Loans and Leases and the Allowance for Credit Losses - Schedule of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	$ 14,002,178	$ 14,075,980
Commercial
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	6,104,126	6,125,409
Commercial | Commercial Mortgage
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	4,038,956	4,020,622
Commercial | Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	1,597,560	1,705,133
Commercial | Construction
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	374,768	308,898
Commercial | Lease Financing
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	92,842	90,756
Consumer
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	7,898,052	7,950,571
Consumer | Residential Mortgage
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	4,637,014	4,628,283
Consumer | Home Equity
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	2,139,025	2,165,514
Consumer | Automobile
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	715,688	764,146
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	$ 406,325	$ 392,628