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Short-Term Debt - Outstanding Balances of Short-Term Debt by Type of Collateral Securing Debt (Details) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 USD ($) Facility | Dec. 31, 2015 USD ($) Facility
Short-term Debt [Line Items] |  |  |
Number of Facilities | Facility |  | 12 | 16
Outstanding Balance | [1] | $ 1,117,405,000 | $ 1,855,003,000
Residential loan warehouse |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Facility |  | 4 |
Outstanding Balance |  | $ 837,846,000 |
Limit |  | $ 1,325,000,000 |
Weighted Average Interest Rate (as a percent) |  | 2.07% |
Weighted Average Days Until Maturity (in days) |  | 145 days |
Commercial loan warehouse |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Facility |  | 1 | 2
Outstanding Balance |  | $ 0 | $ 73,718,000
Limit |  | $ 150,000,000 | $ 300,000,000
Weighted Average Interest Rate (as a percent) |  |  | 4.13%
Weighted Average Days Until Maturity (in days) |  |  | 265 days
Real estate securities repo |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Facility |  | 7 | 9
Outstanding Balance |  | $ 279,559,000 | $ 693,641,000
Limit |  | $ 0 | $ 0
Weighted Average Interest Rate (as a percent) |  | 1.79% | 1.47%
Weighted Average Days Until Maturity (in days) |  | 26 days | 24 days
Held-for-sale residential loan warehouse |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Facility |  |  | 4
Outstanding Balance |  |  | $ 950,022,000
Limit |  |  | $ 1,400,000,000
Weighted Average Interest Rate (as a percent) |  |  | 1.90%
Weighted Average Days Until Maturity (in days) |  |  | 182 days
FHLBC |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Facility |  |  | 1
Outstanding Balance |  |  | $ 137,622,000
Limit |  |  | $ 0
Weighted Average Interest Rate (as a percent) |  |  | 0.21%
Weighted Average Days Until Maturity (in days) |  |  | 204 days
[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, 2016 and December 31, 2015, assets of consolidated VIEs totaled $847,399 and $1,195,574, respectively. At September 30, 2016 and December 31, 2015, liabilities of consolidated VIEs totaled $820,391 and $1,050,861, respectively. See Note 4 for further discussion.

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