Fair Value of Financial Instruments - Schedule of Fair Value Methodology for Level 3 Financial Instruments (Details) $ in Thousands		6 Months Ended		12 Months Ended
		Jun. 30, 2026 USD ($) $ / loan securitization		Dec. 31, 2025 USD ($) tranche		Jun. 30, 2025 USD ($)
On-balance sheet assets, at fair value:
Home appreciation options | $		$ 339,735		$ 329,883
Strategic investments | $		10,123		6,310
Total Assets | $		28,818,131	[1]	23,701,114	[1]	$ 21,333,020
Liabilities
Non-controlling interests | $		92,631		92,644
Derivatives, net | $		(48,524)		(77,447)
Total liabilities | $	[1]	$ 27,884,292		22,718,498
Securitization entity | securitization		4
Payable to non-controlling interests | $		$ 119,020		120,177
VIEs
On-balance sheet assets, at fair value:
Total Assets | $		24,372,361		18,927,094
Liabilities
Total liabilities | $		22,877,902		17,850,175
Collateralized Financing Entities | VIEs
On-balance sheet assets, at fair value:
Total Assets | $		24,372,361		18,927,094
Liabilities
Total liabilities | $		22,877,902		17,850,175
Collateralized Financing Entities | HEI | VIEs
On-balance sheet assets, at fair value:
Total Assets | $		199,681		197,118
Liabilities
Total liabilities | $		172,877		171,660
Level 3
On-balance sheet assets, at fair value:
Home appreciation options | $		339,735		329,883
Strategic investments | $		10,123		6,310
Total Assets | $		27,886,980
Liabilities
Non-controlling interests | $		92,631		92,644
Total liabilities | $		22,608,538
Level 3 | ABS Issued
Liabilities
ABS issued | $		22,515,907
Level 3 | Noncontrolling Interest
Liabilities
Non-controlling interests | $		$ 92,631
Level 3 | Minimum | Whole loan discount rate | ABS Issued
Liabilities
ABS issued, measurement input		0
Level 3 | Minimum | Whole loan discount rate | Noncontrolling Interest
Liabilities
Non-controlling interest, measurement input		0.12
Level 3 | Minimum | Default rate | ABS Issued
Liabilities
ABS issued, measurement input		0
Level 3 | Minimum | Loss severity | ABS Issued
Liabilities
ABS issued, measurement input		0
Level 3 | Minimum | Prepayment yield (Annual CPY) | ABS Issued
Liabilities
ABS issued, measurement input		0
Level 3 | Maximum | Whole loan discount rate | ABS Issued
Liabilities
ABS issued, measurement input		0.22
Level 3 | Maximum | Whole loan discount rate | Noncontrolling Interest
Liabilities
Non-controlling interest, measurement input		0.15
Level 3 | Maximum | Default rate | ABS Issued
Liabilities
ABS issued, measurement input		0.21
Level 3 | Maximum | Loss severity | ABS Issued
Liabilities
ABS issued, measurement input		0.50
Level 3 | Maximum | Prepayment yield (Annual CPY) | ABS Issued
Liabilities
ABS issued, measurement input		0.53
Level 3 | Weighted Average | Whole loan discount rate | ABS Issued
Liabilities
ABS issued, measurement input		0.01
Level 3 | Weighted Average | Whole loan discount rate | Noncontrolling Interest
Liabilities
Non-controlling interest, measurement input		0.13
Level 3 | Weighted Average | Default rate | ABS Issued
Liabilities
ABS issued, measurement input		0
Level 3 | Weighted Average | Loss severity | ABS Issued
Liabilities
ABS issued, measurement input		0.01
Level 3 | Weighted Average | Prepayment yield (Annual CPY) | ABS Issued
Liabilities
ABS issued, measurement input		0.13
Residential consumer loans | Level 3
On-balance sheet assets, at fair value:
Loans receivable, fair value | $		$ 23,638,696
Residential consumer loans | Level 3 | Minimum | Senior credit spread to TBA price
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.63
Residential consumer loans | Level 3 | Minimum | Senior credit spread to Treasury Curve
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0125
Residential consumer loans | Level 3 | Minimum | Subordinate credit spread to Treasury Curve
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0145
Residential consumer loans | Level 3 | Minimum | Senior credit support
On-balance sheet assets, at fair value:
Loan purchase commitments, measurement input		0.07
Residential consumer loans | Level 3 | Minimum | IO discount rate
On-balance sheet assets, at fair value:
Loans receivable, measurement input		0.10
Residential consumer loans | Level 3 | Minimum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		24
Residential consumer loans | Level 3 | Maximum | Senior credit spread to TBA price
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		1.44
Residential consumer loans | Level 3 | Maximum | Senior credit spread to Treasury Curve
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0200
Residential consumer loans | Level 3 | Maximum | Subordinate credit spread to Treasury Curve
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0675
Residential consumer loans | Level 3 | Maximum | Senior credit support
On-balance sheet assets, at fair value:
Loan purchase commitments, measurement input		0.20
Residential consumer loans | Level 3 | Maximum | IO discount rate
On-balance sheet assets, at fair value:
Loans receivable, measurement input		0.20
Residential consumer loans | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		105
Residential consumer loans | Level 3 | Weighted Average | Senior credit spread to TBA price
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.95
Residential consumer loans | Level 3 | Weighted Average | Senior credit spread to Treasury Curve
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0139
Residential consumer loans | Level 3 | Weighted Average | Subordinate credit spread to Treasury Curve
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0262
Residential consumer loans | Level 3 | Weighted Average | Senior credit support
On-balance sheet assets, at fair value:
Loan purchase commitments, measurement input		0.10
Residential consumer loans | Level 3 | Weighted Average | IO discount rate
On-balance sheet assets, at fair value:
Loans receivable, measurement input		0.16
Residential consumer loans | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		100
Residential investor term loans | Level 3
On-balance sheet assets, at fair value:
Loans receivable, fair value | $		$ 1,796,137
Residential investor term loans | Level 3 | Minimum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		89
Residential investor term loans | Level 3 | Minimum | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0220
Residential investor term loans | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		99
Residential investor term loans | Level 3 | Maximum | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0220
Residential investor term loans | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		93
Residential investor term loans | Level 3 | Weighted Average | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0220
Residential investor bridge loans | Level 3
On-balance sheet assets, at fair value:
Loans receivable, fair value | $		$ 1,315,469
Residential investor bridge loans | Level 3 | Minimum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		69
Residential investor bridge loans | Level 3 | Minimum | Whole loan discount rate
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.07
Residential investor bridge loans | Level 3 | Minimum | Dollar price of loans
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		21
Residential investor bridge loans | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		158
Residential investor bridge loans | Level 3 | Maximum | Whole loan discount rate
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.12
Residential investor bridge loans | Level 3 | Maximum | Dollar price of loans
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		105
Residential investor bridge loans | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		100
Residential investor bridge loans | Level 3 | Weighted Average | Whole loan discount rate
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.07
Residential investor bridge loans | Level 3 | Weighted Average | Dollar price of loans
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		86
HEI | Collateralized Financing Entities | HEI | VIEs
Liabilities
Fair value of securities owned | $		$ 27,000
HEI | Level 3
On-balance sheet assets, at fair value:
Home appreciation options | $		$ 339,735
HEI | Level 3 | Minimum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		158
HEI | Level 3 | Minimum | Whole loan discount rate
On-balance sheet assets, at fair value:
HEI		0.08
HEI | Level 3 | Minimum | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
HEI		0.08
HEI | Level 3 | Minimum | Home price appreciation (depreciation)
On-balance sheet assets, at fair value:
HEI		0.04
HEI | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		158
HEI | Level 3 | Maximum | Whole loan discount rate
On-balance sheet assets, at fair value:
HEI		0.08
HEI | Level 3 | Maximum | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
HEI		0.15
HEI | Level 3 | Maximum | Home price appreciation (depreciation)
On-balance sheet assets, at fair value:
HEI		0.04
HEI | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		158
HEI | Level 3 | Weighted Average | Whole loan discount rate
On-balance sheet assets, at fair value:
HEI		0.08
HEI | Level 3 | Weighted Average | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
HEI		0.14
HEI | Level 3 | Weighted Average | Home price appreciation (depreciation)
On-balance sheet assets, at fair value:
HEI		0.04
Real estate securities - trading and AFS securities | Level 3
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities | $		$ 480,897
Real estate securities - trading and AFS securities | Level 3 | Minimum | Whole loan discount rate
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.04
Real estate securities - trading and AFS securities | Level 3 | Minimum | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0
Real estate securities - trading and AFS securities | Level 3 | Minimum | Default rate
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0
Real estate securities - trading and AFS securities | Level 3 | Minimum | Loss severity
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0
Real estate securities - trading and AFS securities | Level 3 | Maximum | Whole loan discount rate
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.22
Real estate securities - trading and AFS securities | Level 3 | Maximum | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.31
Real estate securities - trading and AFS securities | Level 3 | Maximum | Default rate
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.89
Real estate securities - trading and AFS securities | Level 3 | Maximum | Loss severity
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.40
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Whole loan discount rate
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.09
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.04
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Default rate
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.34
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Loss severity
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities, measurement input		0.10
Servicing Investments | Level 3
On-balance sheet assets, at fair value:
Servicing investments | $		$ 290,825
Servicing Investments | Level 3 | Minimum | Whole loan discount rate
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.08
Servicing Investments | Level 3 | Minimum | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0
Servicing Investments | Level 3 | Minimum | Prepayment yield (Annual CPY)
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.10
Servicing Investments | Level 3 | Maximum | Whole loan discount rate
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.11
Servicing Investments | Level 3 | Maximum | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.39
Servicing Investments | Level 3 | Maximum | Prepayment yield (Annual CPY)
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.50
Servicing Investments | Level 3 | Weighted Average | Whole loan discount rate
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.10
Servicing Investments | Level 3 | Weighted Average | Prepayment rate (Annual CPR)
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.10
Servicing Investments | Level 3 | Weighted Average | Prepayment yield (Annual CPY)
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.30
Derivative assets, net | Level 3
Liabilities
Derivatives, net | $		$ 15,098
Derivative assets, net | Level 3 | Minimum | Senior credit spread to TBA price
Liabilities
Derivatives, net, measurement input		0.63
Derivative assets, net | Level 3 | Minimum | Senior credit spread to Treasury Curve
Liabilities
Derivatives, net, measurement input		0.0125
Derivative assets, net | Level 3 | Minimum | Subordinate credit spread to Treasury Curve
Liabilities
Derivatives, net, measurement input		0.0145
Derivative assets, net | Level 3 | Minimum | Senior credit support
Liabilities
Derivatives, net, measurement input		0.07
Derivative assets, net | Level 3 | Minimum | IO discount rate
Liabilities
Derivatives, net, measurement input		0.10
Derivative assets, net | Level 3 | Minimum | Pull-through rate
Liabilities
Derivatives, net, measurement input		0.27
Derivative assets, net | Level 3 | Maximum | Senior credit spread to TBA price
Liabilities
Derivatives, net, measurement input		1.44
Derivative assets, net | Level 3 | Maximum | Senior credit spread to Treasury Curve
Liabilities
Derivatives, net, measurement input		0.0200
Derivative assets, net | Level 3 | Maximum | Subordinate credit spread to Treasury Curve
Liabilities
Derivatives, net, measurement input		0.0675
Derivative assets, net | Level 3 | Maximum | Senior credit support
Liabilities
Derivatives, net, measurement input		0.20
Derivative assets, net | Level 3 | Maximum | IO discount rate
Liabilities
Derivatives, net, measurement input		0.20
Derivative assets, net | Level 3 | Maximum | Pull-through rate
Liabilities
Derivatives, net, measurement input		1
Derivative assets, net | Level 3 | Weighted Average | Senior credit spread to TBA price
Liabilities
Derivatives, net, measurement input		0.92
Derivative assets, net | Level 3 | Weighted Average | Senior credit spread to Treasury Curve
Liabilities
Derivatives, net, measurement input		0.0139
Derivative assets, net | Level 3 | Weighted Average | Subordinate credit spread to Treasury Curve
Liabilities
Derivatives, net, measurement input		0.0264
Derivative assets, net | Level 3 | Weighted Average | Senior credit support
Liabilities
Derivatives, net, measurement input		0.10
Derivative assets, net | Level 3 | Weighted Average | IO discount rate
Liabilities
Derivatives, net, measurement input		0.16
Derivative assets, net | Level 3 | Weighted Average | Pull-through rate
Liabilities
Derivatives, net, measurement input		0.73
Strategic investments | Level 3
On-balance sheet assets, at fair value:
Strategic investments | $		$ 10,123
Strategic investments | Level 3 | Minimum | Transaction Price
On-balance sheet assets, at fair value:
Strategic investments, measurement input		200
Strategic investments | Level 3 | Maximum | Transaction Price
On-balance sheet assets, at fair value:
Strategic investments, measurement input		3,813
Strategic investments | Level 3 | Weighted Average | Transaction Price
On-balance sheet assets, at fair value:
Strategic investments, measurement input		1,125
Consolidated Sequoia Securitizations
Liabilities
Fair value of securities owned | $		$ 1,230,000		722,000
CAFL
Liabilities
Fair value of securities owned | $		314,000		$ 330,000
Securitization entity | tranche				2
At consolidated CAFL Bridge entities
Liabilities
Fair value of securities owned | $		$ 70,000		$ 50,000

[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.