Summary of Activity with NCM Included in Company's Condensed Consolidated Financial Statements (Parenthetical) (Detail) $ in Thousands	9 Months Ended
Sep. 30, 2015 USD ($)
Schedule of Equity Method Investments [Line Items]
Company's beverage concessionaire advertising costs	$ 7,338

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration