Earnings (Loss) Per Share (Computation Of Basic And Diluted Earnings (Loss) Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings (Loss) Per Share [Abstract]
Net income (loss) attributable to Reading International, Inc.	$ (30,673)	$ (36,184)	$ 31,921
Weighted average shares of common stock – basic	22,222,635	22,020,921	21,801,719
Weighted average dilutive impact of stock-based awards	1,124,673	935,324	605,097
Weighted average shares of common stock – diluted	23,347,308	22,956,245	22,406,816
Basic earnings (loss) per share	$ (1.38)	$ (1.64)	$ 1.46
Diluted earnings (loss) per share	$ (1.38)	$ (1.64)	$ 1.42
Awards excluded from diluted earnings (loss) per share	205,122	327,498	517,344