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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2015
Feb. 22, 2016
Jun. 30, 2015
Entity Registrant Name Empire State Realty OP, L.P.    
Entity Central Index Key 0001553079    
Document Type 10-K    
Current Fiscal Year End Date --12-31    
Amendment Flag false    
Document Period End Date Dec. 31, 2015    
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Entity Filer Category Large Accelerated Filer    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 0
Series ES Operating Partnership Units [Member]      
Entity Common Stock, Shares Outstanding   37,849,162  
Series 60 Operating Partnership Units [Member]      
Entity Common Stock, Shares Outstanding   10,247,311  
Series 250 Operating Partnership Units [Member]      
Entity Common Stock, Shares Outstanding   5,082,733