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Residential Loans - Summary of Classifications and Carrying Value of Residential Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
MSRs
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage servicing rights		$ 1,740,000
Held-for-sale at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value	[1]	1,845,282	$ 176,641
Residential loans, held-for-investment | Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		230,455	285,935
Residential loans, held-for-investment | Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		3,628,465	1,565,322
Residential loans, held-for-investment | Freddie Mac SLST(1)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		1,888,230	2,221,153
Residential Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		7,592,432	4,249,051
Residential Loans | Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		230,455	285,935
Residential Loans | Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		3,628,465	1,565,322
Residential Loans | Freddie Mac SLST(1)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		1,888,230	2,221,153
Residential Loans | Held-for-sale at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		1,845,282	176,641
Residential Loans | Held-for-sale at fair value | Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		0	0
Residential Loans | Held-for-sale at fair value | Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		0	0
Residential Loans | Held-for-sale at fair value | Freddie Mac SLST(1)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		0	0
Residential Loans | Residential loans, held-for-investment
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		5,747,150	4,072,410
Residential Loans | Residential loans, held-for-investment | Legacy Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		230,455	285,935
Residential Loans | Residential loans, held-for-investment | Sequoia
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		3,628,465	1,565,322
Residential Loans | Residential loans, held-for-investment | Freddie Mac SLST(1)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		1,888,230	2,221,153
Residential Loans | Redwood
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		1,845,282	176,641
Residential Loans | Redwood | Held-for-sale at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans, at fair value		1,845,282	176,641
Residential Loans | Redwood | Residential loans, held-for-investment
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [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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Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

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