Screenvision Exhibition, Inc. - Summary of Changes in Investments in Unconsolidated Affiliates and Deferred Revenue (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Balance at January 1, 2015	$ 5,079
Balance at September 30, 2015	6,471
SV Holdco, LLC [Member]
Investments in and Advances to Affiliates, at Fair Value [Roll Forward]
Balance at January 1, 2015	4,195
Equity income of SV Holdco	(1,235)
Balance at September 30, 2015	5,430
Movement in Deferred Revenue [Roll Forward]
Balance at January 1, 2015	31,827
Amortization of Class C units	(158)
Amortization of up-front payment	(710)
Balance at September 30, 2015	$ 30,959