Home Equity Investments (HEI) - HEI Characteristics (Details) $ in Thousands	Dec. 31, 2022 USD ($) Contract	Dec. 31, 2021 USD ($) Contract
HEI at Redwood
Schedule of Equity Method Investments [Line Items]
Number of HEI contracts | Contract	2,599	333
Average initial amount of contract | $	$ 101	$ 95
Securitized HEI
Schedule of Equity Method Investments [Line Items]
Number of HEI contracts | Contract	1,007	1,318
Average initial amount of contract | $	$ 94	$ 91