Principles of Consolidation - Cash Flows Related to Unconsolidated Variable Interest Entity's Sponsored by Redwood (Details) - Variable Interest Entity, Not Primary Beneficiary - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Variable Interest Entity [Line Items]
MSR fees received	$ 664	$ 737	$ 2,020	$ 2,365
Funding of compensating interest, net	(1)	(11)	(3)	(41)
Cash flows received on retained securities	$ 3,254	$ 3,096	$ 8,938	$ 20,380