Investments in Unconsolidated Affiliates - Combined Financial Information of Unconsolidated Affiliated Companies (Detail) - Screenvision Exhibition, Inc., and Interests in Other Joint Ventures [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Assets:
Current assets	$ 49,907		$ 49,907
Noncurrent assets	123,019		123,019
Total assets	172,926		172,926
Liabilities:
Current liabilities	37,442		37,442
Noncurrent liabilities	61,913		61,913
Total liabilities	99,355		99,355
Results of operations:
Revenue	39,912	$ 36,243	63,525	$ 67,718
Operating income (loss)	1,709	(5,609)	(6,629)	(13,429)
Income (loss) from continuing operations	83	(3,592)	6,393	(8,675)
Net income (loss)	$ 83	$ (3,592)	$ 6,393	$ (8,675)