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Residential Loans, at Fair Value - Geographic Concentrations of Credit Risk (Details) - Geographic Concentration Risk | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Residential loans | California |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 23.00% | 22.40%
Residential loans | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 10.40% | 15.50%
Residential loans | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 8.00% | 4.90%
Residential loans | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 6.60% | 7.00%
Residential loans | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 6.20% | 8.10%
Residential loans | Pennsylvania |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 5.10% | 2.20%
Residential loans | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 2.20% | 3.00%
Consolidated SLST | California |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 11.70% | 10.70%
Consolidated SLST | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 9.10% | 10.30%
Consolidated SLST | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 6.80% | 7.60%
Consolidated SLST | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 10.80% | 10.00%
Consolidated SLST | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 4.40% | 3.90%
Consolidated SLST | Pennsylvania |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 3.90% | 4.10%
Consolidated SLST | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 6.30% | 7.20%
Residential loans held in securitization trusts | California |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 20.20% | 18.40%
Residential loans held in securitization trusts | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 12.20% | 11.00%
Residential loans held in securitization trusts | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 5.20% | 6.00%
Residential loans held in securitization trusts | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 6.60% | 8.50%
Residential loans held in securitization trusts | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 7.90% | 7.10%
Residential loans held in securitization trusts | Pennsylvania |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 3.80% | 4.10%
Residential loans held in securitization trusts | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentrations | 3.10% | 3.50%

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