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Property And Equipment (Summary Of Investment And Development Property) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |  |
Investment and development property, net | $ 23,002 | $ 26,124 | [1]
Land [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Investment and development property, net | 21,434 | 23,833 |
Construction-In-Progress (Including Capitalized Interest) [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Investment and development property, net | $ 1,568 | $ 2,291 |
[1] | Certain prior period amounts have been reclassified to conform to the current period presentation (see Note 2 - Significant Accounting Policies - Reclassifications).

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- Definition Properties owned by the entity in a status of either being held for development or currently under development for the ultimate purpose to either sell or be operated by the entity. + References No definition available. + Details
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Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=rdi_ConstructionInProgressIncludingCapitalizedInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |