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Pension And Other Liabilities (Schedule Of Reconciliation Of The Lease Make-Good Provision) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Pension And Other Liabilities [Abstract] |  |
Opening balance | $ 4,385 |
Liabilities incurred during the year | 1,314 | $ 4,385
Liabilities settled during the year | (381) |
Accretion expense | 212 |
Effect of changes in foreign currency | (302) |
Ending balance | $ 5,228 | $ 4,385

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- Definition Lease Make-good Provision + References No definition available. + Details
Name: | rdi_LeaseMakeGoodProvision
Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lease Make-Good Provision, Accretion Expense + References No definition available. + Details
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Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Lease Make-Good Provision, Effects Of Changes In Foreign Currency + References No definition available. + Details
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Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Lease Make-Good Provision, Liabilities Incurred + References No definition available. + Details
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Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Lease Make-Good Provision, Liabilities Settled + References No definition available. + Details
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Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration