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Investment in National CineMedia (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011
Investment in National CineMedia (Textual) [Abstract] |  |
Investment in NCM - receipt of common units | $ 9,137 | $ 9,302
Investment in National CineMedia (Additional Textual) [Abstract] |  |
Equity earnings from NCM | 3,574 | 4,486
Number of additional common units of NCM received under Common Unit Adjustment Agreement | 598,724 |
Total number of common units of NCM owned by Company | 18,094,644 |
Interest on common units of NCM owned by Company | 16.00% |
Company's beverage concessionaire | 8,367 |
Remaining term of Exhibitor Services Agreement | 24 years |
Deferred Revenue [Member] |  |
Investment in National CineMedia (Textual) [Abstract] |  |
Investment in NCM - receipt of common units | $ (9,137) |

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