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Investments In And Advances To Unconsolidated Joint Ventures And Entities (Summary Of The Investments In And Advances To Unconsolidated Joint Ventures And Entities) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Schedule of Equity Method Investments [Line Items] |  |
Total investments | $ 6,169 us-gaap_EquityMethodInvestments | $ 6,735 us-gaap_EquityMethodInvestments
Rialto Distribution [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Interest | 33.30%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember |
Rialto Cinemas [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Interest | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoCinemasMember |
Total investments | 1,564 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoCinemasMember | 1,571 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoCinemasMember
205-209 East 57th Street Associates, LLC [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Interest | 25.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_TwoZeroFiveTwoZeroNineEastFiftySeventhStreetAssociatesLlcMember |
Mt. Gravatt [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Interest | 33.30%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_MtGravattCinemaMember |
Total investments | $ 4,605 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_MtGravattCinemaMember | $ 5,164 us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_MtGravattCinemaMember

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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