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Investments in Non-controlled Entities Schedule of Equity Method Investments (Details) | 0 Months Ended
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Oct. 06, 2013 entity
Schedule of Equity Method Investments [Line Items] |
Number of entities acquired | 4 us-gaap_NumberOfBusinessesAcquired
Empire State Building, L.L.C. [Member] |
Schedule of Equity Method Investments [Line Items] |
Ownership percentage | 23.75%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = esrt_EmpireStateBuildingL.L.C.Member
1333 Broadway Associates [Member] |
Schedule of Equity Method Investments [Line Items] |
Ownership percentage | 50.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = esrt_Location1333BroadwayAssociatesMember
1350 Broadway Associates [Member] |
Schedule of Equity Method Investments [Line Items] |
Ownership percentage | 50.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = esrt_Location1350BroadwayAssociatesMember
501 Seventh Avenue Associates [Member] |
Schedule of Equity Method Investments [Line Items] |
Ownership percentage | 20.469%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = esrt_Location501SeventhAvenueAssociatesMember

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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of businesses acquired by the entity during the period. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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Data Type: | na
Balance Type: |
Period Type: |