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Residential Whole Loans - LTV on Loans (Details) - Residential whole loans $ in Thousands | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
UPB | $ 9,018,124 | $ 9,194,832
Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
UPB | 5,120,904 | 4,408,660
Business purpose loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
UPB | 2,707,998 | 3,500,300
Business purpose loans | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
UPB | 1,267,818 | 1,416,705
Business purpose loans | Single-family transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
UPB | 804,252 | 1,106,631
Business purpose loans | Multifamily transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
UPB | 635,928 | 976,964
Legacy RPL/NPL loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
UPB | 1,128,259 | 1,222,258
Other loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
UPB | 60,963 | 63,614
Financial Asset, Equal to or Greater than 60 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | 552,184 | 615,841
UPB | 616,181 | 687,120
Financial Asset, Equal to or Greater than 60 Days Past Due | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | 205,052 | 166,299
UPB | $ 209,456 | $ 169,459
LTV (as a percent) | 0.64 | 0.66
Financial Asset, Equal to or Greater than 60 Days Past Due | Business purpose loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 147,936 | $ 209,186
UPB | 190,142 | 256,328
Financial Asset, Equal to or Greater than 60 Days Past Due | Business purpose loans | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | 32,964 | 42,995
UPB | $ 40,281 | $ 54,732
LTV (as a percent) | 0.94 | 0.99
Financial Asset, Equal to or Greater than 60 Days Past Due | Business purpose loans | Single-family transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 91,025 | $ 109,221
UPB | $ 103,099 | $ 115,972
LTV (as a percent) | 0.78 | 0.79
Financial Asset, Equal to or Greater than 60 Days Past Due | Business purpose loans | Multifamily transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 23,947 | $ 56,970
UPB | $ 46,762 | $ 85,624
LTV (as a percent) | 0.67 | 0.79
Financial Asset, Equal to or Greater than 60 Days Past Due | Legacy RPL/NPL loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 199,196 | $ 240,356
UPB | $ 216,583 | $ 261,333
LTV (as a percent) | 0.62 | 0.63
Financial Asset, Equal to or Greater than 60 Days Past Due | Other loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 0 | $ 0
UPB | $ 0 | $ 0
LTV (as a percent) | 0 | 0

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