Fair Value of Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands		Mar. 31, 2026	Dec. 31, 2025
Assets
Residential investor loans		$ 3,295,715	$ 3,602,250
HEI		341,101	329,883
Trading		182,137	135,459
AFS		294,250	287,557
Servicing investments		299,696	302,230
Strategic investments		10,123	6,310
Derivative assets	[1]	154,880	105,597
Total Assets		25,877,786	22,705,047
Liabilities
ABS issued		20,417,812	17,433,600
Derivative liabilities	[1]	156,244	28,150
Non-controlling interest		95,492	92,644
Total Liabilities		20,669,548	17,554,394
Level 1
Assets
Residential investor loans		0	0
HEI		0	0
Trading		0	0
AFS		0	0
Servicing investments		0	0
Strategic investments		0	0
Derivative assets		69,781	56,458
Total Assets		69,781	56,458
Liabilities
ABS issued		0	0
Derivative liabilities		146,207	26,973
Non-controlling interest		0	0
Total Liabilities		146,207	26,973
Level 2
Assets
Residential investor loans		0	0
HEI		0	0
Trading		0	0
AFS		0	0
Servicing investments		0	0
Strategic investments		0	0
Derivative assets		75,222	31,119
Total Assets		75,222	31,119
Liabilities
ABS issued		0	0
Derivative liabilities		0	0
Non-controlling interest		0	0
Total Liabilities		0	0
Level 3
Assets
Residential investor loans		3,295,715	3,602,250
HEI		341,101	329,883
Trading		182,137	135,459
AFS		294,250	287,557
Servicing investments		299,696	302,230
Strategic investments		10,123	6,310
Derivative assets		9,877	18,020
Total Assets		25,732,783	22,617,470
Liabilities
ABS issued		20,417,812	17,433,600
Derivative liabilities		10,037	1,177
Non-controlling interest		95,492	92,644
Total Liabilities		20,523,341	17,527,421
Residential Consumer Loans
Assets
Residential consumer loans		21,299,884	17,935,761
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		$ 21,299,884	$ 17,935,761

[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 March 31, 2026 and December 31, 2025, assets of consolidated VIEs totaled $22,076,415 and $18,927,094, respectively. At March 31, 2026 and December 31, 2025, liabilities of consolidated VIEs totaled $20,784,429 and $17,850,175, respectively. See Note 16 for further discussion.