Home Equity Investments (HEI) - Schedule of Activity of HEI (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Fair value of HEI purchased and originated (1)
Schedule of Equity Method Investments [Line Items]
Net market valuation gains (losses)		$ 0	$ 0
Fair value of HEI purchased and originated (1) | Redwood
Schedule of Equity Method Investments [Line Items]
Net market valuation gains (losses)		136,445	248,218
Fair value of HEI transferred
Schedule of Equity Method Investments [Line Items]
Net market valuation gains (losses)	$ 111,000	173,207	0
Fair value of HEI transferred | Redwood
Schedule of Equity Method Investments [Line Items]
Net market valuation gains (losses)		$ (173,207)	$ 0