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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2021	Dec. 31, 2020
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	4,664,038
Private perpetual preferred units, outstanding (in shares)	4,664,038	4,664,038
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)	1,560,360	1,560,360
Private perpetual preferred units, outstanding (in shares)	1,560,360	1,560,360
Series PR Operating Partnership Units
Capital
Limited partner operating partnership units, outstanding (in shares)	80,656,332	80,355,297
Series ES operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	23,270,194	23,677,975
Series 60 operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	6,253,569	6,424,567
Series 250 operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	3,110,231	3,255,480
ESRT | Series PR Operating Partnership Units
Capital
General partner operating partnership units, outstanding (in shares)	2,856,222	2,852,787
Limited partner operating partnership units, outstanding (in shares)	169,475,649	168,712,617

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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