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Segment Information - Supplemental Information by Segment (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Home equity investments		$ 340,437	$ 192,740
Real estate securities	[1]	259,212	377,411
Other investments	[1]	412,762	449,229
Goodwill	[1]	23,373	0
Intangible assets		44,130	41,561
Total Assets	[1]	13,145,947	14,706,944
Residential loans
Segment Reporting Information [Line Items]
Fair value of loans		5,752,556	7,592,432
Business purpose loans
Segment Reporting Information [Line Items]
Fair value of loans		5,257,218	4,790,989
Consolidated Agency multifamily loans
Segment Reporting Information [Line Items]
Fair value of loans		427,458	473,514
Operating Segments | Residential Mortgage Banking
Segment Reporting Information [Line Items]
Home equity investments		0	0
Real estate securities		0	4,927
Other investments		0	0
Goodwill		0
Intangible assets		0	0
Total Assets		738,301	1,716,285
Operating Segments | Residential Mortgage Banking | Residential loans
Segment Reporting Information [Line Items]
Fair value of loans		676,458	1,673,235
Operating Segments | Residential Mortgage Banking | Business purpose loans
Segment Reporting Information [Line Items]
Fair value of loans		0	0
Operating Segments | Residential Mortgage Banking | Consolidated Agency multifamily loans
Segment Reporting Information [Line Items]
Fair value of loans		0	0
Operating Segments | Business Purpose Mortgage Banking
Segment Reporting Information [Line Items]
Home equity investments		0	0
Real estate securities		0	0
Other investments		0	0
Goodwill		23,373
Intangible assets		44,130	41,561
Total Assets		473,748	464,967
Operating Segments | Business Purpose Mortgage Banking | Residential loans
Segment Reporting Information [Line Items]
Fair value of loans		0	0
Operating Segments | Business Purpose Mortgage Banking | Business purpose loans
Segment Reporting Information [Line Items]
Fair value of loans		337,238	347,860
Operating Segments | Business Purpose Mortgage Banking | Consolidated Agency multifamily loans
Segment Reporting Information [Line Items]
Fair value of loans		0	0
Operating Segments | Investment Portfolio
Segment Reporting Information [Line Items]
Home equity investments		340,437	192,740
Real estate securities		259,212	372,484
Other investments		341,155	413,527
Goodwill		0
Intangible assets		0	0
Total Assets		11,301,836	11,770,486
Operating Segments | Investment Portfolio | Residential loans
Segment Reporting Information [Line Items]
Fair value of loans		4,877,938	5,688,742
Operating Segments | Investment Portfolio | Business purpose loans
Segment Reporting Information [Line Items]
Fair value of loans		4,919,980	4,443,129
Operating Segments | Investment Portfolio | Consolidated Agency multifamily loans
Segment Reporting Information [Line Items]
Fair value of loans		427,458	473,514
Corporate/ Other
Segment Reporting Information [Line Items]
Home equity investments		0	0
Real estate securities		0	0
Other investments		71,607	35,702
Goodwill		0
Intangible assets		0	0
Total Assets		632,062	755,206
Corporate/ Other | Residential loans
Segment Reporting Information [Line Items]
Fair value of loans		198,160	230,455
Corporate/ Other | Business purpose loans
Segment Reporting Information [Line Items]
Fair value of loans		0	0
Corporate/ Other | Consolidated Agency multifamily loans
Segment Reporting Information [Line Items]
Fair value of loans		$ 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 September 30, 2022 and December 31, 2021, assets of consolidated VIEs totaled $9,449,163 and $10,661,081, respectively. At September 30, 2022 and December 31, 2021, liabilities of consolidated VIEs totaled $8,448,479 and $9,619,347, respectively. See Note 4 for further discussion.

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