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v2.4.1.9

Capital (Details) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended | 12 Months Ended | 1 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 30, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Aug. 31, 2014 | Sep. 02, 2014
Shares and Units [Abstract] |  |  |  |  |  |  |  |  |
OP units outstanding (shares) | 267,100,000 us-gaap_UnitsOfPartnershipInterestAmount |  |  |  |  | 267,100,000 us-gaap_UnitsOfPartnershipInterestAmount |  |  |
OP units owned by the Company (shares) | 107,200,000 us-gaap_GeneralPartnersCapitalAccountUnitsOutstanding |  |  |  |  | 107,200,000 us-gaap_GeneralPartnersCapitalAccountUnitsOutstanding |  |  |
OP units owned by the Company, percent |  |  |  |  |  | 40.10%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest |  |  |
OP units not owned by the Company (shares) | 159,900,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding |  |  |  |  | 159,900,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding |  |  |
OP units not owned by the Company, percent |  |  |  |  |  | 59.90%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest |  |  |
Private Perpetual Preferred Units, Liquidation Preference Per Share | $ 16.62 esrt_PrivatePerpetualPreferredUnitsLiquidationPreferencePerShare |  |  |  |  | $ 16.62 esrt_PrivatePerpetualPreferredUnitsLiquidationPreferencePerShare | $ 16.62 esrt_PrivatePerpetualPreferredUnitsLiquidationPreferencePerShare |  |
Dividend declared |  |  |  |  | $ 0.085 us-gaap_CommonStockDividendsPerShareDeclared |  |  |  |
Dividends and Distributions [Abstract] |  |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | $ 0.0850 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.0850 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.0850 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.0850 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.0795 us-gaap_CommonStockDividendsPerShareCashPaid |  |  |  |
Private Perpetual Preferred Unit, Dividends, Per Unit, Declared |  |  |  |  |  |  | $ 0.1500 esrt_PrivatePerpetualPreferredUnitDividendsPerUnitDeclared |  | $ 0.1500 esrt_PrivatePerpetualPreferredUnitDividendsPerUnitDeclared
Distributions paid to OP unit holders |  |  |  |  |  | $ 87.7 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders | $ 19.5 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders |  |
Private Perpetual Preferred Units [Member] |  |  |  |  |  |  |  |  |
Shares and Units [Abstract] |  |  |  |  |  |  |  |  |
Private Perpetual Preferred Units Issued During Period, Units, New Issues |  |  |  |  |  |  |  | 1,560,360 esrt_PrivatePerpetualPreferredUnitsIssuedDuringPeriodUnitsNewIssues / us-gaap_StatementClassOfStockAxis = esrt_PrivatePerpetualPreferredUnitsMember |
Private Perpetual Preferred Units, Liquidation Preference Per Share |  |  |  |  |  |  |  | $ 16.62 esrt_PrivatePerpetualPreferredUnitsLiquidationPreferencePerShare / us-gaap_StatementClassOfStockAxis = esrt_PrivatePerpetualPreferredUnitsMember |
Dividend declared |  |  |  |  |  |  |  | $ 0.60 us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_StatementClassOfStockAxis = esrt_PrivatePerpetualPreferredUnitsMember |
Private Perpetual Preferred Unit, Offering Expense |  |  |  |  |  |  |  | $ 1.4 esrt_PrivatePerpetualPreferredUnitOfferingExpense / us-gaap_StatementClassOfStockAxis = esrt_PrivatePerpetualPreferredUnitsMember |

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