Investments In And Advances To Unconsolidated Joint Ventures And Entities (Schedule Of Balance Sheet And Statement Of Operations Data Of Unconsolidated Joint Ventures And Equity Method Investments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Current assets	$ 3,146	$ 3,255
Noncurrent assets	5,128	5,934
Current liabilities	2,427	2,516
Noncurrent liabilities	673	670
Members' equity	5,174	6,002
Total revenue	21,036	23,070	26,138
Net income	2,774	3,598	4,590
Mt. Gravatt [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	903	887
Noncurrent assets	2,621	3,288
Current liabilities	753	751
Noncurrent liabilities	68	30
Members' equity	2,703	3,394
Total revenue	10,503	12,949	15,236
Net income	$ 1,775	$ 2,923	$ 3,513

Investments In And Advances To Unconsolidated Joint Ventures And Entities (Schedule Of Balance Sheet And Statement Of Operations Data Of Unconsolidated Joint Ventures And Equity Method Investments) (Details) (USD $)
In Thousands, unless otherwise specified

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Schedule of Equity Method Investments [Line Items]

Current assets

$ 3,146us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets

$ 3,255us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets

Noncurrent assets

5,128us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets

5,934us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets

Current liabilities

2,427us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities

2,516us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities

Noncurrent liabilities

673us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities

670us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities

Members' equity

5,174us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity

6,002us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity

Total revenue

21,036us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue

23,070us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue

26,138us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue

Net income

2,774us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

3,598us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

4,590us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

Mt. Gravatt [Member]

Schedule of Equity Method Investments [Line Items]

Current assets

903us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets
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= rdi_MtGravattMember

887us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets
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= rdi_MtGravattMember

Noncurrent assets

2,621us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

3,288us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

Current liabilities

753us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

751us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

Noncurrent liabilities

68us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

30us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

Members' equity

2,703us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

3,394us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

Total revenue

10,503us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

12,949us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

15,236us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

Net income

$ 1,775us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

$ 2,923us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

$ 3,513us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattMember

- Definition

The amount of current assets reported by an equity method investment of the entity.

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- Definition

The amount of current liabilities reported by an equity method investment of the entity.

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Amount of equity, including noncontrolling interest, reported by an equity method investment of the entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

The amount of net income (loss) reported by an equity method investment of the entity.

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The amount of noncurrent assets reported by an equity method investment of the entity.

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- Definition

The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

+ References

No definition available.

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