Earnings Per Share (Computation Of Basic And Diluted Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income (loss) attributable to Reading International, Inc. common shareholders	$ (5,177)	$ (10,095)	$ (22,967)	$ 31,572
Weighted average number of common stock – basic	22,043,823	21,809,402	22,011,755	21,792,007
Weighted average dilutive impact of awards				670,650
Weighted average number of common stock – diluted	22,043,823	21,809,402	22,011,755	22,462,657
Basic earnings (loss) per share	$ (0.23)	$ (0.46)	$ (1.04)	$ 1.45
Diluted earnings (loss) per share	$ (0.23)	$ (0.46)	$ (1.04)	$ 1.41
Awards excluded from diluted earnings (loss) per share	911,732	492,344	911,732	517,344