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Goodwill And Intangible Assets (Summary Of The Goodwill) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015
Goodwill [Line Items] |
Balance as of December 31, 2014 | $ 21,281 us-gaap_Goodwill
Foreign currency translation adjustment | (633)us-gaap_GoodwillTranslationAdjustments
Balance at March 31, 2015 | 20,648 us-gaap_Goodwill
Cinema [Member] |
Goodwill [Line Items] |
Balance as of December 31, 2014 | 16,057 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Foreign currency translation adjustment | (633)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Balance at March 31, 2015 | 15,424 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentCinemaMember
Real Estate [Member] |
Goodwill [Line Items] |
Balance as of December 31, 2014 | 5,224 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentRealEstateMember
Foreign currency translation adjustment |
Balance at March 31, 2015 | $ 5,224 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = rdi_BusinessSegmentRealEstateMember

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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
Name: | us-gaap_Goodwill
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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |