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Fair Value of Financial Instruments - Quantitative Information about Significant Unobservable Inputs Used in Valuation of Level 3 Assets and Liabilities Measured at Fair Value (Details) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) $ / loan securitization_entity | Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($)
Assets |  |  |  |  |  |
Other assets | [1] | $ 427,687 |  | $ 402,944 |  |
Total Assets |  | 18,427,426 | [1] | 14,504,327 | [1] | $ 13,021,138
Liabilities |  |  |  |  |  |
Total liabilities | [1] | $ 17,204,426 |  | 13,301,634 |  |
Securitization entity | securitization_entity |  | 2 |  |  |  |
VIEs |  |  |  |  |  |
Assets |  |  |  |  |  |
Total Assets |  | $ 14,312,672 |  | 10,988,885 |  |
Liabilities |  |  |  |  |  |
Total liabilities |  | 13,354,497 |  | 10,096,308 |  |
Collateralized Financing Entities | VIEs |  |  |  |  |  |
Assets |  |  |  |  |  |
Other assets |  | 37,054 |  | 24,443 |  |
Total Assets |  | 14,312,672 |  | 10,988,885 |  |
Liabilities |  |  |  |  |  |
Total liabilities |  | 13,354,497 |  | 10,096,308 |  |
HEI | Collateralized Financing Entities | VIEs |  |  |  |  |  |
Assets |  |  |  |  |  |
Other assets |  | 414 |  | 62 |  |
Total Assets |  | 341,220 |  | 316,600 |  |
Liabilities |  |  |  |  |  |
Total liabilities |  | 295,072 |  | 282,240 |  |
Fair value of securities owned |  | 46,000 |  |  |  |
Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Total Assets |  |  |  | 17,531,750 |  |
Liabilities |  |  |  |  |  |
Total liabilities |  | 12,648,727 |  |  |  |
ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued |  | 12,564,029 |  |  |  |
Other liabilities | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Other liabilities |  | $ 84,698 |  |  |  |
Minimum | Whole loan discount rate | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.04 |  |  |  |
Minimum | Prepayment rate (annual CPR) | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0 |  |  |  |
Minimum | Default rate | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0 |  |  |  |
Minimum | Loss severity | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0 |  |  |  |
Maximum | Whole loan discount rate | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.30 |  |  |  |
Maximum | Prepayment rate (annual CPR) | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.30 |  |  |  |
Maximum | Default rate | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.17 |  |  |  |
Maximum | Loss severity | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.50 |  |  |  |
Weighted Average | Whole loan discount rate | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.06 |  |  |  |
Weighted Average | Prepayment rate (annual CPR) | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.05 |  |  |  |
Weighted Average | Default rate | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.04 |  |  |  |
Weighted Average | Loss severity | ABS Issued | Level 3 |  |  |  |  |  |
Liabilities |  |  |  |  |  |
ABS issued, measurement input |  | 0.20 |  |  |  |
Residential consumer loans | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, fair value |  | $ 11,157,159 |  |  |  |
Residential consumer loans | Minimum | Senior credit spread to TBA price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 0.75 |  |  |  |
Residential consumer loans | Minimum | Senior credit spread to Swap rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 0.0170 |  |  |  |
Residential consumer loans | Minimum | Subordinate credit spread to Swap rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 0.0225 |  |  |  |
Residential consumer loans | Minimum | Senior credit support | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loan purchase commitments, measurement input |  | 0.07 |  |  |  |
Residential consumer loans | Minimum | IO discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input |  | 0.25 |  |  |  |
Residential consumer loans | Minimum | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 37 |  |  |  |
Residential consumer loans | Maximum | Senior credit spread to TBA price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 1.75 |  |  |  |
Residential consumer loans | Maximum | Senior credit spread to Swap rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 0.0200 |  |  |  |
Residential consumer loans | Maximum | Subordinate credit spread to Swap rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 0.0900 |  |  |  |
Residential consumer loans | Maximum | Senior credit support | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loan purchase commitments, measurement input |  | 0.10 |  |  |  |
Residential consumer loans | Maximum | IO discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input |  | 0.28 |  |  |  |
Residential consumer loans | Maximum | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 103 |  |  |  |
Residential consumer loans | Weighted Average | Senior credit spread to TBA price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 0.93 |  |  |  |
Residential consumer loans | Weighted Average | Senior credit spread to Swap rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 0.0190 |  |  |  |
Residential consumer loans | Weighted Average | Subordinate credit spread to Swap rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-sale, measurement input | $ / loan |  | 0.0341 |  |  |  |
Residential consumer loans | Weighted Average | Senior credit support | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loan purchase commitments, measurement input |  | 0.08 |  |  |  |
Residential consumer loans | Weighted Average | IO discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input |  | 0.27 |  |  |  |
Residential consumer loans | Weighted Average | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 95 |  |  |  |
Residential investor term loans | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, fair value |  | $ 2,836,370 |  |  |  |
Residential investor term loans | Minimum | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 92 |  |  |  |
Residential investor term loans | Minimum | Whole loan spread | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.0250 |  |  |  |
Residential investor term loans | Maximum | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 103 |  |  |  |
Residential investor term loans | Maximum | Whole loan spread | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.0260 |  |  |  |
Residential investor term loans | Weighted Average | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 95 |  |  |  |
Residential investor term loans | Weighted Average | Whole loan spread | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.0254 |  |  |  |
Residential investor bridge loans held-for-investment | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, fair value |  | $ 1,909,804 |  |  |  |
Residential investor bridge loans held-for-investment | Minimum | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 102 |  |  |  |
Residential investor bridge loans held-for-investment | Minimum | Whole loan spread | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.0435 |  |  |  |
Residential investor bridge loans held-for-investment | Minimum | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.05 |  |  |  |
Residential investor bridge loans held-for-investment | Minimum | Dollar price of non-performing loans | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input | $ / loan |  | 38 |  |  |  |
Residential investor bridge loans held-for-investment | Maximum | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 109 |  |  |  |
Residential investor bridge loans held-for-investment | Maximum | Whole loan spread | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.0435 |  |  |  |
Residential investor bridge loans held-for-investment | Maximum | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.18 |  |  |  |
Residential investor bridge loans held-for-investment | Maximum | Dollar price of non-performing loans | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input | $ / loan |  | 100 |  |  |  |
Residential investor bridge loans held-for-investment | Weighted Average | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 103 |  |  |  |
Residential investor bridge loans held-for-investment | Weighted Average | Whole loan spread | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.0435 |  |  |  |
Residential investor bridge loans held-for-investment | Weighted Average | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input |  | 0.09 |  |  |  |
Residential investor bridge loans held-for-investment | Weighted Average | Dollar price of non-performing loans | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans held-for-investment, measurement input | $ / loan |  | 88 |  |  |  |
Consolidated Agency multifamily loans | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, fair value |  | $ 425,648 |  |  |  |
Consolidated Agency multifamily loans | Minimum | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 98 |  |  |  |
Consolidated Agency multifamily loans | Maximum | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 98 |  |  |  |
Consolidated Agency multifamily loans | Weighted Average | Liability price | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loans receivable, measurement input | $ / loan |  | 98 |  |  |  |
Trading and AFS securities | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | $ 334,141 |  |  |  |
Trading and AFS securities | Minimum | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.05 |  |  |  |
Trading and AFS securities | Minimum | Prepayment rate (annual CPR) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0 |  |  |  |
Trading and AFS securities | Minimum | Default rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0 |  |  |  |
Trading and AFS securities | Minimum | Loss severity | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.25 |  |  |  |
Trading and AFS securities | Maximum | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.40 |  |  |  |
Trading and AFS securities | Maximum | Prepayment rate (annual CPR) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.40 |  |  |  |
Trading and AFS securities | Maximum | Default rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.18 |  |  |  |
Trading and AFS securities | Maximum | Loss severity | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.50 |  |  |  |
Trading and AFS securities | Weighted Average | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.12 |  |  |  |
Trading and AFS securities | Weighted Average | Prepayment rate (annual CPR) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.13 |  |  |  |
Trading and AFS securities | Weighted Average | Default rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.001 |  |  |  |
Trading and AFS securities | Weighted Average | Loss severity | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Trading and AFS securities |  | 0.25 |  |  |  |
Home Equity Investments (HEI) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Home Equity Investments (HEI) |  | $ 590,080 |  |  |  |
Home Equity Investments (HEI) | Minimum | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.10 |  |  |  |
Home Equity Investments (HEI) | Minimum | Prepayment rate (annual CPR) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.01 |  |  |  |
Home Equity Investments (HEI) | Minimum | Home price appreciation (depreciation) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.04 |  |  |  |
Home Equity Investments (HEI) | Maximum | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.10 |  |  |  |
Home Equity Investments (HEI) | Maximum | Prepayment rate (annual CPR) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.20 |  |  |  |
Home Equity Investments (HEI) | Maximum | Home price appreciation (depreciation) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.04 |  |  |  |
Home Equity Investments (HEI) | Weighted Average | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.10 |  |  |  |
Home Equity Investments (HEI) | Weighted Average | Prepayment rate (annual CPR) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.14 |  |  |  |
Home Equity Investments (HEI) | Weighted Average | Home price appreciation (depreciation) | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
HEI, Measurement input |  | 0.04 |  |  |  |
Servicer advance investments | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Servicing asset |  | $ 212,446 |  |  |  |
Servicer advance investments | Minimum | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Expected remaining life |  | 5 years |  |  |  |
Servicer advance investments | Minimum | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Servicing asset, measurement input |  | 0.11 |  |  |  |
Servicer advance investments | Minimum | Mortgage servicing income | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loan purchase commitments, measurement input |  | 0.0002 |  |  |  |
Servicer advance investments | Maximum | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Expected remaining life |  | 5 years |  |  |  |
Servicer advance investments | Maximum | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Servicing asset, measurement input |  | 0.30 |  |  |  |
Servicer advance investments | Maximum | Mortgage servicing income | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loan purchase commitments, measurement input |  | 0.0049 |  |  |  |
Servicer advance investments | Weighted Average | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Expected remaining life |  | 5 years |  |  |  |
Servicer advance investments | Weighted Average | Whole loan discount rate | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Servicing asset, measurement input |  | 0.14 |  |  |  |
Servicer advance investments | Weighted Average | Mortgage servicing income | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Loan purchase commitments, measurement input |  | 0.0009 |  |  |  |
Other assets | Level 3 |  |  |  |  |  |
Assets |  |  |  |  |  |
Other assets |  | $ 66,102 |  |  |  |
Sequoia |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Fair value of securities owned |  | 333,000 |  |  |  |
Freddie Mac K-Series |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Fair value of securities owned |  | $ 34,000 |  |  |  |
BPL bridge loans held by CAFL |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Securitization entity | securitization_entity |  | 1 |  |  |  |
Residential investor term loans held by CAFL |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Fair value of securities owned |  | $ 339,000 |  | 323,000 |  |
At consolidated CAFL Bridge entities |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Fair value of securities owned |  | 26,000 |  | 22,000 |  |
Freddie Mac SLST |  |  |  |  |  |
Liabilities |  |  |  |  |  |
Fair value of securities owned |  | $ 268,000 |  | $ 274,000 |  |
[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 September 30, 2024 and December 31, 2023, assets of consolidated VIEs totaled $14,312,672 and $10,988,885, respectively. At September 30, 2024 and December 31, 2023, liabilities of consolidated VIEs totaled $13,354,497 and $10,096,308, respectively. See Note 15 for further discussion.

X
- Definition Debt Securities, Trading And Available-for-sale, Fair Value Disclosure + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Debt Securities, Trading And Available-for-sale, Measurement Input + References No definition available. + Details
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Data Type: | xbrli:decimalItemType
Balance Type: | na
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- Definition Home Appreciation Options, Fair value Disclosure + References No definition available. + Details
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Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Home Appreciation Options, Measurement Input + References No definition available. + Details
Name: | rwt_HomeAppreciationOptionsMeasurementInput
Namespace Prefix: | rwt_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Definition Loan Purchase Commitments, Measurement Input + References No definition available. + Details
Name: | rwt_LoanPurchaseCommitmentsMeasurementInput
Namespace Prefix: | rwt_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Definition Loans Held-for-Investment, Measurement Input + References No definition available. + Details
Name: | rwt_LoansHeldForInvestmentMeasurementInput
Namespace Prefix: | rwt_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Definition Loans Receivable, Measurement Input + References No definition available. + Details
Name: | rwt_LoansReceivableMeasurementInput
Namespace Prefix: | rwt_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Definition Securitization Entity + References No definition available. + Details
Name: | rwt_SecuritizationEntity
Namespace Prefix: | rwt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Servicing Asset, Expected Remaining Life + References No definition available. + Details
Name: | rwt_ServicingAssetExpectedRemainingLife
Namespace Prefix: | rwt_
Data Type: | xbrli:durationItemType
Balance Type: | na
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