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Noncontrolling Interests (Components Of Noncontrolling Interests) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Noncontrolling Interest [Line Items] |  |
Noncontrolling interests in consolidated subsidiaries | $ 4,431 | $ 4,331
Australia Country Cinemas, Pty Ltd [Member] |  |
Noncontrolling Interest [Line Items] |  |
Noncontrolling interests in consolidated subsidiaries | 275 | 318
Shadow View Land And Farming, LLC [Member] |  |
Noncontrolling Interest [Line Items] |  |
Noncontrolling interests in consolidated subsidiaries | 2,010 | 1,940
Sutton Hill Capital, LLC [Member] |  |
Noncontrolling Interest [Line Items] |  |
Noncontrolling interests in consolidated subsidiaries | $ 2,146 | $ 2,073

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- Definition Noncontrolling interests in consolidated subsidiaries. + References No definition available. + Details
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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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- Details
Name: | dei_LegalEntityAxis=rdi_AustraliaCountryCinemasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=rdi_ShadowViewLandAndFarmingLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=rdi_SuttonHillPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |