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Short-Term Debt - Outstanding Balances of Short-Term Debt by Type of Collateral Securing Debt (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) Contract | Dec. 31, 2014 USD ($) Contract
Short-term Debt [Line Items] |  |  |
Number of Facilities | Contract |  | 16 | 17
Outstanding | [1] | $ 1,855,003 | $ 1,793,825
Residential Loans |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Contract |  | 4 | 5
Outstanding |  | $ 950,022 | $ 1,076,188
Limit |  | $ 1,400,000 | $ 1,550,000
Weighted Average Interest Rate |  | 1.90% | 1.74%
Weighted Average Days Until Maturity |  | 182 days | 156 days
Residential Loans Held for Investment |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Contract |  | 1 |
Outstanding |  | $ 137,622 |
Limit |  | $ 0 |
Weighted Average Interest Rate |  | 0.21% |
Weighted Average Days Until Maturity |  | 204 days |
Commercial Loans |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Contract |  | 2 | 3
Outstanding |  | $ 73,718 | $ 109,128
Limit |  | $ 300,000 | $ 400,000
Weighted Average Interest Rate |  | 4.13% | 3.66%
Weighted Average Days Until Maturity |  | 265 days | 185 days
Real Estate Securities |  |  |
Short-term Debt [Line Items] |  |  |
Number of Facilities | Contract |  | 9 | 9
Outstanding |  | $ 693,641 | $ 608,509
Weighted Average Interest Rate |  | 1.47% | 1.38%
Weighted Average Days Until Maturity |  | 24 days | 20 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 December 31, 2015 and December 31, 2014, assets of consolidated VIEs totaled $1,195,574 and $1,900,208, respectively. At December 31, 2015 and December 31, 2014, liabilities of consolidated VIEs totaled $1,050,861 and $1,546,490, respectively. See Note 4 for further discussion.

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