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Mortgage Servicing Rights - Schedule of Fair Value of MSRs and Aggregate Principal Amounts of Associated Loans (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, at fair value	[1]	$ 111,013	$ 118,526
Associated Principal		9,782,322	10,456,889
MSRs
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, at fair value		111,013	118,526	$ 126,620	$ 191,976
MSRs | Conforming Loan
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, at fair value		44,414	58,523
Associated Principal		3,799,528	4,989,720
MSRs | Jumbo Loan
Servicing Assets at Fair Value [Line Items]
Mortgage servicing rights, at fair value		66,599	60,003
Associated Principal		$ 5,982,794	$ 5,467,169
[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, 2017 and December 31, 2016, assets of consolidated VIEs totaled $750,694 and $798,317, respectively. At March 31, 2017 and December 31, 2016, liabilities of consolidated VIEs totaled $728,923 and $773,980, 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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- Definition

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=68078379&loc=d3e122625-111746

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