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Investments in National CineMedia Inc. and Other Affiliates - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Estimated fair value of additional common units received |  |  | $ 0.0 | $ 0.5 |
NCM |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Amounts recognized as accounts receivable |  |  | 1.6 |  | $ 2.1
Recognized incremental screen rental revenue and offsetting interest expense |  |  | 16.0 | 16.5 |
Amortization of screen advertising advances |  |  | 24.4 | 24.3 |
Company's beverage concessionaire advertising costs |  |  | 6.7 | 6.4 |
Investment In NCM | NCM |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Amortization of screen advertising advances |  |  | 16.2 | 16.3 |
Investment In NCMI |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Unrealized gain (loss) | $ 1.5 | $ 11.6 | (9.3) | $ 12.7 |
Amortization of screen advertising advances |  |  | $ 0.0 |  |

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