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Asset-Backed Securities Issued - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2052 | Mar. 31, 2029 | Jul. 31, 2023 | Sep. 30, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Other assets | [1] |  | $ 231,117,000 |  |  |  |  | $ 130,588,000
VIE, ownership interest rate (as a percent) |  |  | 80.00% |  |  |  |  |
Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Other assets |  |  | $ 41,826,000 |  |  |  |  | 9,937,000
Variable Interest Entity, Primary Beneficiary | Point HEI |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amortized cost |  |  |  |  |  |  | $ 146,000,000 |
CoreVest | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amortized cost |  |  |  |  |  |  | $ 270,000,000 |
Freddie Mac SLST(1) | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amortized cost |  | $ 210,000,000 |  |  |  |  |  |
Other assets |  |  | 2,028,000 |  |  |  |  | 646,000
Asset-backed Securities | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | 143,000,000 |  |  |  |  |
Debt discount |  |  | $ 2,000,000 |  |  |  |  |
Debt instrument, interest rate (as a percent) |  |  | 4.75% |  |  |  |  |
VIE, ownership interest rate (as a percent) |  | 100.00% |  |  |  |  |  |
Asset-backed Securities | Variable Interest Entity, Primary Beneficiary | Forecast |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, interest rate (as a percent) |  |  |  | 2.00% | 2.00% | 7.75% |  |
Asset-backed Securities | CoreVest |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 270,000,000 |  |  |  |  |
Bridge loan |  |  | 278,000,000 |  |  |  |  |
Other assets |  |  | 13,000,000 |  |  |  |  |
Restricted cash |  |  | 15,000,000 |  |  |  |  |
Securitized asset backed securities, borrowing capacity |  |  | 300,000,000 |  |  |  |  |
Asset-backed Securities | CoreVest | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | 267,000,000 |  |  |  |  |
Debt discount |  |  | $ 3,000,000 |  |  |  |  |
Debt instrument, interest rate (as a percent) |  |  | 2.34% |  |  |  |  |
Asset-backed Securities | Freddie Mac SLST(1) |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  | $ 145,000,000 |  |  |  |  | $ 205,000,000
Contractual maturities of over five years | Asset-backed Securities |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Contractual maturities of ABS (in years) |  |  | 5 years |  |  |  |  |
[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 December 31, 2021 and 2020, assets of consolidated VIEs totaled $10,661,081 and $8,141,069, respectively. At December 31, 2021 and 2020, liabilities of consolidated VIEs totaled $9,619,347 and $7,148,414, respectively. See Note 4 for further discussion.

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