Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Detail) - USD ($)		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Impairment of other assets		$ 700,000	$ 0
Investment In NCMI
Schedule Of Equity Method Investments [Line Items]
Beginning Balance		9,600,000
Redemption of common units of NCM for common stock of NCMI		0
Impairment of other assets		(700,000)
Equity in loss	[1]	(3,200,000)
Ending Balance		5,700,000
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	[2]	5,700,000
Amortization of screen advertising advances		8,100,000
Ending Balance		(335,800,000)
Equity in Loss
Schedule Of Equity Method Investments [Line Items]
Beginning Balance	[1]	0
Equity in loss	[1]	3,200,000
Ending Balance	[1]	(3,200,000)
Other Revenues
Schedule Of Equity Method Investments [Line Items]
Beginning Balance	[3]	0
Screen rental revenue earned under ESA	[3],[4]	(4,800,000)
Amortization of screen advertising advances	[3]	(8,100,000)
Ending Balance	[3]	(12,900,000)
Interest Expense - NCM
Schedule Of Equity Method Investments [Line Items]
Beginning Balance		0
Interest accrued related to significant financing component		(5,700,000)
Ending Balance		$ 5,700,000

[1] Equity in loss is recorded one month in arrears.

[2] See Note 8 for the maturity of NCM screen advertising advances as of March 31, 2023.

[3] The Company had a receivable from NCM of $4.8 as of March 31, 2023

[4] 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 $1.8.