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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Mar. 31, 2022
Dec. 31, 2021
Private perpetual preferred units, series 2019    
Capital:    
Private perpetual preferred units, liquidation preference (in USD per share) $ 13.52 $ 13.52
Private perpetual preferred units, issued (in shares) 4,664,038 4,664,000
Private perpetual preferred units, outstanding (in shares) 4,664,000 4,664,000
Private perpetual preferred units, series 2014    
Capital:    
Private perpetual preferred units, liquidation preference (in USD per share) $ 16.62 $ 16.62
Private perpetual preferred units, issued (in shares) 1,560,000 1,560,000
Private perpetual preferred units, outstanding (in shares) 1,560,000 1,560,000
Series PR Operating Partnership Units    
Capital:    
Limited partner operating partnership units, outstanding (in shares) 80,998,000 79,820,000
Series ES operating partnership units    
Capital:    
Limited partner operating partnership units, outstanding (in shares) 22,034,000 22,321,000
Series 60 operating partnership units    
Capital:    
Limited partner operating partnership units, outstanding (in shares) 5,821,000 5,885,000
Series 250 Operating Partnership Units Limited Partners    
Capital:    
Limited partner operating partnership units, outstanding (in shares) 2,937,000 2,971,000
ESRT | Series PR Operating Partnership Units    
Capital:    
General partner operating partnership units, outstanding (in shares) 2,815,000 2,812,000
Limited partner operating partnership units, outstanding (in shares) 166,911,000 167,405,000