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Residential Whole Loans - Realized Credit Losses Net of Recoveries (Details) - Residential whole loans - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Realized credit losses, net of recoveries | $ (10,052) | $ (7,084) | $ (23,594) | $ (9,077)
Non-QM loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Realized credit losses, net of recoveries | (80) | 0 | (866) | 88
Business purpose loans | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Realized credit losses, net of recoveries | (7,489) | (669) | (11,833) | (2,123)
Business purpose loans | Single-family transitional loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Realized credit losses, net of recoveries | (946) | (2,393) | (4,469) | (2,012)
Business purpose loans | Multifamily transitional loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Realized credit losses, net of recoveries | (1,353) | (3,802) | (5,602) | (3,910)
Legacy RPL/NPL loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Realized credit losses, net of recoveries | (184) | (220) | (824) | (1,120)
Other loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Realized credit losses, net of recoveries | $ 0 | $ 0 | $ 0 | $ 0

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