Transactions with DCIP (Detail) - Digital Cinema Implementation Partners - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Schedule of Equity Method Investments [Line Items]
Equipment lease payments	$ 1,452	$ 1,333	$ 4,333	$ 3,864
Warranty reimbursements from DCIP	(2,234)	(1,608)	(6,141)	(4,367)
Management service fees	$ 207	$ 207	$ 619	$ 619