Deferred Costs, Acquired Lease Intangibles and Goodwill - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2020	Dec. 31, 2013
Deferred Costs [Line Items]
Amortization of deferred leasing and acquired deferred leasing costs	$ 28,600	$ 24,800	$ 24,500
Rental revenue related to the amortization of below-market leases, net of above-market leases	5,896	3,627	7,311
Goodwill	491,479	491,479
Observatory reporting unit
Deferred Costs [Line Items]
Fair value in excess of carrying value (less than) (as a percent)				15.00%
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	$ 10,500	7,600	$ 10,900
Future Ground Rent Amortization
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	23 years 1 month 6 days
In-place leases and deferred leasing costs
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	3 years 7 months 6 days
Above-market leases
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	3 years 9 months 18 days
Below-market Lease
Deferred Costs [Line Items]
Weighted-average amortization period (in years)	3 years
Unsecured revolving credit facility | Revolving credit facility
Deferred Costs [Line Items]
Net deferred financing costs	$ 7,200	$ 2,100