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Goodwill And Intangible Assets (Summary Of The Goodwill) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Line Items] |  |
Beginning balance | $ 22,159 us-gaap_Goodwill | $ 22,898 us-gaap_Goodwill
Foreign currency translation adjustment | (878)us-gaap_GoodwillTranslationAdjustments | (739)us-gaap_GoodwillTranslationAdjustments
Ending balance | 21,281 us-gaap_Goodwill | 22,159 us-gaap_Goodwill
Cinema [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 16,935 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember | 17,674 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Foreign currency translation adjustment | (878)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember | (739)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Ending balance | 16,057 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember | 16,935 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Real Estate [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 5,224 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_RealEstateSegmentMember | 5,224 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_RealEstateSegmentMember
Foreign currency translation adjustment |  |
Ending balance | $ 5,224 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_RealEstateSegmentMember | $ 5,224 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_RealEstateSegmentMember

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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Balance Type: | debit
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- Details
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Namespace Prefix: |
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- Details
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Period Type: |