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Commercial Loans - Summary of Classifications and Carrying Value of Commercial Loans (Detail) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Commercial Loans [Line Items]
Commercial loans		$ 402,647	$ 566,927
Commercial Loans Held For Sale
Commercial Loans [Line Items]
Commercial loans	[1]	39,141	166,234
Commercial Loans Held For Investment
Commercial Loans [Line Items]
Commercial loans	[1]	363,506	400,693
Loans at fair value		67,657	71,262
Commercial Loans Held-for-Investment, at Amortized Cost
Commercial Loans [Line Items]
Commercial loans		$ 295,849	$ 329,431
[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, 2015 and December 31, 2014, assets of consolidated VIEs totaled $1,195,574 and $1,900,208, respectively. At December 31, 2015 and December 31, 2014, liabilities of consolidated VIEs totaled $1,050,861 and $1,546,490, respectively. See Note 4 for further discussion.

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Commercial Loans [Line Items]

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of commercial loans and leases receivable including, but not limited to, commercial and industrial loans, agricultural loans, mortgage loans, promissory notes, interbank and other loans to financial institutions, draws against credit facilities, trade financing, lease financings. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524

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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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