Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Total revenues	$ 31,803	$ 10,191	$ 89,142	$ 62,841
Costs and expenses
Depreciation and amortization	(5,560)	(5,612)	(17,011)	(16,149)
General and administrative	(5,274)	(4,228)	(19,205)	(15,275)
Total costs and expenses	(42,754)	(27,566)	(126,603)	(109,451)
Operating income (loss)	(10,951)	(17,375)	(37,461)	(46,610)
Interest expense, net	(3,068)	(2,379)	(10,437)	(6,176)
Gain (loss) on sale of assets	2,559	(1)	92,345	(1)
Other income (expense)	440	10	2,236	(186)
Income (loss) before income tax expense and equity earnings of unconsolidated joint ventures	(11,020)	(19,745)	46,683	(52,973)
Equity earnings of unconsolidated joint ventures	(75)	(97)	158	(292)
Income (loss) before income taxes	(11,095)	(19,842)	46,841	(53,265)
Income tax benefit (expense)	895	490	(12,380)	5,070
Net income (loss)	(10,200)	(19,352)	34,461	(48,195)
Less: net income (loss) attributable to noncontrolling interests	(105)	(124)	2,889	(389)
Net income (loss) attributable to Reading International, Inc.	$ (10,095)	$ (19,228)	$ 31,572	$ (47,806)
Basic earnings (loss) per share	$ (0.46)	$ (0.88)	$ 1.45	$ (2.20)
Diluted earnings (loss) per share	$ (0.46)	$ (0.88)	$ 1.41	$ (2.20)
Weighted average number of shares outstanding-basic	21,809,402	21,748,531	21,792,007	21,749,146
Weighted average number of shares outstanding-diluted	21,809,402	21,748,531	22,462,657	21,749,146
Cinema [Member]
Revenues
Total revenues	$ 28,751	$ 7,339	$ 79,580	$ 54,866
Costs and expenses
Costs and expenses	(29,237)	(15,817)	(82,485)	(71,769)
Real Estate [Member]
Revenues
Total revenues	3,052	2,852	9,562	7,975
Costs and expenses
Costs and expenses	$ (2,683)	$ (1,909)	$ (7,902)	$ (6,258)