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Prepaid And Other Assets (Summary Of Prepaid And Other Assets) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Prepaid And Other Assets [Abstract] |  |
Prepaid expenses | $ 1,913 | $ 1,946
Prepaid rent | 563 | 162
Prepaid taxes | 1,792 | 455
Income taxes receivable | 217 | 5,572
Deposits | 244 | 245
Investment in marketable securities | 25 | 26
Restricted cash | 6,156 | 8
Total prepaid and other current assets | 10,910 | 8,414
Straight-line asset | 4,737 | 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 | 10 | 8
Total other non-current assets | $ 6,719 | $ 8,030

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