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Home Equity Investments (HEI) - Schedule of Home Equity Investments (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) transaction | Dec. 31, 2023 USD ($) transaction | Sep. 30, 2021 transaction | Dec. 31, 2023 USD ($) transaction | Dec. 31, 2021 transaction
Equity Method Investments and Joint Ventures [Abstract] |  |  |  |  |  |
Number of securitization transactions co-sponsored | transaction |  | 2 | 2 | 2 | 2 | 2
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Home equity investments | [1] | $ 560,745 | $ 550,436 |  | $ 550,436 |
Redwood |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Home equity investments |  | 246,561 | 244,719 |  | 244,719 |
HEI held at consolidated HEI securitization entities |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Home equity investments |  | $ 314,184 | $ 305,717 |  | $ 305,717 |
[1] | Our consolidated balance sheets include assets of consolidated variable interest entities (“VIEs”) that can only be used to settle obligations of these VIEs and liabilities of consolidated VIEs for which creditors do not have recourse to Redwood Trust, Inc. or its affiliates. At March 31, 2024 and December 31, 2023, assets of consolidated VIEs totaled $11,850,461 and $10,988,885, respectively. At March 31, 2024 and December 31, 2023, liabilities of consolidated VIEs totaled $10,921,862 and $10,096,308, respectively. See Note 4 for further discussion.

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