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Capital - Schedule of ESRT Restricted Stock and LTIP Unit Activity (Details)
 12 Months Ended
Dec. 31, 2024
$ / shares
shares
Weighted Average Grant Fair Value  
Unvested, beginning balance (in dollars per share) | $ / shares $ 6.60
Vested (in dollars per share) | $ / shares 7.37
Granted (in dollars per share) | $ / shares 7.81
Forfeited or unearned (in dollars per share) | $ / shares 7.29
Unvested, ending balance (in dollars per share) | $ / shares $ 6.87
ESRT Restricted Stock  
Restricted Stock and LTIP Units  
Unvested, beginning balance (in shares) 598,289
Vested (in shares) (209,221)
Granted (in shares) 259,927
Forfeited or unearned (in shares) (36,579)
Unvested, ending balance (in shares) 612,416
Time-based LTIPs  
Restricted Stock and LTIP Units  
Unvested, beginning balance (in shares) 3,297,550
Vested (in shares) (1,167,148)
Granted (in shares) 1,485,369
Forfeited or unearned (in shares) 0
Unvested, ending balance (in shares) 3,615,771
Market-based LTIPs  
Restricted Stock and LTIP Units  
Unvested, beginning balance (in shares) 2,738,812
Vested (in shares) (885,162)
Granted (in shares) 1,010,132
Forfeited or unearned (in shares) (234,780)
Unvested, ending balance (in shares) 2,629,002
Performance-based LTIPs  
Restricted Stock and LTIP Units  
Unvested, beginning balance (in shares) 1,276,363
Vested (in shares) (2,208)
Granted (in shares) 808,874
Forfeited or unearned (in shares) (4,930)
Unvested, ending balance (in shares) 2,078,099