Deferred Costs, Acquired Lease Intangibles and Goodwill - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2013
Deferred Costs [Line Items]
Amortization of deferred leasing and acquired deferred leasing costs	$ 23,600	$ 25,400	$ 28,600
Rental revenue related to the amortization of below-market leases, net of above-market leases	2,415	4,759	5,896
Goodwill	491,479	491,479
Empire State Building observatory operations
Deferred Costs [Line Items]
Goodwill				$ 227,500
Empire State Building
Deferred Costs [Line Items]
Goodwill				250,800
501 Seventh Avenue
Deferred Costs [Line Items]
Goodwill				$ 13,200
Future Amortization Expense
Deferred Costs [Line Items]
Amortization expense related to acquired lease intangibles	$ 7,400	11,800	$ 10,500
Future Ground Rent Amortization
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	22 years 2 months 12 days
In-place leases and deferred leasing costs
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	3 years 4 months 24 days
Above-market leases
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	3 years 6 months
Below-market Lease
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	2 years 10 months 24 days
Revolving credit facility | Unsecured revolving credit facility
Deferred Costs [Line Items]
Net deferred financing costs	$ 2,900	$ 5,000