XML 40 R29.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Accounting Policies [Line Items] |  |
Capitalized internal leasing costs |  | $ 2,600
Minimum |  |
Accounting Policies [Line Items] |  |
Observatory revenue realized during the first quarter, previous ten years (as a percent) | 16.00% |
Observatory revenue realized during the second quarter, previous ten years (as a percent) | 26.00% |
Observatory revenue realized during the third quarter, previous ten years (as a percent) | 31.00% |
Observatory revenue realized during the fourth quarter, previous ten years (as a percent) | 23.00% |
Maximum |  |
Accounting Policies [Line Items] |  |
Observatory revenue realized during the first quarter, previous ten years (as a percent) | 18.00% |
Observatory revenue realized during the second quarter, previous ten years (as a percent) | 28.00% |
Observatory revenue realized during the third quarter, previous ten years (as a percent) | 33.00% |
Observatory revenue realized during the fourth quarter, previous ten years (as a percent) | 25.00% |
Ground lease agreements |  |
Accounting Policies [Line Items] |  |
Remaining contractual payments under ground lease agreements | $ 60,904 |

X
- Definition [Line Items] for Accounting Policies [Table] + References No definition available. + Details
Name: | esrt_AccountingPoliciesLineItems
Namespace Prefix: | esrt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred Costs, Leasing, Internal Costs, Gross + References No definition available. + Details
Name: | esrt_DeferredCostsLeasingInternalCostsGross
Namespace Prefix: | esrt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Historical Revenue Trend, Observatory Revenue, in Quarter Four Over Ten Year Period, Percent + References No definition available. + Details
Name: | esrt_HistoricalRevenueTrendObservatoryRevenueinQuarterFourOverTenYearPeriodPercent
Namespace Prefix: | esrt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Historical Revenue Trend, Observatory Revenue, in Quarter One Over Ten Year Period, Percent + References No definition available. + Details
Name: | esrt_HistoricalRevenueTrendObservatoryRevenueinQuarterOneOverTenYearPeriodPercent
Namespace Prefix: | esrt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Historical Revenue Trend, Observatory Revenue, in Quarter Three Over Ten Year Period, Percent + References No definition available. + Details
Name: | esrt_HistoricalRevenueTrendObservatoryRevenueinQuarterThreeOverTenYearPeriodPercent
Namespace Prefix: | esrt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Historical Revenue Trend, Observatory Revenue, in Quarter Two Over Ten Year Period, Percent + References No definition available. + Details
Name: | esrt_HistoricalRevenueTrendObservatoryRevenueinQuarterTwoOverTenYearPeriodPercent
Namespace Prefix: | esrt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=esrt_GroundLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |