v3.26.3
Investments in Affiliates - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
NCM          
Schedule Of Equity Method Investments [Line Items]          
Amounts recognized as accounts receivable     $ 4.9   $ 4.2
Recognized incremental screen rental revenue and offsetting interest expense     15.4 $ 16.0  
Amortization of screen advertising advances     24.3 24.4  
Company's beverage concessionaire advertising costs     5.1 6.7  
Investment In NCM | NCM          
Schedule Of Equity Method Investments [Line Items]          
Amortization of screen advertising advances     20.0 16.2  
Investment In NCMI          
Schedule Of Equity Method Investments [Line Items]          
Net loss on investment in NCMI $ 6.8 $ 1.5 7.2 [1] 9.3  
Amortization of screen advertising advances [1]     0.0    
Cash Distributions Received     $ 1.3 $ 1.6  
[1] Our Investment in NCMI is accounted for under the fair value of accounting method. As of September 30, 2026, our Investment in NCMI is included in “Prepaid expenses and other” on the condensed consolidated balance sheet.