Investment in NCMI/NCM - Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Detail) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022
Schedule Of Equity Method Investments [Line Items]
Impairment of long-lived and other assets		$ 2,000,000	$ 15,200,000	$ 12,100,000		$ 107,500,000
Investment In NCMI
Schedule Of Equity Method Investments [Line Items]
Beginning Balance				9,600,000
Equity in income (loss) of affiliates	[1]			(3,200,000)
Unrealized gain on investment in NCMI		4,700,000		13,900,000	[2]
Impairment of long-lived and other assets				(700,000)
Ending Balance		19,600,000		19,600,000
N C M Screen Advertising Advances
Schedule Of Equity Method Investments [Line Items]
Beginning Balance				(338,200,000)
Interest accrued related to significant financing component	[3]			17,000,000
Amortization of screen advertising advances	[4]			24,300,000
Ending Balance		(330,900,000)		(330,900,000)
Equity in Loss
Schedule Of Equity Method Investments [Line Items]
Beginning Balance	[1]			0
Equity in income (loss) of affiliates	[1]			(3,200,000)
Ending Balance	[1]	(3,200,000)		(3,200,000)
Other Revenue
Schedule Of Equity Method Investments [Line Items]
Beginning Balance	[4]			0
Screen rental revenue earned under ESA	[5]			16,000,000
Amortization of screen advertising advances	[4]			(24,300,000)
Ending Balance	[4]	(8,300,000)		(8,300,000)
Interest Expense - NCM
Schedule Of Equity Method Investments [Line Items]
Beginning Balance	[4]			0
Interest accrued related to significant financing component				17,000,000
Ending Balance		17,000,000		17,000,000
Cash Received
Schedule Of Equity Method Investments [Line Items]
Beginning Balance				0
Screen rental revenue earned under ESA	[5]			10,400,000
Ending Balance	[4]	$ 10,400,000		$ 10,400,000

[1] Equity in loss was recorded through April 11, 2023, the date NCM filed its bankruptcy petition, after which the Company applied the fair value accounting method as discussed below.

[2] See Investment in National CineMedia below.

[3] See Note 8 for the maturity of NCM screen advertising advances as of September 30, 2023.

[4] The Company had a receivable from NCM of $5.6 as of September 30, 2023

[5] Amounts include the per patron and per digital screen theatre access fees, net of amounts due to NCM for on-screen advertising time provided to the Company's beverage concessionaire of approximately $7.1.