XML 40 R28.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Description of Business and Organization - Narrative (Details) | 9 Months Ended
--- | ---
Sep. 30, 2018 ft² parcel office_and_property
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property (in square feet) | 10,100,000
OP units owned by the Company (as a percent) | 55.80%
Office Building |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property (in square feet) | 9,400,000
Number of properties | office_and_property | 14
Office Building | Manhattan |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property (in square feet) | 7,600,000
Number of properties | office_and_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 square feet) | 1,900,000
Number of properties | office_and_property | 5
Development Parcel |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of properties | parcel | 3
Retail Site | Manhattan and Westport, Connecticut |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property (in square feet) | 205,748
Retail Site | Manhattan |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property (in square feet) | 513,437
Number of properties | office_and_property | 4
Retail Site | Westport, Connecticut |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Number of properties | office_and_property | 2
Other Property | Stamford, Connecticut |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Area of real estate property (in square feet) | 380,000

X
- Definition [Line Items] for Organization, Consolidation and Presentation of Financial Statements Disclosure [Table] + References No definition available. + Details
Name: | esrt_OrganizationConsolidationandPresentationofFinancialStatementsDisclosureLineItems
Namespace Prefix: | esrt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=esrt_ManhattanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=esrt_FairfieldCountyConnecticutandWestchesterCountyNewYorkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=esrt_DevelopmentParcelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_RetailSiteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=esrt_ManhattanandWestportConnecticutMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=esrt_WestportConnecticutMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OtherPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=esrt_StamfordConnecticutMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |