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Residential Loans - Summary of Classifications and Carrying Value of Residential Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | $ 5,145,740 | $ 5,115,210
Residential Loans Held For Sale |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment | [1] | 1,130,185 | 1,427,945
Residential Loans Held For Sale | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 1,130,185 | 1,427,945
Residential Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 1,130,000 | 1,430,000
Residential Loans | Residential loans | Jumbo Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 1,129,890 | 1,427,052
Residential loans, at lower of cost or fair value |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 300 | 1,000
Residential loans, at lower of cost or fair value | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 295 | 893
Residential Loans Held For Investment at Fair Value | Residential loans | Jumbo Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 4,015,555 | 3,687,265
Legacy Sequoia | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 626,151 | 632,817
Legacy Sequoia | Residential Loans Held For Sale | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 0 | 0
Legacy Sequoia | Residential Loans | Residential loans | Jumbo Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 0 | 0
Legacy Sequoia | Residential loans, at lower of cost or fair value | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 0 | 0
Legacy Sequoia | Residential Loans Held For Investment at Fair Value |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 626,000 | 633,000
Legacy Sequoia | Residential Loans Held For Investment at Fair Value | Residential loans | Jumbo Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 626,151 | 632,817
Sequoia Choice | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 1,013,619 | 620,062
Sequoia Choice | Residential Loans Held For Sale | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 0 | 0
Sequoia Choice | Residential Loans | Residential loans | Jumbo Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 0 | 0
Sequoia Choice | Residential loans, at lower of cost or fair value | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 0 | 0
Sequoia Choice | Residential Loans Held For Investment at Fair Value |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 1,010,000 | 620,000
Sequoia Choice | Residential Loans Held For Investment at Fair Value | Residential loans | Jumbo Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 1,013,619 | 620,062
Redwood | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 3,505,970 | 3,862,331
Redwood | Residential Loans Held For Sale | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 1,130,185 | 1,427,945
Redwood | Residential Loans | Residential loans | Jumbo Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 1,129,890 | 1,427,052
Redwood | Residential loans, at lower of cost or fair value | Residential loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | 295 | 893
Redwood | Residential Loans Held For Investment at Fair Value |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  |  | 2,430,000
Redwood | Residential Loans Held For Investment at Fair Value | Residential loans | Jumbo Loans |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Loan market valuation adjustment |  | $ 2,375,785 | $ 2,434,386
[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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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: 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=65884687&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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