Asset-Backed Securities Issued - Schedule of Asset-Backed Securities Issued (Details) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2026 USD ($) entity series	Dec. 31, 2025 USD ($) series entity
Debt Instrument [Line Items]
Carrying Value	[1]	$ 20,417,812	$ 17,492,031
VIEs
Debt Instrument [Line Items]
Number of entities | entity		3
VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Carrying Value		$ 20,417,812	$ 17,492,031
Entity
Debt Instrument [Line Items]
Number of entities | entity		2	2
Total ABS Issued | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		$ 21,081,720	$ 17,963,740
Carrying Value		20,417,812	17,492,031
ABS Issued at Fair Value | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		21,081,720	17,905,309
Carrying Value		20,417,812	17,433,600
Sequoia | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		18,299,729	14,990,305
Carrying Value		$ 17,680,048	$ 14,540,397
Number of Series | series		80	72
Sequoia | Minimum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		2.50%	2.50%
Sequoia | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		8.18%	8.38%
Sequoia Re-Securitization Trusts | Minimum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		6.10%
Sequoia Re-Securitization Trusts | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		8.18%
CAFL | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		$ 2,655,443	$ 2,787,832
Carrying Value		$ 2,610,837	$ 2,765,728
Number of Series | series		21	21
CAFL | Minimum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		3.49%	3.04%
CAFL | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		9.39%	7.89%
HEI | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance		$ 126,548	$ 127,172
Carrying Value		$ 126,927	$ 127,475
Number of Series | series		1	1
HEI | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate		6.72%	6.72%
CAFL ABS at Amortized Cost | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Unpaid Principal Balance			$ 58,431
Carrying Value			$ 58,431
Number of Series | series			2
CAFL ABS at Amortized Cost | Minimum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate			4.31%
CAFL ABS at Amortized Cost | Maximum | VIEs | Collateralized Financing Entities
Debt Instrument [Line Items]
Weighted Average Interest Rate			6.90%

[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, 2026 and December 31, 2025, assets of consolidated VIEs totaled $22,076,415 and $18,927,094, respectively. At March 31, 2026 and December 31, 2025, liabilities of consolidated VIEs totaled $20,784,429 and $17,850,175, respectively. See Note 16 for further discussion.