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Noncontrolling Interests (Narrative) (Details) | Sep. 30, 2016
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Australia Country Cinemas, Pty Ltd [Member] |
Ownership percentage by noncontrolling interest | 25.00%
Shadow View Land And Farming, LLC [Member] |
Ownership percentage by noncontrolling interest | 50.00%
Sutton Hill Capital, LLC [Member] |
Ownership percentage by noncontrolling interest | 25.00%

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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | dei_LegalEntityAxis=rdi_AustraliaCountryCinemasMember
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Data Type: | na
Balance 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: |