XML 113 R99.htm IDEA: XBRL DOCUMENT
v3.20.2

Derivative Financial Instruments - Aggregate Fair Value and Notional Amount of Derivative Financial Instruments (Details) - USD ($) | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Derivative [Line Items] |  |
Fair Value | $ 13,097,000 | $ (127,723,000)
Notional Amount | 2,575,858,000 | 13,589,356,000
TBAs |  |
Derivative [Line Items] |  |
Notional Amount | 245,000,000 | 6,610,000,000
Interest rate futures |  |
Derivative [Line Items] |  |
Notional Amount | 40,000,000 | 226,000,000
Derivative Liabilities |  |
Derivative [Line Items] |  |
Fair Value | (1,612,000) | (163,424,000)
Notional Amount | 361,651,000 | 6,929,494,000
Derivative Liabilities | Interest rate swaps |  |
Derivative [Line Items] |  |
Fair Value | (15,000) | (97,235,000)
Notional Amount | 25,000,000 | 2,314,300,000
Derivative Liabilities | Interest rate swaps | Cash Flow Hedging |  |
Derivative [Line Items] |  |
Fair Value | 0 | (51,530,000)
Notional Amount | 0 | 139,500,000
Derivative Liabilities | TBAs |  |
Derivative [Line Items] |  |
Fair Value | (263,000) | (13,359,000)
Notional Amount | 105,000,000 | 4,160,000,000
Derivative Liabilities | Interest rate futures |  |
Derivative [Line Items] |  |
Fair Value | 0 | (10,000)
Notional Amount | 0 | 12,300,000
Derivative Liabilities | Loan purchase and interest rate lock commitments |  |
Derivative [Line Items] |  |
Fair Value | (1,334,000) | (1,290,000)
Notional Amount | 231,651,000 | 303,394,000
Derivative Assets |  |
Derivative [Line Items] |  |
Fair Value | 14,709,000 | 35,701,000
Notional Amount | 2,214,207,000 | 6,659,862,000
Derivative Assets | Interest rate swaps |  |
Derivative [Line Items] |  |
Fair Value | 78,000 | 17,095,000
Notional Amount | 25,000,000 | 1,399,000,000
Derivative Assets | TBAs |  |
Derivative [Line Items] |  |
Fair Value | 402,000 | 5,755,000
Notional Amount | 140,000,000 | 2,445,000,000
Derivative Assets | Interest rate futures |  |
Derivative [Line Items] |  |
Fair Value | 63,000 | 777,000
Notional Amount | 40,000,000 | 213,700,000
Derivative Assets | Swaptions |  |
Derivative [Line Items] |  |
Fair Value | 3,393,000 | 1,925,000
Notional Amount | 285,000,000 | 1,065,000,000
Derivative Assets | Loan purchase and interest rate lock commitments |  |
Derivative [Line Items] |  |
Fair Value | 10,773,000 | 10,149,000
Notional Amount | $ 1,724,207,000 | $ 1,537,162,000

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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + 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
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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_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: |