Screenvision Exhibition, Inc. - Summary of Changes in Investments in Unconsolidated Affiliates and Deferred Revenue (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Balance at January 1, 2016	$ 8,033
Balance at September 30, 2016	9,417
SV Holdco, LLC [Member]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Balance at January 1, 2016	6,957
Equity income of SV Holdco	1,537
Balance at September 30, 2016	8,494
Movement in Deferred Revenue [Roll Forward]
Balance at January 1, 2016	30,670
Theatre acquisition bonus	2,047
Amortization of up-front payment	(710)
Amortization of Class C units	(185)
Balance at September 30, 2016	$ 31,822