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Noncontrolling Interests (Components Of Noncontrolling Interests) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Noncontrolling Interest [Line Items]    
Noncontrolling interests in consolidated subsidiaries $ 4,498rdi_NoncontrollingInterestsInConsolidatedSubsidiaries $ 4,612rdi_NoncontrollingInterestsInConsolidatedSubsidiaries
Australia Country Cinemas [Member]    
Noncontrolling Interest [Line Items]    
Noncontrolling interests in consolidated subsidiaries 313rdi_NoncontrollingInterestsInConsolidatedSubsidiaries
/ dei_LegalEntityAxis
= rdi_AustraliaCountryCinemasMember		 410rdi_NoncontrollingInterestsInConsolidatedSubsidiaries
/ dei_LegalEntityAxis
= rdi_AustraliaCountryCinemasMember
Shadow View Land And Farming LLC [Member]    
Noncontrolling Interest [Line Items]    
Noncontrolling interests in consolidated subsidiaries 2,005rdi_NoncontrollingInterestsInConsolidatedSubsidiaries
/ dei_LegalEntityAxis
= rdi_ShadowViewLandAndFarmingLlcMember		 2,000rdi_NoncontrollingInterestsInConsolidatedSubsidiaries
/ dei_LegalEntityAxis
= rdi_ShadowViewLandAndFarmingLlcMember
Sutton Hill Properties [Member]    
Noncontrolling Interest [Line Items]    
Noncontrolling interests in consolidated subsidiaries $ 2,180rdi_NoncontrollingInterestsInConsolidatedSubsidiaries
/ dei_LegalEntityAxis
= rdi_SuttonHillPropertiesMember		 $ 2,202rdi_NoncontrollingInterestsInConsolidatedSubsidiaries
/ dei_LegalEntityAxis
= rdi_SuttonHillPropertiesMember