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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Tenant and other receivables allowance	$ 1,128	$ 1,422
Deferred rent receivables allowance	$ 0	$ 185
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)	164,369,210
Limited partner operating partnership units, outstanding (in shares)	138,627,149
Series PR operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	93,222,019	91,759,741
Series ES operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	32,383,207	33,774,678
Series 60 operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	8,695,899	8,987,931
Series 250 operating partnership units
Capital
Limited partner operating partnership units, outstanding (in shares)	4,326,024	4,410,093
ESRT | Series PR operating partnership units
Capital
General partner operating partnership units, outstanding (in shares)	3,029,964	3,004,095
Limited partner operating partnership units, outstanding (in shares)	161,339,246	158,472,949

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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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-Section S99
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-Topic 505
-SubTopic 10
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