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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
Schedule of Equity Method Investments [Line Items]
Total investments	$ 6,169us-gaap_EquityMethodInvestments	$ 6,735us-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	1,564us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoCinemasMember	1,571us-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	$ 4,605us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_MtGravattCinemaMember	$ 5,164us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_MtGravattCinemaMember

X

- 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)

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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