Non-controlling Interests (Summary Of Changes In Controlling And Non-controlling Stockholders’ Equity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Balance	$ (40,407)
Balance	63,279	$ 105,060
Net income (loss)	(11,324)	(15,453)
Other comprehensive income, net	(1,294)	3,525
Share-based compensation expense	443	415
Restricted Stock Units	(132)	(31)
Distributions to noncontrolling stockholders		(22)
Balance	50,972	93,494
Balance	(40,407)
Additional Paid-In Capital [Member]
Balance	153,784	151,981
Share-based compensation expense	443	415
Restricted Stock Units	(132)	(32)
Balance	154,095	152,364
Retained Earnings (Accumulated Deficit) [Member]
Balance	(48,816)	(12,632)
Net income (loss)	(11,111)	(15,354)
Balance	(59,927)	(27,986)
Treasury Shares [Member]
Balance	(40,407)	(40,407)
Balance	(40,407)	(40,407)
Accumulated Other Comprehensive Income (Loss) [Member]
Balance	(1,957)	4,882
Other comprehensive income, net	(1,293)	3,524
Balance	(3,250)	8,406
Reading International Inc. Stockholders' Equity [Member]
Balance	62,856	104,074
Net income (loss)	(11,111)	(15,354)
Other comprehensive income, net	(1,293)	3,524
Share-based compensation expense	443	415
Restricted Stock Units	(132)	(31)
Balance	50,763	92,628
Noncontrolling Interests [Member]
Balance	423	986
Net income (loss)	(213)	(99)
Other comprehensive income, net	(1)	1
Distributions to noncontrolling stockholders		(22)
Balance	$ 209	866
Class A [Member]
Balance, shares	20,412,185
Balance, shares	20,501,150
Class A [Member] | Common Stock Shares Outstanding [Member]
Balance	$ 235	$ 233
Balance, shares	20,410	20,260
Restricted Stock Units		$ 1
Restricted Stock Units, shares	89	52
Balance	$ 235	$ 234
Balance, shares	20,499	20,312
Class B [Member]
Balance, shares	1,680,590
Balance, shares	1,680,590
Class B [Member] | Common Stock Shares Outstanding [Member]
Balance	$ 17	$ 17
Balance, shares	1,680	1,680
Balance	$ 17	$ 17
Balance, shares	1,680	1,680