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Residential Loans, at Fair Value - Schedule of Geographic Concentration of Credit Risk (Details) - Geographic Concentration Risk	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Residential loans | California
Concentration Risk [Line Items]
Geographic concentration, percent	26.50%	23.00%
Residential loans | Florida
Concentration Risk [Line Items]
Geographic concentration, percent	13.20%	10.40%
Residential loans | New York
Concentration Risk [Line Items]
Geographic concentration, percent	8.40%	6.60%
Residential loans | New Jersey
Concentration Risk [Line Items]
Geographic concentration, percent	7.80%	8.00%
Residential loans | Texas
Concentration Risk [Line Items]
Geographic concentration, percent	6.50%	6.20%
Residential loans | Illinois
Concentration Risk [Line Items]
Geographic concentration, percent	2.00%	2.20%
Consolidated SLST | VIE, Primary Beneficiary | California
Concentration Risk [Line Items]
Geographic concentration, percent	11.80%	11.70%
Consolidated SLST | VIE, Primary Beneficiary | Florida
Concentration Risk [Line Items]
Geographic concentration, percent	9.10%	9.10%
Consolidated SLST | VIE, Primary Beneficiary | New York
Concentration Risk [Line Items]
Geographic concentration, percent	10.80%	10.80%
Consolidated SLST | VIE, Primary Beneficiary | New Jersey
Concentration Risk [Line Items]
Geographic concentration, percent	6.70%	6.80%
Consolidated SLST | VIE, Primary Beneficiary | Texas
Concentration Risk [Line Items]
Geographic concentration, percent	4.40%	4.40%
Consolidated SLST | VIE, Primary Beneficiary | Illinois
Concentration Risk [Line Items]
Geographic concentration, percent	6.30%	6.30%
Residential loans held in securitization trusts | California
Concentration Risk [Line Items]
Geographic concentration, percent	17.40%	20.20%
Residential loans held in securitization trusts | Florida
Concentration Risk [Line Items]
Geographic concentration, percent	12.00%	12.20%
Residential loans held in securitization trusts | New York
Concentration Risk [Line Items]
Geographic concentration, percent	6.70%	6.60%
Residential loans held in securitization trusts | New Jersey
Concentration Risk [Line Items]
Geographic concentration, percent	5.70%	5.20%
Residential loans held in securitization trusts | Texas
Concentration Risk [Line Items]
Geographic concentration, percent	7.50%	7.90%
Residential loans held in securitization trusts | Illinois
Concentration Risk [Line Items]
Geographic concentration, percent	3.10%	3.10%

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 954
-SubTopic 310
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478785/954-310-50-2

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

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