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Short-Term Debt - Remaining Maturities of Short Term Debt (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Short-term Debt [Line Items] |  |  |
Short-term debt | [1] | $ 1,750,941 | $ 522,609
Within 30 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 43,800 |
31 to 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 466,540 |
Over 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 1,240,601 |
Facilities |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 1,599,030 | 314,234
Facilities | Within 30 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 43,800 |
Facilities | 31 to 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 314,629 |
Facilities | Over 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 1,240,601 |
Facilities | Held-for-sale residential loans |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 1,335,464 | 137,269
Facilities | Held-for-sale residential loans | Within 30 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 0 |
Facilities | Held-for-sale residential loans | 31 to 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 278,663 |
Facilities | Held-for-sale residential loans | Over 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 1,056,801 |
Facilities | Business purpose loans |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 183,800 |
Facilities | Business purpose loans | Within 30 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 0 |
Facilities | Business purpose loans | 31 to 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 0 |
Facilities | Business purpose loans | Over 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 183,800 |
Facilities | Real estate securities |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 79,766 |
Facilities | Real estate securities | Within 30 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 43,800 |
Facilities | Real estate securities | 31 to 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 35,966 |
Facilities | Real estate securities | Over 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 0 |
Servicer advance financing |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 151,911 | $ 208,375
Servicer advance financing | Within 30 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 0 |
Servicer advance financing | 31 to 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | 151,911 |
Servicer advance financing | Over 90 days |  |  |
Short-term Debt [Line Items] |  |  |
Short-term debt |  | $ 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 September 30, 2021 and December 31, 2020, assets of consolidated VIEs totaled $9,358,317 and $8,141,069, respectively. At September 30, 2021 and December 31, 2020, liabilities of consolidated VIEs totaled $8,391,761 and $7,348,713, respectively. See Note 4 for further discussion.

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