Debt Instrument, Option to Extend, Number

No definition available.

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- Definition

Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Indebtedness to Asset Value

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Recourse Debt to Asset Value

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Line of Credit Facility, Covenant Compliance, Maximum Leverage Ratio

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Covenant Compliance, Maximum Ratio of Unsecured Debt to Unencumbered Asset Value

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Line of Credit Facility, Covenant Compliance, Minimum Adjusted EBITDA to Consolidated Fixed Charges

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Covenant Compliance, Minimum Net Operating Income to Unsecured Debt

+ References

No definition available.

+ Details

Name:	esrt_LineofCreditFacilityCovenantComplianceMinimumNetOperatingIncometoUnsecuredDebt
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- Definition

Line of Credit Facility, Covenant Compliance, Minimum Tangible Net Worth

+ References

No definition available.

+ Details

Name:	esrt_LineofCreditFacilityCovenantComplianceMinimumTangibleNetWorth
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line of Credit Facility, Covenant Compliance, Tangible Net Worth. Minimum Percent of Net Equity Proceeds Received

+ References

No definition available.

+ Details

Name:	esrt_LineofCreditFacilityCovenantComplianceTangibleNetWorth.MinimumPercentofNetEquityProceedsReceived
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Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	esrt_LineofCreditFacilityExtensionFeePercentofOutstandingCommitmentsUnderRevolvingCreditFacility
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Extension Period

+ References

No definition available.

+ Details

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- 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
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Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- 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

+ Details

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

- Details

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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

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

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

- Details

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Namespace Prefix:
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- Details

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- Details

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Debt - Revolving and Term Credit Facilities (Details) (USD $)	0 Months Ended
	Jan. 23, 2015	Mar. 31, 2015	Jan. 23, 2015 option	Dec. 31, 2014
Line of Credit Facility [Line Items]
Term loan and credit facility		$ 0us-gaap_LineOfCredit		$ 470,000,000us-gaap_LineOfCredit
Secured Revolving and Term Credit Facility [Member]
Line of Credit Facility [Line Items]
Write off of deferred debt issuance cost	1,300,000
Unsecured Revolving Credit Facility [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity	800,000,000		800,000,000
Maximum borrowing capacity	1,250,000,000		1,250,000,000
Term loan and credit facility		165,000,000		0
Option to extend maturity, number	2		2
Extension period	6 months
Extension fee percent of outstanding commitments under revolving credit facility	0.075%
Line of Credit Facility, Covenant Compliance, Maximum Leverage Ratio	60.00%
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Indebtedness to Asset Value	40.00%
Line of Credit Facility, Covenant Compliance, Minimum Tangible Net Worth	745,400,000.0		745,400,000.0
Line of Credit Facility, Covenant Compliance, Tangible Net Worth. Minimum Percent of Net Equity Proceeds Received	75.00%
Line of Credit Facility, Covenant Compliance, Minimum Adjusted EBITDA to Consolidated Fixed Charges	1.50
Line of Credit Facility, Covenant Compliance, Minimum Net Operating Income to Unsecured Debt	1.75
Line of Credit Facility, Covenant Compliance, Maximum Ratio of Unsecured Debt to Unencumbered Asset Value	60.00%
Line of Credit Facility, Covenant Compliance, Maximum Consolidated Secured Recourse Debt to Asset Value	10.00%
Unsecured Revolving Credit Facility [Member] \| Revolving Credit Facility [Member] \| Eurodollar [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.875%
Unsecured Revolving Credit Facility [Member] \| Revolving Credit Facility [Member] \| Eurodollar [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.60%
Unsecured Revolving Credit Facility [Member] \| Revolving Credit Facility [Member] \| Base Rate [Member] \| Minimum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.00%
Unsecured Revolving Credit Facility [Member] \| Revolving Credit Facility [Member] \| Base Rate [Member] \| Maximum [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.60%
Secured Revolving and Term Credit Facility [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Term loan and credit facility				$ 470,000,000