Concentration of Risk - Summary of Real Estate Owned, Net (Details) - Real Estate Owned, Net - Number of Loans Held in Real Estate Owned - Geographic Concentration	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%
Texas
Concentration Risk [Line Items]
Concentration risk, percentage	25.90%	14.10%
California
Concentration Risk [Line Items]
Concentration risk, percentage	17.50%
New York
Concentration Risk [Line Items]
Concentration risk, percentage	17.00%	5.70%
Florida
Concentration Risk [Line Items]
Concentration risk, percentage	11.40%	16.10%
Georgia
Concentration Risk [Line Items]
Concentration risk, percentage	5.90%
New Jersey
Concentration Risk [Line Items]
Concentration risk, percentage	5.80%	11.20%
Massachusetts
Concentration Risk [Line Items]
Concentration risk, percentage	4.80%	21.30%
Maryland
Concentration Risk [Line Items]
Concentration risk, percentage	1.00%	16.80%
Other states (individually less than 5.0%)
Concentration Risk [Line Items]
Concentration risk, percentage	10.70%	14.80%