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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Tenant and other receivables allowance	$ 3,333	$ 2,792
Deferred rent receivables allowance	$ 390	$ 245
Private perpetual preferred units, liquidation preference per share (in dollars 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)	155,800,000
Limited partner operating partnership units, outstanding (in shares)	143,300,000
Series PR Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding (in shares)	93,075,441	93,863,451
Series ES Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding (in shares)	35,729,094	38,262,650
Series 60 Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding (in shares)	9,701,402	10,318,492
Series 250 Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding (in shares)	4,746,661	5,106,039
ESRT [Member] | Series PR Operating Partnership Units [Member]
General partner operating partnership units, outstanding (in shares)	2,990,931	2,675,740
Limited partner operating partnership units, outstanding (in shares)	152,849,546	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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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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-Name Accounting Standards Codification
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