Expected Loss to be Paid (Recovered) - Liquidation Rates and Key Assumptions in Base Scenario Expected Loss First Lien RMBS (Details) - First Lien - RMBS	Mar. 31, 2024	Dec. 31, 2023
Current but recently delinquent
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	20.00%	20.00%
30 – 59 Days Delinquent | Minimum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	30.00%	30.00%
30 – 59 Days Delinquent | Maximum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	35.00%	35.00%
60 – 89 Days Delinquent | Minimum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	40.00%	40.00%
60 – 89 Days Delinquent | Maximum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	45.00%	45.00%
90+ Days Delinquent | Minimum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	45.00%	45.00%
90+ Days Delinquent | Maximum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	60.00%	60.00%
Bankruptcy | Minimum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	40.00%	40.00%
Bankruptcy | Maximum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	50.00%	50.00%
Foreclosure | Minimum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	55.00%	55.00%
Foreclosure | Maximum
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	65.00%	65.00%
Real Estate Owned
Schedule of Expected Losses to be Paid [Line Items]
Liquidation rate	100.00%	100.00%