Transactions with DCIP (Detail) - Digital Cinema Implementation Partners - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule Of Equity Method Investments [Line Items]
Equipment lease payments	$ 1,121	$ 1,217
Warranty reimbursements from DCIP	(2,938)	(2,501)
Management service fees	$ 158	$ 194