XML 104 R93.htm IDEA: XBRL DOCUMENT
v3.25.3

Derivative Financial Instruments - Schedule of Market Valuation Gains (Losses) on Derivatives, Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Derivative [Line Items] |  |  |  |
Market Valuation Gains (Losses) on Derivatives, net | $ 37,649 | $ 37,220 | $ 181,130 | $ 38,887
Derivative Gain Loss Statement of Income or Comprehensive Income Extensible Enumeration Not Disclosed Flag | Market Valuation Gains (Losses) on Derivatives, net | Market Valuation Gains (Losses) on Derivatives, net | Market Valuation Gains on Derivatives, net | Market Valuation Gains on Derivatives, net
LPCs and IRLCs |  |  |  |
Derivative [Line Items] |  |  |  |
Changes in fair value of assets | $ 41,990 | $ 9,801 | $ 81,879 | $ 11,331
Risk Management Derivatives |  |  |  |
Derivative [Line Items] |  |  |  |
Market Valuation Gains (Losses) on Derivatives, net | $ (4,341) | $ 27,419 | $ 99,251 | $ 27,556

X
- Definition Derivative Gain Loss Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag + References No definition available. + Details
Name: | rwt_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumerationNotDisclosedFlag
Namespace Prefix: | rwt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase (Decrease) in Fair Value Adjustments on Assets + References No definition available. + Details
Name: | rwt_IncreaseDecreaseinFairValueAdjustmentsonAssets
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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