Asset-Backed Securities Issued - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Sep. 30, 2020	Dec. 31, 2052	May 29, 2029	Mar. 31, 2029	Jul. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Sep. 30, 2021
Debt Instrument [Line Items]
Other assets	[1]	$ 232,221						$ 211,240
Restricted cash	[1]	$ 86,037						70,470
Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
VIE, ownership interest rate (as a percent)		80.00%
Variable Interest Entity, Primary Beneficiary | Point HEI
Debt Instrument [Line Items]
ABS issued, net, At amortized cost										$ 146,000
Variable Interest Entity, Primary Beneficiary | CoreVest
Debt Instrument [Line Items]
ABS issued, net, At amortized cost									$ 215,000
Variable Interest Entity, Primary Beneficiary | Freddie Mac SLST
Debt Instrument [Line Items]
ABS issued, net, At amortized cost			$ 210,000
2022 Asset Backed Securities Sold | CoreVest
Debt Instrument [Line Items]
Debt instrument, face amount		$ 215,000
Bridge loan		217,000
Restricted cash		34,000
2022 Asset Backed Securities Sold | Variable Interest Entity, Primary Beneficiary | CoreVest
Debt Instrument [Line Items]
Debt instrument, face amount		220,000
Unamortized debt discount		5,000
Asset-backed securities issued | CoreVest
Debt Instrument [Line Items]
Debt instrument, face amount		485,000						485,000
Bridge loan		269,000
Other assets		14,000
Restricted cash		28,000
Total funding capacity		$ 250,000
Asset-backed securities issued | Freddie Mac SLST
Debt Instrument [Line Items]
Debt instrument, face amount								$ 86,000
Asset-backed securities issued | Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
Debt Instrument interest rate (as a percent)		4.75%
VIE, ownership interest rate (as a percent)			100.00%
Asset-backed securities issued | Variable Interest Entity, Primary Beneficiary | Forecast
Debt Instrument [Line Items]
Debt Instrument interest rate (as a percent)				2.00%		2.00%	7.75%
Asset-backed securities issued | Variable Interest Entity, Primary Beneficiary | CoreVest
Debt Instrument [Line Items]
Debt instrument, face amount		$ 269,000
Unamortized debt discount		$ 1,000
Debt Instrument interest rate (as a percent)		4.32%
Asset-backed securities issued | Contractual maturities of over five years
Debt Instrument [Line Items]
Contractual maturities of securities (in years)		5 years
2021 Asset Backed Securities Sold | CoreVest
Debt Instrument [Line Items]
Debt instrument, face amount		$ 270,000
Total funding capacity		$ 300,000
2021 Asset Backed Securities Sold | Variable Interest Entity, Primary Beneficiary | Forecast
Debt Instrument [Line Items]
Debt Instrument interest rate (as a percent)					2.00%
2021 Asset Backed Securities Sold | Variable Interest Entity, Primary Beneficiary | CoreVest
Debt Instrument [Line Items]
ABS issued, net, At amortized cost										$ 270,000
Debt Instrument interest rate (as a percent)		2.34%

[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 March 31, 2023 and December 31, 2022, assets of consolidated VIEs totaled $9,836,956 and $9,257,291, respectively. At March 31, 2023 and December 31, 2022, liabilities of consolidated VIEs totaled $8,729,585 and $8,270,276, respectively. See Note 4 for further discussion.