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Investment in NCMI/NCM - Additional Information (Detail) - USD ($) $ in Millions |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 20, 2023 | Feb. 17, 2023 | Sep. 30, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Aug. 03, 2023
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Number of additional common units of NCM receive under common unit adjustment agreement |  |  |  | 4,800,000 |  |  |
Estimated fair value of additional common units received |  |  |  | $ 0.0 |  | $ 1.3 |
NCM |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Recognized incremental screen rental revenue and offsetting interest expense |  |  |  | 17.0 |  | $ 17.5 |
Amortization of screen advertising advances |  |  |  | $ 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 share units in Ncm in exchange | 1,700,000 | 43,700,000 |  |  |  |  |
Number of Ncm to redeem shares |  | 42,000,000 |  |  |  |  |
Company Recorded AnImpairment Charge |  |  |  | $ 0.7 |  |  |
Deferred revenue or NCM screen advertising advances extended term |  |  |  | 2041-02 |  |  |
Investment In NCMI |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Number of common shares held in NCMI |  |  |  |  |  |  | 4,400,000
New issued shares of NCMI | 1,700,000 | 42,000,000 |  |  |  |  |
Unrealized gain |  |  | $ 4.7 | $ 13.9 | [1] |  |
Interest in common units of NCM owned by Company |  |  | 5.00% | 5.00% |  |  |
[1] | See Investment in National CineMedia below.

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