Document and Entity Information - shares	6 Months Ended
Jun. 30, 2018	Jul. 30, 2018
Entity Registrant Name	Empire State Realty OP, L.P.
Entity Central Index Key	0001553079
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Entity Filer Category	Large Accelerated Filer
Series ES operating partnership units
Entity Common Stock, Shares Outstanding		31,245,609
Series 60 operating partnership units
Entity Common Stock, Shares Outstanding		8,488,309
Series 250 operating partnership units
Entity Common Stock, Shares Outstanding		4,222,763

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End date of current fiscal year in the format --MM-DD.

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This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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