Principles of Consolidation - Schedule of Assets and Liabilities of Consolidated VIEs (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2025 USD ($) Investment securitization		Dec. 31, 2025 USD ($) Investment tranche		Dec. 31, 2024 USD ($) Investment securitization		Dec. 31, 2023 USD ($)
Variable Interest Entity [Line Items]
Home equity investments	[1]	$ 329,883		$ 329,883		$ 589,785
Strategic investments	[1]	101,958		101,958		78,123
Cash and cash equivalents		255,664	[1]	255,664	[1]	245,165	[1]	$ 293,000
Accrued interest receivable		130,955		130,955		115,832
Other assets	[1]	413,522		413,522		415,717
Total Assets		23,701,114	[1]	23,701,114	[1]	18,258,344	[1]	$ 14,504,327
Debt Obligations	[1]	4,799,382		4,799,382		3,462,880
Accrued interest payable		81,851		81,851		70,988
Accrued expenses and other liabilities	[1]	398,935		398,935		313,737
Asset-backed securities issued	[1]	17,492,031		17,492,031		13,270,204
Total liabilities	[1]	$ 22,718,498		22,718,498		17,070,481
Securitization entity | securitization		4
Total Fair Value		$ 287,557		$ 287,557		211,474
Number of securitization transactions co-sponsored, called upon | securitization		1
CAFL Securitization Entities
Variable Interest Entity [Line Items]
Securitization entity		2		2
Fair value of securities owned		$ 330,000		$ 330,000		326,000
CAFL Bridge Loan Securitization
Variable Interest Entity [Line Items]
Fair value of securities owned		50,000		50,000		29,000
Freddie Mac SLST Securitization Entities
Variable Interest Entity [Line Items]
Fair value of securities owned		$ 254,000		254,000		$ 242,000
Sequoia Re-securitization Trust
Variable Interest Entity [Line Items]
Securitization entity | securitization		3				1
Total Fair Value		$ 165,000		165,000		$ 79,000
Consolidated Sequoia Securitizations
Variable Interest Entity [Line Items]
Fair value of securities owned		722,000		722,000		418,000
Total Fair Value		417,000		417,000		184,000
VIEs
Variable Interest Entity [Line Items]
Total Assets		18,927,094		18,927,094		14,654,942
Total liabilities		17,850,175		17,850,175		13,620,239
VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Home equity investments		191,121		191,121		332,470
Strategic investments		265,771		265,771		262,353
Cash and cash equivalents		32,408		32,408		13,243
Restricted cash		167,742		167,742		31,036
Accrued interest receivable		99,118		99,118		71,334
Other assets		58,785		58,785		68,176
Total Assets		18,927,094		18,927,094		14,654,942
Debt Obligations		152,293		152,293		159,031
Accrued interest payable		64,996		64,996		52,141
Accrued expenses and other liabilities		140,855		140,855		138,863
Asset-backed securities issued		17,492,031		17,492,031		13,270,204
Total liabilities		17,850,175		17,850,175		13,620,239
Value of our investments in VIEs		$ 1,058,824		$ 1,058,824		$ 1,025,744
Number of VIEs | Investment		99		99		84
VIEs | Collateralized Financing Entities | Sequoia
Variable Interest Entity [Line Items]
Home equity investments		$ 0		$ 0		$ 0
Strategic investments		0		0		0
Cash and cash equivalents		0		0		0
Restricted cash		266		266		248
Accrued interest receivable		73,864		73,864		43,503
Other assets		1,984		1,984		7
Total Assets		15,084,952		15,084,952		8,942,597
Debt Obligations		0		0		0
Accrued interest payable		57,525		57,525		37,191
Accrued expenses and other liabilities		121		121		103
Asset-backed securities issued		14,540,397		14,540,397		8,585,077
Total liabilities		14,598,043		14,598,043		8,622,371
Value of our investments in VIEs		$ 470,496		$ 470,496		$ 313,833
Number of VIEs | Investment		72		72		54
VIEs | Collateralized Financing Entities | CAFL Securitization Entities
Variable Interest Entity [Line Items]
Home equity investments		$ 0		$ 0		$ 0
Strategic investments		0		0		0
Cash and cash equivalents		0		0		0
Restricted cash		161,780		161,780		22,385
Accrued interest receivable		23,330		23,330		19,998
Other assets		54,667		54,667		60,859
Total Assets		3,343,088		3,343,088		3,411,414
Debt Obligations		0		0		0
Accrued interest payable		7,210		7,210		9,410
Accrued expenses and other liabilities		57,301		57,301		28,672
Asset-backed securities issued		2,824,159		2,824,159		2,932,749
Total liabilities		2,888,670		2,888,670		2,970,831
Value of our investments in VIEs		$ 452,736		$ 452,736		$ 438,590
Number of VIEs | Investment		23		23		21
VIEs | Collateralized Financing Entities | Freddie Mac SLST Securitization Entities
Variable Interest Entity [Line Items]
Home equity investments		$ 0		$ 0		$ 0
Strategic investments		0		0		0
Cash and cash equivalents		0		0		0
Restricted cash		0		0		0
Accrued interest receivable		0		0		4,510
Other assets		0		0		2,987
Total Assets		0		0		1,252,219
Debt Obligations		0		0		0
Accrued interest payable		0		0		4,062
Accrued expenses and other liabilities		0		0		0
Asset-backed securities issued		0		0		1,151,847
Total liabilities		0		0		1,155,909
Value of our investments in VIEs		$ 0		$ 0		$ 95,863
Number of VIEs | Investment		0		0		3
VIEs | Collateralized Financing Entities | Freddie Mac K-Series Securitization Entities
Variable Interest Entity [Line Items]
Home equity investments		$ 0		$ 0		$ 0
Strategic investments		0		0		0
Cash and cash equivalents		0		0		0
Restricted cash		0		0		0
Accrued interest receivable		0		0		1,245
Other assets		0		0		0
Total Assets		0		0		425,842
Debt Obligations		0		0		0
Accrued interest payable		0		0		1,119
Accrued expenses and other liabilities		0		0		0
Asset-backed securities issued		0		0		389,434
Total liabilities		0		0		390,553
Value of our investments in VIEs		$ 0		$ 0		$ 35,163
Number of VIEs | Investment		0		0		1
VIEs | Collateralized Financing Entities | Servicing Investment
Variable Interest Entity [Line Items]
Home equity investments		$ 0		$ 0		$ 0
Strategic investments		265,771		265,771		262,353
Cash and cash equivalents		32,408		32,408		13,243
Restricted cash		0		0		0
Accrued interest receivable		1,924		1,924		2,078
Other assets		1,833		1,833		3,870
Total Assets		301,936		301,936		281,544
Debt Obligations		152,293		152,293		159,031
Accrued interest payable		261		261		359
Accrued expenses and other liabilities		39,248		39,248		27,167
Asset-backed securities issued		0		0		0
Total liabilities		191,802		191,802		186,557
Value of our investments in VIEs		$ 110,134		$ 110,134		$ 94,987
Number of VIEs | Investment		3		3		3
VIEs | Collateralized Financing Entities | Point HEI
Variable Interest Entity [Line Items]
Home equity investments		$ 191,121		$ 191,121		$ 332,470
Strategic investments		0		0		0
Cash and cash equivalents		0		0		0
Restricted cash		5,696		5,696		8,403
Accrued interest receivable		0		0		0
Other assets		301		301		453
Total Assets		197,118		197,118		341,326
Debt Obligations		0		0		0
Accrued interest payable		0		0		0
Accrued expenses and other liabilities		44,185		44,185		82,921
Asset-backed securities issued		127,475		127,475		211,097
Total liabilities		171,660		171,660		294,018
Value of our investments in VIEs		$ 25,458		$ 25,458		$ 47,308
Number of VIEs | Investment		1		1		2
VIEs | Collateralized Financing Entities | Residential consumer loans, held-for-investment
Variable Interest Entity [Line Items]
Fair value of loans		$ 14,843,746		$ 14,843,746		$ 10,064,276
VIEs | Collateralized Financing Entities | Residential consumer loans, held-for-investment | Sequoia
Variable Interest Entity [Line Items]
Fair value of loans		14,843,746		14,843,746		8,819,554
VIEs | Collateralized Financing Entities | Residential consumer loans, held-for-investment | CAFL Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Residential consumer loans, held-for-investment | Freddie Mac SLST Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		1,244,722
VIEs | Collateralized Financing Entities | Residential consumer loans, held-for-investment | Freddie Mac K-Series Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Residential consumer loans, held-for-investment | Servicing Investment
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Residential consumer loans, held-for-investment | Point HEI
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Residential investor loans, held-for-investment
Variable Interest Entity [Line Items]
Fair value of loans		3,103,311		3,103,311		3,308,172
VIEs | Collateralized Financing Entities | Residential investor loans, held-for-investment | Sequoia
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Residential investor loans, held-for-investment | CAFL Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		3,103,311		3,103,311		3,308,172
VIEs | Collateralized Financing Entities | Residential investor loans, held-for-investment | Freddie Mac SLST Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Residential investor loans, held-for-investment | Freddie Mac K-Series Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Residential investor loans, held-for-investment | Servicing Investment
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Residential investor loans, held-for-investment | Point HEI
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Consolidated Agency multifamily loans
Variable Interest Entity [Line Items]
Fair value of loans		0		0		424,597
VIEs | Collateralized Financing Entities | Consolidated Agency multifamily loans | Sequoia
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Consolidated Agency multifamily loans | CAFL Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Consolidated Agency multifamily loans | Freddie Mac SLST Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Consolidated Agency multifamily loans | Freddie Mac K-Series Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		424,597
VIEs | Collateralized Financing Entities | Consolidated Agency multifamily loans | Servicing Investment
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Consolidated Agency multifamily loans | Point HEI
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Real estate securities
Variable Interest Entity [Line Items]
Fair value of loans		165,092		165,092		79,285
VIEs | Collateralized Financing Entities | Real estate securities | Sequoia
Variable Interest Entity [Line Items]
Fair value of loans		165,092		165,092		79,285
VIEs | Collateralized Financing Entities | Real estate securities | CAFL Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Real estate securities | Freddie Mac SLST Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Real estate securities | Freddie Mac K-Series Securitization Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Real estate securities | Servicing Investment
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
VIEs | Collateralized Financing Entities | Real estate securities | Point HEI
Variable Interest Entity [Line Items]
Fair value of loans		$ 0		$ 0		$ 0

[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.