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Related Party Transactions - Tax Protection Agreements (Details) $ in Millions		12 Months Ended
	Oct. 07, 2013 USD ($)	Dec. 31, 2013 property	Aug. 23, 2016
Malkin Group
Related Party Transaction [Line Items]
Number of properties protected | property		4
Aggregate number of operating partnership units and common stock threshold during tax protection period	50.00%
Bottom dollar guarantee of aggregate indebtedness during tax protection period | $	$ 160.0
Q REIT Holding LLC
Related Party Transaction [Line Items]
Threshold to indemnify			10.00%

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- Definition

Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners, Threshold to be Indemnified

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- Definition

Related Party Transaction, Aggregate Number of Operating Partnership Units and Common Stock Threshold During Tax Protection Period

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- Definition

Related Party Transaction, Bottom Dollar Guarantee of Aggregate Indebtedness During tax Protection Period

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- Definition

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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