Quarterly report pursuant to Section 13 or 15(d)

National CineMedia - Additional Information (Detail)

v3.20.2
National CineMedia - Additional Information (Detail)
9 Months Ended
Sep. 30, 2020
USD ($)
$ / shares
shares
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Schedule Of Equity Method Investments [Line Items]      
Number of additional common units of NCM received under common unit adjustment agreement | shares 1,112,368    
Value of common units received from NCM $ 3,620,000 $ 1,552,000  
Number of common units of NCM owned by Company | shares 40,850,068    
Interest in common units of NCM owned by Company 25.00%    
Investment In NCM      
Schedule Of Equity Method Investments [Line Items]      
Common unit convertible into share of NCMI common stock, conversion ratio 1    
Estimated fair value of investment using NCM's stock price $ 111,112,000    
NCMI common stock price | $ / shares $ 2.72    
Investment in NCM $ 250,434,000   $ 265,792,000
NCM      
Schedule Of Equity Method Investments [Line Items]      
Proceeds from ESA Modification $ 174,000,000    
Deferred revenue amortization year and month 2041-02    
Investment in NCM $ 250,434,000   $ 265,792,000
Impairment of investment $ 0    
Deferred revenue or NCM screen advertising advances extended term 2041-02    
Recognized incremental screen rental revenue and offsetting interest expense   $ 17,726,000  
Amortization of screen advertising advances $ 23,463,000    
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%