Long Term Debt, Fixed Rate Debt and Floating Rate Debt, Total

No definition available.

Name:	esrt_LongTermDebtFixedRateDebtandFloatingRateDebtLessCreditFacilityandUnsecuredNotesTotal
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ 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 210.5-02.22)
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-Publisher SEC
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-Publisher SEC
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Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Data Type:	num:percentItemType
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Period Type:	instant

- 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

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- Definition

The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details

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- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

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-Publisher FASB
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-Topic 835
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-Paragraph 1
-Subparagraph (SX 210.5-02.17)
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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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- 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
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-Paragraph 19, 20, 22
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+ Details

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Period Type:	instant

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

No definition available.

+ Details

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Debt - Schedule of Long term Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Aug. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Aug. 15, 2014
Debt Instrument [Line Items]
Unsecured revolving credit facility	$ 35,192			$ 0
Deferred financing costs, net	(12,910)			(12,998)
Total	747,661			898,998
Mortgages [Member]
Debt Instrument [Line Items]
Fixed rate debt	735,145			746,916
Floating rate debt	0			135,146
Total mortgage debt	735,145			882,062
Total principal	1,640,145			1,602,062
Unamortized premiums, net of unamortized discount	5,181			9,590
Deferred financing costs, net	(12,910)			(12,998)
Total	1,632,416			1,598,654
Mortgages [Member] \| 10 Union Square [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 20,289			20,641
Stated Rate	6.00%
Effective Rate	6.76%
Mortgages [Member] \| 10 Bank Street [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 32,214			32,847
Stated Rate	5.72%
Effective Rate	6.21%
Mortgages [Member] \| 1542 Third Avenue [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 18,222			18,628
Stated Rate	5.90%
Effective Rate	6.59%
Mortgages [Member] \| First Stamford Place [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 238,765			242,294
Stated Rate	5.65%
Effective Rate	6.17%
Mortgages [Member] \| 383 Main Avenue [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 29,269			29,852
Stated Rate	5.59%
Effective Rate	6.02%
Mortgages [Member] \| 1010 Third Avenue and 77 West 55th Street [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 27,064			27,595
Stated Rate	5.69%
Effective Rate	6.37%
Mortgages [Member] \| 1333 Broadway [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 68,646			69,575
Stated Rate	6.32%
Effective Rate	3.79%
Mortgages [Member] \| 1400 Broadway - First Lien [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 68,732			69,689
Stated Rate	6.12%
Effective Rate	3.37%
Mortgages [Member] \| 1400 Broadway - Second Lien [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 9,600			9,803
Stated Rate	3.35%
Effective Rate	3.36%
Mortgages [Member] \| 112 West 34th Street - First Lien [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 76,406			77,484
Stated Rate	6.01%
Effective Rate	3.33%
Mortgages [Member] \| 112 West 34th Street - Second Lien [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 9,640			9,763
Stated Rate	6.56%
Effective Rate	3.63%
Mortgages [Member] \| 1350 Broadway [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 38,348			38,900
Stated Rate	5.87%
Effective Rate	3.77%
Mortgages [Member] \| Metro Center [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 97,950			99,845
Stated Rate	3.59%
Effective Rate	3.68%
Mortgages [Member] \| 1359 Broadway [Member]
Debt Instrument [Line Items]
Floating rate debt	$ 0			44,146
Mortgages [Member] \| One Grand Central Place [Member]
Debt Instrument [Line Items]
Floating rate debt	0			91,000
Mortgages [Member] \| Secured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Floating rate debt	0			170,000
Mortgages [Member] \| Secured Term Credit Facility [Member]
Debt Instrument [Line Items]
Floating rate debt	0			300,000
Senior Notes [Member] \| Series A Senior Notes due 2025 [Member]
Debt Instrument [Line Items]
Total	$ 100,000			0
Stated Rate	3.93%		3.93%
Effective Rate	3.93%
Senior Notes [Member] \| Series B Senior Notes due 2027 [Member]
Debt Instrument [Line Items]
Total	$ 125,000			0
Stated Rate	4.09%		4.09%
Effective Rate	4.09%
Senior Notes [Member] \| Series C Senior Notes due 2030 [Member]
Debt Instrument [Line Items]
Total	$ 125,000			0
Stated Rate	4.18%		4.18%
Effective Rate	4.18%
Convertible Debt [Member] \| Exchangeable Senior Notes due August 15, 2019 [Member]
Debt Instrument [Line Items]
Fixed rate debt	$ 250,000			250,000
Stated Rate	2.63%				2.625%
Effective Rate	3.93%				3.80%
Revolving Credit Facility [Member] \| Unsecured Term Loan Facility [Member]
Debt Instrument [Line Items]
Unsecured revolving credit facility	$ 265,000	$ 265,000		0
Effective Rate	2.03%
Pay Rate	2.1485%
Revolving Credit Facility [Member] \| Unsecured Term Loan Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.60%
Revolving Credit Facility [Member] \| Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Unsecured revolving credit facility	$ 40,000			$ 0
Effective Rate	1.58%
Revolving Credit Facility [Member] \| Unsecured Revolving Credit Facility [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.15%