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Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity Method Investments And Joint Ventures [Abstract]
Company's beverage concessionaire advertising costs	$ 11,965	$ 11,110	$ 10,523

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- Definition

Cost of on-screen advertising time provided to beverage concessionaire.

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No definition available.

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No definition available.

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