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Commitments and Contingencies (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended 60 Months Ended 160 Months Ended
Mar. 28, 2024
Mar. 30, 2023
Dec. 28, 2028
Dec. 25, 2025
Dec. 26, 2024
Oct. 31, 2022
Oct. 31, 2021
Oct. 31, 2027
Feb. 13, 2041
Dec. 28, 2023
Other Commitments [Line Items]                    
Operating lease, right-of-use asset $ 11,300,000                  
Short-term lease liability 1.2                  
Long-term lease liability $ 11,900,000                 $ 5,000,000.0
Weighted average remaining lease term 7 years 8 months 12 days                  
Weighted average discount rate 7.40%                  
Maximum potential payment $ 258,300,000                  
Additional amount accrued related to minimum guarantees                   0
Amortization of Intangible Assets 9,500,000 $ 6,200,000 $ 37.8 $ 37.8 $ 28.3          
Amortization expense 5,900,000 $ 6,200,000                
NCM, LLC. | Founding Members                    
Other Commitments [Line Items]                    
Liabilities recorded for related party obligations $ 0                 $ 0
Percentage of increase in payment per theatre patron 8.00%                  
Term of increase in payment percentage per theater patron 5 years                  
Percentage of increase in payment per digital screen and digital cinema equipment 5.00%                  
Minimum | NCM, LLC. | Founding Members                    
Other Commitments [Line Items]                    
Aggregate percentage of theater access fee paid 12.00%                  
Future patron payment | Cinemark and Regal [Member]                    
Other Commitments [Line Items]                    
Amount Increase In Payment Per Theater Patron           $ 0.05 $ 0.0375 $ 0.052 $ 0.08