XML 45 R67.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Capital - Incentive and Share-based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 4 Months Ended | 1 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 08, 2013 | Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Oct. 28, 2014 | Jan. 31, 2014 vesting_installment | Apr. 30, 2014 | Jun. 30, 2014 tranche | Apr. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Expected volatility rate look-back period (in years) | 6 years |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted, Weighted Average Grant Price, per share |  |  | $ 15.04 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 13.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |  |  |  |  |
Vested, Weighted Average Grant Price, per share |  |  | $ 13.01 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue | $ 13.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue |  |  |  |  |
Forfeited, Weighted Average Grant Price, per share |  |  | $ 13.60 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue | $ 13.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue |  |  |  |  |
Unvested balance, weighted average grant price, beginning balance, per share |  |  | $ 13.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue |  |  | $ 13.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue | $ 13.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue |  |
Unvested balance, weighted average grant price, ending balance, per share |  | $ 13.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue | $ 13.78 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue | $ 13.00 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue |  |  |  |  |
Age of grantee at which LTIP unit and restricted stock awards immediately vest |  | 60 years |  |  |  |  |  |  |
Period of service, upon completion of which, grantee's LTIP unit and restricted stock awards will immediately vest |  | 10 years |  |  |  |  |  |  |
Awards that Meet Age and Service Requirements for Vesting [Member] |  |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Noncash share-based compensation expense recognized |  | $ 2.3 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_VestingAxis = esrt_AwardsthatMeetAgeandServiceRequirementsforVestingMember | $ 0.2 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_VestingAxis = esrt_AwardsthatMeetAgeandServiceRequirementsforVestingMember |  |  |  |  |  |
Unrecognized compensation expense |  |  | 0.2 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_VestingAxis = esrt_AwardsthatMeetAgeandServiceRequirementsforVestingMember |  |  |  |  |  |
Unrecognized compensation expense, period for recognition (in years) |  |  | 1 year 9 months 18 days |  |  |  |  |  |
Awards that Do Not Meet Age and Service Requirements for Vesting [Member] |  |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Noncash share-based compensation expense recognized |  | 0.7 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_VestingAxis = esrt_AwardsthatDoNotMeetAgeandServiceRequirementsforVestingMember | 3.5 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_VestingAxis = esrt_AwardsthatDoNotMeetAgeandServiceRequirementsforVestingMember |  |  |  |  |  |
Unrecognized compensation expense |  |  | 9.6 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_VestingAxis = esrt_AwardsthatDoNotMeetAgeandServiceRequirementsforVestingMember |  |  |  |  |  |
Unrecognized compensation expense, period for recognition (in years) |  |  | 2 years 9 months 18 days |  |  |  |  |  |
Long-Term Incentive Plan Units and Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  | 5.40 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitsandRestrictedStockMember |  |  |  |  |  |
Expected term |  |  |  | 3 years |  |  |  |  |
Risk free interest rate |  |  |  | 0.66%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitsandRestrictedStockMember |  |  |  |  |
Expected volatility rate |  |  |  | 28.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitsandRestrictedStockMember |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted, Weighted Average Grant Price, per share |  |  | $ 10.65 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitsandRestrictedStockMember |  |  |  |  |  |
Fair value vested in period |  |  | 3.0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitsandRestrictedStockMember |  |  |  |  |  |
Long-Term Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  | 488,613 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember | 913,561 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember |  |  |  |  |
Vested (in shares) |  |  | (191,043)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember |  |  |  |  |
Forfeited (in shares) |  |  | (16,471)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember |  |  |  |  |
Unvested balance, beginning balance (in shares) |  |  | 913,561 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember |  |  | 913,561 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember | 913,561 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember |  |
Unvested balance, ending balance (in shares) |  | 913,561 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember | 1,194,660 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember | 913,561 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitMember |  |  |  |  |
Time Based Long-Tern Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period | 3.90 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) | 193,059 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember |  |  |  |  |  |  |  |
Performance Based Long-Term Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period | 0.60 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) | 64,352 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember |  |  |  |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  | 17,262 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 158,852 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |  |  |
Vested (in shares) |  |  | (37,458)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | (12,607)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |  |  |
Forfeited (in shares) |  |  | (21,879)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | (1,874)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |  |  |
Unvested balance, beginning balance (in shares) |  |  | 144,371 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  | 144,371 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 144,371 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |
Unvested balance, ending balance (in shares) |  | 144,371 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 102,296 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember | 144,371 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |  |  |
Performance Restricted Shares [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  |  | 0.01 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_PerformanceRestrictedSharesMember |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) | 39,706 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_PerformanceRestrictedSharesMember |  |  |  | 1,571 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_PerformanceRestrictedSharesMember |  |  |  |
Time Restricted Shares [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  |  | 0.02 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_TimeRestrictedSharesMember |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) | 119,146 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeRestrictedSharesMember |  |  |  | 1,571 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeRestrictedSharesMember |  |  |  |
Long-Term Incentive Plan Unit and Restricted Stock [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  | 11.70 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitandRestrictedStockMember |  |  |  |  |
Expected term |  |  | 3 years |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate |  |  | 2.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitandRestrictedStockMember | 2.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitandRestrictedStockMember |  |  |  |  |
Risk free interest rate |  |  | 0.80%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitandRestrictedStockMember |  |  |  |  |  |
Expected volatility rate |  |  | 26.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitandRestrictedStockMember |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted, Weighted Average Grant Price, per share |  |  |  | $ 10.89 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = esrt_LongTermIncentivePlanUnitandRestrictedStockMember |  |  |  |  |
Executive Officer [Member] | Time Based Long-Tern Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period | 5.40 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |  |  | 2.50 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |
Number of Vesting Installments | 4 esrt_NumberofVestingInstallments / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |  |  | 4 esrt_NumberofVestingInstallments / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |
Award vesting period (in years) | 3 years |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) | 440,192 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |  |  | 180,260 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |
Executive Officer [Member] | Performance Based Long-Term Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period | 0.90 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |  |  | 0.90 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |
Number of Vesting Installments | 2 esrt_NumberofVestingInstallments / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |  |  | 2 esrt_NumberofVestingInstallments / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |
Award vesting period (in years) | 3 years |  |  |  |  | 3 years |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) | 146,730 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |  |  | 180,263 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |
Employee [Member] | Time Based Long-Tern Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  |  |  |  | 0.40 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = esrt_EmployeeMember |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  | 23,487 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = esrt_EmployeeMember |  |
Employee [Member] | Performance Based Long-Term Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  |  |  |  | 0.20 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = esrt_EmployeeMember |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  | 23,484 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_PerformanceBasedLongTermIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = esrt_EmployeeMember |  |
Director [Member] | Time Based Long-Tern Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period | 0.90 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |  |  |  |  |  |  | 0.50 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |
Number of Vesting Installments |  |  |  |  |  |  |  | 3 esrt_NumberofVestingInstallments / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) | 69,228 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |  |  |  |  |  |  | 32,196 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |
ESRT [Member] | Employee [Member] | Performance Restricted Shares [Member] |  |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  | 7,059 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_PerformanceRestrictedSharesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_TitleOfIndividualAxis = esrt_EmployeeMember |  |
ESRT [Member] | Employee [Member] | Time Restricted Shares [Member] |  |  |  |  |  |  |  |  |
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  | 7,061 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeRestrictedSharesMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_TitleOfIndividualAxis = esrt_EmployeeMember |  |
2013 Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Number of shares authorized under the plan |  |  | 12,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = esrt_A2013PlanMember |  |  |  |  |  |
Number of shares that remain available for future issuance |  |  | 10,700,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = esrt_A2013PlanMember |  |  |  |  |  |
2013 Plan [Member] | Time Based Long-Tern Incentive Plan Unit [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Fair value of share-based awards granted in period |  |  |  |  |  |  |  |  | $ 0.70 esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_PlanNameAxis = esrt_A2013PlanMember
Restricted Stock and LTIP Unit Activity [Roll Forward] |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  |  | 48,923 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_PlanNameAxis = esrt_A2013PlanMember
2013 Plan [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | Share-based Compensation Award, Tranche One [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Award vesting period (in years) |  |  |  |  |  |  |  |  | 3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  |  |  |  |  |  | 30.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_PlanNameAxis = esrt_A2013PlanMember / us-gaap_VestingAxis = esrt_SharebasedCompensationAwardTrancheOneMember
2013 Plan [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | Share-based Compensation Award, Tranche Two [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Award vesting period (in years) |  |  |  |  |  |  |  |  | 4 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  |  |  |  |  |  | 30.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_PlanNameAxis = esrt_A2013PlanMember / us-gaap_VestingAxis = esrt_SharebasedCompensationAwardTrancheTwoMember
2013 Plan [Member] | Time Based Long-Tern Incentive Plan Unit [Member] | Share-based Compensation Award, Tranche Three [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Award vesting period (in years) |  |  |  |  |  |  |  |  | 5 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  |  |  |  |  |  | 40.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_AwardTypeAxis = esrt_TimeBasedLongTernIncentivePlanUnitMember / us-gaap_PlanNameAxis = esrt_A2013PlanMember / us-gaap_VestingAxis = esrt_SharebasedCompensationAwardTrancheThreeMember

X
- Definition Number of Vesting Installments + References No definition available. + Details
Name: | esrt_NumberofVestingInstallments
Namespace Prefix: | esrt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value + References No definition available. + Details
Name: | esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsGrantedinPeriodFairValue
Namespace Prefix: | esrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Look-Back Period + References No definition available. + Details
Name: | esrt_SharebasedCompensationArrangementbySharebasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateLookBackPeriod
Namespace Prefix: | esrt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Payment Arrangement by Share-based Payment Award, Equity Other than Options, Vesting Threshold, Age of Grantee + References No definition available. + Details
Name: | esrt_SharebasedPaymentArrangementbySharebasedPaymentAwardEquityOtherthanOptionsVestingThresholdAgeofGrantee
Namespace Prefix: | esrt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=esrt_LongTermIncentivePlanUnitandRestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=esrt_LongTermIncentivePlanUnitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=esrt_LongTermIncentivePlanUnitsandRestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=esrt_PerformanceBasedLongTermIncentivePlanUnitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=esrt_PerformanceRestrictedSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=esrt_TimeBasedLongTernIncentivePlanUnitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=esrt_TimeRestrictedSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=esrt_A2013PlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=esrt_EmployeeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=us-gaap_ExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VestingAxis=esrt_AwardsthatDoNotMeetAgeandServiceRequirementsforVestingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VestingAxis=esrt_AwardsthatMeetAgeandServiceRequirementsforVestingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |