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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Tenant and other receivables allowance | $ 3,994 | $ 3,333
Deferred rent receivables allowance | $ 264 | $ 390
Private perpetual preferred unit 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) | 157,784,591 |
Limited partner operating partnership units, outstanding (in shares) | 142,583,324 |
Series PR operating partnership units |  |
Limited partner operating partnership units, outstanding (in shares) | 93,469,127 | 93,075,441
Series ES operating partnership units |  |
Limited partner operating partnership units, outstanding (in shares) | 35,061,538 | 35,729,094
Series 60 operating partnership units |  |
Limited partner operating partnership units, outstanding (in shares) | 9,456,808 | 9,701,402
Series 250 operating partnership units |  |
Limited partner operating partnership units, outstanding (in shares) | 4,595,861 | 4,746,661
ESRT | Series PR operating partnership units |  |
General partner operating partnership units outstanding (in shares) | 3,003,679 | 2,990,931
Limited partner operating partnership units, outstanding (in shares) | 154,780,912 | 152,849,546

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