Loan Portfolio - Schedule of Principal Balance Carrying Value of The Loans Receivable Held-for-investment (Parenthetical) (Details) - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
|
| Receivables [Abstract] | ||
| Specific CECL reserves | $ 515.6 | $ 365.4 |