Fair Value of Financial Instruments - Schedule of Fair Value Methodology for Level 3 Financial Instruments (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2025 USD ($) $ / loan securitization		Dec. 31, 2025 USD ($) $ / loan tranche		Dec. 31, 2024 USD ($)		Dec. 31, 2023 USD ($)
Assets
Home appreciation options | $		$ 329,883		$ 329,883		$ 589,785
Strategic investments | $		6,310		6,310		3,460
Total Assets | $		23,701,114	[1]	23,701,114	[1]	18,258,344	[1]	$ 14,504,327
Liabilities
Non-controlling interests | $		92,644		92,644		99,510
Total liabilities | $	[1]	$ 22,718,498		22,718,498		17,070,481
Securitization entity | securitization		4
Payable to non-controlling interests | $		$ 120,177		120,177		123,258
VIEs
Assets
Total Assets | $		18,927,094		18,927,094		14,654,942
Liabilities
Total liabilities | $		17,850,175		17,850,175		13,620,239
VIEs | Collateralized Financing Entities
Assets
Total Assets | $		18,927,094		18,927,094		14,654,942
Liabilities
Total liabilities | $		17,850,175		17,850,175		13,620,239
Level 3
Assets
Home appreciation options | $		329,883		329,883		589,785
Strategic investments | $		6,310		6,310		3,460
Total Assets | $		22,616,293		22,616,293
Liabilities
Non-controlling interests | $		92,644		92,644		99,510
Total liabilities | $		17,526,244		17,526,244
Level 3 | ABS Issued
Liabilities
ABS issued | $		17,433,600		17,433,600
Level 3 | Noncontrolling Interest
Liabilities
Non-controlling interests | $		$ 92,644		$ 92,644
Level 3 | Minimum | Whole loan discount rate | ABS Issued
Liabilities
ABS issued, measurement input		0		0
Level 3 | Minimum | Whole loan discount rate | Noncontrolling Interest
Liabilities
Non-controlling interest, measurement input		0.12		0.12
Level 3 | Minimum | Prepayment rate (Annual CPR) | ABS Issued
Liabilities
ABS issued, measurement input		0		0
Level 3 | Minimum | Default rate | ABS Issued
Liabilities
ABS issued, measurement input		0		0
Level 3 | Minimum | Loss severity | ABS Issued
Liabilities
ABS issued, measurement input		0		0
Level 3 | Maximum | Whole loan discount rate | ABS Issued
Liabilities
ABS issued, measurement input		0.28		0.28
Level 3 | Maximum | Whole loan discount rate | Noncontrolling Interest
Liabilities
Non-controlling interest, measurement input		0.15		0.15
Level 3 | Maximum | Prepayment rate (Annual CPR) | ABS Issued
Liabilities
ABS issued, measurement input		0.69		0.69
Level 3 | Maximum | Default rate | ABS Issued
Liabilities
ABS issued, measurement input		0.10		0.10
Level 3 | Maximum | Loss severity | ABS Issued
Liabilities
ABS issued, measurement input		0.50		0.50
Level 3 | Weighted Average | Whole loan discount rate | ABS Issued
Liabilities
ABS issued, measurement input		0		0
Level 3 | Weighted Average | Whole loan discount rate | Noncontrolling Interest
Liabilities
Non-controlling interest, measurement input		0.14		0.14
Level 3 | Weighted Average | Prepayment rate (Annual CPR) | ABS Issued
Liabilities
ABS issued, measurement input		0.10		0.10
Level 3 | Weighted Average | Default rate | ABS Issued
Liabilities
ABS issued, measurement input		0		0
Level 3 | Weighted Average | Loss severity | ABS Issued
Liabilities
ABS issued, measurement input		0.01		0.01
Residential Consumer Loans | Level 3
Assets
Loans receivable, fair value | $		$ 17,935,761		$ 17,935,761
Residential Consumer Loans | Level 3 | Minimum | Senior credit spread to TBA price
Assets
Loans held-for-sale, measurement input		0.88		0.88
Residential Consumer Loans | Level 3 | Minimum | Senior credit spread to Swap rate
Assets
Loans held-for-sale, measurement input		0.0140		0.0140
Residential Consumer Loans | Level 3 | Minimum | Subordinate credit spread to Swap rate
Assets
Loans held-for-sale, measurement input		0.0150		0.0150
Residential Consumer Loans | Level 3 | Minimum | Senior credit support
Assets
Loan purchase commitments, net, measurement inputs		0.07		0.07
Residential Consumer Loans | Level 3 | Minimum | IO discount rate
Assets
Loans receivable, measurement input		0.20		0.20
Residential Consumer Loans | Level 3 | Minimum | Liability price
Assets
Loans receivable, measurement input		19		19
Residential Consumer Loans | Level 3 | Maximum | Senior credit spread to TBA price
Assets
Loans held-for-sale, measurement input		1.88		1.88
Residential Consumer Loans | Level 3 | Maximum | Senior credit spread to Swap rate
Assets
Loans held-for-sale, measurement input		0.0222		0.0222
Residential Consumer Loans | Level 3 | Maximum | Subordinate credit spread to Swap rate
Assets
Loans held-for-sale, measurement input		0.0675		0.0675
Residential Consumer Loans | Level 3 | Maximum | Senior credit support
Assets
Loan purchase commitments, net, measurement inputs		0.13		0.13
Residential Consumer Loans | Level 3 | Maximum | IO discount rate
Assets
Loans receivable, measurement input		0.23		0.23
Residential Consumer Loans | Level 3 | Maximum | Liability price
Assets
Loans receivable, measurement input		105		105
Residential Consumer Loans | Level 3 | Weighted Average | Senior credit spread to TBA price
Assets
Loans held-for-sale, measurement input		1.01		1.01
Residential Consumer Loans | Level 3 | Weighted Average | Senior credit spread to Swap rate
Assets
Loans held-for-sale, measurement input		0.0210		0.0210
Residential Consumer Loans | Level 3 | Weighted Average | Subordinate credit spread to Swap rate
Assets
Loans held-for-sale, measurement input		0.0236		0.0236
Residential Consumer Loans | Level 3 | Weighted Average | Senior credit support
Assets
Loan purchase commitments, net, measurement inputs		0.07		0.07
Residential Consumer Loans | Level 3 | Weighted Average | IO discount rate
Assets
Loans receivable, measurement input		0.21		0.21
Residential Consumer Loans | Level 3 | Weighted Average | Liability price
Assets
Loans receivable, measurement input		99		99
Residential Investor Term Loans | Level 3
Assets
Loans receivable, fair value | $		$ 2,188,331		$ 2,188,331
Residential Investor Term Loans | Level 3 | Minimum | Liability price
Assets
Loans receivable, measurement input		92		92
Residential Investor Term Loans | Level 3 | Minimum | Whole loan spread
Assets
Loans held-for-investment, measurement input		0.0230		0.0230
Residential Investor Term Loans | Level 3 | Maximum | Liability price
Assets
Loans receivable, measurement input		103		103
Residential Investor Term Loans | Level 3 | Maximum | Whole loan spread
Assets
Loans held-for-investment, measurement input		0.0230		0.0230
Residential Investor Term Loans | Level 3 | Weighted Average | Liability price
Assets
Loans receivable, measurement input		95		95
Residential Investor Term Loans | Level 3 | Weighted Average | Whole loan spread
Assets
Loans held-for-investment, measurement input		0.0230		0.0230
Residential investor bridge loans | Level 3
Assets
Loans receivable, fair value | $		$ 1,413,919		$ 1,413,919
Residential investor bridge loans | Level 3 | Minimum | Liability price
Assets
Loans receivable, measurement input		97		97
Residential investor bridge loans | Level 3 | Minimum | Whole loan discount rate
Assets
Loans held-for-investment, measurement input		0.07		0.07
Residential investor bridge loans | Level 3 | Minimum | Dollar price of loans
Assets
Loans held-for-investment, measurement input		30		30
Residential investor bridge loans | Level 3 | Maximum | Liability price
Assets
Loans receivable, measurement input		163		163
Residential investor bridge loans | Level 3 | Maximum | Whole loan discount rate
Assets
Loans held-for-investment, measurement input		0.09		0.09
Residential investor bridge loans | Level 3 | Maximum | Dollar price of loans
Assets
Loans held-for-investment, measurement input		101		101
Residential investor bridge loans | Level 3 | Weighted Average | Liability price
Assets
Loans receivable, measurement input		138		138
Residential investor bridge loans | Level 3 | Weighted Average | Whole loan discount rate
Assets
Loans held-for-investment, measurement input		0.08		0.08
Residential investor bridge loans | Level 3 | Weighted Average | Dollar price of loans
Assets
Loans held-for-investment, measurement input		74		74
HEI | VIEs | Collateralized Financing Entities | HEI
Liabilities
Fair value of securities owned | $		$ 25,000		$ 25,000
HEI | Level 3
Assets
Home appreciation options | $		$ 329,883		$ 329,883
HEI | Level 3 | Minimum | Liability price
Assets
Loans receivable, measurement input		151		151
HEI | Level 3 | Minimum | Whole loan discount rate
Assets
HEI		0.09		0.09
HEI | Level 3 | Minimum | Prepayment rate (Annual CPR)
Assets
HEI		0.08		0.08
HEI | Level 3 | Minimum | Home price appreciation (depreciation)
Assets
HEI		0.04		0.04
HEI | Level 3 | Maximum | Liability price
Assets
Loans receivable, measurement input		151		151
HEI | Level 3 | Maximum | Whole loan discount rate
Assets
HEI		0.09		0.09
HEI | Level 3 | Maximum | Prepayment rate (Annual CPR)
Assets
HEI		0.15		0.15
HEI | Level 3 | Maximum | Home price appreciation (depreciation)
Assets
HEI		0.04		0.04
HEI | Level 3 | Weighted Average | Liability price
Assets
Loans receivable, measurement input		151		151
HEI | Level 3 | Weighted Average | Whole loan discount rate
Assets
HEI		0.09		0.09
HEI | Level 3 | Weighted Average | Prepayment rate (Annual CPR)
Assets
HEI		0.14		0.14
HEI | Level 3 | Weighted Average | Home price appreciation (depreciation)
Assets
HEI		0.04		0.04
Real estate securities - trading and AFS securities | Level 3
Assets
Real estate securities - trading and AFS securities | $		$ 423,016		$ 423,016
Real estate securities - trading and AFS securities | Level 3 | Minimum | Whole loan discount rate
Assets
Trading and AFS securities		0		0
Real estate securities - trading and AFS securities | Level 3 | Minimum | Prepayment rate (Annual CPR)
Assets
Trading and AFS securities		0		0
Real estate securities - trading and AFS securities | Level 3 | Minimum | Default rate
Assets
Trading and AFS securities		0		0
Real estate securities - trading and AFS securities | Level 3 | Minimum | Loss severity
Assets
Trading and AFS securities		0		0
Real estate securities - trading and AFS securities | Level 3 | Maximum | Whole loan discount rate
Assets
Trading and AFS securities		0.22		0.22
Real estate securities - trading and AFS securities | Level 3 | Maximum | Prepayment rate (Annual CPR)
Assets
Trading and AFS securities		0.35		0.35
Real estate securities - trading and AFS securities | Level 3 | Maximum | Default rate
Assets
Trading and AFS securities		0.81		0.81
Real estate securities - trading and AFS securities | Level 3 | Maximum | Loss severity
Assets
Trading and AFS securities		0.40		0.40
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Whole loan discount rate
Assets
Trading and AFS securities		0.07		0.07
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Prepayment rate (Annual CPR)
Assets
Trading and AFS securities		0.06		0.06
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Default rate
Assets
Trading and AFS securities		0.46		0.46
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Loss severity
Assets
Trading and AFS securities		0.17		0.17
Servicing Investments | Level 3
Assets
Servicing investments | $		$ 302,230		$ 302,230
Servicing Investments | Level 3 | Minimum | Whole loan discount rate
Assets
Servicing asset, measurement input		0.08		0.08
Servicing Investments | Level 3 | Minimum | Prepayment rate (Annual CPR)
Assets
Servicing asset, measurement input		0.02		0.02
Servicing Investments | Level 3 | Minimum | Prepayment yield (Annual CPY)
Assets
Servicing asset, measurement input		0.50		0.50
Servicing Investments | Level 3 | Maximum | Whole loan discount rate
Assets
Servicing asset, measurement input		0.12		0.12
Servicing Investments | Level 3 | Maximum | Prepayment rate (Annual CPR)
Assets
Servicing asset, measurement input		0.29		0.29
Servicing Investments | Level 3 | Maximum | Prepayment yield (Annual CPY)
Assets
Servicing asset, measurement input		1		1
Servicing Investments | Level 3 | Weighted Average | Whole loan discount rate
Assets
Servicing asset, measurement input		0.11		0.11
Servicing Investments | Level 3 | Weighted Average | Prepayment rate (Annual CPR)
Assets
Servicing asset, measurement input		0.09		0.09
Servicing Investments | Level 3 | Weighted Average | Prepayment yield (Annual CPY)
Assets
Servicing asset, measurement input		0.76		0.76
Derivative assets, net | Level 3
Assets
Derivative assets, net | $		$ 16,843		$ 16,843
Derivative assets, net | Level 3 | Minimum | Senior credit spread to TBA price
Assets
Derivative assets, net measurement input		0.88		0.88
Derivative assets, net | Level 3 | Minimum | Senior credit spread to Swap rate
Assets
Derivative assets, net measurement input		0.0140		0.0140
Derivative assets, net | Level 3 | Minimum | Subordinate credit spread to Swap rate
Assets
Derivative assets, net measurement input		0.0150		0.0150
Derivative assets, net | Level 3 | Minimum | Senior credit support
Assets
Derivative assets, net measurement input		0.07		0.07
Derivative assets, net | Level 3 | Minimum | IO discount rate
Assets
Derivative assets, net measurement input		0.15		0.15
Derivative assets, net | Level 3 | Minimum | Pull-through rate
Assets
Derivative assets, net measurement input		0.02		0.02
Derivative assets, net | Level 3 | Maximum | Senior credit spread to TBA price
Assets
Derivative assets, net measurement input		1.88		1.88
Derivative assets, net | Level 3 | Maximum | Senior credit spread to Swap rate
Assets
Derivative assets, net measurement input		0.0222		0.0222
Derivative assets, net | Level 3 | Maximum | Subordinate credit spread to Swap rate
Assets
Derivative assets, net measurement input		0.0725		0.0725
Derivative assets, net | Level 3 | Maximum | Senior credit support
Assets
Derivative assets, net measurement input		0.13		0.13
Derivative assets, net | Level 3 | Maximum | IO discount rate
Assets
Derivative assets, net measurement input		0.23		0.23
Derivative assets, net | Level 3 | Maximum | Pull-through rate
Assets
Derivative assets, net measurement input		1		1
Derivative assets, net | Level 3 | Weighted Average | Senior credit spread to TBA price
Assets
Derivative assets, net measurement input		1.01		1.01
Derivative assets, net | Level 3 | Weighted Average | Senior credit spread to Swap rate
Assets
Derivative assets, net measurement input		0.0201		0.0201
Derivative assets, net | Level 3 | Weighted Average | Subordinate credit spread to Swap rate
Assets
Derivative assets, net measurement input		0.0273		0.0273
Derivative assets, net | Level 3 | Weighted Average | Senior credit support
Assets
Derivative assets, net measurement input		0.08		0.08
Derivative assets, net | Level 3 | Weighted Average | IO discount rate
Assets
Derivative assets, net measurement input		0.19		0.19
Derivative assets, net | Level 3 | Weighted Average | Pull-through rate
Assets
Derivative assets, net measurement input		0.67		0.67
Strategic investments | Level 3
Assets
Strategic investments | $		$ 6,310		$ 6,310
Strategic investments | Level 3 | Minimum | Transaction Price
Assets
Strategic investments, measurement input		200		200
Strategic investments | Level 3 | Maximum | Transaction Price
Assets
Strategic investments, measurement input		3,000		3,000
Strategic investments | Level 3 | Weighted Average | Transaction Price
Assets
Strategic investments, measurement input		789		789
Sequoia
Liabilities
Fair value of securities owned | $		$ 722,000		$ 722,000
CAFL Securitization Entities
Liabilities
Fair value of securities owned | $		$ 330,000		$ 330,000		326,000
Securitization entity		2		2
CAFL Bridge Loan Securitization
Liabilities
Fair value of securities owned | $		$ 50,000		$ 50,000		$ 29,000

[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.