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Loans Held for Investment - Percentage of Securitized Loans Held For Investment Carried at Fair Value by Year Originated (Details) - Seasoned Subprime Residential Mortgage Loans - Loans held for investment
Jun. 30, 2026
Dec. 31, 2025
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 100.00% 100.00%
2002 and prior    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 4.80% 4.90%
2003    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 4.40% 4.30%
2004    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 8.00% 8.00%
2005    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 14.10% 14.10%
2006    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 18.10% 18.20%
2007    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 20.50% 21.40%
2008    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 6.70% 6.90%
2009    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 1.60% 1.70%
2010 - 2020    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 6.80% 6.80%
2021    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 2.70% 2.30%
2022    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 7.90% 7.00%
2023 and later    
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]    
Percentage of underlying mortgages, year originated 4.40% 4.40%