Earnings Per Share (Computation Of Basic And Diluted Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income (loss) attributable to Reading International, Inc.	$ (11,111)	$ (15,354)
Weighted average number of common stock – basic	22,114,927	21,955,985
Weighted average dilutive impact of awards	783,063	544,673
Weighted average number of common stock – diluted	22,897,990	22,500,658
Basic earnings (loss) per share	$ (0.50)	$ (0.70)
Diluted earnings (loss) per share	$ (0.50)	$ (0.70)
Awards excluded from diluted earnings (loss) per share	783,063	544,673