Description Of Business And Segment Reporting	9 Months Ended
	Sep. 30, 2021
Description Of Business And Segment Reporting [Abstract]
Description Of Business And Segment Reporting	Note 1 – Description of Business and Segment Reporting Our CompanyReading International, Inc., a Nevada corporation (“RDI” and collectively with our consolidated subsidiaries and corporate predecessors, the “Company,” “Reading,” and “we,” “us,” or “our”) was incorporated in 1999. Our businesses, owned and operated through our various subsidiaries, consist primarily of:the development, ownership, and operation of cinemas in the United States, Australia, and New Zealand; and,the development, ownership, operation and/or rental of retail, commercial and live venue real estate assets in Australia, New Zealand, and the United States. Business SegmentsReported below are the operating segments of our Company for which separate financial information is available and evaluated regularly by the Chief Executive Officer, the chief operating decision-maker of our Company. As part of our real estate activities, we have historically held undeveloped land in urban and suburban centers in the United States, Australia, and New Zealand. However, in the first quarter of 2021, we monetized our undeveloped land in Coachella, California, and Manukau, New Zealand. In the second quarter of 2021, we monetized our retail center Auburn/Redyard, Australia, which included approximately 2.6 acres of undeveloped land. In the second quarter of 2021, we monetized our Royal George theatre in Chicago. In the third quarter of 2021, we also monetized our Invercargill property in New Zealand. The table below summarizes the results of operations for each of our business segments for the quarter and nine months ended September 30, 2021 and 2020, respectively. Operating expense includes costs associated with the day-to-day operations of the cinemas and the management of rental properties, including our live theatre assets. Quarter Ended Nine Months Ended September 30, September 30,(Dollars in thousands) 2021 2020 2021 2020Revenue: Cinema exhibition $ 28,751 $ 7,339 $ 79,580 $ 54,866 Real estate 3,177 3,023 9,948 9,928 Inter-segment elimination (125) (171) (386) (1,953) $ 31,803 $ 10,191 $ 89,142 $ 62,841Segment operating income (loss): Cinema exhibition $ (5,057) $ (13,410) $ (20,680) $ (33,318) Real estate (1,485) (844) (3,907) (1,464) $ (6,542) $ (14,254) $ (24,587) $ (34,782) A reconciliation of segment operating income to income before income taxes is as follows: Quarter Ended Nine Months Ended September 30, September 30,(Dollars in thousands) 2021 2020 2021 2020Segment operating income (loss) $ (6,542) $ (14,254) $ (24,587) $ (34,782)Unallocated corporate expense Depreciation and amortization expense (300) (215) (917) (634) General and administrative expense (4,109) (2,906) (11,957) (11,194) Interest expense, net (3,068) (2,379) (10,437) (6,176)Equity earnings of unconsolidated joint ventures (75) (97) 158 (292)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 $ (11,095) $ (19,842) $ 46,841 $ (53,265)