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Description of Business and Organization (Details) ft² in Millions | 6 Months Ended
--- | ---
Jun. 30, 2026 ft² office_property parcel property_unit $ / shares
Empire State Realty OP | Empire State Realty Trust |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
OP units owned by the company (as percent) | 61.00%
ESRT | Common Class A |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Par value (in dollars per share) | $ / shares | $ 0.01
Office Building |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of offices and properties | office_property | 9
Office Building | New York City |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property (in square feet) | 7.5
Retail Site | New York City |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property (in square feet) | 0.8
Multifamily | New York City |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of property units | property_unit | 743
Development Parcel |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of offices and properties | parcel | 1

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