Prepaid And Other Assets (Summary Of Prepaid And Other Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Prepaid And Other Assets [Abstract]
Prepaid expenses	$ 1,611	$ 1,625
Prepaid rent	973	1,055
Prepaid taxes	650	653
Income taxes receivable	1,857	1,686
Deposits	243	243
Investment in marketable securities	43	46
Restricted cash	16	17
Total prepaid and other current assets	5,393	5,325
Straight-line rent	3,995	3,103
Other non-cinema and non-rental real estate assets	1,134	1,134
Investment in Reading International Trust I	838	838
Long-term deposits	7	7
Long-term restricted cash	1,556
Total other non-current assets	$ 7,530	$ 5,082