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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
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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 |  |

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