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Summary of Significant Accounting Policies - Consolidated Entities (Details) - VIE, Primary Beneficiary |  | 9 Months Ended
--- | --- | ---
Mar. 01, 2018 | Sep. 30, 2018
1455 Market |  |
Variable Interest Entity [Line Items] |  |
Ownership Interest |  | 55.00%
Hill7 |  |
Variable Interest Entity [Line Items] |  |
Ownership Interest |  | 55.00%
HPP-MAC WSP, LLC |  |
Variable Interest Entity [Line Items] |  |
Ownership Interest | 75.00% | 75.00%

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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=108788376&loc=SL6759159-111685 + Details
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- Details
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- Details
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