XML 138 R101.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Asset-Backed Securities Issued - Additional Information (Detail) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 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 | $ 1,353,021,000 us-gaap_SecuredDebt | [1],[2] |  | $ 1,545,119,000 us-gaap_SecuredDebt | [1],[2]
Asset-backed Securities |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
ABS issued principal | 1,353,021,000 us-gaap_SecuredDebt / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember |  |  | 1,545,119,000 us-gaap_SecuredDebt / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember |
Amortization of deferred ABS issuance costs, less than | 1,000,000 us-gaap_AmortizationOfFinancingCosts / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember |  | 1,000,000 us-gaap_AmortizationOfFinancingCosts / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember |  |
Asset-backed Securities | Contractual maturities of over five years |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
ABS issued principal | 1,350,000,000 us-gaap_SecuredDebt / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_InvestmentSecondaryCategorizationAxis = rwt_MaturityOverFiveYearsMember |  |  |  |
Contractual maturities of ABS (in years) | 5 years |  |  |  |
Asset-backed Securities | Maturity Less Than One Year |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
ABS issued principal | 7,000,000 us-gaap_SecuredDebt / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_InvestmentSecondaryCategorizationAxis = rwt_MatureInLessThanOneYearMember |  |  |  |
Contractual maturities of ABS, maximum (in years) | 1 year |  |  |  |
Asset-backed Securities | Certificates With Principal Value |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal value | 1,473,602,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_InvestmentTypeAxis = rwt_CertificatesWithPrincipalValueMember |  |  | 1,555,413,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_InvestmentTypeAxis = rwt_CertificatesWithPrincipalValueMember |
Asset-backed Securities | Certificates With Principal Value | Contractual maturities of over five years |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal value | 1,460,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_InvestmentSecondaryCategorizationAxis = rwt_MaturityOverFiveYearsMember / us-gaap_InvestmentTypeAxis = rwt_CertificatesWithPrincipalValueMember |  |  |  |
Asset-backed Securities | Certificates With Principal Value | Maturity Less Than One Year |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal value | $ 16,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = us-gaap_AssetBackedSecuritiesMember / us-gaap_InvestmentSecondaryCategorizationAxis = rwt_MatureInLessThanOneYearMember / us-gaap_InvestmentTypeAxis = rwt_CertificatesWithPrincipalValueMember |  |  |  |
[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 the primary beneficiary (Redwood Trust, Inc.). At March 31, 2015 and December 31, 2014, assets of consolidated VIEs totaled $1,716,563 and $1,900,208, respectively, and liabilities of consolidated VIEs totaled $1,354,298 and $1,546,490, respectively. See Note 4 for further discussion.
[2] | 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.

X
- Definition Long Term Marketable Securities Maturities Term + References No definition available. + Details
Name: | rwt_LongTermMarketableSecuritiesMaturitiesTerm
Namespace Prefix: | rwt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long Term Marketable Securities Maturities Term, Maximum + References No definition available. + Details
Name: | rwt_LongTermMarketableSecuritiesMaturitiesTermMaximum
Namespace Prefix: | rwt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 + Details
Name: | us-gaap_AmortizationOfFinancingCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Description of the interest rate as being fixed or variable, and, if variable, identification of the index or rate on which the interest rate is based and the number of points or percentage added to that index or rate to set the rate, and other pertinent information, such as frequency of rate resets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 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 Reference 4: 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 + Details
Name: | us-gaap_SecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |