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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 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = esrt_SecuredRevolvingandTermCreditFacilityMember | $ 800,000,000.0 us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = esrt_SecuredRevolvingandTermCreditFacilityMember
Maximum borrowing capacity | 1,250,000,000.00 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = esrt_SecuredRevolvingandTermCreditFacilityMember | 1,250,000,000.00 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = esrt_SecuredRevolvingandTermCreditFacilityMember
Unused capacity commitment fee percentage | 0.20%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = esrt_SecuredRevolvingandTermCreditFacilityMember |
Secured Revolving and Term Credit Facility [Member] | Predecessor [Member] |  |
Line of Credit Facility [Line Items] |  |
Extinguishment of debt | $ 470,000,000 us-gaap_ExtinguishmentOfDebtAmount / us-gaap_CreditFacilityAxis = esrt_SecuredRevolvingandTermCreditFacilityMember / us-gaap_StatementScenarioAxis = us-gaap_PredecessorMember |
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%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_CreditFacilityAxis = esrt_TermLoanMember / us-gaap_VariableRateAxis = us-gaap_EurodollarMember |
Term Loan [Member] | Eurodollar [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on variable rate | 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = esrt_TermLoanMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_EurodollarMember |
Term Loan [Member] | Eurodollar [Member] | Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on variable rate | 2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = esrt_TermLoanMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_EurodollarMember |
Term Loan [Member] | Base Rate [Member] |  |
Line of Credit Facility [Line Items] |  |
Interest rate at period end | 0.35%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_CreditFacilityAxis = esrt_TermLoanMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |
Term Loan [Member] | Base Rate [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on variable rate | 0.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = esrt_TermLoanMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |
Term Loan [Member] | Base Rate [Member] | Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on variable rate | 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = esrt_TermLoanMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |
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%esrt_LineofCreditFacilityExtensionFeePercentofOutstandingCommitmentsUnderRevolvingCreditFacility / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Revolving Credit Facility [Member] | Eurodollar [Member] |  |
Line of Credit Facility [Line Items] |  |
Interest rate at period end | 1.20%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = us-gaap_EurodollarMember |
Revolving Credit Facility [Member] | Eurodollar [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on variable rate | 0.925%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_EurodollarMember |
Revolving Credit Facility [Member] | Eurodollar [Member] | Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on variable rate | 1.70%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_EurodollarMember |
Revolving Credit Facility [Member] | Base Rate [Member] |  |
Line of Credit Facility [Line Items] |  |
Interest rate at period end | 0.20%us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |
Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on variable rate | 0.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |
Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Basis spread on variable rate | 0.70%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_BaseRateMember |

X
- Definition Line of Credit Facility, Extension Fee, Percent of Outstanding Commitments Under Revolving Credit Facility + References No definition available. + Details
Name: | esrt_LineofCreditFacilityExtensionFeePercentofOutstandingCommitmentsUnderRevolvingCreditFacility
Namespace Prefix: | esrt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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

X
- 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

X
- 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

X
- 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

X
- 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

X
- Definition The effective interest rate at the end of the reporting period. + 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_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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

X
- 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

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

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

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |