XML 103 R91.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Mortgage Servicing Rights - Details of Retention and Purchase of MSRs (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized |  |  | $ 5,688 | $ 36,834
Mortgage servicing rights |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | $ 10,691 | $ 32,463 | 19,498 | $ 51,217
Associated Principal | 1,187,171 |  | 2,057,242 |
Mortgage servicing rights | Jumbo Loan |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 2,209 |  | 2,255 |
Associated Principal | 321,215 |  | 327,734 |
Mortgage servicing rights | Jumbo Loan | From securitizations |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 2,131 |  | 2,131 |
Associated Principal | 310,242 |  | 310,242 |
Mortgage servicing rights | Jumbo Loan | Loan Sales |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 78 |  | 124 |
Associated Principal | 10,973 |  | 17,492 |
Mortgage servicing rights | Conforming Loan |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 8,482 |  | 17,243 |
Associated Principal | 865,956 |  | 1,729,508 |
Mortgage servicing rights | Conforming Loan | Loan Sales |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 16 |  | 3,380 |
Associated Principal | 1,772 |  | 316,290 |
Mortgage servicing rights | Conforming Loan | From purchases |  |  |  |
Mortgage Servicing Rights [Line Items] |  |  |  |
MSRs recognized | 8,466 |  | 13,863 |
Associated Principal | $ 864,184 |  | $ 1,413,218 |

X
- Definition Mortgage Servicing Rights [Line Items] + References No definition available. + Details
Name: | rwt_MortgageServicingRightsLineItems
Namespace Prefix: | rwt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=56950315&loc=d3e122739-111746 + Details
Name: | us-gaap_ServicingAssetAtAmortizedValueAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=56950315&loc=d3e122625-111746 + Details
Name: | us-gaap_ServicingAssetAtFairValueAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=rwt_MortgageServicingRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MortgageLoansOnRealEstateLoanTypeAxis=rwt_JumboLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=rwt_SecuritizationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=rwt_LoanSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MortgageLoansOnRealEstateLoanTypeAxis=rwt_ConformingLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=rwt_LoanPurchasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |