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v2.4.1.9

Condensed Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Tenant and other receivables allowance | 1,427 us-gaap_AllowanceForDoubtfulAccountsReceivable | 499 us-gaap_AllowanceForDoubtfulAccountsReceivable
Deferred rent receivables allowance | 420 esrt_AllowanceforDeferredRentReceivables | 216 esrt_AllowanceforDeferredRentReceivables
General partner operating partnership units, outstanding | 107,200,000 us-gaap_GeneralPartnersCapitalAccountUnitsOutstanding |
Limited partner operating partnership units, outstanding | 159,900,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding |
Private Perpetual Preferred Units, Liquidation Preference Per Share | 16.62 esrt_PrivatePerpetualPreferredUnitsLiquidationPreferencePerShare | 16.62 esrt_PrivatePerpetualPreferredUnitsLiquidationPreferencePerShare
Private Perpetual Preferred Units [Member] |  |
Issuance of Common Stock (in units) | 1,560,360 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = esrt_PrivatePerpetualPreferredUnitsMember | 1,560,360 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = esrt_PrivatePerpetualPreferredUnitsMember
Series PR Operating Partnership Units [Member] |  |
Limited partner operating partnership units, outstanding | 100,211,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = esrt_SeriesPRCommonUnitsMember | 84,589,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = esrt_SeriesPRCommonUnitsMember
Series ES Operating Partnership Units [Member] |  |
Limited partner operating partnership units, outstanding | 42,365,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = esrt_SeriesESOperatingPartnershipUnitsMember | 46,134,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = esrt_SeriesESOperatingPartnershipUnitsMember
Series 60 Operating Partnership Units [Member] |  |
Limited partner operating partnership units, outstanding | 11,465,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = esrt_Series60OperatingPartnershipUnitsMember | 12,570,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = esrt_Series60OperatingPartnershipUnitsMember
Series 250 Operating Partnership Units [Member] |  |
Limited partner operating partnership units, outstanding | 5,790,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = esrt_Series250OperatingPartnershipUnitsMember | 6,578,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_StatementClassOfStockAxis = esrt_Series250OperatingPartnershipUnitsMember
ESRT [Member] | Series PR Operating Partnership Units [Member] |  |
General partner operating partnership units, outstanding | 2,455,000 us-gaap_GeneralPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_StatementClassOfStockAxis = esrt_SeriesPRCommonUnitsMember | 2,455,000 us-gaap_GeneralPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_StatementClassOfStockAxis = esrt_SeriesPRCommonUnitsMember
Limited partner operating partnership units, outstanding | 0 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_StatementClassOfStockAxis = esrt_SeriesPRCommonUnitsMember | 93,151,000 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_StatementClassOfStockAxis = esrt_SeriesPRCommonUnitsMember

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