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Asset-Backed Securities Issued - Components of Asset-Backed Securities Issued by Consolidated Securitization Entities Sponsored, Along With Other Selected Information (Details) $ in Thousands		Mar. 31, 2018 USD ($) series	Dec. 31, 2017 USD ($) series
Debt Instrument [Line Items]
Total FHLBC Borrowings	[1]	$ 2,575,588	$ 2,575,023
Asset-backed securities issued
Debt Instrument [Line Items]
Market valuation adjustments		(34,264)	(62,864)
Total FHLBC Borrowings		1,542,087	1,164,585
Asset-backed securities issued | Certificates with principal balance
Debt Instrument [Line Items]
Certificates with principal balance		1,560,901	1,217,782
Asset-backed securities issued | Interest-only certificates
Debt Instrument [Line Items]
Certificates with principal balance		15,450	9,667
Asset-backed securities issued | Legacy Sequoia
Debt Instrument [Line Items]
Market valuation adjustments		(41,148)	(70,652)
Total FHLBC Borrowings		$ 615,849	$ 622,445
Number of series (in series) | series		20	20
Asset-backed securities issued | Legacy Sequoia | Minimum
Debt Instrument [Line Items]
Weighted average interest rates, by series		1.77%	1.46%
Asset-backed securities issued | Legacy Sequoia | Maximum
Debt Instrument [Line Items]
Weighted average interest rates, by series		2.83%	2.78%
Asset-backed securities issued | Legacy Sequoia | Certificates with principal balance
Debt Instrument [Line Items]
Certificates with principal balance		$ 655,188	$ 691,125
Asset-backed securities issued | Legacy Sequoia | Interest-only certificates
Debt Instrument [Line Items]
Certificates with principal balance		1,809	1,972
Asset-backed securities issued | Sequoia Choice
Debt Instrument [Line Items]
Market valuation adjustments		6,884	7,788
Total FHLBC Borrowings		$ 926,238	$ 542,140
Number of series (in series) | series		3	2
Asset-backed securities issued | Sequoia Choice | Minimum
Debt Instrument [Line Items]
Weighted average interest rates, by series		4.49%	4.52%
Asset-backed securities issued | Sequoia Choice | Maximum
Debt Instrument [Line Items]
Weighted average interest rates, by series		4.66%	4.73%
Asset-backed securities issued | Sequoia Choice | Certificates with principal balance
Debt Instrument [Line Items]
Certificates with principal balance		$ 905,713	$ 526,657
Asset-backed securities issued | Sequoia Choice | Interest-only certificates
Debt Instrument [Line Items]
Certificates with principal balance		$ 13,641	$ 7,695
[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 March 31, 2018 and December 31, 2017, assets of consolidated VIEs totaled $1,647,850 and $1,259,774, respectively. At March 31, 2018 and December 31, 2017, liabilities of consolidated VIEs totaled $1,546,066 and $1,167,157, respectively. See Note 4 for further discussion.

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