v3.26.1
Loans and Allowance for Credit Losses Past Due Loan Status and Non-Accrual Loans by Portfolio Segment (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]    
Total $ 25,934,293 $ 24,144,884
Non- accrual 146,457 153,872
Financial Asset, 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 98,099 98,869
Financial Asset, 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 20,144 36,001
Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 34,815 29,924
Current    
Financing Receivable, Past Due [Line Items]    
Total 25,634,778 23,826,218
Real estate - commercial mortgage    
Financing Receivable, Past Due [Line Items]    
Total 10,914,813 9,820,944
Non- accrual 63,939 72,050
Real estate - commercial mortgage | Financial Asset, 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 24,594 19,762
Real estate - commercial mortgage | Financial Asset, 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 4,588 17,757
Real estate - commercial mortgage | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 2,506 2,931
Real estate - commercial mortgage | Current    
Financing Receivable, Past Due [Line Items]    
Total 10,819,186 9,708,444
Commercial and Industrial    
Financing Receivable, Past Due [Line Items]    
Total 4,559,732 4,539,060
Non- accrual 39,368 44,103
Commercial and Industrial | Financial Asset, 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 6,157 5,023
Commercial and Industrial | Financial Asset, 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 3,950 4,563
Commercial and Industrial | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 98 3,653
Commercial and Industrial | Current    
Financing Receivable, Past Due [Line Items]    
Total 4,510,159 4,481,718
Real estate - residential mortgage    
Financing Receivable, Past Due [Line Items]    
Total 7,250,949 6,669,993
Non- accrual 33,475 27,751
Real estate - residential mortgage | Financial Asset, 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 48,760 48,246
Real estate - residential mortgage | Financial Asset, 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 6,294 7,912
Real estate - residential mortgage | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 23,346 17,818
Real estate - residential mortgage | Current    
Financing Receivable, Past Due [Line Items]    
Total 7,139,074 6,568,266
Real estate - home equity    
Financing Receivable, Past Due [Line Items]    
Total 1,336,068 1,242,831
Non- accrual 8,096 7,126
Real estate - home equity | Financial Asset, 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 8,475 15,646
Real estate - home equity | Financial Asset, 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 1,465 1,417
Real estate - home equity | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 3,577 3,958
Real estate - home equity | Current    
Financing Receivable, Past Due [Line Items]    
Total 1,314,455 1,214,684
Real estate - construction    
Financing Receivable, Past Due [Line Items]    
Total 946,654 970,298
Non- accrual 1,559 1,661
Real estate - construction | Financial Asset, 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 5,200 3,698
Real estate - construction | Financial Asset, 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 1,977 2,555
Real estate - construction | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 4,576 606
Real estate - construction | Current    
Financing Receivable, Past Due [Line Items]    
Total 933,342 961,778
Consumer    
Financing Receivable, Past Due [Line Items]    
Total 570,093 564,349
Non- accrual 2 3
Consumer | Financial Asset, 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 4,776 6,334
Consumer | Financial Asset, 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 1,574 1,604
Consumer | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 712 788
Consumer | Current    
Financing Receivable, Past Due [Line Items]    
Total 563,029 555,620
Leases and other loans    
Financing Receivable, Past Due [Line Items]    
Total 355,984 337,409
Non- accrual 18 1,178
Leases and other loans | Financial Asset, 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 137 160
Leases and other loans | Financial Asset, 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 296 193
Leases and other loans | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total 0 170
Leases and other loans | Current    
Financing Receivable, Past Due [Line Items]    
Total $ 355,533 $ 335,708