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Residential Whole Loans - Net Gain/(Loss) on Residential Whole Loans Measured at Fair Value (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | $ 54,380 | $ (11,513)
Residential whole loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | 54,380 | (11,513)
Residential whole loans | Business purpose loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | 6,747 | (2,112)
Residential whole loans | Business purpose loans | Single-family transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | (9,149) | 1,292
Residential whole loans | Business purpose loans | Multifamily transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | (1,935) | (2,570)
Residential whole loans | Business purpose loans | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | 17,831 | (834)
Residential whole loans | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | 45,196 | (2,538)
Residential whole loans | Legacy RPL/NPL loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | 949 | (6,301)
Residential whole loans | Other Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net gain/(loss) on residential whole loans measured at fair value through earnings | $ 1,488 | $ (562)

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