Principles of Consolidation - Schedule of Assets and Liabilities of Consolidated VIEs (Details) $ in Thousands		6 Months Ended				12 Months Ended
		Jun. 30, 2026 USD ($) Investment securitization		Jun. 30, 2026 USD ($) securitization_entity Investment		Dec. 31, 2025 USD ($) tranche Investment securitization		Jun. 30, 2025 USD ($)
Variable Interest Entity [Line Items]
Home equity investments	[1]	$ 339,735		$ 339,735		$ 329,883
Other investments	[1]	97,133		97,133		101,958
Cash and cash equivalents		191,846	[1]	191,846	[1]	255,664	[1]	$ 301,979
Accrued interest receivable		151,426		151,426		130,955
Other assets	[1]	471,256		471,256		413,522
Total Assets		28,818,131	[1]	28,818,131	[1]	23,701,114	[1]	$ 21,333,020
Accrued interest payable		105,110		105,110		81,851
Accrued expenses and other liabilities	[1]	400,899		400,899		398,935
Asset-backed securities issued	[1]	22,515,907		22,515,907		17,492,031
Total liabilities	[1]	$ 27,884,292		27,884,292		22,718,498
Securitization entity | securitization		4
AFS		$ 287,347		287,347		$ 287,557
Residential investor term loans held by CAFL
Variable Interest Entity [Line Items]
Securitization entity | tranche						2
Fair value of securities owned		$ 314,000		$ 314,000		$ 330,000
Sequoia Re-securitization Trust
Variable Interest Entity [Line Items]
Securitization entity		3		3		3
AFS		$ 165,000		$ 165,000		$ 165,000
Consolidated Sequoia Securitizations
Variable Interest Entity [Line Items]
Fair value of securities owned		1,230,000		1,230,000		722,000
AFS		445,000		445,000		417,000
At consolidated CAFL Bridge entities
Variable Interest Entity [Line Items]
Fair value of securities owned		70,000		70,000		50,000
VIEs
Variable Interest Entity [Line Items]
Total Assets		24,372,361		24,372,361		18,927,094
Total liabilities		22,877,902		22,877,902		17,850,175
VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Home equity investments		194,261		194,261		191,121
Other investments		244,187		244,187		265,771
Cash and cash equivalents		20,723		20,723		32,408
Restricted cash		92,498		92,498		167,742
Accrued interest receivable		123,196		123,196		99,118
Other assets		106,301		106,301		58,785
Total Assets		24,372,361		24,372,361		18,927,094
Debt Obligations		128,025		128,025		152,293
Accrued interest payable		84,805		84,805		64,996
Accrued expenses and other liabilities		149,165		149,165		140,855
Asset-backed securities issued		22,515,907		22,515,907		17,492,031
Total liabilities		22,877,902		22,877,902		17,850,175
Value of our investments in VIEs		$ 1,473,117		$ 1,473,117		$ 1,058,824
Number of VIEs | Investment		111		111		99
Residential consumer loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		$ 20,702,101		$ 20,702,101		$ 14,843,746
Residential investor loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		2,724,424		2,724,424		3,103,311
Real estate securities | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		164,670		164,670		165,092
Sequoia | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Home equity investments		0		0		0
Other investments		0		0		0
Cash and cash equivalents		0		0		0
Restricted cash		312		312		266
Accrued interest receivable		95,836		95,836		73,864
Other assets		6,655		6,655		1,984
Total Assets		20,969,574		20,969,574		15,084,952
Debt Obligations		0		0		0
Accrued interest payable		76,159		76,159		57,525
Accrued expenses and other liabilities		162		162		121
Asset-backed securities issued		19,926,622		19,926,622		14,540,397
Total liabilities		20,002,943		20,002,943		14,598,043
Value of our investments in VIEs		$ 946,822		$ 946,822		$ 470,496
Number of VIEs | Investment		86		86		72
Sequoia | Residential consumer loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		$ 20,702,101		$ 20,702,101		$ 14,843,746
Sequoia | Residential investor loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
Sequoia | Real estate securities | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		164,670		164,670		165,092
Residential investor term loans held by CAFL | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Home equity investments		0		0		0
Other investments		0		0		0
Cash and cash equivalents		0		0		0
Restricted cash		87,128		87,128		161,780
Accrued interest receivable		25,524		25,524		23,330
Other assets		98,008		98,008		54,667
Total Assets		2,935,084		2,935,084		3,343,088
Debt Obligations		0		0		0
Accrued interest payable		8,451		8,451		7,210
Accrued expenses and other liabilities		68,238		68,238		57,301
Asset-backed securities issued		2,462,927		2,462,927		2,824,159
Total liabilities		2,539,616		2,539,616		2,888,670
Value of our investments in VIEs		$ 393,935		$ 393,935		$ 452,736
Number of VIEs | Investment		21		21		23
Residential investor term loans held by CAFL | Residential consumer loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		$ 0		$ 0		$ 0
Residential investor term loans held by CAFL | Residential investor loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		2,724,424		2,724,424		3,103,311
Residential investor term loans held by CAFL | Real estate securities | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
Servicing Investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Home equity investments		0		0		0
Other investments		244,187		244,187		265,771
Cash and cash equivalents		20,723		20,723		32,408
Restricted cash		0		0		0
Accrued interest receivable		1,836		1,836		1,924
Other assets		1,276		1,276		1,833
Total Assets		268,022		268,022		301,936
Debt Obligations		128,025		128,025		152,293
Accrued interest payable		195		195		261
Accrued expenses and other liabilities		34,246		34,246		39,248
Asset-backed securities issued		0		0		0
Total liabilities		162,466		162,466		191,802
Value of our investments in VIEs		$ 105,556		$ 105,556		$ 110,134
Number of VIEs | Investment		3		3		3
Servicing Investment | Residential consumer loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		$ 0		$ 0		$ 0
Servicing Investment | Residential investor loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
Servicing Investment | Real estate securities | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
HEI | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Home equity investments		194,261		194,261		191,121
Other investments		0		0		0
Cash and cash equivalents		0		0		0
Restricted cash		5,058		5,058		5,696
Accrued interest receivable		0		0		0
Other assets		362		362		301
Total Assets		199,681		199,681		197,118
Debt Obligations		0		0		0
Accrued interest payable		0		0		0
Accrued expenses and other liabilities		46,519		46,519		44,185
Asset-backed securities issued		126,358		126,358		127,475
Total liabilities		172,877		172,877		171,660
Value of our investments in VIEs		$ 26,804		$ 26,804		$ 25,458
Number of VIEs | Investment		1		1		1
HEI | Residential consumer loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		$ 0		$ 0		$ 0
HEI | Residential investor loans, held-for-investment | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		0		0		0
HEI | Real estate securities | VIEs | Collateralized Financing Entities
Variable Interest Entity [Line Items]
Fair value of loans		$ 0		$ 0		$ 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.