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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Tenant and other receivables allowance	$ 3,364	$ 2,792
Deferred rent receivables allowance	$ 231	$ 245
Private perpetual preferred unit 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)	121,746,700
Limited partner operating partnership units, outstanding (in shares)	147,692,115
Series PR operating partnership units
Limited partner operating partnership units, outstanding (in shares)	94,949,441	93,863,451
Series ES operating partnership units
Limited partner operating partnership units, outstanding (in shares)	37,552,404	38,262,650
Series 60 operating partnership units
Limited partner operating partnership units, outstanding (in shares)	10,168,278	10,318,492
Series 250 operating partnership units
Limited partner operating partnership units, outstanding (in shares)	5,021,992	5,106,039
ESRT | Series PR operating partnership units
General partner operating partnership units outstanding (in shares)	2,694,388	2,675,740
Limited partner operating partnership units, outstanding (in shares)	119,052,312	117,347,639

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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=66008989&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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