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
	Mar. 31, 2023	Mar. 31, 2022
Variable Interest Entity [Line Items]
MSR fees received	$ 684	$ 864
Funding of compensating interest, net	(1)	(16)
Cash flows received on retained securities	$ 2,963	$ 14,126