XML 112 R102.htm IDEA: XBRL DOCUMENT v3.22.1

Derivative Financial Instruments - Aggregate Fair Value and Notional Amount of Derivative Financial Instruments (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Fair Value	$ 31,800,000	$ 23,150,000
Notional Amount	9,842,443,000	6,861,921,000
TBAs
Derivative [Line Items]
Notional Amount	7,940,000,000	3,310,000,000
Interest rate futures
Derivative [Line Items]
Notional Amount	281,000,000	72,000,000
Derivative Liabilities
Derivative [Line Items]
Fair Value	(80,260,000)	(3,317,000)
Notional Amount	4,596,748,000	1,619,790,000
Derivative Liabilities | Interest rate swaps
Derivative [Line Items]
Fair Value	(650,000)	(1,251,000)
Notional Amount	66,000,000	283,100,000
Derivative Liabilities | TBAs
Derivative [Line Items]
Fair Value	(64,883,000)	(658,000)
Notional Amount	3,535,000,000	870,000,000
Derivative Liabilities | Interest rate futures
Derivative [Line Items]
Fair Value	(236,000)	(905,000)
Notional Amount	83,000,000	62,500,000
Derivative Liabilities | Residential loan purchase commitments, net
Derivative [Line Items]
Fair Value	(14,491,000)	(503,000)
Notional Amount	912,748,000	404,190,000
Derivative Assets
Derivative [Line Items]
Fair Value	112,060,000	26,467,000
Notional Amount	5,245,695,000	5,242,131,000
Derivative Assets | Interest rate swaps
Derivative [Line Items]
Fair Value	11,412,000	611,000
Notional Amount	460,000,000	161,500,000
Derivative Assets | TBAs
Derivative [Line Items]
Fair Value	95,631,000	2,880,000
Notional Amount	4,400,000,000	2,440,000,000
Derivative Assets | Interest rate futures
Derivative [Line Items]
Fair Value	2,907,000	25,000
Notional Amount	197,800,000	9,000,000
Derivative Assets | Swaptions
Derivative [Line Items]
Fair Value	0	18,318,000
Notional Amount	0	1,660,000,000
Derivative Assets | Residential loan purchase commitments, net
Derivative [Line Items]
Fair Value	2,110,000	4,633,000
Notional Amount	$ 187,895,000	$ 971,631,000

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=123594938&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=125515794&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=125515794&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_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: