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Segment Information - Supplemental Information by Segment (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Real estate securities	[1]	$ 377,411	$ 344,125
Other investments	[1]	641,969	348,175
Intangible assets	[1]	41,561	56,865
Total Assets	[1]	14,706,944	10,355,066
Residential loans
Segment Reporting Information [Line Items]
Loans, at fair value		7,592,432	4,249,051
Business Purpose Loans
Segment Reporting Information [Line Items]
Loans, at fair value		4,790,989	4,136,353
Multifamily securities
Segment Reporting Information [Line Items]
Loans, at fair value		473,514	492,221
Operating Segments | Residential Mortgage Banking
Segment Reporting Information [Line Items]
Real estate securities		4,927	5,279
Other investments		0	0
Intangible assets		0	0
Total Assets		1,716,285	242,060
Operating Segments | Residential Mortgage Banking | Residential loans
Segment Reporting Information [Line Items]
Loans, at fair value		1,673,235	176,641
Operating Segments | Residential Mortgage Banking | Business Purpose Loans
Segment Reporting Information [Line Items]
Loans, at fair value		0	0
Operating Segments | Residential Mortgage Banking | Multifamily securities
Segment Reporting Information [Line Items]
Loans, at fair value		0	0
Operating Segments | Business Purpose Mortgage Banking
Segment Reporting Information [Line Items]
Real estate securities		0	0
Other investments		0	0
Intangible assets		41,561	56,865
Total Assets		464,967	328,564
Operating Segments | Business Purpose Mortgage Banking | Residential loans
Segment Reporting Information [Line Items]
Loans, at fair value		0	0
Operating Segments | Business Purpose Mortgage Banking | Business Purpose Loans
Segment Reporting Information [Line Items]
Loans, at fair value		347,860	245,394
Operating Segments | Business Purpose Mortgage Banking | Multifamily securities
Segment Reporting Information [Line Items]
Loans, at fair value		0	0
Operating Segments | Investment Portfolio
Segment Reporting Information [Line Items]
Real estate securities		372,484	338,846
Other investments		606,267	343,724
Intangible assets		0	0
Total Assets		11,770,486	8,970,633
Operating Segments | Investment Portfolio | Residential loans
Segment Reporting Information [Line Items]
Loans, at fair value		5,688,742	3,786,475
Operating Segments | Investment Portfolio | Business Purpose Loans
Segment Reporting Information [Line Items]
Loans, at fair value		4,443,129	3,890,959
Operating Segments | Investment Portfolio | Multifamily securities
Segment Reporting Information [Line Items]
Loans, at fair value		473,514	492,221
Corporate/ Other
Segment Reporting Information [Line Items]
Real estate securities		0	0
Other investments		35,702	4,451
Intangible assets		0	0
Total Assets		755,206	813,809
Corporate/ Other | Residential loans
Segment Reporting Information [Line Items]
Loans, at fair value		230,455	285,935
Corporate/ Other | Business Purpose Loans
Segment Reporting Information [Line Items]
Loans, at fair value		0	0
Corporate/ Other | Multifamily securities
Segment Reporting Information [Line Items]
Loans, at fair value		$ 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 December 31, 2021 and 2020, assets of consolidated VIEs totaled $10,661,081 and $8,141,069, respectively. At December 31, 2021 and 2020, liabilities of consolidated VIEs totaled $9,619,347 and $7,148,414, respectively. See Note 4 for further discussion.

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