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REVERSE MORTGAGE LOANS HELD FOR INVESTMENT AND HMBS-RELATED BORROWINGS - Schedule of Significant Unobservable Inputs Used to Value the Reverse Mortgage Loans Held for Investment and HMBS-related Borrowings (Details) | Jun. 30, 2024 yr | Dec. 31, 2023 $ / shares yr
--- | --- | ---
Discount rate |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Measurement input | 0.120 | 0.120
Minimum | Life in years |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Measurement input | 0.1 | 0.1
Minimum | Conditional prepayment rate including voluntary and involuntary prepayments |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Measurement input | 0.065 | 0.069
Maximum | Life in years |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Measurement input | 9.1 | 8.9
Maximum | Conditional prepayment rate including voluntary and involuntary prepayments |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Measurement input | 0.199 | 0.113
Weighted Average | Life in years |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Measurement input | 6.9 | 7.2
Weighted Average | Conditional prepayment rate including voluntary and involuntary prepayments |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Measurement input | 0.080 | 0.081

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