Loans and Leases and the Allowance for Credit Losses - Schedule of Loan and Lease Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	$ 14,115,323	$ 14,075,980
Commercial
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	6,197,749	6,125,409
Commercial | Commercial Mortgage
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	4,038,287	4,020,622
Commercial | Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	1,703,290	1,705,133
Commercial | Construction
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	363,716	308,898
Commercial | Lease Financing
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	92,456	90,756
Consumer
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	7,917,574	7,950,571
Consumer | Residential Mortgage
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	4,630,876	4,628,283
Consumer | Home Equity
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	2,144,955	2,165,514
Consumer | Automobile
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	740,390	764,146
Consumer | Other
Accounts Notes And Loans Receivable [Line Items]
Loans and Leases	$ 401,353	$ 392,628