Home Equity Investments (HEI) - HEI Characteristics (Details) $ in Thousands	Mar. 31, 2023 USD ($) Contract	Dec. 31, 2022 USD ($) Contract
HEIs
Schedule of Equity Method Investments [Line Items]
Number of HEI contracts | Contract	2,695	2,599
Average initial amount of contract | $	$ 101	$ 101
Securitized HEI
Schedule of Equity Method Investments [Line Items]
Number of HEI contracts | Contract	984	1,007
Average initial amount of contract | $	$ 94	$ 94