Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Summary of Recognition of Revenue Related To Deferred Revenue (Detail)
$ in Thousands
Mar. 31, 2021
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-04-01  
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: 2022-04-01  
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: 2023-04-01  
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: 2024-04-01  
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: 2025-04-01  
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: 2026-04-01  
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 $ 342,240 [1]
N C M 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 year
Revenue remaining performance obligation, amount $ 8,407 [1]
N C M 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 year
Revenue remaining performance obligation, amount $ 8,989 [1]
N C M 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 year
Revenue remaining performance obligation, amount $ 9,612 [1]
N C M 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, Expected Timing of Satisfaction, Period 1 year
Revenue remaining performance obligation, amount $ 10,279 [1]
N C M 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 year
Revenue remaining performance obligation, amount $ 10,994 [1]
N C M Screen Advertising Advances | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2027-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Revenue remaining performance obligation, amount $ 293,959 [1]
[1] Amounts are net of the estimated interest to be accrued for the periods presented.  See discussion of significant financing component below.