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, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Noncontrolling Interest [Line Items]
Balance	$ (8,684)	$ (4,790)	$ 17,728	$ 32,996	$ (4,790)	$ 32,996
Net income (loss)	(2,804)	(4,947)	(13,001)	(13,403)	(7,751)	(26,404)
Other comprehensive income, net	2,712	453	887	(2,541)
Share-based compensation expense	530	600	456	678
Restricted Stock Units	(182)		(4)	(2)
Balance	(8,428)	(8,684)	6,066	17,728	(8,428)	6,066
Additional Paid-In Capital [Member]
Noncontrolling Interest [Line Items]
Balance	158,351	157,751	156,078	155,402	157,751	155,402
Share-based compensation expense	530	600	456	678
Restricted Stock Units	(185)		(5)	(2)
Balance	158,696	158,351	156,529	156,078	158,696	156,529
Retained Earnings (Accumulated Deficit) [Member]
Noncontrolling Interest [Line Items]
Balance	(119,546)	(114,790)	(92,717)	(79,489)	(114,790)	(79,489)
Net income (loss)	(2,667)	(4,756)	(12,806)	(13,228)
Balance	(122,213)	(119,546)	(105,523)	(92,717)	(122,213)	(105,523)
Treasury Shares [Member]
Noncontrolling Interest [Line Items]
Balance	(40,407)	(40,407)	(40,407)	(40,407)	(40,407)	(40,407)
Balance	(40,407)	(40,407)	(40,407)	(40,407)	(40,407)	(40,407)
Accumulated Other Comprehensive Income/(Loss) [Member]
Noncontrolling Interest [Line Items]
Balance	(6,721)	(7,173)	(5,211)	(2,673)	(7,173)	(2,673)
Other comprehensive income, net	2,704	452	886	(2,538)	3,156
Balance	(4,017)	(6,721)	(4,325)	(5,211)	(4,017)	(4,325)
Reading International Inc. Stockholders' Equity [Member]
Noncontrolling Interest [Line Items]
Balance	(8,068)	(4,364)	17,997	33,087	(4,364)	33,087
Net income (loss)	(2,667)	(4,756)	(12,806)	(13,228)
Other comprehensive income, net	2,704	452	886	(2,538)
Share-based compensation expense	530	600	456	678
Restricted Stock Units	(182)		(4)	(2)
Balance	(7,683)	(8,068)	6,529	17,997	(7,683)	6,529
Noncontrolling Interests [Member]
Noncontrolling Interest [Line Items]
Balance	(616)	(426)	(269)	(91)	(426)	(91)
Net income (loss)	(137)	(191)	(195)	(175)
Other comprehensive income, net	8	1	1	(3)
Balance	$ (745)	$ (616)	(463)	(269)	$ (745)	(463)
Class A [Member]
Noncontrolling Interest [Line Items]
Balance, shares		20,745,594			20,745,594
Balance, shares	21,036,670				21,036,670
Class A [Member] | Common Stock Shares Outstanding [Member]
Noncontrolling Interest [Line Items]
Balance	$ 238	$ 238	$ 237	$ 237	$ 238	$ 237
Balance, shares	20,743,000	20,743,000	20,673,000	20,664,000	20,743,000	20,664,000
Restricted Stock Units	$ 3		$ 1
Restricted Stock Units, shares	291,000		72,000	9,000
Balance	$ 241	$ 238	$ 238	$ 237	$ 241	$ 238
Balance, shares	21,034,000	20,743,000	20,745,000	20,673,000	21,034,000	20,745,000
Class B [Member]
Noncontrolling Interest [Line Items]
Balance, shares		1,680,590			1,680,590
Balance, shares	1,680,590				1,680,590
Class B [Member] | Common Stock Shares Outstanding [Member]
Noncontrolling Interest [Line Items]
Balance	$ 17	$ 17	$ 17	$ 17	$ 17	$ 17
Balance, shares	1,681,000	1,681,000	1,681,000	1,681,000	1,681,000	1,681,000
Balance	$ 17	$ 17	$ 17	$ 17	$ 17	$ 17
Balance, shares	1,681,000	1,681,000	1,681,000	1,681,000	1,681,000	1,681,000