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Investment in Digital Cinema Implementation Partners (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2012 ProjectionSystem | Mar. 31, 2011 | Dec. 31, 2011
Summary of activity with DCIP |  |  |
Beginning balance | $ 12,798,000 |  |
Equity in income of affiliates | 1,790,000 | 2,438,000 |
Ending balance | 14,206,000 |  |
Investment in Digital Cinema Implementation Partners (Textual) [Abstract] |  |  |
Voting interest in Digital Cinema Implementation Partners | 33.00% |  |
Economic interest in Digital Cinema Implementation Partners | 24.30% |  |
Equity in income of affiliates | 1,790,000 | 2,438,000 |
Equipment lease expense |  | 912,000 |
Depreciation expense on domestic 35 millimeter projectors |  | 3,541,000 |
Digital Cinema Implementation Partners [Member] |  |  |
Summary of activity with DCIP |  |  |
Beginning balance | 12,798,000 |  |
Cash distribution to DCIP | 309,000 |  |
Equity in income of affiliates | 1,099,000 | 1,686,000 |
Ending balance | 14,206,000 |  | 12,798,000
Investment in Digital Cinema Implementation Partners (Textual) [Abstract] |  |  |
Equity in income of affiliates | 1,099,000 | 1,686,000 |
Digital projection systems leased under operating lease, initial term |  |  | 12 years
Number of one-year fair value renewal options |  |  | 10 years
Minimum annual rent per digital projection system |  |  | 1,000
Minimum annual rent per digital projection system through the end of the lease term |  |  | 3,000
Number of equipments being leased under master equipment lease agreement | 3,461 |  |
Equipment lease expense | $ 1,929,000 |  |

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