Description of Business and Organization (Details) ft² in Millions	6 Months Ended
Jun. 30, 2026 ft² office_property parcel property_unit
Empire State Realty OP \| Empire State Realty Trust
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
OP units owned by the company (as a percent)	61.00%
Office Building
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of properties \| office_property	9
Office Building \| New York City
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in square feet)	7.5
Retail Site \| New York City
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Area of real estate property (in square feet)	0.8
Multifamily \| New York City
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of property units \| property_unit	743
Long-term Ground Leasehold Interests
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of properties \| parcel	1

Number Of Units, Real Estate Properties

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Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]

+ References

No definition available.

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- Definition

Area of a real estate property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 970
-SubTopic 360
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28(Column A)(Footnote 2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478979/970-360-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 970
-SubTopic 360
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478150/970-360-30-2

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482987/272-10-50-3

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- Definition

The number of real estate properties owned as of the balance sheet date.

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