XML 81 R67.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Principles of Consolidation - Additional Information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 USD ($) | Dec. 31, 2021 USD ($) entity | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) partnership | Dec. 31, 2018 partnership | Sep. 30, 2020 USD ($)
Variable Interest Entity [Line Items] |  |  |  |  |  |
Number of partnerships consolidated | partnership |  |  |  | 2 | 2 |
VIE, ownership interest rate (as a percent) |  | 80.00% |  |  |  |
Deconsolidation, realized market valuation gain (loss) | $ (72,000) |  |  |  |  |
Transfers from loans held-for-investment to loans held-for-sale |  | $ 92,400 | $ 64,520 | $ 22,808 |  |
Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Estimated fair value of investments |  | $ 1,033,913 | 789,228 |  |  |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Number of securitization entities to which asset transferred | entity |  | 49 |  |  |  |
Number of securitization entities called | entity |  | 7 |  |  |  |
Unpaid principal balance of securitizations purchased |  | $ 200,000 |  |  |  |
Gain (loss) on securitization of financial assets |  | 16,000 |  |  |  |
Loans held for sale, fair value of acquired loans |  | $ 172,000 |  |  |  |
Servicing Investment | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Number of partnerships consolidated | entity |  | 2 |  |  |  |
VIE, ownership interest rate (as a percent) |  | 80.00% |  |  |  |
MSRs |  | $ 102,540 |  |  |  |
Estimated fair value of investments |  |  | 67,766 |  |  |
CAFL(1) | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Number of entities called | entity |  | 2 |  |  |  |
Unpaid principal balance of entities called |  | $ 91,000 |  |  |  |
Estimated fair value of investments |  | 31,657 | 238,680 |  |  |
Legacy Sequoia | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Estimated fair value of investments |  | 2,634 | 4,559 |  |  |
Sequoia | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Estimated fair value of investments |  | 245,417 | 220,020 |  |  |
Freddie Mac SLST(1) | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Estimated fair value of investments |  | 339,419 | 229,788 |  |  |
Amortized cost |  |  |  |  |  | $ 210,000
Freddie Mac K-Series | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Estimated fair value of investments |  | $ 301,795 | $ 28,415 |  |  |

X
- Definition Debt Instrument, Asset Backed Securities Issued, Amortized Cost + References No definition available. + Details
Name: | rwt_DebtInstrumentAssetBackedSecuritiesIssuedAmortizedCost
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loans Held-for-Sale, Fair Value, Acquired + References No definition available. + Details
Name: | rwt_LoansHeldForSaleFairValueAcquired
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number Of Consolidated Entities Called + References No definition available. + Details
Name: | rwt_NumberOfConsolidatedEntitiesCalled
Namespace Prefix: | rwt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Partnerships Consolidated + References No definition available. + Details
Name: | rwt_NumberOfPartnershipsConsolidated
Namespace Prefix: | rwt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Securitization Entities Called + References No definition available. + Details
Name: | rwt_NumberOfSecuritizationEntitiesCalled
Namespace Prefix: | rwt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Securitization Entities to which Asset Transferred + References No definition available. + Details
Name: | rwt_NumberOfSecuritizationEntitiesToWhichAssetTransferred
Namespace Prefix: | rwt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Unpaid Principal Balance Of Securitization Purchased + References No definition available. + Details
Name: | rwt_UnpaidPrincipalBalanceOfSecuritizationPurchased
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Variable Interest Entity, Principal Balance Of Entities Called + References No definition available. + Details
Name: | rwt_VariableInterestEntityPrincipalBalanceOfEntitiesCalled
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of net assets (liabilities). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77885760&loc=SL35686385-199418 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 205 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118262037&loc=d3e9915-115836 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(7)) -URI http://asc.fasb.org/extlink&oid=120401555&loc=SL114874367-224272 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 2 -Subparagraph (SX 210.6-05(4)) -URI http://asc.fasb.org/extlink&oid=120401414&loc=d3e604008-122996 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(6)) -URI http://asc.fasb.org/extlink&oid=120401555&loc=SL114874367-224272 + Details
Name: | us-gaap_AssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of gain (loss) from deconsolidation of subsidiary and derecognition of group of assets constituting transfer of business or nonprofit activity, excluding conveyance of oil and gas mineral rights and transfer of good or service in contract with customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684 + Details
Name: | us-gaap_DeconsolidationGainOrLossAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A gain (loss) realized on a transfer, accounted for as a sale, of all or a portion of financial assets in which the transferor surrenders control and receives consideration other than a beneficial interest in the assets transferred. Reflects the amount of sales proceeds in excess of, or deficient from, the sum of the carrying amounts of transferred financial assets plus transaction costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_GainLossOnSecuritizationOfFinancialAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122625-111746 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
Name: | us-gaap_ServicingAssetAtFairValueAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586 + Details
Name: | us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1
Namespace Prefix: | us-gaap_
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_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rwt_ExcessServicingEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rwt_CAFLSecuritizationEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rwt_FreddieMacSLSTSecuritizationEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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