Description of Business and Organization - Narrative (Details) ft² in Millions	12 Months Ended
	Dec. 31, 2022 ft² property entity property_unit parcel	Feb. 01, 2023 property
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in sqft) | ft²	9.7
Percentage of real estate property occupied	85.20%
Percentage of real estate property, including lease not yet commenced	88.60%
Number of entities to be treated as taxable REIT subsidiary | entity	2
Empire state realty trust | Empire state realty OP
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
OP units owned by the company (as a percent)	59.40%
Office building
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in sqft) | ft²	8.9
Percentage of real estate property occupied	85.10%
Percentage of real estate property, including lease not yet commenced	88.30%
Number of offices and properties | property	12
Office building | Manhattan
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in sqft) | ft²	7.6
Number of offices and properties | property	9
Office building | Fairfield County, Connecticut and Westchester County, New York
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in sqft) | ft²	1.3
Number of offices and properties | property	3
Office building | Stamford, Connecticut
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in sqft) | ft²	0.4
Long-term ground leasehold interests
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties | parcel	3
Office Building and Multifamily | Manhattan
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in sqft) | ft²	0.5
Retail site
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Percentage of real estate properties leased	97.60%
Retail site | Manhattan and Westport, Connecticut
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in sqft) | ft²	0.2
Retail site | Manhattan
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties | property	4
Retail site | Westport, Connecticut
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties | property	2
Retail site | Westport, Connecticut | Subsequent Event | Disposal Group, Disposed of by Sale, Not Discontinued Operations | 69-97 and 103-107 Main Street
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties | property		2
Multifamily
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of offices and properties | property	3
Percentage of real estate properties leased	96.30%
Number of property units | property_unit	721