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Debt Secured Revolving and Term Credit Facility (Details) (USD $) | 9 Months Ended
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Sep. 30, 2014
Secured Revolving and Term Credit Facility [Member] |
Line of Credit Facility [Line Items] |
Current borrowing capacity | $ 800,000,000.0
Maximum borrowing capacity | 1,250,000,000.00
Unused capacity commitment fee percentage | 0.20%
Decrease in maximum borrowing capacity | 21,600,000
Secured Revolving and Term Credit Facility [Member] | Predecessor [Member] |
Line of Credit Facility [Line Items] |
Extinguishment of debt | $ 355,600,000
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%

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- Definition Line of Credit Facility, Extension Fee, Percent of Outstanding Commitments Under Revolving Credit Facility + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Line of Credit Facility, Extension Period + References No definition available. + Details
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Period Type: | duration

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- Definition Line of Credit Facility, Increase (Decrease) in Maximum Borrowing Capacity + References No definition available. + Details
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Namespace Prefix: | esrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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
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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
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- Definition Gross amount of debt extinguished. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- 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
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- 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
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- Details
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- 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
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Balance Type: | credit
Period Type: | instant

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- 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
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