Loans and Leases and the Allowance for Credit Losses - Schedule of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	$ 13,965,026	$ 13,646,420
Commercial
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	5,777,486	5,464,503
Commercial | Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	1,652,699	1,389,066
Commercial | Paycheck Protection Program
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	11,369	19,579
Commercial | Commercial Mortgage
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	3,749,016	3,725,542
Commercial | Construction
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	304,463	260,825
Commercial | Lease Financing
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	59,939	69,491
Consumer
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	8,187,540	8,181,917
Consumer | Residential Mortgage
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	4,684,171	4,653,072
Consumer | Home Equity
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	2,264,827	2,225,950
Consumer | Automobile
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	837,830	870,396
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	$ 400,712	$ 432,499