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Description of Business and Organization - The Predecessor Narrative (Details) ft² in Thousands, $ in Millions	Sep. 28, 2012 USD ($)	Dec. 31, 2015 ft² parcel office_and_property
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property | ft²		10,100
Development Parcel [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties | parcel		3
Predecessor [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property | ft²		380
Predecessor [Member] | Office and Retail Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties		18
Predecessor [Member] | Office and Retail Properties [Member] | Consolidated Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties		16
Predecessor [Member] | Office and Retail Properties [Member] | Unconsolidated Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties		2
Predecessor [Member] | Development Parcel [Member] | Consolidated Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties | parcel		1
Predecessor [Member] | Office Properties [Member] | Unconsolidated Properties [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties		4
Area of real estate property | ft²		380
New York State Supreme Court, New York County [Member] | Predecessor [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Damages awarded | $	$ 55.0
Percent of damages awarded required to be in cash	80.00%
ESRT [Member] | New York State Supreme Court, New York County [Member] | Predecessor [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Maximum percent of freely-tradable common stock or partnership units	20.00%

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Loss Contingency, Damages Awarded, Freely-tradable Common Stock or Operating Units, Maximum

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Loss Contingency, Damages Awarded, Percent in Cash, Minimum

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[Line Items] for Organization, Consolidation and Presentation of Financial Statements Disclosure [Table]

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Area of a real estate property.

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Amount of damages awarded to the plaintiff in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

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The number of real estate properties owned as of the balance sheet date.

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