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v3.19.1

Leases - Narrative (Details) | Mar. 31, 2019 property
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Operating Leases [Line Items] |
Number of properties subject to ground leases | 3
Minimum |
Operating Leases [Line Items] |
Term of lease | 1 year
Maximum |
Operating Leases [Line Items] |
Term of lease | 21 years

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- Definition [Line Items] for Operating Leases [Table] + References No definition available. + Details
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Namespace Prefix: | esrt_
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Balance Type: | na
Period Type: | duration

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- Definition Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919359-209981 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of separate real estate development properties located on land subject to ground leases. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | instant

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- Details
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Balance Type: |
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- Details
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