Annual report pursuant to Section 13 and 15(d)

Aggregate Amount of Transaction Price Allocated To Performance Obligation That Are Unsatisfied And Expected To Be Recognized (Detail)

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Aggregate Amount of Transaction Price Allocated To Performance Obligation That Are Unsatisfied And Expected To Be Recognized (Detail)
$ in Thousands
Dec. 31, 2019
USD ($)
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: 2025-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Revenue, remaining performance obligation, expected timing of satisfaction, period
Other Deferred Revenues  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Remaining performance obligations $ 138,426
Other Deferred Revenues | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Remaining performance obligations 125,334
Other Deferred Revenues | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Remaining performance obligations 12,897
Other Deferred Revenues | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Remaining performance obligations $ 195