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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Tenant and other receivables allowance		$ 488
Deferred rent receivables allowance		$ 19
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
General partner operating partnership units, outstanding (in shares)	178,020,905
Limited partner operating partnership units, outstanding (in shares)	126,870,876
Series PR operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	86,748,971	86,202,638
Series ES operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	28,518,492	30,129,556
Series 60 operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	7,686,098	8,019,509
Series 250 operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	3,917,315	4,063,737
ESRT | Series PR operating partnership units
Capital
General partner operating partnership units, outstanding (in shares)	3,048,918	3,033,261
Limited partner operating partnership units, outstanding (in shares)	174,971,987	171,877,365

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