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Noncontrolling Interests (Narrative) (Details)
Mar. 31, 2015
Australia Country Cinemas [Member]  
Noncontrolling Interests [Line Items]  
Ownership percentage by noncontrolling interest 25.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= rdi_AustraliaCountryCinemasMember
Shadow View Land And Farming LLC [Member]  
Noncontrolling Interests [Line Items]  
Ownership percentage by noncontrolling interest 50.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= rdi_ShadowViewLandAndFarmingLlcMember
Sutton Hill Properties [Member]  
Noncontrolling Interests [Line Items]  
Ownership percentage by noncontrolling interest 25.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= rdi_SuttonHillPropertiesMember