Annual report pursuant to Section 13 and 15(d)

Investment in National CineMedia Limited Liability Company - Additional Information (Detail)

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Investment in National CineMedia Limited Liability Company - Additional Information (Detail) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]      
Theatre access fees per patron $ 0.07    
Increase in percentage of payment per theatre patron 8.00%    
Duration of percentage increase in theatre access fees per patron 5 years    
Payment per digital screen 1,021 972 926
Percentage of annual increase in payment per digital screen 5.00%    
Minimum percentage of aggregate advertising revenue for payment of fees 12.00%    
Remaining term of exhibitor services agreement 24 years    
Number of additional common units of NCM received under common unit adjustment agreement 598,724 549,417 1,757,548
Change of interest gain     271,000
Investment in NCM - receipt of common units 9,137,000 9,302,000 30,683,000
Receipt of common units due to annual common unit adjustment   9,302  
Total number of common units of NCM owned by Company 18,094,644    
Interest on common units of NCM owned by Company 16.00%    
Deferred Revenue
      
Schedule of Equity Method Investments [Line Items]      
Investment in NCM - receipt of common units 9,137,000 9,302,000 30,683,000
Investment In Ncm
      
Schedule of Equity Method Investments [Line Items]      
Investment in NCM - receipt of common units (9,137,000) (9,302,000) (30,683,000)
Common unit convertible into share of NCMI common stock, conversion ratio 1    
Estimated fair value of investment in NCM $ 255,677    
Estimated fair value of investment using NCMI's stock price $ 14.13