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Residential Whole Loans - Interest Income Components (Details) - Residential whole loans - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | $ 140,951 | $ 154,568 | $ 284,042 | $ 305,878
Non-QM loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 83,019 | 70,267 | 164,558 | 135,531
Business purpose loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 40,741 | 62,781 | 84,259 | 130,950
Business purpose loans | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 18,151 | 21,747 | 37,665 | 44,144
Business purpose loans | Single-family transitional loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 15,817 | 23,726 | 31,371 | 49,544
Business purpose loans | Multifamily transitional loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 6,773 | 17,308 | 15,223 | 37,262
Seasoned RPL/NPL loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 16,748 | 21,076 | 34,319 | 38,455
Other loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 443 | 444 | 906 | 942
Held at Carrying Value |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 15,287 | 20,498 | 31,456 | 41,238
Held at Carrying Value | Non-QM loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 7,536 | 9,334 | 15,721 | 19,420
Held at Carrying Value | Business purpose loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 1,304 | 3,908 | 2,879 | 7,521
Held at Carrying Value | Business purpose loans | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 1,063 | 1,794 | 2,698 | 3,693
Held at Carrying Value | Business purpose loans | Single-family transitional loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 241 | 2,114 |  | 3,828
Interest income |  |  | 181 |
Held at Carrying Value | Business purpose loans | Multifamily transitional loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 0 | 0 | 0 | 0
Held at Carrying Value | Seasoned RPL/NPL loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 6,447 | 7,256 | 12,856 | 14,297
Held at Carrying Value | Other loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 0 | 0 | 0 | 0
Held at Fair Value |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 125,664 | 134,070 | 252,586 | 264,640
Held at Fair Value | Non-QM loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 75,483 | 60,933 | 148,837 | 116,111
Held at Fair Value | Business purpose loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 39,437 | 58,873 | 81,380 | 123,429
Held at Fair Value | Business purpose loans | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 17,088 | 19,953 | 34,967 | 40,451
Held at Fair Value | Business purpose loans | Single-family transitional loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 15,576 | 21,612 | 31,190 | 45,716
Held at Fair Value | Business purpose loans | Multifamily transitional loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 6,773 | 17,308 | 15,223 | 37,262
Held at Fair Value | Seasoned RPL/NPL loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | 10,301 | 13,820 | 21,463 | 24,158
Held at Fair Value | Other loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Interest income | $ 443 | $ 444 | $ 906 | $ 942

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