Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Summary of Recognition of Revenue Related To Deferred Revenue (Detail)
$ in Thousands
Sep. 30, 2021
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-10-01  
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: 2022-10-01  
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: 2023-10-01  
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: 2024-10-01  
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: 2025-10-01  
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: 2026-10-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
N C M Screen Advertising Advances  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Revenue remaining performance obligation, amount $ 348,212 [1]
N C M Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-10-01  
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, amount $ 8,968 [1]
N C M Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-10-01  
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, amount $ 9,587 [1]
N C M Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-10-01  
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, amount $ 10,251 [1]
N C M Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-10-01  
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, amount $ 10,962 [1]
N C M Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-10-01  
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, amount $ 11,724 [1]
N C M Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-10-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue remaining performance obligation, amount $ 296,720 [1]
[1] Amounts are net of the estimated interest to be accrued for the periods presented. See discussion of significant financing component below.