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	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Proceeds from new transfers	$ 0	$ 1,266,063
MSR fees received	3,069	5,003
Funding of compensating interest, net	(45)	(160)
Cash flows received on retained securities	$ 22,866	$ 47,596