Commitments and Contingencies (Details)		3 Months Ended			6 Months Ended
		Jun. 30, 2026 USD ($) lease	Mar. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2026 USD ($) lease	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)
Loss Contingencies [Line Items]
Lessee, number of leases | lease		10			10
Present value of remaining lease payments		$ 15,000,000			$ 15,000,000
Operating lease expense					2,000,000	$ 2,000,000
Operating lease liabilities		$ 13,449,000			$ 13,449,000		$ 10,666,000
Operating lease liability, statement of financial position [Extensible List]		Accounts Payable and Accrued Liabilities			Accounts Payable and Accrued Liabilities
Operating lease right-of-use assets		$ 11,950,000			$ 11,950,000		$ 8,902,000
Operating lease right-of-use asset, statement of financial position [Extensible List]		Other assets			Other assets		Other assets
Derivative liabilities	[1]	$ (10,912,000)			$ (10,912,000)		$ (28,150,000)
Gain (loss) on market valuation adjustments					13,152,000	$ (32,865,000)
Aggregate commited capital		180,000,000
CPP Joint Venture, First-Lien Jumbo Residential Mortgage Loans and Related Assets
Loss Contingencies [Line Items]
Amount committed		9,000,000
Capital contribution					0
CPP Joint Venture, Residential Investor Bridge and Term Loans
Loss Contingencies [Line Items]
Amount committed			$ 140,000,000
Capital contribution					56,000,000
Oaktree Joint Venture, Residential Investor Bridge and Term Loans
Loss Contingencies [Line Items]
Amount committed				$ 19,000,000
Capital contribution					6,000,000
Commitment To Fund Residential Investor Bridge Loan
Loss Contingencies [Line Items]
Funding commitment		204,000,000			204,000,000
Derivative liabilities		(20,000.00)			(20,000.00)
Gain (loss) on market valuation adjustments		(20,000.00)			100,000
Commitment To Fund Residential Investor Bridge Loan | Corporate Joint Venture
Loss Contingencies [Line Items]
Funding commitment		81,000,000			81,000,000
Commitment To Fund Residential Bridge Loan
Loss Contingencies [Line Items]
Funding commitment		14,815,000			14,815,000		35,000,000
Payments for other commitments					20,000,000
Other commitment, fair value		$ 300,000			$ 300,000		$ 0

[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.