Loans and Leases - Narrative (Details) - USD ($) |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Unamortized deferred loan origination costs | $ (228,700,000) | $ (237,600,000) |
| Total loans and leases | 17,924,156,000 | 18,029,552,000 |
| 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 | 6,100,000,000 | 6,300,000,000 |
| Loans and Leases Receivable | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accrued interest on loans and leases | $ 78,200,000 | $ 77,800,000 |