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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Tenant and other receivables allowance	$ 2,792	$ 1,427
Deferred rent receivables allowance	$ 245	$ 420
Private perpetual preferred units, liquidation preference per share (in dollars per share)	$ 16.62	$ 16.62
Private perpetual preferred units, issued, shares	1,560,360	1,560,360
Private perpetual preferred units, outstanding, shares	1,560,360	1,560,360
General partner operating partnership units, outstanding	120,000,000
Limited partner operating partnership units, outstanding	147,600,000
Series PR Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding	93,863,451	100,210,874
Series ES Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding	38,262,650	42,365,408
Series 60 Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding	10,318,492	11,456,448
Series 250 Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding	5,106,039	5,789,717
ESRT [Member] | Series PR Operating Partnership Units [Member]
General partner operating partnership units, outstanding	2,675,740	2,671,043
Limited partner operating partnership units, outstanding	117,347,639	104,520,844

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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
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