Fair Value of Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands		Jun. 30, 2026	Dec. 31, 2025
Assets
Residential investor loans		$ 3,111,606	$ 3,602,250
HEI		339,735	329,883
Trading		193,550	135,459
AFS		287,347	287,557
Servicing investments		290,825	302,230
Strategic investments		10,123	6,310
Derivative assets	[1]	59,436	105,597
Total Assets		27,931,318	22,705,047
Liabilities
ABS issued		22,515,907	17,433,600
Derivative liabilities	[1]	10,912	28,150
Non-controlling interest		92,631	92,644
Total Liabilities		22,619,450	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		8,099	56,458
Total Assets		8,099	56,458
Liabilities
ABS issued		0	0
Derivative liabilities		4,289	26,973
Non-controlling interest		0	0
Total Liabilities		4,289	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		29,616	31,119
Total Assets		29,616	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		3,111,606	3,602,250
HEI		339,735	329,883
Trading		193,550	135,459
AFS		287,347	287,557
Servicing investments		290,825	302,230
Strategic investments		10,123	6,310
Derivative assets		21,721	18,020
Total Assets		27,893,603	22,617,470
Liabilities
ABS issued		22,515,907	17,433,600
Derivative liabilities		6,623	1,177
Non-controlling interest		92,631	92,644
Total Liabilities		22,615,161	17,527,421
Residential Consumer Loans
Assets
Residential consumer loans		23,638,696	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		$ 23,638,696	$ 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 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.