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Principles of Consolidation - Summary of Redwood's Interest in Third-Party Variable Interest Entity's (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Real estate securities	[1]	$ 377,411	$ 344,125
Real estate securities | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Real estate securities		242,055	200,801
Real estate securities | Senior | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Real estate securities		3,572	11,131
Real estate securities | Mezzanine | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Real estate securities		0	2,014
Real estate securities | Subordinate | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Real estate securities		228,083	173,523
Real estate securities | Total Mortgage-Backed Securities | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Real estate securities		231,655	186,668
Real estate securities | Excess MSR | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Real estate securities		$ 10,400	$ 14,133
[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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- Definition

Amount of investment in marketable security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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