Mortgage-Backed Securities - Loan Products Type and Characteristics (Details) - Non-Agency RMBS	Mar. 31, 2025	Dec. 31, 2024
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
% of Unpaid Principal Balance	13.00%	13.20%
Bankruptcy
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
% of Unpaid Principal Balance	1.30%	1.40%
Foreclosure
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
% of Unpaid Principal Balance	3.10%	2.90%
REO
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
% of Unpaid Principal Balance	0.60%	0.60%
30 Days Delinquent
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
% of Unpaid Principal Balance	4.10%	4.30%
60 Days Delinquent
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
% of Unpaid Principal Balance	1.50%	1.50%
90+ Days Delinquent
Securitized Loans Held For Investment By Consolidated Variable Interest Entities [Line Items]
% of Unpaid Principal Balance	2.50%	2.50%