Investment in National CineMedia - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended			3 Months Ended		6 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	May 05, 2014 Screenvision LLC	Jun. 30, 2014 NCM	Jun. 30, 2013 NCM	Jun. 30, 2014 NCM	Jun. 30, 2013 NCM
Schedule of Equity Method Investments [Line Items]
Equity in earnings		$ 3,600	$ 1,685	$ 7,220	$ 4,106		$ (75)	$ 536	$ 357	$ 1,402
Number of additional common units of NCM received under common unit adjustment agreement	557,631
Investment in NCM - receipt of common units	8,216			8,216	98,797
Remaining term of exhibitor services agreement	22 years
Total number of common units of NCM owned by Company		24,556,136		24,556,136
Interest on common units of NCM owned by Company		19.00%		19.00%
NCM Agreement to acquire Screenvision						$ 375,000