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Capital - Schedule of ESRT Restricted Stock and LTIP Unit Activity (Details)
 12 Months Ended
Dec. 31, 2023
$ / shares
shares
Weighted Average Grant Fair Value  
Unvested, beginning balance (in dollars per share) | $ / shares $ 6.69
Vested (in dollars per share) | $ / shares 7.17
Granted (in dollars per share) | $ / shares 5.67
Forfeited or unearned (in dollars per share) | $ / shares 4.30
Unvested, ending balance (in dollars per share) | $ / shares $ 6.60
ESRT Restricted Stock  
Restricted Stock and LTIP Units  
Unvested, beginning balance (in shares) 359,293
Vested (in shares) (121,128)
Granted (in shares) 370,465
Forfeited or unearned (in shares) (10,341)
Unvested, ending balance (in shares) 598,289
Time-based LTIPs  
Restricted Stock and LTIP Units  
Unvested, beginning balance (in shares) 2,713,522
Vested (in shares) (1,148,987)
Granted (in shares) 1,733,015
Forfeited or unearned (in shares) 0
Unvested, ending balance (in shares) 3,297,550
Market-based LTIPs  
Restricted Stock and LTIP Units  
Unvested, beginning balance (in shares) 4,070,537
Vested (in shares) (582,800)
Granted (in shares) 946,398
Forfeited or unearned (in shares) (1,695,323)
Unvested, ending balance (in shares) 2,738,812
Performance-based LTIPs  
Restricted Stock and LTIP Units  
Unvested, beginning balance (in shares) 510,989
Vested (in shares) (2,011)
Granted (in shares) 771,180
Forfeited or unearned (in shares) (3,795)
Unvested, ending balance (in shares) 1,276,363