Screenvision Transaction - Summary of Changes in Investments in Unconsolidated Affiliates and Deferred Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Investments in unconsolidated affiliates
Beginning balance	$ 5,079
Ending balance	8,033	$ 5,079
SV Holdco, LLC [Member]
Investments in unconsolidated affiliates
Beginning balance	4,196	6,188
Equity loss of SV Holdco	(2,761)	1,992
Ending balance	6,957	4,196
Deferred revenue
Beginning balance	31,827	32,984
Amortization of up-front payment	(946)	(946)
Amortization of Class C units	(211)	(211)
Ending balance	$ 30,670	$ 31,827