Line of Credit Facility, Extension Fee, Percent of Outstanding Commitments Under Revolving Credit Facility

No definition available.

Name:	esrt_LineofCreditFacilityExtensionFeePercentofOutstandingCommitmentsUnderRevolvingCreditFacility
Namespace Prefix:	esrt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Extension Period

+ References

No definition available.

+ Details

Name:	esrt_LineofCreditFacilityExtensionPeriod
Namespace Prefix:	esrt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_CreditFacilityAxis=esrt_SecuredRevolvingandTermCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=esrt_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
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Period Type:

Debt Secured Revolving and Term Credit Facility (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Oct. 06, 2013
Secured Revolving and Term Credit Facility [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity	$ 800,000,000.0	$ 800,000,000.0
Maximum borrowing capacity	1,250,000,000.00	1,250,000,000.00
Unused capacity commitment fee percentage	0.20%
Secured Revolving and Term Credit Facility [Member] \| Predecessor [Member]
Line of Credit Facility [Line Items]
Extinguishment of debt	$ 470,000,000
Term Loan [Member]
Line of Credit Facility [Line Items]
Term of facility	5 years
Term Loan [Member] \| Eurodollar [Member]
Line of Credit Facility [Line Items]
Interest rate at period end	1.35%
Term Loan [Member] \| Eurodollar [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Term Loan [Member] \| Eurodollar [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.00%
Term Loan [Member] \| Base Rate [Member]
Line of Credit Facility [Line Items]
Interest rate at period end	0.35%
Term Loan [Member] \| Base Rate [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.00%
Term Loan [Member] \| Base Rate [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Term of facility	4 years
Extension period	1 year
Extension fee percent of outstanding commitments under revolving credit facility	0.20%
Revolving Credit Facility [Member] \| Eurodollar [Member]
Line of Credit Facility [Line Items]
Interest rate at period end	1.20%
Revolving Credit Facility [Member] \| Eurodollar [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.925%
Revolving Credit Facility [Member] \| Eurodollar [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.70%
Revolving Credit Facility [Member] \| Base Rate [Member]
Line of Credit Facility [Line Items]
Interest rate at period end	0.20%
Revolving Credit Facility [Member] \| Base Rate [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.00%
Revolving Credit Facility [Member] \| Base Rate [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.70%