Related Party Transactions - Formation Transactions (Details) $ in Millions	Oct. 07, 2013 USD ($) shares
Related Party Transaction [Line Items]
Proceeds from issuance initial public offering, net of costs of issuance \| $	$ 2,800.0
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Partners' capital account, units, sale of units (shares)	37,748,249
Chief Executive Officer [Member]
Related Party Transaction [Line Items]
Partners' capital account, units, sale of units (shares)	28,718,631
Board of Directors Chairman [Member]
Related Party Transaction [Line Items]
Partners' capital account, units, sale of units (shares)	6,027,867
Senior Management [Member]
Related Party Transaction [Line Items]
Partners' capital account, units, sale of units (shares)	1,167,336
ESRT [Member] \| Affiliated Entity [Member] \| Common Class A [Member]
Related Party Transaction [Line Items]
Issuance of Common Stock (in units)	396,025
ESRT [Member] \| Affiliated Entity [Member] \| Common Class B [Member]
Related Party Transaction [Line Items]
Issuance of Common Stock (in units)	747,435
Related party, ownership interest, diluted basis, percent	15.80%
ESRT [Member] \| Chief Executive Officer [Member] \| Common Class A [Member]
Related Party Transaction [Line Items]
Issuance of Common Stock (in units)	210,289
ESRT [Member] \| Chief Executive Officer [Member] \| Common Class B [Member]
Related Party Transaction [Line Items]
Issuance of Common Stock (in units)	586,095
Related party, ownership interest, diluted basis, percent	12.00%
ESRT [Member] \| Board of Directors Chairman [Member] \| Common Class A [Member]
Related Party Transaction [Line Items]
Issuance of Common Stock (in units)	2,772
ESRT [Member] \| Board of Directors Chairman [Member] \| Common Class B [Member]
Related Party Transaction [Line Items]
Issuance of Common Stock (in units)	100,084
Related party, ownership interest, diluted basis, percent	2.50%
ESRT [Member] \| Senior Management [Member] \| Common Class B [Member]
Related Party Transaction [Line Items]
Issuance of Common Stock (in units)	2,407
Related party, ownership interest, diluted basis, percent	0.50%
Predecessor [Member] \| Investor [Member]
Related Party Transaction [Line Items]
Payments of capital distribution \| $	$ 180.0
Predecessor [Member] \| Affiliated Entity [Member]
Related Party Transaction [Line Items]
Payments of capital distribution \| $	$ 38.9

Proceeds from Issuance Initial Public Offering, Net of Costs of Issuance

No definition available.

Name:	esrt_ProceedsfromIssuanceInitialPublicOfferingNetofCostsofIssuance
Namespace Prefix:	esrt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Related Party, Ownership Interest, Diluted Basis, Percent

+ References

No definition available.

+ Details

Name:	esrt_RelatedPartyOwnershipInterestDilutedBasisPercent
Namespace Prefix:	esrt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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 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 2: 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

Name:	us-gaap_PartnersCapitalAccountUnitsSaleOfUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash outflow to owners or shareholders, excluding ordinary dividends. Includes special dividends.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfCapitalDistribution
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_AffiliatedEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_ManagementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_InvestorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: