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Noncontrolling Interests (Components Of Income Attributable To Noncontrolling Interest) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Noncontrolling Interest [Line Items] |  |  |
Net income attributable to noncontrolling interest | $ (57)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | $ 104 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | $ (492)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Angelika Center [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net income attributable to noncontrolling interest |  | 173 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_AngelikaCenterMember | 612 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_AngelikaCenterMember
Australia Country Cinemas [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net income attributable to noncontrolling interest | 143 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_AustraliaCountryCinemasMember | 129 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_AustraliaCountryCinemasMember | 86 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_AustraliaCountryCinemasMember
Shadow View Land And Farming LLC [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net income attributable to noncontrolling interest | (64)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_ShadowViewLandAndFarmingLlcMember | (50)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_ShadowViewLandAndFarmingLlcMember | (843)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_ShadowViewLandAndFarmingLlcMember
Sutton Hill Properties [Member] |  |  |
Noncontrolling Interest [Line Items] |  |  |
Net income attributable to noncontrolling interest | $ (136)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_SuttonHillPropertiesMember | $ (148)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_SuttonHillPropertiesMember | $ (347)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = rdi_SuttonHillPropertiesMember

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- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591551-111686 + Details
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