Earnings (Loss) Per Share (Tables)	12 Months Ended
Dec. 31, 2021
Earnings (Loss) Per Share [Abstract]
Computation Of Basic And Diluted Earnings (Loss) Per Share	(Dollars in thousands, except share and per share data) 2021 2020 2019Numerator: Net income (loss) attributable to Reading International, Inc. $ 31,921 $ (65,200) $ (26,429)Denominator: Weighted average shares of common stock – basic 21,801,719 21,749,155 22,631,754Weighted average dilutive impact of stock-based awards 605,097 466,356 152,368Weighted average shares of common stock – diluted 22,406,816 22,215,511 22,784,122Basic earnings (loss) per share $ 1.46 $ (3.00) $ (1.17)Diluted earnings (loss) per share $ 1.42 $ (3.00) $ (1.17)Awards excluded from diluted earnings (loss) per share 517,344 674,676 516,010

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

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