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Segment Information - Supplemental Information by Segment (Detail) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Residential loans |  | $ 4,040,138 | $ 3,928,803
Commercial loans |  | 325,063 | 402,647
Real estate securities | [1] | 883,801 | 1,233,256
Mortgage servicing rights | [1] | 110,046 | 191,976
Total assets | [1] | 5,897,592 | 6,220,047
Operating Segments | Residential Mortgage Banking |  |  |
Segment Reporting Information [Line Items] |  |  |
Residential loans |  | 882,380 | 1,115,738
Commercial loans |  | 0 | 0
Real estate securities |  | 0 | 197,007
Mortgage servicing rights |  | 0 | 0
Total assets |  | 918,746 | 1,347,492
Operating Segments | Residential Investments |  |  |
Segment Reporting Information [Line Items] |  |  |
Residential loans |  | 2,277,561 | 1,791,195
Commercial loans |  | 0 | 0
Real estate securities |  | 835,681 | 1,028,171
Mortgage servicing rights |  | 110,046 | 191,976
Total assets |  | 3,448,727 | 3,140,604
Operating Segments | Commercial Mortgage Banking and Investments |  |  |
Segment Reporting Information [Line Items] |  |  |
Residential loans |  | 0 | 0
Commercial loans |  | 325,063 | 402,647
Real estate securities |  | 48,120 | 8,078
Mortgage servicing rights |  | 0 | 0
Total assets |  | 375,576 | 415,716
Corporate/Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Residential loans |  | 880,197 | 1,021,870
Commercial loans |  | 0 | 0
Real estate securities |  | 0 | 0
Mortgage servicing rights |  | 0 | 0
Total assets |  | $ 1,154,543 | $ 1,316,235
[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 June 30, 2016 and December 31, 2015, assets of consolidated VIEs totaled $888,026 and $1,195,574, respectively. At June 30, 2016 and December 31, 2015, liabilities of consolidated VIEs totaled $860,256 and $1,050,861, respectively. See Note 4 for further discussion.

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- Definition 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5066-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of consumer loans, including, but not limited to, mortgage, home equity, vehicles, credit card, installment, and lease financing. 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 3 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5066-111524 Reference 2: 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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