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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Tenant and other receivables allowance	$ 3,504	$ 3,333
Deferred rent receivables allowance	$ 187	$ 390
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)	159,427,448
Limited partner operating partnership units, outstanding (in shares)	140,989,373
Series PR operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	93,203,688	93,075,441
Series ES operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	34,172,111	35,729,094
Series 60 operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	9,137,320	9,701,402
Series 250 operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	4,476,254	4,746,661
ESRT | Series PR operating partnership units
Capital
General partner operating partnership units, outstanding (in shares)	3,004,168	2,990,931
Limited partner operating partnership units, outstanding (in shares)	156,423,280	152,849,546

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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