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Principles of Consolidation - Schedule of Assets and Liabilities of Consolidated Variable Interest Entity's (Details) $ in Thousands | Dec. 31, 2023 USD ($) Investment | Dec. 31, 2022 USD ($) Investment | Dec. 31, 2021 USD ($)
--- | --- | --- | ---
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments | [1] | $ 550,436 |  | $ 403,462 |  |
Other investments | [1] | 343,930 |  | 390,938 |  |
Cash and cash equivalents |  | 293,104 | [1] | 258,894 | [1] | $ 450,000
Accrued interest receivable |  | 69,072 |  | 60,893 |  |
Other assets | [1] | 351,109 |  | 211,240 |  |
Total Assets | [1] | 14,504,327 |  | 13,030,899 |  |
Short-term debt, net | [1] | 1,558,222 |  | 2,029,679 |  |
Accrued interest payable |  | 52,755 |  | 46,612 |  |
Accrued expenses and other liabilities | [1] | 216,803 |  | 180,203 |  |
Asset-backed securities issued | [1] | 9,811,880 |  | 7,986,752 |  |
Total Liabilities | [1] | 13,301,634 |  | 11,946,914 |  |
Net investments in consolidated CAFL Term entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of securities owned |  | 323,000 |  | 304,000 |  |
CAFL Bridge Loan Securitization |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of securities owned |  | 22,000 |  | 0 |  |
Freddie Mac SLST |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of securities owned |  | 274,000 |  | 323,000 |  |
Business purpose loans, held-for-investment |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans | [1] | 5,040,048 |  | 4,968,513 |  |
Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Total Assets |  | 10,988,885 |  | 9,257,291 |  |
Variable Interest Entity, Primary Beneficiary | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments |  | 305,717 |  | 132,627 |  |
Other investments |  | 257,489 |  | 301,213 |  |
Cash and cash equivalents |  | 9,482 |  | 13,475 |  |
Restricted cash |  | 44,905 |  | 29,862 |  |
Accrued interest receivable |  | 47,798 |  | 36,392 |  |
Other assets |  | 24,443 |  | 25,397 |  |
Total Assets |  | 10,988,885 |  | 9,257,291 |  |
Short-term debt, net |  | 153,653 |  | 206,510 |  |
Accrued interest payable |  | 33,932 |  | 25,300 |  |
Accrued expenses and other liabilities |  | 96,843 |  | 51,714 |  |
Asset-backed securities issued |  | 9,811,880 |  | 7,986,752 |  |
Total Liabilities |  | 10,096,308 |  | 8,270,276 |  |
Estimated fair value of investments |  | $ 885,770 |  | $ 979,267 |  |
Number of VIEs | Investment |  | 72 |  | 64 |  |
Variable Interest Entity, Primary Beneficiary | Residential loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | $ 6,139,445 |  | $ 4,832,407 |  |
Variable Interest Entity, Primary Beneficiary | Business purpose loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 3,734,321 |  | 3,461,367 |  |
Variable Interest Entity, Primary Beneficiary | Consolidated Agency multifamily loans | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 425,285 |  | 424,551 |  |
Variable Interest Entity, Primary Beneficiary | Legacy Sequoia | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments |  | 0 |  | 0 |  |
Other investments |  | 0 |  | 0 |  |
Cash and cash equivalents |  | 0 |  | 0 |  |
Restricted cash |  | 68 |  | 69 |  |
Accrued interest receivable |  | 332 |  | 284 |  |
Other assets |  | 0 |  | 637 |  |
Total Assets |  | 140,139 |  | 185,922 |  |
Short-term debt, net |  | 0 |  | 0 |  |
Accrued interest payable |  | 303 |  | 282 |  |
Accrued expenses and other liabilities |  | 0 |  | 0 |  |
Asset-backed securities issued |  | 138,530 |  | 184,191 |  |
Total Liabilities |  | 138,833 |  | 184,473 |  |
Estimated fair value of investments |  | $ 1,209 |  | $ 1,285 |  |
Number of VIEs | Investment |  | 20 |  | 20 |  |
Variable Interest Entity, Primary Beneficiary | Legacy Sequoia | Residential loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | $ 139,739 |  | $ 184,932 |  |
Variable Interest Entity, Primary Beneficiary | Legacy Sequoia | Business purpose loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Legacy Sequoia | Consolidated Agency multifamily loans | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Sequoia | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments |  | 0 |  | 0 |  |
Other investments |  | 0 |  | 0 |  |
Cash and cash equivalents |  | 0 |  | 0 |  |
Restricted cash |  | 95 |  | 73 |  |
Accrued interest receivable |  | 19,697 |  | 11,227 |  |
Other assets |  | 0 |  | 0 |  |
Total Assets |  | 4,660,256 |  | 3,201,717 |  |
Short-term debt, net |  | 0 |  | 0 |  |
Accrued interest payable |  | 15,990 |  | 8,880 |  |
Accrued expenses and other liabilities |  | 0 |  | 81 |  |
Asset-backed securities issued |  | 4,430,130 |  | 2,971,109 |  |
Total Liabilities |  | 4,446,120 |  | 2,980,070 |  |
Estimated fair value of investments |  | $ 210,429 |  | $ 219,299 |  |
Number of VIEs | Investment |  | 22 |  | 17 |  |
Variable Interest Entity, Primary Beneficiary | Sequoia | Residential loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | $ 4,640,464 |  | $ 3,190,417 |  |
Variable Interest Entity, Primary Beneficiary | Sequoia | Business purpose loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Sequoia | Consolidated Agency multifamily loans | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Net investments in consolidated CAFL Term entities | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments |  | 0 |  | 0 |  |
Other investments |  | 0 |  | 0 |  |
Cash and cash equivalents |  | 0 |  | 710 |  |
Restricted cash |  | 33,921 |  | 26,296 |  |
Accrued interest receivable |  | 20,806 |  | 18,102 |  |
Other assets |  | 14,886 |  | 14,265 |  |
Total Assets |  | 3,803,934 |  | 3,520,740 |  |
Short-term debt, net |  | 0 |  | 0 |  |
Accrued interest payable |  | 11,537 |  | 10,918 |  |
Accrued expenses and other liabilities |  | 2,734 |  | 4,559 |  |
Asset-backed securities issued |  | 3,362,978 |  | 3,115,807 |  |
Total Liabilities |  | 3,377,249 |  | 3,131,284 |  |
Estimated fair value of investments |  | $ 424,136 |  | $ 385,927 |  |
Number of VIEs | Investment |  | 21 |  | 19 |  |
Variable Interest Entity, Primary Beneficiary | Net investments in consolidated CAFL Term entities | Residential loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | $ 0 |  | $ 0 |  |
Variable Interest Entity, Primary Beneficiary | Net investments in consolidated CAFL Term entities | Business purpose loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 3,734,321 |  | 3,461,367 |  |
Variable Interest Entity, Primary Beneficiary | Net investments in consolidated CAFL Term entities | Consolidated Agency multifamily loans | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Freddie Mac SLST | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments |  | 0 |  | 0 |  |
Other investments |  | 0 |  | 0 |  |
Cash and cash equivalents |  | 0 |  | 0 |  |
Restricted cash |  | 0 |  | 0 |  |
Accrued interest receivable |  | 4,821 |  | 5,144 |  |
Other assets |  | 3,158 |  | 2,898 |  |
Total Assets |  | 1,367,221 |  | 1,465,100 |  |
Short-term debt, net |  | 0 |  | 0 |  |
Accrued interest payable |  | 4,496 |  | 3,561 |  |
Accrued expenses and other liabilities |  | 0 |  | 0 |  |
Asset-backed securities issued |  | 1,265,777 |  | 1,222,150 |  |
Total Liabilities |  | 1,270,273 |  | 1,225,711 |  |
Estimated fair value of investments |  | $ 96,623 |  | $ 237,807 |  |
Number of VIEs | Investment |  | 3 |  | 3 |  |
Variable Interest Entity, Primary Beneficiary | Freddie Mac SLST | Residential loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | $ 1,359,242 |  | $ 1,457,058 |  |
Variable Interest Entity, Primary Beneficiary | Freddie Mac SLST | Business purpose loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Freddie Mac SLST | Consolidated Agency multifamily loans | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Freddie Mac K-Series | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments |  | 0 |  | 0 |  |
Other investments |  | 0 |  | 0 |  |
Cash and cash equivalents |  | 0 |  | 0 |  |
Restricted cash |  | 0 |  | 0 |  |
Accrued interest receivable |  | 1,320 |  | 1,293 |  |
Other assets |  | 0 |  | 0 |  |
Total Assets |  | 426,605 |  | 425,844 |  |
Short-term debt, net |  | 0 |  | 0 |  |
Accrued interest payable |  | 1,190 |  | 1,167 |  |
Accrued expenses and other liabilities |  | 0 |  | 0 |  |
Asset-backed securities issued |  | 391,977 |  | 392,785 |  |
Total Liabilities |  | 393,167 |  | 393,952 |  |
Estimated fair value of investments |  | $ 33,308 |  | $ 31,767 |  |
Number of VIEs | Investment |  | 1 |  | 1 |  |
Variable Interest Entity, Primary Beneficiary | Freddie Mac K-Series | Residential loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | $ 0 |  | $ 0 |  |
Variable Interest Entity, Primary Beneficiary | Freddie Mac K-Series | Business purpose loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Freddie Mac K-Series | Consolidated Agency multifamily loans | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 425,285 |  | 424,551 |  |
Variable Interest Entity, Primary Beneficiary | Servicing Investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments |  | 0 |  | 0 |  |
Other investments |  | 257,489 |  | 301,213 |  |
Cash and cash equivalents |  | 9,482 |  | 12,765 |  |
Restricted cash |  | 0 |  | 0 |  |
Accrued interest receivable |  | 822 |  | 342 |  |
Other assets |  | 6,337 |  | 7,547 |  |
Total Assets |  | 274,130 |  | 321,867 |  |
Short-term debt, net |  | 153,653 |  | 206,510 |  |
Accrued interest payable |  | 416 |  | 492 |  |
Accrued expenses and other liabilities |  | 34,357 |  | 24,745 |  |
Asset-backed securities issued |  | 0 |  | 0 |  |
Total Liabilities |  | 188,426 |  | 231,747 |  |
Estimated fair value of investments |  | $ 85,704 |  | $ 90,120 |  |
Number of VIEs | Investment |  | 3 |  | 3 |  |
Variable Interest Entity, Primary Beneficiary | Servicing Investment | Residential loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | $ 0 |  | $ 0 |  |
Variable Interest Entity, Primary Beneficiary | Servicing Investment | Business purpose loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | Servicing Investment | Consolidated Agency multifamily loans | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | HEI | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Home equity investments |  | 305,717 |  | 132,627 |  |
Other investments |  | 0 |  | 0 |  |
Cash and cash equivalents |  | 0 |  | 0 |  |
Restricted cash |  | 10,821 |  | 3,424 |  |
Accrued interest receivable |  | 0 |  | 0 |  |
Other assets |  | 62 |  | 50 |  |
Total Assets |  | 316,600 |  | 136,101 |  |
Short-term debt, net |  | 0 |  | 0 |  |
Accrued interest payable |  | 0 |  | 0 |  |
Accrued expenses and other liabilities |  | 59,752 |  | 22,329 |  |
Asset-backed securities issued |  | 222,488 |  | 100,710 |  |
Total Liabilities |  | 282,240 |  | 123,039 |  |
Estimated fair value of investments |  | $ 34,361 |  | $ 13,062 |  |
Number of VIEs | Investment |  | 2 |  | 1 |  |
Fair value of securities owned |  | $ 34,000 |  |  |  |
Variable Interest Entity, Primary Beneficiary | HEI | Residential loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | $ 0 |  |
Variable Interest Entity, Primary Beneficiary | HEI | Business purpose loans, held-for-investment | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | 0 |  | 0 |  |
Variable Interest Entity, Primary Beneficiary | HEI | Consolidated Agency multifamily loans | Collateralized Financing Entities |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Fair value of loans |  | $ 0 |  | $ 0 |  |
[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, 2023 and 2022, assets of consolidated VIEs totaled $10,988,885 and $9,257,291, respectively. At December 31, 2023 and 2022, liabilities of consolidated VIEs totaled $10,096,308 and $8,270,276, respectively. See Note 4 for further discussion.

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. 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