Loans and Leases - Schedule of Loans and Leases by Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 57,868,678	$ 56,597,110
Commercial portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	46,532,049	45,230,196
Commercial portfolio \| Commercial non-mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	21,497,447	20,405,237
Commercial portfolio \| Asset-based
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	1,036,823	1,231,231
Commercial portfolio \| Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	15,345,465	15,326,007
Commercial portfolio \| Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	7,447,623	7,008,839
Commercial portfolio \| Equipment financing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	1,204,691	1,258,882
Consumer portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	11,336,629	11,366,914
Consumer portfolio \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	9,600,445	9,599,577
Consumer portfolio \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	1,341,382	1,370,513
Consumer portfolio \| Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases	$ 394,802	$ 396,824