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Aggregate Amount of Transaction Price Allocated To Performance Obligation That Are Unsatisfied And Expected To Be Recognized (Detail 1) $ in Thousands	Mar. 31, 2019 USD ($)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations	$ 393,747
Deferred Revenue \| NCM
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations	284,944
Other Deferred Revenues
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Remaining performance obligations	$ 108,803