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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income (loss) attributable to Reading International, Inc. common shareholders	$ (2,436)	$ 22,702	$ (17,790)	$ 41,667
Weighted average number of common stock – basic	22,040,512	21,808,556	21,995,186	21,784,700
Weighted average dilutive impact of awards	912,448	671,612	912,448	672,219
Weighted average number of common stock – diluted	22,952,960	22,480,168	22,907,634	22,456,919
Basic earnings (loss) per share	$ (0.11)	$ 1.04	$ (0.81)	$ 1.91
Diluted earnings (loss) per share	$ (0.11)	$ 1.01	$ (0.81)	$ 1.86
Awards excluded from diluted earnings (loss) per share	912,448	492,344	912,448	492,344