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Real Estate Securities - Fair Values of Real Estate Securities (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Trading		$ 153,010	$ 125,667
Available-for-sale		200,276	218,458
Total Real Estate Securities	[1]	$ 353,286	$ 344,125
[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, 2021 and December 31, 2020, assets of consolidated VIEs totaled $9,358,317 and $8,141,069, respectively. At September 30, 2021 and December 31, 2020, liabilities of consolidated VIEs totaled $8,391,761 and $7,348,713, respectively. See Note 4 for further discussion.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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