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Asset-Backed Securities Issued - Components of Asset-Backed Securities Issued by Consolidated Securitization Entities Sponsored, Along With Other Selected Information (Detail) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) series | Dec. 31, 2014 USD ($) series
Debt Instrument [Line Items] |  |  |
ABS issued principal | [1],[2] | $ 1,178,795 | $ 1,545,119
Asset-backed Securities |  |  |
Debt Instrument [Line Items] |  |  |
Market valuation adjustments |  | (119,707) |
Unamortized discount |  |  | (12,373)
ABS issued principal |  | 1,178,795 | 1,545,119
Asset-backed Securities | Certificates With Principal Value |  |  |
Debt Instrument [Line Items] |  |  |
Principal value |  | 1,293,626 | 1,555,413
Asset-backed Securities | Interest Only Certificates |  |  |
Debt Instrument [Line Items] |  |  |
Principal value |  | 4,876 | 2,079
Asset-backed Securities | Sequoia |  |  |
Debt Instrument [Line Items] |  |  |
Market valuation adjustments |  | (119,707) |
Unamortized discount |  |  | (12,373)
ABS issued principal |  | $ 1,105,588 | $ 1,416,762
Number of series | series |  | 24 | 24
Asset-backed Securities | Sequoia | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rates, by series |  | 0.41% | 0.36%
Stated maturities |  | 2017 | 2014
Asset-backed Securities | Sequoia | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rates, by series |  | 4.39% | 4.27%
Stated maturities |  | 2041 | 2041
Asset-backed Securities | Sequoia | Certificates With Principal Value |  |  |
Debt Instrument [Line Items] |  |  |
Principal value |  | $ 1,220,419 | $ 1,427,056
Asset-backed Securities | Sequoia | Interest Only Certificates |  |  |
Debt Instrument [Line Items] |  |  |
Principal value |  | 4,876 | 2,079
Asset-backed Securities | Residential Resecuritization |  |  |
Debt Instrument [Line Items] |  |  |
ABS issued principal |  | $ 5,261 | $ 45,044
Weighted average interest rates, by series |  | 2.20% | 2.16%
Stated maturities |  | 2046 | 2046
Number of series | series |  | 1 | 1
Asset-backed Securities | Residential Resecuritization | Certificates With Principal Value |  |  |
Debt Instrument [Line Items] |  |  |
Principal value |  | $ 5,261 | $ 45,044
Asset-backed Securities | Commercial Securitization |  |  |
Debt Instrument [Line Items] |  |  |
ABS issued principal |  | $ 67,946 | $ 83,313
Weighted average interest rates, by series |  | 5.62% | 5.62%
Stated maturities |  | 2018 | 2018
Number of series | series |  | 1 | 1
Asset-backed Securities | Commercial Securitization | Certificates With Principal Value |  |  |
Debt Instrument [Line Items] |  |  |
Principal value |  | $ 67,946 | $ 83,313
[1] | On January 1, 2015, we adopted ASU 2014-13 and began to account for residential loans held-for-investment and asset backed securities issued at consolidated Sequoia entities (which are VIEs) at fair value. At December 31, 2014, amounts presented in residential loans held-for-investment for these assets included $1,474,386 at historical cost. See Note 3 for further discussion.
[2] | 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, 2015 and December 31, 2014, assets of consolidated VIEs totaled $1,539,350 and $1,900,208, respectively. At September 30, 2015 and December 31, 2014, liabilities of consolidated VIEs totaled $1,179,884 and $1,546,490, respectively. See Note 4 for further discussion.

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