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Residential Whole Loans - Realized Credit Losses Net of Recoveries (Details) - Residential whole loans - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Realized credit losses, net of recoveries | $ (3,731) | $ (642)
Business purpose loans | Single-family transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Realized credit losses, net of recoveries | (2,173) | 653
Business purpose loans | Multifamily transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Realized credit losses, net of recoveries | (169) | (28)
Business purpose loans | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Realized credit losses, net of recoveries | (1,196) | (887)
Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Realized credit losses, net of recoveries | (137) | 1
Legacy RPL/NPL loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Realized credit losses, net of recoveries | (56) | (381)
Other Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Realized credit losses, net of recoveries | $ 0 | $ 0

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