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Prepaid And Other Assets (Summary Of Prepaid And Other Assets) (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017 | Feb. 05, 2007
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Prepaid And Other Assets [Abstract] |  |  |
Prepaid expenses | $ 1,761,000 | $ 1,625,000 |
Prepaid taxes | 646,000 | 653,000 |
Income taxes receivable | 2,704,000 | 1,686,000 |
Prepaid rent | 930,000 | 1,055,000 |
Deposits | 242,000 | 243,000 |
Restricted cash | 1,342,000 | 17,000 |
Investment in marketable securities | 42,000 | 46,000 |
Total prepaid and other current assets | 7,667,000 | 5,325,000 |
Other non-cinema and non-rental real estate assets | 1,134,000 | 1,134,000 |
Investment in Reading International Trust I | 838,000 | 838,000 | $ 1,500,000
Straight-line rent asset | 4,150,000 | 3,103,000 |
Long-term deposits | 7,000 | 7,000 |
Total non-current assets | $ 6,129,000 | $ 5,082,000 |

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