Summary of Significant Accounting Policies - Consolidated Entities (Details) - VIE, Primary Beneficiary		3 Months Ended
Mar. 01, 2018	Mar. 31, 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%

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=77990344&loc=SL6759159-111685

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration