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Prepaid And Other Assets (Summary Of Prepaid And Other Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Prepaid And Other Assets [Abstract] |  |
Prepaid expenses | $ 1,945 | $ 1,946
Prepaid rent | 88 | 162
Prepaid taxes | 816 | 455
Income taxes receivable | 2,016 | 5,572
Deposits | 245 | 245
Investment in marketable securities | 25 | 26
Restricted cash | 7 | 8
Total prepaid and other current assets | 5,142 | 8,414
Straight-line asset | 5,920 | 6,050
Other non-cinema and non-rental real estate assets | 1,134 | 1,134
Investment in Reading International Trust I | 838 | 838
Long-term deposits | 12 | 8
Total other non-current assets | $ 7,904 | $ 8,030

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