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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Tenant and other receivables allowance	$ 1,422	$ 3,333
Deferred rent receivables allowance	$ 185	$ 390
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)	161,500,000
Limited partner operating partnership units, outstanding (in shares)	138,900,000
Series PR Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding (in shares)	91,759,741	93,075,441
Series ES Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding (in shares)	33,774,678	35,729,094
Series 60 Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding (in shares)	8,987,931	9,701,402
Series 250 Operating Partnership Units [Member]
Limited partner operating partnership units, outstanding (in shares)	4,410,093	4,746,661
ESRT [Member] | Series PR Operating Partnership Units [Member]
General partner operating partnership units, outstanding (in shares)	3,004,095	2,990,931
Limited partner operating partnership units, outstanding (in shares)	158,472,949	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
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-Name Accounting Standards Codification
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