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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Tenant and other receivables allowance | $ 1,082 | $ 499
Deferred rent receivables allowance | $ 262 | $ 216
ESRT General Partner Operating Partnership Units Outstanding | 95,607,990 |
Limited partner operating partnership units, outstanding | 150,356,053 |
Series PR Operating Partnership Units [Member] |  |
Limited partner operating partnership units, outstanding | 85,073,470 | 84,588,270
Series ES Operating Partnership Units [Member] |  |
Limited partner operating partnership units, outstanding | 46,134,135 | 46,134,135
Series 60 Operating Partnership Units [Member] |  |
Limited partner operating partnership units, outstanding | 12,570,434 | 12,570,434
Series 250 Operating Partnership Units [Member] |  |
Limited partner operating partnership units, outstanding | 6,578,014 | 6,578,014
ESRT [Member] | Series PR Operating Partnership Units [Member] |  |
ESRT General Partner Operating Partnership Units Outstanding | 2,459,640 | 2,454,770
Limited partner operating partnership units, outstanding | 93,148,350 | 93,151,383

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