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Residential Loans, at Fair Value - Concentration of Risk (Details) - Geographic Concentration Risk | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Residential loans | California |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 20.50% | 22.40%
Residential loans | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 13.90% | 15.50%
Residential loans | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 9.60% | 7.00%
Residential loans | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 5.80% | 8.10%
Residential loans | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 5.20% | 4.90%
Residential loans | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 3.10% | 3.00%
Consolidated SLST | VIE, Primary Beneficiary | California |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 10.70% | 10.70%
Consolidated SLST | VIE, Primary Beneficiary | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 10.10% | 10.30%
Consolidated SLST | VIE, Primary Beneficiary | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 10.00% | 10.00%
Consolidated SLST | VIE, Primary Beneficiary | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 3.80% | 3.90%
Consolidated SLST | VIE, Primary Beneficiary | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 7.60% | 7.60%
Consolidated SLST | VIE, Primary Beneficiary | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 7.20% | 7.20%
Residential loans held in securitization trusts | California |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 19.20% | 18.40%
Residential loans held in securitization trusts | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 12.80% | 11.00%
Residential loans held in securitization trusts | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 7.30% | 8.50%
Residential loans held in securitization trusts | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 8.70% | 7.10%
Residential loans held in securitization trusts | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 5.70% | 6.00%
Residential loans held in securitization trusts | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 3.40% | 3.50%

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