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Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Level 1    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investment in NCMI [1] $ 14.9  
Level 2    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investment in NCMI [1] 0.0  
Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investment in NCMI [1] 0.0  
Fair Value Measurements, Recurring    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Investment in NCMI [1] 14.9  
Interest rate swap assets [2] 19.2 $ 20.4
Fair Value Measurements, Recurring | Level 1    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Interest rate swap assets [2] 0.0 0.0
Fair Value Measurements, Recurring | Level 2    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Interest rate swap assets [2] 19.2 20.4
Fair Value Measurements, Recurring | Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Interest rate swap assets [2] $ 0.0 $ 0.0
[1] See further discussion of investment in NCMI at Note 8.
[2] See further discussion of interest rate swaps at Note 7.