Loans and Leases - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unamortized deferred loan origination fees and costs	$ (237,600,000)	$ (19,600,000)
Increase in unamortized deferred loan origination costs	218,000,000
Total Loans and Leases	18,029,552,000	9,779,288,000
FRB borrowings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	0	0
Asset Pledged as Collateral with Right
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases	6,300,000,000	3,600,000,000
Directors, executive officers and their affiliates
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded commitments on extensions of credit	15,000	5,600,000
Loans And Leases Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest on loans and leases	$ 77,800,000	$ 37,500,000