Asset-Backed Securities Issued - Schedule of Asset-Backed Securities Issued (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2025 USD ($) series entity	Dec. 31, 2024 USD ($) series entity
Debt Instrument [Line Items]
Carrying Value	[1]	$ 17,492,031	$ 13,270,204
VIEs
Debt Instrument [Line Items]
Number of entities | entity		3
VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Carrying Value		$ 17,492,031	$ 13,270,204
Entity
Debt Instrument [Line Items]
Number of entities | entity			1
Total ABS Issued | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		17,963,740	$ 14,047,261
Carrying Value		17,492,031	13,270,204
ABS Issued at Fair Value | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		17,905,309	13,654,309
Carrying Value		17,433,600	12,879,530
Securitized Loans | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		14,990,305	9,220,157
Carrying Value		$ 14,540,397	$ 8,585,077
Number of Series | series		72	54
Securitized Loans | Minimum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		2.50%	2.66%
Securitized Loans | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		8.38%	8.52%
CAFL Securitization Entities | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		$ 2,787,832	$ 2,752,657
Carrying Value		$ 2,765,728	$ 2,687,977
Number of Series | series		21	19
CAFL Securitization Entities | Minimum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		3.04%	2.76%
CAFL Securitization Entities | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		7.89%	7.89%
Freddie Mac SLST Securitization Entities | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance			$ 1,075,249
Carrying Value			$ 1,005,945
Weighted Average Interest Rate			3.50%
Number of Series | series			2
Freddie Mac K-Series Securitization Entities | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance			$ 393,762
Carrying Value			$ 389,434
Weighted Average Interest Rate			3.41%
Number of Series | series			1
Point HEI | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		$ 127,172	$ 212,484
Carrying Value		$ 127,475	$ 211,097
Number of Series | series		1	2
Point HEI | Minimum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate			3.96%
Point HEI | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		6.72%	6.71%
Asset Backed Securities Issued At Amortized Cost | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance			$ 392,952
Carrying Value			390,674
CAFL ABS at Amortized Cost | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		$ 58,431	244,772
Carrying Value		$ 58,431	$ 244,772
Number of Series | series		2	2
CAFL ABS at Amortized Cost | Minimum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		4.31%	2.31%
CAFL ABS at Amortized Cost | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		6.90%	4.38%
Freddie Mac SLST | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance			$ 148,180
Carrying Value			$ 145,902
Weighted Average Interest Rate			7.50%
Number of Series | series			1
Freddie Mac SLST | Variable Interest Entity, Not Primary Beneficiary | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		$ 125,000

[1] Our consolidated balance sheets include assets of 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, 2025 and 2024, assets of consolidated VIEs totaled $18,927,094 and $14,654,942, respectively. At December 31, 2025 and 2024, liabilities of consolidated VIEs totaled $17,850,175 and $13,620,239, respectively. See Note 15 for further discussion.