Asset-Backed Securities Issued - Narrative (Details) $ in Thousands			3 Months Ended			6 Months Ended
	May 01, 2028	Mar. 01, 2028	Jun. 30, 2026 USD ($)		Mar. 31, 2026 USD ($) entity	Jun. 30, 2026 USD ($)		Dec. 31, 2025 USD ($)		Jun. 30, 2025 USD ($)	[2]
Debt Instrument [Line Items]
AFS			$ 287,347			$ 287,347		$ 287,557
Carrying value of collateral			5,393,807			5,393,807		4,878,915
Principal Amount			4,978,435			4,978,435		4,822,478
Real estate owned			134,021		$ 121,167	134,021		124,270
Restricted cash			99,465	[1],[2]		99,465	[1],[2]	193,446	[1]	$ 146,247
Sequoia Re-securitization Trust
Debt Instrument [Line Items]
AFS			165,000			$ 165,000		$ 165,000
Asset-backed securities issued | CAFL 2025-RTL2 Issuer, LP
Debt Instrument [Line Items]
Principal Amount					$ 225,000
CAFL bridge securitization entities | entity					3
Bridge loan					$ 223,000
Real estate owned					38,000
Restricted cash					$ 16,000
VIEs | Asset-backed securities issued
Debt Instrument [Line Items]
Contractual maturities of ABS (in years)						5 years
VIEs | Asset-backed securities issued | CAFL 2025-RTL2 Issuer, LP
Debt Instrument [Line Items]
Debt instrument, interest rate (as a percent)					7.10%
Principal Amount					$ 225,000
Bridge loan					66,000
Real estate owned					$ 19,000
VIEs | Asset-backed securities issued | CAFL 2025-RTL2 Issuer, LP | Beginning in April 2029
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage, increase					0.030
VIEs | Asset-backed securities issued | CAFL 2025-RTL2 Issuer, LP | Beginning in April 2030 through final maturity in March 2036
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage, increase					0.040
VIEs | Sequoia securities
Debt Instrument [Line Items]
Debt instrument, asset backed securities, sold			$ 114,000		$ 136,000
Debt instrument, interest rate (as a percent)			6.40%		6.10%	6.40%
VIEs | Sequoia securities | Sequoia Re-securitization Trust
Debt Instrument [Line Items]
AFS			$ 21,000			$ 21,000
Carrying value of collateral			171,000			171,000
VIEs | Sequoia securities | Sequoia securities
Debt Instrument [Line Items]
Carrying value of collateral			$ 155,000			$ 155,000
VIEs | Sequoia securities | Q2 2025 Subordinate Securities Transfer
Debt Instrument [Line Items]
VIE, ownership interest rate (as a percent)			100.00%		100.00%
VIEs | Sequoia securities | Forecast
Debt Instrument [Line Items]
Increase in interest rate (as a percent)	3.00%	3.00%

[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, 2026 and December 31, 2025, assets of consolidated VIEs totaled $24,372,361 and $18,927,094, respectively. At June 30, 2026 and December 31, 2025, liabilities of consolidated VIEs totaled $22,877,902 and $17,850,175, 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.