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Residential Loans, at Fair Value - Concentration of Risk (Details) - Geographic Concentration Risk | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Residential loans | California |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 22.10% | 21.70%
Residential loans | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 11.40% | 10.40%
Residential loans | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 8.90% | 8.80%
Residential loans | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 8.00% | 7.40%
Residential loans | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 7.20% | 5.90%
Residential loans | Washington |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 5.20% | 4.40%
Residential loans | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 2.60% | 2.70%
Residential loans | Massachusetts |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 2.50% | 4.60%
Consolidated SLST | Consolidated SLST | VIE, Primary Beneficiary | California |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 10.50% | 10.50%
Consolidated SLST | Consolidated SLST | VIE, Primary Beneficiary | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 10.20% | 10.50%
Consolidated SLST | Consolidated SLST | VIE, Primary Beneficiary | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 9.90% | 9.80%
Consolidated SLST | Consolidated SLST | VIE, Primary Beneficiary | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 4.00% | 4.00%
Consolidated SLST | Consolidated SLST | VIE, Primary Beneficiary | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 7.50% | 7.30%
Consolidated SLST | Consolidated SLST | VIE, Primary Beneficiary | Washington |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 1.80% | 1.90%
Consolidated SLST | Consolidated SLST | VIE, Primary Beneficiary | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 7.30% | 7.10%
Consolidated SLST | Consolidated SLST | VIE, Primary Beneficiary | Massachusetts |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 2.60% | 2.70%
Residential loans held in securitization trusts | California |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 22.40% | 22.00%
Residential loans held in securitization trusts | Florida |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 10.40% | 8.90%
Residential loans held in securitization trusts | New York |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 7.80% | 9.20%
Residential loans held in securitization trusts | Texas |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 6.00% | 4.30%
Residential loans held in securitization trusts | New Jersey |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 4.50% | 6.40%
Residential loans held in securitization trusts | Washington |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 3.40% | 3.20%
Residential loans held in securitization trusts | Illinois |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 3.00% | 2.30%
Residential loans held in securitization trusts | Massachusetts |  |
Concentration Risk [Line Items] |  |
Geographic concentration, percent | 5.30% | 5.60%

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