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Capital - Additional Information and Private Perpetual Preferred Units (Details) - $ / shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
May 16, 2019
Shares and Units [Abstract]        
OP units outstanding (in shares) 285,622,197      
Dividends on common stock received until performance criteria met for LTIP units (as a percent) 10.00%      
Dividends on common stock received after performance criteria met for LTIP units (as a percent) 90.00%      
Dividends on common stock received in periods after performance criteria met for LTIP units (as a percent) 100.00%      
Dividends declared (in USD per share) $ 0 $ 0.105    
2019 Plan        
Shares and Units [Abstract]        
Number of shares authorized under the plan (in shares) 11,000,000.0     11,000,000.0
Empire State Realty Trust        
Shares and Units [Abstract]        
OP units owned by the Company (in shares) 172,331,871      
Other Partners, Certain Directors, Officers And Other Members Of Executive Management        
Shares and Units [Abstract]        
OP units not owned by the Company (in shares) 113,290,326      
Empire State Realty OP | Empire State Realty Trust        
Shares and Units [Abstract]        
OP units owned by the Company (as a percent) 60.30%      
Empire State Realty OP | Other Partners, Certain Directors, Officers And Other Members Of Executive Management        
Shares and Units [Abstract]        
OP units not owned by the Company (as a percent) 39.70%      
Private Perpetual Preferred Units, Series 2019        
Shares and Units [Abstract]        
Private perpetual preferred units, issued (in shares) 4,664,038   4,664,038  
Private perpetual preferred units, liquidation preference (in USD per share) $ 13.52   $ 13.52  
Preferred units cumulative cash distributions (in USD per share) $ 0.70      
Private Perpetual Preferred Units, Series 2014        
Shares and Units [Abstract]        
Private perpetual preferred units, issued (in shares) 1,560,360   1,560,360  
Private perpetual preferred units issued during period (in shares) 1,560,360      
Private perpetual preferred units, liquidation preference (in USD per share) $ 16.62   $ 16.62  
Dividends declared (in USD per share) $ 0.60