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v2.4.1.9

Description of Business and Organization Narrative (Details) | Mar. 31, 2015 sqft
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Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 10,000,000 us-gaap_AreaOfRealEstateProperty
Office Building [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 9,300,000 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember
Number of properties | 14 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember
Office Building [Member] | Manhattan [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 7,400,000 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember / us-gaap_StatementGeographicalAxis = esrt_ManhattanMember
Number of properties | 9 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember / us-gaap_StatementGeographicalAxis = esrt_ManhattanMember
Office Building [Member] | Fairfield County, Connecticut and Westchester County, New York [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 1,900,000 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember / us-gaap_StatementGeographicalAxis = esrt_FairfieldCountyConnecticutandWestchesterCountyNewYorkMember
Number of properties | 5 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember / us-gaap_StatementGeographicalAxis = esrt_FairfieldCountyConnecticutandWestchesterCountyNewYorkMember
Development Parcel [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of properties | 3 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = esrt_DevelopmentParcelMember
Retail Site [Member] | Manhattan and Westport, Connecticut [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 204,175 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember / us-gaap_StatementGeographicalAxis = esrt_ManhattanandWestportConnecticutMember
Retail Site [Member] | Manhattan [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 522,601 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember / us-gaap_StatementGeographicalAxis = esrt_ManhattanMember
Number of properties | 4 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember / us-gaap_StatementGeographicalAxis = esrt_ManhattanMember
Retail Site [Member] | Westport, Connecticut [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of properties | 2 us-gaap_NumberOfRealEstateProperties / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember / us-gaap_StatementGeographicalAxis = esrt_WestportConnecticutMember
Other Property [Member] | Stamford, Connecticut [Member] |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property | 380,000 us-gaap_AreaOfRealEstateProperty / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OtherPropertyMember / us-gaap_StatementGeographicalAxis = esrt_StamfordConnecticutMember

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- Definition Area of a real estate property. + References No definition available. + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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