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Summary of Significant Accounting Policies (Details) | Dec. 31, 2025
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Accounting Policies [Abstract] |
Observatory revenue realized during the first quarter, previous ten years (as percent) | 18.00%
Observatory revenue realized during the second quarter, previous ten years (as percent) | 26.00%
Observatory revenue realized during the third quarter, previous ten years (as percent) | 28.00%
Observatory revenue realized during the fourth quarter, previous ten years (as percent) | 28.00%

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

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- 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: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- 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: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- 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: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration