Description of Business and Organization	3 Months Ended
Description of Business and Organization	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Organization	Description of Business and Organization As used in these condensed consolidated financial statements, unless the context otherwise requires, “we,” “us,” “our,” the “company,” and "ESRT" mean Empire State Realty Trust, Inc. and its consolidated subsidiaries. We are a self-administered and self-managed real estate investment trust, or REIT, that owns, manages, operates, acquires and repositions office, retail and multifamily properties in Manhattan and the greater New York metropolitan area. As the owner of the Empire State Building, the World’s Most Famous Building, we also own and operate our iconic, newly reimagined Observatory Experience. As of March 31, 2023, our office and retail portfolio contained 9.6 million rentable square feet of office and retail space. We owned 12 office properties (including three long-term ground leasehold interests) encompassing approximately 8.9 million rentable square feet of office space. Nine of these properties are located in the midtown Manhattan market and encompass in the aggregate approximately 7.6 million rentable square feet of office space, including the Empire State Building. Our Manhattan office and multifamily properties also contain an aggregate of approximately 0.5 million rentable square feet of retail space on their ground floor and/or contiguous levels. Our remaining three office properties are located in Fairfield County, Connecticut and Westchester County, New York, encompassing in the aggregate approximately 1.3 million rentable square feet. The majority of square footage for these three properties is located in densely populated metropolitan communities with immediate access to mass transportation. Additionally, we have entitled land at the Stamford Transportation Center in Stamford, Connecticut, adjacent to one of our office properties, that will support the development of an approximately 0.4 million rentable square foot office building and garage. As of March 31, 2023, our portfolio included four standalone retail properties located in Manhattan encompassing approximately 0.2 million rentable square feet in the aggregate. Additionally, as of March 31, 2023, our portfolio included three multifamily properties located in Manhattan totaling 721 units. We were organized as a Maryland corporation on July 29, 2011 and commenced operations upon completion of our initial public offering and related formation transactions on October 7, 2013. Our operating partnership, Empire State Realty OP, L.P. (the "Operating Partnership"), holds substantially all of our assets and conducts substantially all of our business. As of March 31, 2023, we owned approximately 59.3% of the aggregate operating partnership units in the Operating Partnership. We, as the sole general partner in the Operating Partnership, have responsibility and discretion in the management and control of the Operating Partnership, and the limited partners in the Operating Partnership, in such capacity, have no authority to transact business for, or participate in the management activities of, the Operating Partnership. Accordingly, the Operating Partnership has been consolidated by us. We elected to be taxed as a REIT and operate in a manner that we believe allows us to qualify as a REIT for federal income tax purposes commencing with our taxable year ended December 31, 2013.