Transactions with DCIP (Detail) - Digital Cinema Implementation Partners - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule Of Equity Method Investments [Line Items]
Equipment lease payments	$ 1,217	$ 1,369
Warranty reimbursements from DCIP	(2,501)	(1,884)
Management service fees	$ 194	$ 206