Investment in National CineMedia Inc. - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		9 Months Ended
	Apr. 15, 2024	Apr. 01, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024		Sep. 30, 2023
Schedule Of Equity Method Investments [Line Items]
Number of additional common units of NCM receive under common unit adjustment agreement		100,000
Estimated fair value of additional common units received		$ 0.5			$ 0.5		$ 0.0
NCM
Schedule Of Equity Method Investments [Line Items]
Recognized incremental screen rental revenue and offsetting interest expense					16.5		17.0
Amortization of screen advertising advances					$ 24.3		24.3
NCM | Minimum
Schedule Of Equity Method Investments [Line Items]
Percentage of incremental borrowing rates					4.40%
NCM | Maximum
Schedule Of Equity Method Investments [Line Items]
Percentage of incremental borrowing rates					8.30%
Investment In NCM
Schedule Of Equity Method Investments [Line Items]
Common unit redemption	$ 4.95
Deferred revenue or NCM screen advertising advances extended term					2041-02
Investment In NCMI
Schedule Of Equity Method Investments [Line Items]
Common unit redemption price	$ 0.6
Reduction in investment in NCM					$ 0.5
Net gain on investment in NCMI					$ 0.1
Number of common units of NCM owned by Company			4,400,000		4,400,000
Unrealized gain			$ 11.6	$ 4.7	$ 12.7	[1]	$ 13.9
Interest in common units of NCM owned by Company			4.50%		4.50%
Amortization of screen advertising advances					$ 0.0

[1] See Investment in National CineMedia below.