Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2020
Accounting Policies [Line Items]
Deferred revenue	$ 900,000	$ 900,000	$ 800,000
Advertising and marketing expense		7,900,000	7,400,000	$ 9,700,000
Capitalized interest		$ 0	0	$ 1,400,000
Number of reportable segments | segment		2
383 Main Avenue | Fixed rate mortgage debt
Accounting Policies [Line Items]
Fixed rate debt	30,000,000	$ 30,000,000	$ 30,000,000
Observatory reporting unit
Accounting Policies [Line Items]
Fair value in excess of carrying value (less than) (as a percent)					15.00%
Building and building improvements
Accounting Policies [Line Items]
Impairment charges	$ 7,700,000
Building and building improvements | Minimum
Accounting Policies [Line Items]
Useful life (in years)		39 years
Corporate equipment | Minimum
Accounting Policies [Line Items]
Useful life (in years)		3 years
Corporate equipment | Maximum
Accounting Policies [Line Items]
Useful life (in years)		7 years