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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares | Mar. 31, 2024 | Dec. 31, 2023
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Private perpetual preferred units, series 2019 |  |
Capital: |  |
Private perpetual preferred units, liquidation preference (in USD per share) | $ 13.52 | $ 13.52
Private perpetual preferred units, issued (in shares) | 4,664,038 | 4,664,000
Private perpetual preferred units, outstanding (in shares) | 4,664,000 | 4,664,000
Private perpetual preferred units, series 2014 |  |
Capital: |  |
Private perpetual preferred units, liquidation preference (in USD per share) | $ 16.62 | $ 16.62
Private perpetual preferred units, issued (in shares) | 1,560,000 | 1,560,000
Private perpetual preferred units, outstanding (in shares) | 1,560,000 | 1,560,000
Series PR Operating Partnership Units |  |
Capital: |  |
Limited partner operating partnership units, outstanding (in shares) | 82,266,000 | 80,189,000
Series ES Operating Partnership Units Limited Partners |  |
Capital: |  |
Limited partner operating partnership units, outstanding (in shares) | 19,387,000 | 19,947,000
Series 60 Operating Partnership Units Limited Partners |  |
Capital: |  |
Limited partner operating partnership units, outstanding (in shares) | 4,991,000 | 5,144,000
Series 250 Operating Partnership Units Limited Partners |  |
Capital: |  |
Limited partner operating partnership units, outstanding (in shares) | 2,573,000 | 2,619,000
ESRT | Series PR Operating Partnership Units |  |
Capital: |  |
General partner operating partnership units, outstanding (in shares) | 2,740,000 | 2,709,000
Limited partner operating partnership units, outstanding (in shares) | 162,058,000 | 160,337,000

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