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Future Minimum Rental Income (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Future Minimum Rental Income [Abstract] |  |  |
Real estate revenue | $ 16,887 rdi_RevenueFromRealEstate | $ 18,803 rdi_RevenueFromRealEstate | $ 19,727 rdi_RevenueFromRealEstate

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- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue, sublease revenue and leasing activities associated with live theater operations. + References No definition available. + Details
Name: | rdi_RevenueFromRealEstate
Namespace Prefix: | rdi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_LeasesOperatingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration