Earnings Per Share (Computation Of Basic And Diluted Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income (loss) attributable to Reading International, Inc.	$ (2,778)	$ (2,436)	$ (13,889)	$ (17,790)
Weighted average number of common stock – basic	22,262,214	22,040,512	22,183,618	21,995,186
Weighted average dilutive impact of awards	1,240,292	912,448	1,240,292	912,448
Weighted average number of common stock – diluted	23,502,506	22,952,960	23,423,910	22,907,634
Basic earnings (loss) per share	$ (0.12)	$ (0.11)	$ (0.63)	$ (0.81)
Diluted earnings (loss) per share	$ (0.12)	$ (0.11)	$ (0.63)	$ (0.81)
Awards excluded from diluted earnings (loss) per share	205,122	912,448	205,122	912,448