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Other Assets and Liabilities - Components of Other Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |
Mortgage servicing rights |  | $ 63,785 | $ 63,598
Security purchase deposit |  | 57,982 | 0
Margin receivable |  | 48,655 | 85,044
FHLBC stock |  | 43,393 | 43,393
Pledged collateral |  | 42,127 | 42,615
Participation in loan warehouse facility |  | 39,219 | 0
Investment receivable |  | 36,463 | 1,147
Investment in 5 Arches |  | 10,772 | 0
Fixed assets and leasehold improvements |  | 5,409 | 2,645
REO |  | 2,915 | 3,354
Guarantee asset |  | 2,885 | 2,869
Other |  | 12,270 | 13,899
Total Other Assets | [1] | 365,875 | $ 258,564
Fixed assets |  | 10,000 |
Accumulated depreciation |  | $ 5,000 |
[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, 2018 and December 31, 2017, assets of consolidated VIEs totaled $3,693,140 and $1,259,774, respectively. At September 30, 2018 and December 31, 2017, liabilities of consolidated VIEs totaled $3,417,835 and $1,167,157, respectively. See Note 4 for further discussion.

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