Deferred Costs, Acquired Lease Intangibles and Goodwill - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2013
Deferred Costs [Line Items]
Amortization of deferred leasing and acquired deferred leasing costs	$ 25,400	$ 28,600	$ 24,800
Rental revenue related to the amortization of below-market leases, net of above-market leases	4,759	5,896	3,627
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	$ 11,800	10,500	$ 7,600
Future Ground Rent Amortization
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	22 years 7 months 6 days
In-place leases and deferred leasing costs
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	3 years 6 months
Above-market leases
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	3 years 8 months 12 days
Below-market Lease
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	3 years 1 month 6 days
Revolving credit facility | Unsecured revolving credit facility
Deferred Costs [Line Items]
Net deferred financing costs	$ 5,000	$ 7,200