Summary Financial Information for DCIP (Detail) - Digital Cinema Implementation Partners - Other Affiliates - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Revenues	$ 48,274	$ 43,129	$ 133,675	$ 123,731
Operating income	31,180	26,178	82,369	72,945
Net income	$ 26,949	$ 20,189	$ 67,728	$ 54,153