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Asset-Backed Securities Issued - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Debt Instrument [Line Items] |  |  |  |  |  |
Description of interest rate |  |  |  | Substantially all ABS issued pay variable rates of interest, which are indexed to one-, three-, or six-month LIBOR. |  |
ABS issued principal | [1],[2] | $ 1,178,795 |  | $ 1,178,795 |  | $ 1,545,119
Asset-backed Securities |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
ABS issued principal |  | 1,178,795 |  | 1,178,795 |  | 1,545,119
Amortization of deferred ABS issuance costs, less than |  | 1,000 | $ 1,000 | 1,000 | $ 2,000 |
Asset-backed Securities | Contractual maturities of over five years |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
ABS issued principal |  | 1,180,000 |  | $ 1,180,000 |  |
Contractual maturities of ABS (in years) |  |  |  | 5 years |  |
Asset-backed Securities | Certificates With Principal Value |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal value |  | 1,293,626 |  | $ 1,293,626 |  | $ 1,555,413
Asset-backed Securities | Certificates With Principal Value | Contractual maturities of over five years |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal value |  | $ 1,290,000 |  | $ 1,290,000 |  |
[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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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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