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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	$ 327,000us-gaap_ProceedsFromMinorityShareholders	$ 263,000us-gaap_ProceedsFromMinorityShareholders	$ 3,350,000us-gaap_ProceedsFromMinorityShareholders
Angelika Center [Member]
Noncontrolling Interests [Line Items]
Decrease in additional paid in capital	101,000us-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				2,250,000us-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		2,500,000us-gaap_ProceedsFromMinorityShareholders / rdi_TitleOfIndividualWithRelationshipToEntityAxis = us-gaap_ChiefExecutiveOfficerMember
Bonus contributed to acquire land		255,000rdi_BonusContributedToAcquireLand / rdi_TitleOfIndividualWithRelationshipToEntityAxis = us-gaap_ChiefExecutiveOfficerMember
Sutton Hill Capital, LLC [Member]
Noncontrolling Interests [Line Items]
Repayment of debt				2,250,000us-gaap_RepaymentsOfDebt / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rdi_SuttonHillCapitalLlcMember
US Sutton Hill Capital Note - Related Party [Member]
Noncontrolling Interests [Line Items]
Repayment of debt				$ 9,000,000us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = rdi_UnitedStatesSuttonHillCapitalNoteRelatedPartyMember

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- Definition

Bonus Contributed To Acquire Land

+ References

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- Definition

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+ References

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- Definition

Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

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+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

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-Paragraph 1

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