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Condensed Consolidated Statements of Capital - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Increase (Decrease) in Partners' Capital [Roll Forward]        
Beginning balance $ 1,789,248 $ 1,751,216 $ 1,781,962 $ 1,731,045
Conversion of operating partnership units to ESRT Partner's Capital $ 0 0 0 0
Repurchases of common units (in shares) 0      
Repurchases of common units $ 0 0 (2,148) 0
Acquisition of non-controlling interests in other partnerships       (15,297)
Equity compensation 6,474 5,752 17,455 15,589
Distributions (10,802) (10,645) (32,391) (31,844)
Net income 13,645 22,796 40,808 61,566
Other comprehensive loss (345) (11,798) (7,466) (3,738)
Ending balance $ 1,798,220 $ 1,757,321 $ 1,798,220 $ 1,757,321
General Partner | Series PR Operating Partnership Units        
Increase (Decrease) in Partners' Capital [Roll Forward]        
Beginning balance (in shares) 169,276,000 165,465,000 167,383,000 163,046,000
Beginning balance $ 1,038,209 $ 1,011,279 $ 1,030,696 $ 985,518
Conversion of operating partnership units to ESRT Partner's Capital (in shares) 649,000 1,037,000 2,721,000 3,300,000
Conversion of operating partnership units to ESRT Partner's Capital $ 2,977 $ 2,944 $ 12,963 $ 12,042
Repurchases of common units (in shares)     (310,000) 0
Repurchases of common units     $ (2,148) $ 0
Acquisition of non-controlling interests in other partnerships       $ 114
Equity compensation (in shares) 17,000 (14,000) 148,000 142,000
Equity compensation $ 522 $ 495 $ 729 $ 776
Distributions (5,946) (5,824) (17,745) (17,376)
Net income 7,985 13,541 23,724 36,273
Other comprehensive loss $ (232) $ (7,319) $ (4,704) $ (2,231)
Ending balance (in shares) 169,942,000 166,488,000 169,942,000 166,488,000
Ending balance $ 1,043,515 $ 1,015,116 $ 1,043,515 $ 1,015,116
Limited Partners | Series PR Operating Partnership Units        
Increase (Decrease) in Partners' Capital [Roll Forward]        
Beginning balance (in shares) 85,067,000 82,238,000 81,605,000 80,189,000
Beginning balance $ 712,079 $ 701,933 $ 711,904 $ 694,512
Conversion of operating partnership units to ESRT Partner's Capital (in shares) (342,000) (315,000) (1,492,000) (1,342,000)
Conversion of operating partnership units to ESRT Partner's Capital $ (2,861) $ (2,706) $ (12,498) $ (11,536)
Equity compensation (in shares) 15,000 (11,000) 4,627,000 3,065,000
Equity compensation $ 5,952 $ 5,257 $ 16,726 $ 14,813
Distributions (2,965) (2,868) (8,932) (8,539)
Net income 3,477 6,046 10,469 16,238
Other comprehensive loss $ (88) $ (3,280) $ (2,075) $ (1,106)
Ending balance (in shares) 84,740,000 81,912,000 84,740,000 81,912,000
Ending balance $ 715,594 $ 704,382 $ 715,594 $ 704,382
Limited Partners | Series ES Operating Partnership Units Limited Partners        
Increase (Decrease) in Partners' Capital [Roll Forward]        
Beginning balance (in shares) 17,483,000 19,048,000 18,181,000 19,947,000
Beginning balance $ 6,812 $ 6,116 $ 7,126 $ 4,427
Conversion of operating partnership units to ESRT Partner's Capital (in shares) (244,000) (509,000) (942,000) (1,408,000)
Conversion of operating partnership units to ESRT Partner's Capital $ (95) $ (177) $ (369) $ (387)
Distributions (605) (650) (1,847) (1,999)
Net income 806 1,529 2,485 4,206
Other comprehensive loss $ (16) $ (857) $ (493) $ (286)
Ending balance (in shares) 17,239,000 18,539,000 17,239,000 18,539,000
Ending balance $ 6,902 $ 5,961 $ 6,902 $ 5,961
Limited Partners | Series 60 Operating Partnership Units Limited Partners        
Increase (Decrease) in Partners' Capital [Roll Forward]        
Beginning balance (in shares) 4,460,000 4,889,000 4,589,000 5,144,000
Beginning balance $ 1,383 $ 1,236 $ 1,436 $ 779
Conversion of operating partnership units to ESRT Partner's Capital (in shares) (27,000) (137,000) (156,000) (392,000)
Conversion of operating partnership units to ESRT Partner's Capital $ (8) $ (38) $ (49) $ (80)
Distributions (156) (167) (473) (514)
Net income 214 413 640 1,110
Other comprehensive loss $ (6) $ (224) $ (127) $ (75)
Ending balance (in shares) 4,433,000 4,752,000 4,433,000 4,752,000
Ending balance $ 1,427 $ 1,220 $ 1,427 $ 1,220
Limited Partners | Series 250 Operating Partnership Units Limited Partners        
Increase (Decrease) in Partners' Capital [Roll Forward]        
Beginning balance (in shares) 2,298,000 2,537,000 2,393,000 2,619,000
Beginning balance $ 825 $ 712 $ 860 $ 462
Conversion of operating partnership units to ESRT Partner's Capital (in shares) (36,000) (76,000) (131,000) (158,000)
Conversion of operating partnership units to ESRT Partner's Capital $ (13) $ (23) $ (47) $ (39)
Distributions (80) (86) (243) (265)
Net income 113 217 339 584
Other comprehensive loss $ (3) $ (118) $ (67) $ (40)
Ending balance (in shares) 2,262,000 2,461,000 2,262,000 2,461,000
Ending balance $ 842 $ 702 $ 842 $ 702
Private Perpetual Preferred Units        
Increase (Decrease) in Partners' Capital [Roll Forward]        
Beginning balance (in shares) 6,224,000 6,224,000 6,224,000 6,224,000
Beginning balance $ 29,940 $ 29,940 $ 29,940 $ 29,940
Distributions (1,050) (1,050) (3,151) (3,151)
Net income $ 1,050 $ 1,050 $ 3,151 $ 3,151
Ending balance (in shares) 6,224,000 6,224,000 6,224,000 6,224,000
Ending balance $ 29,940 $ 29,940 $ 29,940 $ 29,940
Non-controlling Interest in Other Partnerships        
Increase (Decrease) in Partners' Capital [Roll Forward]        
Beginning balance 0 0 0 15,407
Acquisition of non-controlling interests in other partnerships       (15,411)
Net income   0 0 4
Other comprehensive loss   0 0 0
Ending balance $ 0 $ 0 $ 0 $ 0