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

X

- 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

X

- Details

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

X

- 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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X

- Details

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Namespace Prefix:
Data Type:	na
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: