Derivative, Fixed Interest Rate, Contract Rate

No definition available.

Name:	rdi_DerivativeFixedInterestRateContractRate
Namespace Prefix:	rdi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Derivative, Fixed Interest Rate, Interest Margin

+ References

No definition available.

+ Details

Name:	rdi_DerivativeFixedInterestRateInterestMargin
Namespace Prefix:	rdi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Reduction In Margin Cost

+ References

No definition available.

+ Details

Name:	rdi_LineOfCreditFacilityReductionInMarginCost
Namespace Prefix:	rdi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=rdi_AustralianCorporateCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rdi_NewZealandCorporateCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rdi_NewZealandCorporateCreditFacilitySecondExtensionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rdi_TrustPreferredSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rdi_UnitedStatesBankOfAmericaRevolverMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rdi_UnitedStatesUnionSquareTermLoanSunLifeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Notes Payable (Narrative) (Details)	3 Months Ended	12 Months Ended	1 Months Ended
Notes Payable (Narrative) (Details)	Mar. 31, 2015	Dec. 31, 2014	Apr. 30, 2015
NAB Australian Corporate Credit Facility [Member]
Debt Instrument [Line Items]
Fixed interest rate	7.85%
Swap contract rate	5.50%
Interest rate margin	2.35%
Interest rate	4.61%
US Bank Of America Revolver [Member]
Debt Instrument [Line Items]
Fixed interest rate	3.65%
Swap contract rate	1.15%
Interest rate margin	2.50%
Interest rate	2.68%
Trust Preferred Securities [Member]
Debt Instrument [Line Items]
Fixed interest rate	5.20%
Swap contract rate	1.20%
Interest rate margin	4.00%
Interest rate	4.25%	4.23%
Maturity date	Apr. 30, 2027
New Zealand Corporate Credit Facility [Member]
Debt Instrument [Line Items]
Interest rate	5.70%	5.80%
Maturity date	Apr. 30, 2015
Reduction in margin cost	0.25%
New Zealand Corporate Credit Facility, Second Extension [Member]
Debt Instrument [Line Items]
Maturity date	Jul. 30, 2015
US Union Square Theatre Term Loan [Member]
Debt Instrument [Line Items]
Interest rate	5.92%	5.92%
Maturity date	May 01, 2015
Subsequent Event [Member] \| New Zealand Corporate Credit Facility [Member]
Debt Instrument [Line Items]
Maturity date			Jul. 30, 2015
Subsequent Event [Member] \| New Zealand Corporate Credit Facility, Second Extension [Member]
Debt Instrument [Line Items]
Maturity date	Jul. 30, 2015
Subsequent Event [Member] \| US Union Square Theatre Term Loan [Member]
Debt Instrument [Line Items]
Maturity date			Jun. 01, 2015
Debt instrument, term			2 years