XML 124 R110.htm IDEA: XBRL DOCUMENT v3.21.1

Asset-Backed Securities Issued - Components of Asset-Backed Securities Issued by Consolidated Securitization Entities Sponsored, Along With Other Selected Information (Details)	Mar. 31, 2021 USD ($) series	Dec. 31, 2020 USD ($) series
Debt Instrument [Line Items]
Certificates	$ 1,451,713,000
Net Carrying Value	1,438,262,000
Asset-backed securities issued
Debt Instrument [Line Items]
Net Carrying Value	6,671,677,000	$ 7,100,661,000
Asset-backed securities issued | Revision of Prior Period, Accounting Standards Update, Adjustment
Debt Instrument [Line Items]
Net Carrying Value	192,323,000	257,778,000
Asset-backed securities issued | Certificates with principal balance
Debt Instrument [Line Items]
Certificates	6,287,553,000	6,637,905,000
Asset-backed securities issued | Interest-only certificates
Debt Instrument [Line Items]
Certificates	191,801,000	204,978,000
Asset-backed securities issued | Legacy Sequoia
Debt Instrument [Line Items]
Net Carrying Value	$ 271,915,000	$ 282,326,000
Number of series | series	20	20
Asset-backed securities issued | Legacy Sequoia | Revision of Prior Period, Accounting Standards Update, Adjustment
Debt Instrument [Line Items]
Net Carrying Value	$ (38,820,000)	$ (47,805,000)
Asset-backed securities issued | Legacy Sequoia | Minimum
Debt Instrument [Line Items]
Range of weighted average interest rates, by series	0.32%	0.35%
Asset-backed securities issued | Legacy Sequoia | Maximum
Debt Instrument [Line Items]
Range of weighted average interest rates, by series	1.47%	1.55%
Asset-backed securities issued | Legacy Sequoia | Certificates with principal balance
Debt Instrument [Line Items]
Certificates	$ 309,916,000	$ 329,039,000
Asset-backed securities issued | Legacy Sequoia | Interest-only certificates
Debt Instrument [Line Items]
Certificates	819,000	1,092,000
Asset-backed securities issued | Sequoia Choice
Debt Instrument [Line Items]
Net Carrying Value	$ 1,054,005,000	$ 1,347,357,000
Number of series | series	10	10
Asset-backed securities issued | Sequoia Choice | Revision of Prior Period, Accounting Standards Update, Adjustment
Debt Instrument [Line Items]
Net Carrying Value	$ 27,650,000	$ 32,809,000
Asset-backed securities issued | Sequoia Choice | Minimum
Debt Instrument [Line Items]
Range of weighted average interest rates, by series	2.28%	2.25%
Asset-backed securities issued | Sequoia Choice | Maximum
Debt Instrument [Line Items]
Range of weighted average interest rates, by series	5.06%	5.04%
Asset-backed securities issued | Sequoia Choice | Certificates with principal balance
Debt Instrument [Line Items]
Certificates	$ 1,024,081,000	$ 1,309,957,000
Asset-backed securities issued | Sequoia Choice | Interest-only certificates
Debt Instrument [Line Items]
Certificates	2,274,000	4,591,000
Asset-backed securities issued | Freddie Mac SLST
Debt Instrument [Line Items]
Net Carrying Value	$ 1,921,440,000	$ 1,993,919,000
Number of series | series	3	3
Debt instrument, face amount	$ 200,000,000	$ 205,000,000
Asset-backed securities issued | Freddie Mac SLST | Revision of Prior Period, Accounting Standards Update, Adjustment
Debt Instrument [Line Items]
Net Carrying Value	$ 97,670,000	$ 104,439,000
Asset-backed securities issued | Freddie Mac SLST | Minimum
Debt Instrument [Line Items]
Range of weighted average interest rates, by series	3.50%	3.50%
Asset-backed securities issued | Freddie Mac SLST | Maximum
Debt Instrument [Line Items]
Range of weighted average interest rates, by series	4.75%	4.75%
Asset-backed securities issued | Freddie Mac SLST | Certificates with principal balance
Debt Instrument [Line Items]
Certificates	$ 1,800,808,000	$ 1,866,145,000
Asset-backed securities issued | Freddie Mac SLST | Interest-only certificates
Debt Instrument [Line Items]
Certificates	22,962,000	23,335,000
Asset-backed securities issued | Freddie Mac K-Series
Debt Instrument [Line Items]
Net Carrying Value	$ 460,565,000	$ 463,966,000
Range of weighted average interest rates, by series	3.41%	3.39%
Number of series | series	1	1
Asset-backed securities issued | Freddie Mac K-Series | Revision of Prior Period, Accounting Standards Update, Adjustment
Debt Instrument [Line Items]
Net Carrying Value	$ 23,846,000	$ 34,601,000
Asset-backed securities issued | Freddie Mac K-Series | Certificates with principal balance
Debt Instrument [Line Items]
Certificates	424,393,000	416,339,000
Asset-backed securities issued | Freddie Mac K-Series | Interest-only certificates
Debt Instrument [Line Items]
Certificates	12,326,000	13,026,000
Asset-backed securities issued | CAFL
Debt Instrument [Line Items]
Net Carrying Value	$ 2,963,752,000	$ 3,013,093,000
Number of series | series	14	14
Asset-backed securities issued | CAFL | Revision of Prior Period, Accounting Standards Update, Adjustment
Debt Instrument [Line Items]
Net Carrying Value	$ 81,977,000	$ 133,734,000
Asset-backed securities issued | CAFL | Minimum
Debt Instrument [Line Items]
Range of weighted average interest rates, by series	2.63%	2.68%
Asset-backed securities issued | CAFL | Maximum
Debt Instrument [Line Items]
Range of weighted average interest rates, by series	5.56%	5.42%
Asset-backed securities issued | CAFL | Certificates with principal balance
Debt Instrument [Line Items]
Certificates	$ 2,728,355,000	$ 2,716,425,000
Asset-backed securities issued | CAFL | Interest-only certificates
Debt Instrument [Line Items]
Certificates	$ 153,420,000	$ 162,934,000

X

- Definition

Number of Series

+ References

No definition available.

+ Details

Name:	rwt_NumberOfSeries
Namespace Prefix:	rwt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RestatementAxis=srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=rwt_CertificatesWithPrincipalValueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=rwt_InterestOnlyCertificatesMember
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:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
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:

X

- Details

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