Prepaid And Other Assets (Summary Of Prepaid And Other Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Prepaid And Other Assets [Abstract]
Prepaid expenses	$ 2,887	$ 1,761
Prepaid rent	895	930
Prepaid taxes	632	646
Income taxes receivable	6,148	2,704
Deposits	218	242
Investment in marketable securities	44	42
Restricted cash	7	1,342
Total prepaid and other current assets	10,831	7,667
Straight-line rent	4,184	4,150
Other non-cinema and non-rental real estate assets	1,134	1,134
Investment in Reading International Trust I	838	838
Long-term deposits	8	7
Total other non-current assets	$ 6,164	$ 6,129