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Residential Loans and Residential Loans Held for Sale, at Fair Value - Schedule of Geographic Concentration of Credit Risk of Residential Loans (Details) - Residential loans held for sale - Geographic Concentration Risk
9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
New Jersey    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Geographic concentration, percent 12.20% 9.20%
Pennsylvania    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Geographic concentration, percent 11.90% 7.20%
Ohio    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Geographic concentration, percent 9.70% 13.80%
Texas    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Geographic concentration, percent 7.70% 8.90%
New York    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Geographic concentration, percent 6.30% 11.90%
Michigan    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Geographic concentration, percent 5.10% 3.50%