Real Estate Property Sale Price

No definition available.

Name:	rdi_RealEstatePropertySalePrice
Namespace Prefix:	rdi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of interest capitalized during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

+ Details

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

- Definition

The total depreciation charge recorded for property subject to or held for lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

+ Details

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

- Definition

The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

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

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=rdi_BurwoodMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Property And Equipment (Narrative) (Details) $ in Millions							3 Months Ended
Property And Equipment (Narrative) (Details) $ in Millions	Dec. 14, 2017 AUD ($)	Dec. 14, 2017 USD ($)	Jun. 19, 2017 AUD ($)	Jun. 19, 2017 USD ($)	May 23, 2014 AUD ($)	May 23, 2014 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 AUD ($)	Dec. 31, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Depreciation expense for operating property							$ 4,700,000	$ 3,500,000
Capitalized interest charges							$ 335,000
Disposal Group, Not Discontinued Operations [Member] \| Burwood [Member]
Property, Plant and Equipment [Line Items]
Proceeds from the sale property	$ 36.6	$ 28,100,000	$ 21.8	$ 16,600,000	$ 6.5	$ 5,900,000
Sale price									$ 64.9	$ 50,600,000