Transactions with DCIP (Detail) - Digital Cinema Implementation Partners - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule Of Equity Method Investments [Line Items]
Equipment lease payments	$ 1,131	$ 1,243	$ 2,252	$ 2,460
Warranty reimbursements from DCIP	(2,951)	(2,617)	(5,889)	(5,118)
Management service fees	$ 152	$ 184	$ 310	$ 378