Home Equity Investments (HEI) - Schedule of Home Equity Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Home equity investments	$ 416,783	$ 403,462
HEIs | Redwood
Schedule of Equity Method Investments [Line Items]
Home equity investments	287,466	270,835
HEIs | HEI held at consolidated HEI securitization entity
Schedule of Equity Method Investments [Line Items]
Home equity investments	$ 129,317	$ 132,627