XML 81 R68.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Related Party Transactions - Excluded Properties and Businesses (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) office_and_property property interest | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Retail | Manhattan |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | office_and_property | 4 |  |
Office Building |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | office_and_property | 14 |  |
Office Building | Manhattan |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | office_and_property | 9 |  |
Malkin Group | Mezzanine and Senior Equity Funds |  |  |
Related Party Transaction [Line Items] |  |  |
Number of interests owned (interest) | interest | 2 |  |
Malkin Group | Residential Property Manager |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | interest | 5 |  |
Number of interests owned (interest) | interest | 5 |  |
Malkin Group | Multi-family Property | Greenwich, Connecticut |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | 8 |  |
Malkin Group | Retail | Greenwich, Connecticut |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | 5 |  |
Malkin Group | Retail | Manhattan |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | 2 |  |
Malkin Group | Former Post Office | Greenwich, Connecticut |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | 1 |  |
Malkin Group | Office Building | Manhattan |  |  |
Related Party Transaction [Line Items] |  |  |
Number of properties (in properties) | 1 |  |
Supervisory fee revenue | Third party management and other fees | Affiliated Entity |  |  |
Related Party Transaction [Line Items] |  |  |
Revenue from related parties | $ | $ 1.1 | $ 1.1 | $ 1.4
Property management fee revenue | Third party management and other fees | Affiliated Entity |  |  |
Related Party Transaction [Line Items] |  |  |
Revenue from related parties | $ | $ 0.3 | $ 0.3 | $ 0.4

X
- Definition Number of Interests Owned + References No definition available. + Details
Name: | esrt_NumberofInterestsOwned
Namespace Prefix: | esrt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07.1(c)) -URI http://asc.fasb.org/extlink&oid=114873854&loc=SL114874292-224272 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
Name: | us-gaap_RevenueFromRelatedParties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=esrt_MalkinGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=esrt_MezzanineandSeniorEquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=esrt_ResidentialPropertyManagerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=esrt_SupervisoryFeeRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=esrt_ManagementFeesRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_AffiliatedEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=esrt_PropertyManagementFeeRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |