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Residential Investor Loans - Classifications and Carrying Values of Residential Investor Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Held-for-sale at fair value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | $ 265,878 | $ 180,250
Held-for-sale at fair value | Residential Investor Term | Redwood |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 174,485 | 144,359
Held-for-sale at fair value | Residential Investor Term | CAFL |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
Held-for-sale at fair value | Residential Investor Bridge | Redwood |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 91,393 | 35,891
Held-for-sale at fair value | Residential Investor Bridge | CAFL |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
Held-for-investment at fair value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 4,480,296 | 5,040,048
Held-for-investment at fair value | Residential Investor Term | Redwood |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
Held-for-investment at fair value | Residential Investor Term | CAFL |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 2,661,885 | 2,971,725
Held-for-investment at fair value | Residential Investor Bridge | Redwood |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 1,211,081 | 1,305,727
Held-for-investment at fair value | Residential Investor Bridge | CAFL |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 607,330 | 762,596
Total Residential Investor Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 4,746,174 | 5,220,298
Total Residential Investor Loans | Residential Investor Term | Redwood |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 174,485 | 144,359
Total Residential Investor Loans | Residential Investor Term | CAFL |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 2,661,885 | 2,971,725
Total Residential Investor Loans | Residential Investor Bridge | Redwood |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 1,302,474 | 1,341,618
Total Residential Investor Loans | Residential Investor Bridge | CAFL |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | $ 607,330 | $ 762,596

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