Quarterly report pursuant to Section 13 or 15(d)

Investment in National CineMedia - Additional Information (Detail)

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Investment in National CineMedia - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 0 Months Ended
Mar. 31, 2014
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
NCM
Sep. 30, 2013
NCM
Sep. 30, 2014
NCM
Sep. 30, 2013
NCM
May 05, 2014
NCM
Screenvision LLC
May 05, 2014
NCM
Screenvision LLC
Schedule of Equity Method Investments [Line Items]                      
Equity in earnings   $ 10,328 $ 11,733 $ 17,548 $ 15,839 $ 5,389 $ 7,122 $ 5,746 $ 8,524    
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                    
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
Termination fee                   $ 28,800