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Property And Equipment (Summary Of Investment And Development Property) (Details) $ in Thousands | Dec. 31, 2023 USD ($)
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Property, Plant and Equipment [Line Items] |
Investment and development property | $ 8,789
Land [Member] |
Property, Plant and Equipment [Line Items] |
Investment and development property | 3,856
Construction-In-Progress (Including Capitalized Interest) [Member] |
Property, Plant and Equipment [Line Items] |
Investment and development property | $ 4,933

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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
Name: | rdi_PropertyHeldForAndUnderDevelopment
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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