Fair Value of Financial Instruments - Additional Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	[1]	$ 390,938	$ 449,229
Carrying Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments		6,155	12,663
Securities
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value option elected aggregate carrying amount, asset		5,000	59,000
Residential Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value option elected aggregate carrying amount, asset		3,700,000	12,920,000
Business purpose residential loans, held-for-sale, at fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value option elected aggregate carrying amount, asset		2,900,000	2,220,000
Acquisitions		181,814	136,685
HEIs
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisitions		248,218	155,023
MSRs
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisitions			$ 15,000
Excess MSRs
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value option elected aggregate carrying amount, asset		$ 5,000

[1] Our consolidated balance sheets include assets of consolidated variable interest entities (“VIEs”) that can only be used to settle obligations of these VIEs and liabilities of consolidated VIEs for which creditors do not have recourse to Redwood Trust, Inc. or its affiliates. At December 31, 2022 and 2021, assets of consolidated VIEs totaled $9,257,291 and $10,661,081, respectively. At December 31, 2022 and 2021, liabilities of consolidated VIEs totaled $8,270,276 and $9,619,347, respectively. See Note 4 for further discussion.