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Asset-Backed Securities Issued - Additional Information (Details) - USD ($) | 3 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2024 | Dec. 31, 2053 | Dec. 31, 2052 | Dec. 31, 2030 | May 29, 2029 | Mar. 31, 2029 | Dec. 31, 2023 | Mar. 31, 2023 | Jun. 30, 2022 | Sep. 30, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash |  | $ 64,993,000 | [1] |  |  |  |  |  | $ 75,684,000 | [1] | $ 86,000,000 |  |
Other assets | [1] | $ 333,631,000 |  |  |  |  |  |  | 351,109,000 |  |  |  |
Asset-backed securities issued | Maturity over Five Years |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual maturities of ABS (in years) |  | 5 years |  |  |  |  |  |  |  |  |  |  |
CoreVest | Asset-backed securities issued |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 478,000,000 |  |  |  |  |  |  | 485,000,000 |  |  |  |
Bridge loan |  | 304,000,000 |  |  |  |  |  |  |  |  |  |  |
Restricted cash |  | 8,000,000 |  |  |  |  |  |  |  |  |  |  |
Other assets |  | 8,000,000 |  |  |  |  |  |  |  |  |  |  |
CoreVest | 2021 Asset Backed Securities Sold |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | 263,000,000 |  |  |  |  |  |  |  |  |  |  |
Total funding capacity |  | 300,000,000 |  |  |  |  |  |  |  |  |  |  |
Repurchased debt instrument, face amount |  | 7,000,000 |  |  |  |  |  |  |  |  |  |  |
Gain on extinguishment of debt |  | 300,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Period One | CoreVest | 2022 Asset Backed Securities Sold |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | 231,000,000 |  |  |  |  |  |  |  |  |  |  |
Bridge loan |  | 230,000,000 |  |  |  |  |  |  |  |  |  |  |
Restricted cash |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |
Other assets |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Period One | CoreVest | Asset-backed securities issued |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total funding capacity |  | 250,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Period Two | CoreVest | 2022 Asset Backed Securities Sold |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | 215,000,000 |  |  |  |  |  |  |  |  |  |  |
Bridge loan |  | 228,000,000 |  |  |  |  |  |  |  |  |  |  |
Restricted cash |  | 18,000,000 |  |  |  |  |  |  |  |  |  |  |
Other assets |  | 7,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption, Period Two | CoreVest | Asset-backed securities issued |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total funding capacity |  | 250,000,000 |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | HEI |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
ABS issued, at amortized cost |  |  |  |  |  |  |  |  |  |  |  |  | $ 146,000,000
Variable Interest Entity, Primary Beneficiary | Asset-backed securities issued | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument interest rate (as a percent) |  |  |  |  | 2.00% |  |  | 2.00% |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | CoreVest | Asset-backed securities issued |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | 263,000,000 |  |  |  |  |  |  |  |  |  |  |
Unamortized debt discount |  | $ 0 |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | CoreVest | 2021 Asset Backed Securities Sold |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
ABS issued, at amortized cost |  |  |  |  |  |  |  |  |  |  |  |  | $ 270,000,000
Debt Instrument interest rate (as a percent) |  | 2.34% |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period One | 2021 Asset Backed Securities Sold | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument interest rate (as a percent) |  |  |  |  |  | 1.50% |  |  |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period One | CoreVest |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
ABS issued, at amortized cost |  |  |  |  |  |  |  |  | 231,000,000 |  |  |  |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period One | CoreVest | Asset-backed securities issued |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 232,000,000 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument interest rate (as a percent) |  | 7.89% |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period Two | 2021 Asset Backed Securities Sold | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument interest rate (as a percent) |  |  |  |  |  |  | 2.00% |  |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period Two | CoreVest |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
ABS issued, at amortized cost |  |  |  |  |  |  |  |  |  |  |  | $ 215,000,000 |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period Two | CoreVest | 2022 Asset Backed Securities Sold |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  | $ 214,000,000 |  |  |  |  |  |  |  |  |  |  |
Unamortized debt discount |  | $ 1,000,000 |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period Two | CoreVest | Asset-backed securities issued |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument interest rate (as a percent) |  | 4.32% |  |  |  |  |  |  |  |  |  |  |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period Four | HEI |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
ABS issued, at amortized cost |  |  |  |  |  |  |  |  | $ 139,000,000 |  |  |  |
Variable Interest Entity, Primary Beneficiary | Debt Instrument, Redemption, Period Four | Asset-backed securities issued | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument interest rate (as a percent) |  |  |  | 3.00% |  |  |  |  |  |  |  |  |
[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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