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Home Equity Investments (HEI) - Schedule of Activity of HEI (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Fair value of HEI purchased and originated (1) |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net market valuation gains (losses) |  | $ 0 | $ 0
Fair value of HEI purchased and originated (1) | Redwood |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net market valuation gains (losses) |  | 136,445 | 248,218
Fair value of HEI transferred |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net market valuation gains (losses) | $ 111,000 | 173,207 | 0
Fair value of HEI transferred | Redwood |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net market valuation gains (losses) |  | $ (173,207) | $ 0

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