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Mortgage Servicing Rights - Schedule of Fair Value of MSRs and Aggregate Principal Amounts of Associated Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, at fair value	[1]	$ 106,009		$ 191,976
Associated Principal		13,917,172		18,266,472
MSRs
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, at fair value		106,009	$ 110,046	191,976	$ 162,726	$ 168,462	$ 139,293
MSRs | Conforming Loan
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, at fair value		69,578		133,838
Associated Principal		8,422,222		12,560,533
MSRs | Jumbo Loan
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, at fair value		36,431		58,138
Associated Principal		$ 5,494,950		$ 5,705,939
[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, 2016 and December 31, 2015, assets of consolidated VIEs totaled $847,399 and $1,195,574, respectively. At September 30, 2016 and December 31, 2015, liabilities of consolidated VIEs totaled $820,391 and $1,050,861, respectively. See Note 4 for further discussion.

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- Definition

Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=56950315&loc=d3e122625-111746

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