Fair Value of Financial Instruments - Schedule of Fair Value Methodology for Level 3 Financial Instruments (Details) $ in Thousands		6 Months Ended
		Jun. 30, 2025 USD ($) $ / loan securitization_entity		Dec. 31, 2024 USD ($)		Jun. 30, 2024 USD ($)
On-balance sheet assets, at fair value:
Strategic investments | $		$ 3,460		$ 3,460
Total Assets | $		21,333,020	[1]	18,258,344	[1]	$ 16,491,104
Liabilities
Total liabilities | $	[1]	$ 20,279,557		17,070,481
Securitization entity | securitization_entity		3
Payable to non-controlling interests | $		$ 150,958		123,258
VIEs
On-balance sheet assets, at fair value:
Total Assets | $		17,484,443		14,654,942
Liabilities
Total liabilities | $		16,386,516		13,620,239
Collateralized Financing Entities | VIEs
On-balance sheet assets, at fair value:
Total Assets | $		17,484,443		14,654,942
Liabilities
Total liabilities | $		16,386,516		13,620,239
Collateralized Financing Entities | HEI | VIEs
On-balance sheet assets, at fair value:
Total Assets | $		347,619		341,326
Liabilities
Total liabilities | $		296,213		294,018
Level 3
On-balance sheet assets, at fair value:
Total Assets | $		20,106,330
Liabilities
Total liabilities | $		15,842,004
Level 3 | ABS Issued
Liabilities
ABS issued | $		15,714,392
Level 3 | Noncontrolling Interest
Liabilities
Non-controlling interests | $		$ 127,612
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		0.13
Level 3 | Minimum | Prepayment rate (annual CPR) | ABS Issued
Liabilities
ABS issued, measurement input		0
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 | Maximum | Whole loan discount rate | ABS Issued
Liabilities
ABS issued, measurement input		0.20
Level 3 | Maximum | Whole loan discount rate | Noncontrolling Interest
Liabilities
Non-controlling interest, measurement input		0.20
Level 3 | Maximum | Prepayment rate (annual CPR) | ABS Issued
Liabilities
ABS issued, measurement input		0.47
Level 3 | Maximum | Default rate | ABS Issued
Liabilities
ABS issued, measurement input		0.19
Level 3 | Maximum | Loss severity | ABS Issued
Liabilities
ABS issued, measurement input		0.50
Level 3 | Weighted Average | Whole loan discount rate | ABS Issued
Liabilities
ABS issued, measurement input		0.03
Level 3 | Weighted Average | Whole loan discount rate | Noncontrolling Interest
Liabilities
Non-controlling interest, measurement input		0.16
Level 3 | Weighted Average | Prepayment rate (annual CPR) | ABS Issued
Liabilities
ABS issued, measurement input		0.07
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
Residential consumer loans | Level 3
On-balance sheet assets, at fair value:
Loans receivable, fair value | $		$ 14,201,893
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		0.88
Residential consumer loans | Level 3 | Minimum | Senior credit spread to Swap rate
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0130
Residential consumer loans | Level 3 | Minimum | Subordinate credit spread to Swap rate
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0190
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		0.22
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 | Minimum | Dollar price of Aspire non-QM loans
On-balance sheet assets, at fair value:
Loans receivable, measurement input		99
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		1.50
Residential consumer loans | Level 3 | Maximum | Senior credit spread to Swap rate
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0300
Residential consumer loans | Level 3 | Maximum | Subordinate credit spread to Swap rate
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		0.07
Residential consumer loans | Level 3 | Maximum | IO discount rate
On-balance sheet assets, at fair value:
Loans receivable, measurement input		0.23
Residential consumer loans | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		104
Residential consumer loans | Level 3 | Maximum | Dollar price of Aspire non-QM loans
On-balance sheet assets, at fair value:
Loans receivable, measurement input		106
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		1.04
Residential consumer loans | Level 3 | Weighted Average | Senior credit spread to Swap rate
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0162
Residential consumer loans | Level 3 | Weighted Average | Subordinate credit spread to Swap rate
On-balance sheet assets, at fair value:
Loans held-for-sale, measurement input		0.0293
Residential consumer loans | Level 3 | Weighted Average | Senior credit support
On-balance sheet assets, at fair value:
Loan purchase commitments, measurement input		0.07
Residential consumer loans | Level 3 | Weighted Average | IO discount rate
On-balance sheet assets, at fair value:
Loans receivable, measurement input		0.22
Residential consumer loans | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		96
Residential consumer loans | Level 3 | Weighted Average | Dollar price of Aspire non-QM loans
On-balance sheet assets, at fair value:
Loans receivable, measurement input		103
Residential investor term loans | Level 3
On-balance sheet assets, at fair value:
Loans receivable, fair value | $		$ 2,445,687
Residential investor term loans | Level 3 | Minimum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		91
Residential investor term loans | Level 3 | Minimum | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0235
Residential investor term loans | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		102
Residential investor term loans | Level 3 | Maximum | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0235
Residential investor term loans | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		95
Residential investor term loans | Level 3 | Weighted Average | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0235
Residential investor bridge loans | Level 3
On-balance sheet assets, at fair value:
Loans receivable, fair value | $		$ 1,868,248
Residential investor bridge loans | Level 3 | Minimum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		96
Residential investor bridge loans | Level 3 | Minimum | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0445
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 non-performing loans
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		35
Residential investor bridge loans | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		171
Residential investor bridge loans | Level 3 | Maximum | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0445
Residential investor bridge loans | Level 3 | Maximum | Whole loan discount rate
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.15
Residential investor bridge loans | Level 3 | Maximum | Dollar price of non-performing loans
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		100
Residential investor bridge loans | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		102
Residential investor bridge loans | Level 3 | Weighted Average | Whole loan spread
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		0.0445
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		0.10
Residential investor bridge loans | Level 3 | Weighted Average | Dollar price of non-performing loans
On-balance sheet assets, at fair value:
Loans held-for-investment, measurement input		78
Consolidated Agency Multifamily Loans | Level 3
On-balance sheet assets, at fair value:
Loans receivable, fair value | $		$ 423,097
Consolidated Agency Multifamily Loans | Level 3 | Minimum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		99
Consolidated Agency Multifamily Loans | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		99
Consolidated Agency Multifamily Loans | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		99
HEI | Collateralized Financing Entities | HEI | VIEs
Liabilities
Fair value of securities owned | $		$ 51,000
HEI | Level 3
On-balance sheet assets, at fair value:
Home appreciation options | $		$ 587,636
HEI | Level 3 | Minimum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		146
HEI | Level 3 | Minimum | Whole loan discount rate
On-balance sheet assets, at fair value:
HEI		0.10
HEI | Level 3 | Minimum | Prepayment rate (annual CPR)
On-balance sheet assets, at fair value:
HEI		0.01
HEI | Level 3 | Minimum | Home price appreciation (depreciation)
On-balance sheet assets, at fair value:
HEI		0.035
HEI | Level 3 | Maximum | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		208
HEI | Level 3 | Maximum | Whole loan discount rate
On-balance sheet assets, at fair value:
HEI		0.12
HEI | Level 3 | Maximum | Prepayment rate (annual CPR)
On-balance sheet assets, at fair value:
HEI		0.20
HEI | Level 3 | Maximum | Home price appreciation (depreciation)
On-balance sheet assets, at fair value:
HEI		0.035
HEI | Level 3 | Weighted Average | Liability price
On-balance sheet assets, at fair value:
Loans receivable, measurement input		168
HEI | Level 3 | Weighted Average | Whole loan discount rate
On-balance sheet assets, at fair value:
HEI		0.12
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		0.035
Real estate securities - trading and AFS securities | Level 3
On-balance sheet assets, at fair value:
Real estate securities - trading and AFS securities | $		$ 264,997
Real estate securities - trading and AFS securities | Level 3 | Minimum | Whole loan discount rate
On-balance sheet assets, at fair value:
Trading and AFS securities		0.05
Real estate securities - trading and AFS securities | Level 3 | Minimum | Prepayment rate (annual CPR)
On-balance sheet assets, at fair value:
Trading and AFS securities		0.02
Real estate securities - trading and AFS securities | Level 3 | Minimum | Default rate
On-balance sheet assets, at fair value:
Trading and AFS securities		0
Real estate securities - trading and AFS securities | Level 3 | Minimum | Loss severity
On-balance sheet assets, at fair value:
Trading and AFS securities		0
Real estate securities - trading and AFS securities | Level 3 | Maximum | Whole loan discount rate
On-balance sheet assets, at fair value:
Trading and AFS securities		0.32
Real estate securities - trading and AFS securities | Level 3 | Maximum | Prepayment rate (annual CPR)
On-balance sheet assets, at fair value:
Trading and AFS securities		0.32
Real estate securities - trading and AFS securities | Level 3 | Maximum | Default rate
On-balance sheet assets, at fair value:
Trading and AFS securities		0.08
Real estate securities - trading and AFS securities | Level 3 | Maximum | Loss severity
On-balance sheet assets, at fair value:
Trading and AFS securities		0.50
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Whole loan discount rate
On-balance sheet assets, at fair value:
Trading and AFS securities		0.12
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Prepayment rate (annual CPR)
On-balance sheet assets, at fair value:
Trading and AFS securities		0.10
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Default rate
On-balance sheet assets, at fair value:
Trading and AFS securities		0
Real estate securities - trading and AFS securities | Level 3 | Weighted Average | Loss severity
On-balance sheet assets, at fair value:
Trading and AFS securities		0.24
Servicing Investments | Level 3
On-balance sheet assets, at fair value:
Servicing investments | $		$ 298,004
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		0.02
Servicing Investments | Level 3 | Maximum | Whole loan discount rate
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.19
Servicing Investments | Level 3 | Maximum | Prepayment rate (annual CPR)
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.52
Servicing Investments | Level 3 | Weighted Average | Whole loan discount rate
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.13
Servicing Investments | Level 3 | Weighted Average | Prepayment rate (annual CPR)
On-balance sheet assets, at fair value:
Servicing asset, measurement input		0.13
Derivative assets, net | Level 3
On-balance sheet assets, at fair value:
Derivative assets, net | $		$ 13,308
Derivative assets, net | Level 3 | Minimum | Senior credit spread to TBA price
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.88
Derivative assets, net | Level 3 | Minimum | Senior credit spread to Swap rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.0185
Derivative assets, net | Level 3 | Minimum | Subordinate credit spread to Swap rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.0190
Derivative assets, net | Level 3 | Minimum | Senior credit support
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.07
Derivative assets, net | Level 3 | Minimum | IO discount rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.22
Derivative assets, net | Level 3 | Minimum | Dollar price of Aspire non-QM loans
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		94
Derivative assets, net | Level 3 | Minimum | Pull-through rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.06
Derivative assets, net | Level 3 | Maximum | Senior credit spread to TBA price
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		1.5
Derivative assets, net | Level 3 | Maximum | Senior credit spread to Swap rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.0300
Derivative assets, net | Level 3 | Maximum | Subordinate credit spread to Swap rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.0675
Derivative assets, net | Level 3 | Maximum | Senior credit support
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.07
Derivative assets, net | Level 3 | Maximum | IO discount rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.23
Derivative assets, net | Level 3 | Maximum | Dollar price of Aspire non-QM loans
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		106
Derivative assets, net | Level 3 | Maximum | Pull-through rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		1
Derivative assets, net | Level 3 | Weighted Average | Senior credit spread to TBA price
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		1.04
Derivative assets, net | Level 3 | Weighted Average | Senior credit spread to Swap rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.0204
Derivative assets, net | Level 3 | Weighted Average | Subordinate credit spread to Swap rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.0293
Derivative assets, net | Level 3 | Weighted Average | Senior credit support
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.07
Derivative assets, net | Level 3 | Weighted Average | IO discount rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.22
Derivative assets, net | Level 3 | Weighted Average | Dollar price of Aspire non-QM loans
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		103
Derivative assets, net | Level 3 | Weighted Average | Pull-through rate
On-balance sheet assets, at fair value:
Derivative assets, net measurement input		0.63
Strategic investments | Level 3
On-balance sheet assets, at fair value:
Strategic investments | $		$ 3,460
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		1,000
Strategic investments | Level 3 | Weighted Average | Transaction Price
On-balance sheet assets, at fair value:
Strategic investments, measurement input		494
Sequoia
Liabilities
Fair value of securities owned | $		$ 611,000
CAFL
Liabilities
Fair value of securities owned | $		$ 330,000		326,000
Securitization entity | securitization_entity		2
Freddie Mac SLST
Liabilities
Fair value of securities owned | $		$ 257,000		$ 242,000
Freddie Mac K-Series
Liabilities
Fair value of securities owned | $		$ 36,000

[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, 2025 and December 31, 2024, assets of consolidated VIEs totaled $17,484,443 and $14,654,942, respectively. At June 30, 2025 and December 31, 2024, liabilities of consolidated VIEs totaled $16,386,516 and $13,620,239, respectively. See Note 16 for further discussion.