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Loans and Leases and the Allowance for Credit Losses - Schedule of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | $ 13,918,583 | $ 13,965,026
Commercial |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 5,930,074 | 5,777,486
Commercial | Commercial Mortgage |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 3,868,566 | 3,749,016
Commercial | Commercial and Industrial |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 1,675,347 | 1,652,699
Commercial | Construction |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 319,150 | 304,463
Commercial | Lease Financing |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 60,665 | 59,939
Commercial | Paycheck Protection Program |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 6,346 | 11,369
Consumer |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 7,988,509 | 8,187,540
Consumer | Residential Mortgage |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 4,622,677 | 4,684,171
Consumer | Home Equity |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 2,195,844 | 2,264,827
Consumer | Automobile |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | 786,910 | 837,830
Consumer | Other |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans and Leases | $ 383,078 | $ 400,712

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