Annual report pursuant to Section 13 and 15(d)

Summary of Recognition of Revenue Related To Deferred Revenue (Detail)

v3.20.4
Summary of Recognition of Revenue Related To Deferred Revenue (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period  
NCM Screen Advertising Advances    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue remaining performance obligation, amount [1] $ 344,255  
NCM Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period [1] 1 year  
Revenue remaining performance obligation, amount [1] $ 8,268  
NCM Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period [1] 1 year  
Revenue remaining performance obligation, amount [1] $ 8,840  
NCM Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period [1] 1 year  
Revenue remaining performance obligation, amount [1] $ 9,452  
NCM Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period [1] 1 year  
Revenue remaining performance obligation, amount [1] $ 10,108  
NCM Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue remaining performance obligation, amount [1] 10,811  
NCM Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-01-01    
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period [1]  
Revenue remaining performance obligation, amount [1] $ 296,776  
[1] Amounts are net of the estimated interest to be accrued for the periods presented.