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Pension Liabilities (Schedule Of Expected Benefit Payments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Pension Liabilities [Abstract]  
2015 $ 855us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
2016 684us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
2017 684us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
2018 684us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
2019 684us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
Thereafter 4,004rdi_DefinedBenefitPlanExpectedFuturePaymentsAfterFiveYears
Total pension payments $ 7,595rdi_DefinedBenefitPlanExpectedFuturePayments