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Commitments And Contingencies (Details)							0 Months Ended				12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Rialto Distribution [Member] USD ($)	Dec. 31, 2014 Rialto Distribution [Member] NZD	Dec. 31, 2013 Rialto Distribution [Member] USD ($)	Dec. 31, 2013 Rialto Distribution [Member] NZD	Oct. 26, 2011 IRS [Member] USD ($)	Jan. 06, 2011 IRS [Member] USD ($)	Dec. 31, 2014 IRS [Member] USD ($)	Dec. 31, 2013 IRS [Member] USD ($)	Dec. 31, 2014 State [Member] USD ($)
Commitments And Contingencies [Line Items]
Ownership percentage in equity method investment			33.30%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember	33.30%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember
Line of credit facility			$ 1,600,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember	2,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember	$ 1,600,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember	2,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember
Line of credit facility, amount outstanding			592,000us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember	760,000us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember	634,000us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember	770,000us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = rdi_RialtoDistributionMember
Percentage of claim adjustment conceded to income								70.00%rdi_PercentageOfClaimAdjustmentConcededToIncome / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Unpaid tax of wholly owned subsidiary								20,900,000rdi_UnpaidTaxOfWhollyOwnedSubsidiary / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Income tax obligation								5,400,000rdi_IncomeTaxExaminationIncomeTaxObligation / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Reduction of income tax obligation, income tax refund								800,000rdi_IncomeTaxExaminationReductionOfIncomeTaxObligation / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Increase in income tax obligation, interest expense								9,300,000us-gaap_IncomeTaxExaminationInterestExpense / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Total federal tax liability								13,900,000us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Monthly income tax liability Payment							290,000rdi_MonthlyIncomeTaxLiabilityPayment / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Period of monthly income tax liability payments							5 years
Taxes and interest payable	5,300,000rdi_TaxesAndInterestPayable	8,300,000rdi_TaxesAndInterestPayable
Current taxes payable									3,500,000rdi_TaxesAndInterestPayableCurrent / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember	3,500,000rdi_TaxesAndInterestPayableCurrent / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember
Possible obligation											$ 1,400,000us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember

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Income Tax Examination, Income Tax Obligation

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Percentage Of Claim Adjustment Conceded To Income

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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-Name Accounting Standards Codification

-Topic 323

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Estimated amount of loss resulting from an adverse tax position.

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Amount borrowed under the credit facility as of the balance sheet date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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