Restatement of Previously Issued Consolidated Financial Statements (Schedule Of Effects Of Restatement On The Consolidated Statement Of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Costs and expenses
Total costs and expenses	$ (54,501)		$ (63,266)		$ (107,083)	$ (116,955)
Operating income (loss)	(7,692)		1,789		(15,222)	(6,094)
Interest expense, net	(5,377)		(4,874)		(10,662)	(8,991)
Income (loss) before income tax expense and equity earnings of unconsolidated joint ventures	(13,276)		(3,171)		(26,877)	(14,994)
Income (loss) before income taxes	(13,157)		(2,964)		(26,783)	(14,768)
Net income (loss)	(13,001)	$ (13,403)	(2,861)	$ (11,324)	(26,404)	(14,185)
Net income (loss) attributable to Reading International, Inc.	$ (12,806)		$ (2,778)		$ (26,034)	$ (13,889)
Basic earnings (loss) per share	$ (0.57)		$ (0.12)		$ (1.16)	$ (0.63)
Diluted earnings (loss) per share	$ (0.57)		$ (0.12)		$ (1.16)	$ (0.63)
Cinema [Member]
Costs and expenses
Costs and expenses	$ (42,758)		$ (51,364)		$ (83,478)	$ (93,019)
Previously Reported [Member]
Costs and expenses
Total costs and expenses	(51,161)				(103,743)
Operating income (loss)	(4,352)				(11,882)
Interest expense, net	(5,252)				(10,537)
Income (loss) before income tax expense and equity earnings of unconsolidated joint ventures	(9,811)				(23,412)
Income (loss) before income taxes	(9,692)				(23,318)
Net income (loss)	(9,536)				(22,939)
Net income (loss) attributable to Reading International, Inc.	$ (9,341)				$ (22,569)
Basic earnings (loss) per share	$ (0.42)				$ (1.01)
Diluted earnings (loss) per share	$ (0.42)				$ (1.01)
Previously Reported [Member] | Cinema [Member]
Costs and expenses
Costs and expenses	$ (39,418)				$ (80,138)
Revision of Prior Period, Adjustment [Member]
Costs and expenses
Total costs and expenses	(3,340)				(3,340)
Operating income (loss)	(3,340)				(3,340)
Interest expense, net	(125)				(125)
Income (loss) before income tax expense and equity earnings of unconsolidated joint ventures	(3,465)				(3,465)
Income (loss) before income taxes	(3,465)				(3,465)
Net income (loss)	(3,465)				(3,465)
Net income (loss) attributable to Reading International, Inc.	$ (3,465)				$ (3,465)
Basic earnings (loss) per share	$ (0.15)				$ (0.15)
Diluted earnings (loss) per share	$ (0.15)				$ (0.15)
Revision of Prior Period, Adjustment [Member] | Cinema [Member]
Costs and expenses
Costs and expenses	$ (3,340)				$ (3,340)