Earnings Per Share (Computation Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income (loss) attributable to RDI common stockholders	$ 2,394	$ 5,027	$ 313	$ 8,108
Weighted average number of common stock – basic	22,894,083	22,933,589	22,901,764	22,979,436
Weighted average dilutive impact of awards	165,650	213,784	172,909	213,784
Weighted average number of common stock – diluted	23,059,733	23,147,373	23,074,673	23,193,220
Basic earnings (loss) per share attributable to Reading International, Inc. shareholders	$ 0.10	$ 0.22	$ 0.01	$ 0.35
Diluted earnings (loss) per share attributable to Reading International, Inc. shareholders	$ 0.10	$ 0.22	$ 0.01	$ 0.35
Awards excluded from diluted earnings (loss) per share	516,010	126,840	516,010	126,840