Fair Value of Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands		Dec. 31, 2025	Dec. 31, 2024
Assets
Residential investor loans		$ 3,602,250	$ 4,587,090
Consolidated Agency multifamily loans			424,597
HEI		329,883	589,785
Trading		135,459	193,749
AFS		287,557	211,474
Servicing investments		302,230	297,683
Strategic investments		6,310	3,460
Derivative assets	[1]	105,597	46,003
Total Assets		22,705,047	17,431,664
Liabilities
ABS issued		17,433,600	12,879,530
Derivative liabilities	[1]	28,150	23,660
Non-controlling interest		92,644	99,510
Total Liabilities		17,554,394	13,002,700
Level 1
Assets
Residential investor loans		0	0
Consolidated Agency multifamily loans			0
HEI		0	0
Trading		0	0
AFS		0	0
Servicing investments		0	0
Strategic investments		0	0
Derivative assets		56,458	16,446
Total Assets		56,458	16,446
Liabilities
ABS issued		0	0
Derivative liabilities		26,973	23,164
Non-controlling interest		0	0
Total Liabilities		26,973	23,164
Level 2
Assets
Residential investor loans		0	0
Consolidated Agency multifamily loans			0
HEI		0	0
Trading		0	0
AFS		0	0
Servicing investments		0	0
Strategic investments		0	0
Derivative assets		31,119	23,738
Total Assets		31,119	23,738
Liabilities
ABS issued		0	0
Derivative liabilities		0	0
Non-controlling interest		0	0
Total Liabilities		0	0
Level 3
Assets
Residential investor loans		3,602,250	4,587,090
Consolidated Agency multifamily loans			424,597
HEI		329,883	589,785
Trading		135,459	193,749
AFS		287,557	211,474
Servicing investments		302,230	297,683
Strategic investments		6,310	3,460
Derivative assets		18,020	5,819
Total Assets		22,617,470	17,391,480
Liabilities
ABS issued		17,433,600	12,879,530
Derivative liabilities		1,177	496
Non-controlling interest		92,644	99,510
Total Liabilities		17,527,421	12,979,536
Residential consumer loans
Assets
Residential consumer loans		17,935,761	11,077,823
Residential consumer loans | Level 1
Assets
Residential consumer loans		0	0
Residential consumer loans | Level 2
Assets
Residential consumer loans		0	0
Residential consumer loans | Level 3
Assets
Residential consumer loans		$ 17,935,761	$ 11,077,823

[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.