XML 121 R109.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Investment Fair Value Changes, Net - Components of Investment Activities (Details) - Investment Fair Value Changes, Net - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | $ 10,332 | $ 324 | $ 12,830 | $ 9,990
Residential loans held-for-investment, at Redwood |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | (17,063) | 2,881 | (71,058) | 8,902
Fix-and-flip loans held-for-investment |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | 53 | 0 | 53 | 0
Trading securities |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | 6,314 | 607 | 2,429 | 30,676
Legacy Sequoia |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | (248) | (1,045) | (976) | (3,842)
Sequoia Choice |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | (943) | (256) | 43 | (256)
Freddie Mac K-Series |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | 511 | 0 | 511 | 0
Risk-sharing investments |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | (126) | (267) | (474) | (985)
Risk management derivatives, net |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | 21,867 | (1,592) | 82,391 | (24,557)
Commercial loan |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | 0 | 0 | 0 | 300
Impairments on AFS securities |  |  |  |
Investment Holdings [Line Items] |  |  |  |
Changes in fair value of assets | $ (33) | $ (4) | $ (89) | $ (248)

X
- Definition Increase (Decrease) in Fair Value Adjustments on Assets + References No definition available. + Details
Name: | rwt_IncreaseDecreaseinFairValueAdjustmentsonAssets
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_InvestmentHoldingsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rwt_ResidentialLoansHeldForInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rwt_FixAndFlipLoansHeldforinvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rwt_TradingSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rwt_LegacySequoiaSecuritizationEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rwt_SequoiaChoiceSecuritizationEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rwt_FreddieMacKSeriesSecuritizationEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rwt_RiskSharingInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_PriceRiskDerivativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=rwt_ImpairedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |