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Noncontrolling Interests (Narrative) (Details) (USD $) | 12 Months Ended | 0 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 18, 2013
Noncontrolling Interests [Line Items] |  |  |  |
Contributions from noncontrolling stockholders | $ 327,000 us-gaap_ProceedsFromMinorityShareholders | $ 263,000 us-gaap_ProceedsFromMinorityShareholders | $ 3,350,000 us-gaap_ProceedsFromMinorityShareholders |
Angelika Center [Member] |  |  |  |
Noncontrolling Interests [Line Items] |  |  |  |
Decrease in additional paid in capital | 101,000 us-gaap_StockholdersEquityPeriodIncreaseDecrease / dei_LegalEntityAxis = rdi_AngelikaCenterMember |  |  |
Australia Country Cinemas [Member] |  |  |  |
Noncontrolling Interests [Line Items] |  |  |  |
Noncontrolling interests | 25.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = rdi_AustraliaCountryCinemasMember |  |  |
Shadow View Land And Farming LLC [Member] |  |  |  |
Noncontrolling Interests [Line Items] |  |  |  |
Noncontrolling interests | 50.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = rdi_ShadowViewLandAndFarmingLlcMember |  |  |
Sutton Hill Properties [Member] |  |  |  |
Noncontrolling Interests [Line Items] |  |  |  |
Noncontrolling interests | 25.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = rdi_SuttonHillPropertiesMember |  |  | 25.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = rdi_SuttonHillPropertiesMember
Contributions from noncontrolling stockholders |  |  |  | 2,250,000 us-gaap_ProceedsFromMinorityShareholders / dei_LegalEntityAxis = rdi_SuttonHillPropertiesMember
Chief Executive Officer [Member] |  |  |  |
Noncontrolling Interests [Line Items] |  |  |  |
Noncontrolling interests |  | 50.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / rdi_TitleOfIndividualWithRelationshipToEntityAxis = us-gaap_ChiefExecutiveOfficerMember |  |
Contributions from noncontrolling stockholders |  | 2,500,000 us-gaap_ProceedsFromMinorityShareholders / rdi_TitleOfIndividualWithRelationshipToEntityAxis = us-gaap_ChiefExecutiveOfficerMember |  |
Bonus contributed to acquire land |  | 255,000 rdi_BonusContributedToAcquireLand / rdi_TitleOfIndividualWithRelationshipToEntityAxis = us-gaap_ChiefExecutiveOfficerMember |  |
Sutton Hill Capital, LLC [Member] |  |  |  |
Noncontrolling Interests [Line Items] |  |  |  |
Repayment of debt |  |  |  | 2,250,000 us-gaap_RepaymentsOfDebt / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdi_SuttonHillCapitalLlcMember
US Sutton Hill Capital Note - Related Party [Member] |  |  |  |
Noncontrolling Interests [Line Items] |  |  |  |
Repayment of debt |  |  |  | $ 9,000,000 us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = rdi_UnitedStatesSuttonHillCapitalNoteRelatedPartyMember

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