $ 48,764,162
Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 51,148,063 48,764,162
Commercial    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 16,260,724 14,983,861
Commercial | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 16,260,724 14,763,451
Commercial real estate    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 22,692,502 22,050,007
Commercial real estate | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 22,692,502 21,874,337
BBCC | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   396,080
Residential    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 8,770,515 8,467,496
Residential | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 8,935,535 8,467,496
Indirect | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 1,288,306 1,075,235
Direct | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   649,297
Home equity | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 1,620,884 1,538,266
Other consumer | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 350,112  
Total Past Due | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 380,302 393,022
Total Past Due | Commercial | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 118,964 99,678
Total Past Due | Commercial real estate | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 107,357 151,802
Total Past Due | BBCC | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   3,119
Total Past Due | Residential | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 116,971 99,979
Total Past Due | Indirect | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 12,291 12,984
Total Past Due | Direct | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   7,011
Total Past Due | Home equity | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 19,927 18,449
Total Past Due | Other consumer | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 4,792  
30-59 Days Past Due | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 120,090 111,360
30-59 Days Past Due | Commercial | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 20,681 23,702
30-59 Days Past Due | Commercial real estate | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 26,421 20,870
30-59 Days Past Due | BBCC | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   1,297
30-59 Days Past Due | Residential | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 54,217 45,817
30-59 Days Past Due | Indirect | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 8,338 8,844
30-59 Days Past Due | Direct | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   3,644
30-59 Days Past Due | Home equity | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 9,245 7,186
30-59 Days Past Due | Other consumer | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 1,188  
60-89 Days Past Due | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 51,702 37,184
60-89 Days Past Due | Commercial | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 8,607 7,200
60-89 Days Past Due | Commercial real estate | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 17,843 8,151
60-89 Days Past Due | BBCC | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   1,359
60-89 Days Past Due | Residential | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 19,469 13,650
60-89 Days Past Due | Indirect | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 2,344 2,263
60-89 Days Past Due | Direct | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   1,605
60-89 Days Past Due | Home equity | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 2,630 2,956
60-89 Days Past Due | Other consumer | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 809  
Past Due 90 Days or More | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 208,510 244,478
Past Due 90 Days or More | Commercial | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 89,676 68,776
Past Due 90 Days or More | Commercial real estate | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 63,093 122,781
Past Due 90 Days or More | BBCC | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   463
Past Due 90 Days or More | Residential | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 43,285 40,512
Past Due 90 Days or More | Indirect | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 1,609 1,877
Past Due 90 Days or More | Direct | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   1,762
Past Due 90 Days or More | Home equity | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 8,052 8,307
Past Due 90 Days or More | Other consumer | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 2,795  
Current | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 50,767,761 48,371,140
Current | Commercial | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 16,141,760 14,663,773
Current | Commercial real estate | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 22,585,145 21,722,535
Current | BBCC | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   392,961
Current | Residential | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 8,818,564 8,367,517
Current | Indirect | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 1,276,015 1,062,251
Current | Direct | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income   642,286
Current | Home equity | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income 1,600,957 $ 1,519,817
Current | Other consumer | Portfolio Segment After Reclassifications    
Financing Receivable, Past Due [Line Items]    
Total loans, net of unearned income $ 345,320