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Commitments And Contingencies (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Mar. 31, 2015 | Dec. 31, 2014
Commitments And Contingencies [Abstract] |  |
Total debt of unconsolidated joint ventures and entities | $ 569 rdi_TotalDebtOfUnconsolidatedJointVentureAndEntities | $ 592 rdi_TotalDebtOfUnconsolidatedJointVentureAndEntities
Share of unconsolidated debt, based on ownership percentage | $ 190 rdi_ShareOfUnconsolidatedDebtBasedOnOurOwnershipPercentage | $ 197 rdi_ShareOfUnconsolidatedDebtBasedOnOurOwnershipPercentage

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- Definition Share of unconsolidated debt based on our ownership percentage. + References No definition available. + Details
Name: | rdi_ShareOfUnconsolidatedDebtBasedOnOurOwnershipPercentage
Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Total debt of unconsolidated joint venture and entities. + References No definition available. + Details
Name: | rdi_TotalDebtOfUnconsolidatedJointVentureAndEntities
Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration