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Related Party Transactions Formation Transactions (Details) (USD $) | 0 Months Ended |
--- | --- | ---
Oct. 08, 2013 | Oct. 06, 2013 | Oct. 07, 2013
Related Party Transaction [Line Items] |  |  |
Proceeds from Issuance Initial Public Offering, Net of Costs of Issuance | $ 2,800,000,000 esrt_ProceedsfromIssuanceInitialPublicOfferingNetofCostsofIssuance |  |
Common Class A [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of Common Stock (in units) |  | 82,200,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |
Chief Executive Officer [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Partners' Capital Account, Units, Sale of Units | 28,718,631 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ChiefExecutiveOfficerMember |  |
Board of Directors Chairman [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Partners' Capital Account, Units, Sale of Units | 6,027,867 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_BoardOfDirectorsChairmanMember |  |
Affiliated Entity [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Partners' Capital Account, Units, Sale of Units | 37,748,249 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember |  |
Management [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Partners' Capital Account, Units, Sale of Units | 1,167,336 us-gaap_PartnersCapitalAccountUnitsSaleOfUnits / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ManagementMember |  |
ESRT [Member] | Chief Executive Officer [Member] | Common Class A [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of Common Stock (in units) | 210,289 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ChiefExecutiveOfficerMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
ESRT [Member] | Chief Executive Officer [Member] | Common Class B [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of Common Stock (in units) | 586,095 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ChiefExecutiveOfficerMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Related Party, Ownership Interest, Diluted Basis, Percent |  |  | 12.00%esrt_RelatedPartyOwnershipInterestDilutedBasisPercent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ChiefExecutiveOfficerMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
ESRT [Member] | Board of Directors Chairman [Member] | Common Class A [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of Common Stock (in units) | 2,772 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_BoardOfDirectorsChairmanMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
ESRT [Member] | Board of Directors Chairman [Member] | Common Class B [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of Common Stock (in units) | 100,084 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_BoardOfDirectorsChairmanMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Related Party, Ownership Interest, Diluted Basis, Percent |  |  | 2.50%esrt_RelatedPartyOwnershipInterestDilutedBasisPercent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_BoardOfDirectorsChairmanMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
ESRT [Member] | Affiliated Entity [Member] | Common Class A [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of Common Stock (in units) | 396,025 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |  |
ESRT [Member] | Affiliated Entity [Member] | Common Class B [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of Common Stock (in units) | 747,435 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Related Party, Ownership Interest, Diluted Basis, Percent |  |  | 15.80%esrt_RelatedPartyOwnershipInterestDilutedBasisPercent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
ESRT [Member] | Management [Member] | Common Class B [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Issuance of Common Stock (in units) | 2,407 us-gaap_StockIssuedDuringPeriodSharesNewIssues / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ManagementMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  |
Related Party, Ownership Interest, Diluted Basis, Percent |  |  | 0.50%esrt_RelatedPartyOwnershipInterestDilutedBasisPercent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_ManagementMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Predecessor [Member] | Investor [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Payments of Capital Distribution | 180,000,000 us-gaap_PaymentsOfCapitalDistribution / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_InvestorMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |
Predecessor [Member] | Affiliated Entity [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Payments of Capital Distribution | $ 38,900,000 us-gaap_PaymentsOfCapitalDistribution / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_AffiliatedEntityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |  |

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- Definition Total units issued during the year due to the sale of units. All partners include general, limited and preferred partners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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