Earnings (Loss) Per Share (Calculation Of Earnings (Loss) Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings (Loss) Per Share [Abstract]
Net income (loss) attributable to Reading International, Inc. common shareholders	$ 3,118us-gaap_NetIncomeLoss	$ (215)us-gaap_NetIncomeLoss
Basic earnings (loss) per share attributable to Reading International, Inc. shareholders	$ 0.13us-gaap_EarningsPerShareBasic	$ (0.01)us-gaap_EarningsPerShareBasic
Diluted earnings (loss) per share attributable to Reading International, Inc. shareholders	$ 0.13us-gaap_EarningsPerShareDiluted	$ (0.01)us-gaap_EarningsPerShareDiluted
Weighted average shares of common stock – basic	23,242,467	23,490,563
Weighted average shares of common stock – dilutive	23,523,655	23,490,563

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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