XML 96 R85.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Derivative Financial Instruments - Aggregate Fair Value and Notional Amount of Derivative Financial Instruments (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Derivative [Line Items] |  |
Fair Value | $ 7,343 | $ (47,363)
Notional Amount | 7,639,175 | 6,644,081
TBAs |  |
Derivative [Line Items] |  |
Notional Amount | 2,630,000 | 1,700,000
Futures |  |
Derivative [Line Items] |  |
Notional Amount | 15,000 | 8,000
Derivative Liabilities |  |
Derivative [Line Items] |  |
Fair Value | (56,201) | (63,081)
Notional Amount | 2,684,123 | 3,485,466
Derivative Liabilities | Interest rate swaps |  |
Derivative [Line Items] |  |
Fair Value | (11,346) | (11,888)
Notional Amount | 451,500 | 1,248,000
Derivative Liabilities | Interest rate swaps | Cash Flow Hedging |  |
Derivative [Line Items] |  |
Fair Value | (35,167) | (43,679)
Notional Amount | 139,500 | 139,500
Derivative Liabilities | TBAs |  |
Derivative [Line Items] |  |
Fair Value | (5,457) | (3,808)
Notional Amount | 1,110,000 | 1,400,000
Derivative Liabilities | Futures |  |
Derivative [Line Items] |  |
Fair Value | (357) | 0
Notional Amount | 15,000 | 0
Derivative Liabilities | Loan purchase commitments |  |
Derivative [Line Items] |  |
Fair Value | (2,605) | (3,706)
Notional Amount | 627,803 | 697,966
Derivative Liabilities | Loan forward sale commitments |  |
Derivative [Line Items] |  |
Fair Value | (1,269) | 0
Notional Amount | 340,320 | 0
Derivative Assets |  |
Derivative [Line Items] |  |
Fair Value | 63,544 | 15,718
Notional Amount | 4,955,052 | 3,158,615
Derivative Assets | Interest rate swaps |  |
Derivative [Line Items] |  |
Fair Value | 50,919 | 10,122
Notional Amount | 2,869,500 | 1,765,000
Derivative Assets | TBAs |  |
Derivative [Line Items] |  |
Fair Value | 8,625 | 133
Notional Amount | 1,515,000 | 295,000
Derivative Assets | Futures |  |
Derivative [Line Items] |  |
Fair Value | 0 | 1
Notional Amount | 0 | 7,500
Derivative Assets | Swaptions |  |
Derivative [Line Items] |  |
Fair Value | 0 | 42
Notional Amount | 0 | 200,000
Derivative Assets | Loan purchase commitments |  |
Derivative [Line Items] |  |
Fair Value | 4,000 | 3,243
Notional Amount | 570,552 | 547,434
Derivative Assets | Loan forward sale commitments |  |
Derivative [Line Items] |  |
Fair Value | 0 | 2,177
Notional Amount | $ 0 | $ 343,681

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=rwt_ToBeAnnouncedContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_FutureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_LoanPurchaseCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=rwt_ForwardSalesCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwaptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |