Asset-Backed Securities Issued - Narrative (Details) - USD ($) $ in Thousands		1 Months Ended						6 Months Ended
		May 31, 2040	Nov. 30, 2031	Apr. 30, 2027	Jan. 31, 2027	Apr. 30, 2025	Feb. 28, 2025	Jun. 30, 2025		Dec. 31, 2024		Jun. 30, 2024	[2]
Debt Instrument [Line Items]
Debt instrument, face amount								$ 3,762,938		$ 3,482,175
Restricted cash								146,247	[1],[2]	67,762	[1]	$ 63,799
Other assets	[1]							448,574		415,717
AFS								114,499		211,474
Carrying value of collateral								3,972,697		3,701,592
Sequoia Re-securitization Trust
Debt Instrument [Line Items]
AFS								$ 106,000		$ 79,000
VIEs
Debt Instrument [Line Items]
VIE, ownership interest rate (as a percent)								80.00%
VIEs | Sequoia Re-securitization Trust
Debt Instrument [Line Items]
AFS								$ 20,000
Asset-backed securities issued | Debt Instrument, Redemption, Period One | CoreVest
Debt Instrument [Line Items]
Debt instrument, face amount								284,000
Bridge loan								215,000
Restricted cash								96,000
Other assets								5,000
Securitized asset backed securities, borrowing capacity								$ 300,000
Re-investment transaction period								24 months
Asset-backed securities issued | VIEs
Debt Instrument [Line Items]
Contractual maturities of ABS (in years)								5 years
Asset-backed securities issued | VIEs | Debt Instrument, Redemption, Period One | CoreVest
Debt Instrument [Line Items]
Debt instrument, face amount								$ 283,000
Debt instrument, interest rate (as a percent)								6.20%
Asset-backed securities issued | VIEs | Forecast | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Increase in interest rate (as a percent)		1.00%	1.50%
Sequoia securities | VIEs
Debt Instrument [Line Items]
Debt instrument, interest rate (as a percent)						8.00%	8.50%
ABS issued, at amortized cost						$ 109,000	$ 100,000
VIE, ownership interest rate (as a percent)							100.00%
Sequoia securities | VIEs | Forecast
Debt Instrument [Line Items]
Increase in interest rate (as a percent)				3.00%	3.00%
Other | VIEs | Sequoia Re-securitization Trust
Debt Instrument [Line Items]
AFS								$ 3,000
Sequoia Securitization Trusts | VIEs
Debt Instrument [Line Items]
Carrying value of collateral								148,000
Sequoia Securitization Trusts | VIEs | Sequoia securities
Debt Instrument [Line Items]
Carrying value of collateral								$ 85,000

[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 June 30, 2025 and December 31, 2024, assets of consolidated VIEs totaled $17,484,443 and $14,654,942, respectively. At June 30, 2025 and December 31, 2024, liabilities of consolidated VIEs totaled $16,386,516 and $13,620,239, respectively. See Note 16 for further discussion.

[2] Restricted cash primarily includes cash held at our consolidated Servicing Investment entities, and cash associated with our risk-sharing transactions, as well as cash collateral for certain consolidated securitization entities.