XML 93 R82.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Mortgage Servicing Rights - Details of Retention and Purchase of MSRs (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Mortgage Servicing Rights [Line Items] |  |
MSRs recognized | $ 7,386 | $ 3,463
MSRs |  |
Mortgage Servicing Rights [Line Items] |  |
MSRs recognized | 7,485 | $ 8,807
Associated Principal | 705,334 |
MSRs | Jumbo Loan |  |
Mortgage Servicing Rights [Line Items] |  |
MSRs recognized | 7,386 |
Associated Principal | 686,263 |
MSRs | Jumbo Loan | From securitization |  |
Mortgage Servicing Rights [Line Items] |  |
MSRs recognized | 7,123 |
Associated Principal | 654,605 |
MSRs | Jumbo Loan | From loan sales |  |
Mortgage Servicing Rights [Line Items] |  |
MSRs recognized | 263 |
Associated Principal | 31,658 |
MSRs | Conforming Loan | From purchases |  |
Mortgage Servicing Rights [Line Items] |  |
MSRs recognized | 99 |
Associated Principal | $ 19,071 |

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=68078379&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=68078379&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: |