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Short-Term Debt - Schedule of Collateral for Short-Term Debt Facilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Short-term Debt [Line Items] |  |
Total Collateral for Short-Term Debt Facilities | $ 1,855,214 | $ 2,299,034
Non-Recourse BPL Financing |  |
Short-term Debt [Line Items] |  |
Total real estate securities owned | 122,111 | 178,070
Restricted cash and other assets | 0 | 1,097
Total Collateral for Short-Term Debt Facilities | 1,439,611 | 2,017,062
Servicer advance financing |  |
Short-term Debt [Line Items] |  |
Cash collateral for borrowed securities | 15,162 | 12,713
Servicer advances | 225,345 | 269,259
Subordinate securities financing |  |
Short-term Debt [Line Items] |  |
Cash collateral for borrowed securities | 175,096 | 0
Residential loans, held-for-sale, at fair value | Non-Recourse BPL Financing |  |
Short-term Debt [Line Items] |  |
Short term debt, restricted | 907,742 | 775,545
Residential MSR warehouse | Non-Recourse BPL Financing |  |
Short-term Debt [Line Items] |  |
Short term debt, restricted | 76,560 | 0
Business purpose loans | Non-Recourse BPL Financing |  |
Short-term Debt [Line Items] |  |
Short term debt, restricted | 95,225 | 871,072
HEI | Non-Recourse BPL Financing |  |
Short-term Debt [Line Items] |  |
Short term debt, restricted | 237,973 | 191,278
On balance sheet | Non-Recourse BPL Financing |  |
Short-term Debt [Line Items] |  |
On balance sheet | 4,460 | 72,133
Sequoia | Sequoia securities | Short Term Borrowing Agreement | Non-Recourse BPL Financing |  |
Short-term Debt [Line Items] |  |
Trading securities pledged as collateral | 52,333 | 74,170
Freddie Mac K-Series | Sequoia securities | Short Term Borrowing Agreement | Non-Recourse BPL Financing |  |
Short-term Debt [Line Items] |  |
Trading securities pledged as collateral | 33,308 | 31,767
Net investments in consolidated CAFL Term entities | Sequoia securities | Short Term Borrowing Agreement |  |
Short-term Debt [Line Items] |  |
Trading securities pledged as collateral | $ 32,010 | $ 0

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