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Consolidated Statements of Capital (unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Increase (Decrease) in Partners' Capital [Roll Forward]    
Beginning balance $ 1,822,192 $ 1,781,962
Conversion of operating partnership units to ESRT Partner's Capital $ 0 0
Repurchases of common units (in shares) 0  
Repurchases of common units $ 0 0
Equity compensation 5,162 4,083
Distributions (10,692) (10,783)
Net income 2,995 15,778
Other comprehensive income (loss) 4,481 (5,165)
Ending balance $ 1,824,138 $ 1,785,875
General Partner | Series PR Operating Partnership Units    
Increase (Decrease) in Partners' Capital [Roll Forward]    
Beginning balance (in shares) 170,495,000 167,383,000
Beginning balance $ 1,060,002 $ 1,030,696
Conversion of operating partnership units to ESRT Partner's Capital (in shares) 1,060,000 533,000
Conversion of operating partnership units to ESRT Partner's Capital $ 5,989 $ 1,585
Repurchases of common units (in shares) 0 0
Repurchases of common units $ 0 $ 0
Equity compensation (in shares) 504,000 154,000
Equity compensation $ 146 $ (327)
Distributions (6,022) (5,880)
Net income 1,235 9,220
Other comprehensive income (loss) $ 2,845 $ (3,234)
Ending balance (in shares) 172,059,000 168,070,000
Ending balance $ 1,064,195 $ 1,032,060
Limited Partners | Series PR Operating Partnership Units    
Increase (Decrease) in Partners' Capital [Roll Forward]    
Beginning balance (in shares) 83,927,000 81,605,000
Beginning balance $ 721,183 $ 711,904
Conversion of operating partnership units to ESRT Partner's Capital (in shares) (675,000) (166,000)
Conversion of operating partnership units to ESRT Partner's Capital $ (5,804) $ (1,445)
Equity compensation (in shares) 4,806,000 4,427,000
Equity compensation $ 5,016 $ 4,410
Distributions (2,818) (2,982)
Net income 543 4,139
Other comprehensive income (loss) $ 1,250 $ (1,451)
Ending balance (in shares) 88,058,000 85,866,000
Ending balance $ 719,370 $ 714,575
Limited Partners | Series ES Operating Partnership Units Limited Partners    
Increase (Decrease) in Partners' Capital [Roll Forward]    
Beginning balance (in shares) 16,786,000 18,181,000
Beginning balance $ 8,234 $ 7,126
Conversion of operating partnership units to ESRT Partner's Capital (in shares) (317,000) (312,000)
Conversion of operating partnership units to ESRT Partner's Capital $ (156) $ (122)
Distributions (577) (628)
Net income 121 987
Other comprehensive income (loss) $ 278 $ (346)
Ending balance (in shares) 16,469,000 17,869,000
Ending balance $ 7,900 $ 7,017
Limited Partners | Series 60 Operating Partnership Units Limited Partners    
Increase (Decrease) in Partners' Capital [Roll Forward]    
Beginning balance (in shares) 4,296,000 4,589,000
Beginning balance $ 1,790 $ 1,436
Conversion of operating partnership units to ESRT Partner's Capital (in shares) (58,000) (27,000)
Conversion of operating partnership units to ESRT Partner's Capital $ (24) $ (8)
Distributions (148) (160)
Net income 31 250
Other comprehensive income (loss) $ 72 $ (88)
Ending balance (in shares) 4,238,000 4,562,000
Ending balance $ 1,721 $ 1,430
Limited Partners | Series 250 Operating Partnership Units Limited Partners    
Increase (Decrease) in Partners' Capital [Roll Forward]    
Beginning balance (in shares) 2,216,000 2,393,000
Beginning balance $ 1,043 $ 860
Conversion of operating partnership units to ESRT Partner's Capital (in shares) (10,000) (28,000)
Conversion of operating partnership units to ESRT Partner's Capital $ (5) $ (10)
Distributions (77) (83)
Net income 15 132
Other comprehensive income (loss) $ 36 $ (46)
Ending balance (in shares) 2,206,000 2,365,000
Ending balance $ 1,012 $ 853
Private Perpetual Preferred Units    
Increase (Decrease) in Partners' Capital [Roll Forward]    
Beginning balance (in shares) 6,224,000 6,224,000
Beginning balance $ 29,940 $ 29,940
Distributions (1,050) (1,050)
Net income $ 1,050 $ 1,050
Ending balance (in shares) 6,224,000 6,224,000
Ending balance $ 29,940 $ 29,940
Non-controlling Interest in Other Partnerships    
Increase (Decrease) in Partners' Capital [Roll Forward]    
Beginning balance 0 0
Ending balance $ 0 $ 0