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Home Equity Investments (HEI) - Schedule of Home Equity Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]    
Home equity investments $ 340,437 $ 192,740
HEIs at Redwood | Redwood    
Schedule of Equity Method Investments [Line Items]    
Home equity investments 200,709 33,187
HEIs at Redwood | HEIs held at consolidated HEI securitization entity    
Schedule of Equity Method Investments [Line Items]    
Home equity investments $ 139,728 $ 159,553