Non-controlling Interests (Summary Of Changes In Controlling And Non-controlling Stockholders’ Equity) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Balance		$ (40,407)			$ (40,407)
Balance	$ 50,972	63,279	$ 93,494	$ 105,060	63,279	$ 105,060
Net income (loss)	(2,861)	(11,324)	(2,443)	(15,453)	(14,185)	(17,895)
Other comprehensive income, net	(741)	(1,294)	(9,217)	3,525
Share-based compensation expense	308	443	466	415
Restricted Stock Units	(112)	(132)	(52)	(31)
Distributions to noncontrolling stockholders			(21)	(22)
Balance	47,566	50,972	82,227	93,494	47,566	82,227
Balance	(40,407)				(40,407)
Additional Paid-In Capital [Member]
Balance	154,095	153,784	152,364	151,981	153,784	151,981
Share-based compensation expense	308	443	466	415
Restricted Stock Units	(113)	(132)	(52)	(32)
Balance	154,290	154,095	152,778	152,364	154,290	152,778
Retained Earnings (Accumulated Deficit) [Member]
Balance	(59,927)	(48,816)	(27,986)	(12,632)	(48,816)	(12,632)
Net income (loss)	(2,778)	(11,111)	(2,436)	(15,354)
Balance	(62,705)	(59,927)	(30,422)	(27,986)	(62,705)	(30,422)
Treasury Shares [Member]
Balance	$ (40,407)	(40,407)	$ (40,407)	(40,407)	$ (40,407)	$ (40,407)
Balance, shares	(40,407,000)		(40,407,000)		(40,407,000)	(40,407,000)
Balance		(40,407)		(40,407)
Accumulated Other Comprehensive Income (Loss) [Member]
Balance	$ (3,250)	(1,957)	$ 8,406	4,882	$ (1,957)	$ 4,882
Other comprehensive income, net	(740)	(1,293)	(9,218)	3,524	(2,033)
Balance	(3,990)	(3,250)	(812)	8,406	(3,990)	(812)
Reading International Inc. Stockholders' Equity [Member]
Balance	50,763	62,856	92,628	104,074	62,856	104,074
Net income (loss)	(2,778)	(11,111)	(2,436)	(15,354)
Other comprehensive income, net	(740)	(1,293)	(9,218)	3,524
Share-based compensation expense	308	443	466	415
Restricted Stock Units	(112)	(132)	(52)	(31)
Balance	47,441	50,763	81,388	92,628	47,441	81,388
Noncontrolling Interests [Member]
Balance	209	423	866	986	423	986
Net income (loss)	(83)	(213)	(7)	(99)
Other comprehensive income, net	(1)	(1)	1	1
Distributions to noncontrolling stockholders			(21)	(22)
Balance	$ 125	$ 209	839	866	$ 125	839
Class A [Member]
Balance, shares		20,412,185			20,412,185
Balance, shares	20,592,834				20,592,834
Class A [Member] | Common Stock Shares Outstanding [Member]
Balance	$ 235	$ 235	$ 234	$ 233	$ 235	$ 233
Balance, shares	20,499	20,410	20,312	20,260	20,410	20,260
Restricted Stock Units	$ 1			$ 1
Restricted Stock Units, shares	92	89	49	52
Balance	$ 236	$ 235	$ 234	$ 234	$ 236	$ 234
Balance, shares	20,591	20,499	20,361	20,312	20,591	20,361
Class B [Member]
Balance, shares		1,680,590			1,680,590
Balance, shares	1,680,590				1,680,590
Class B [Member] | Common Stock Shares Outstanding [Member]
Balance	$ 17	$ 17	$ 17	$ 17	$ 17	$ 17
Balance, shares	1,680	1,680	1,680	1,680	1,680	1,680
Balance	$ 17	$ 17	$ 17	$ 17	$ 17	$ 17
Balance, shares	1,680	1,680	1,680	1,680	1,680	1,680