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Notes Payable (Schedule Of Future Principal Loan Payments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
2013 $ 38,104us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths  
2014 16,635us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo  
2015 1,635us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree  
2016 9,135us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour  
2017 70,615us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive  
Thereafter 27,912us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive  
Total future principal loan payments 164,036us-gaap_NotesPayable 168,460us-gaap_NotesPayable
Australia And New Zealand [Member]    
Debt Instrument [Line Items]    
Total future principal loan payments $ 77,400us-gaap_NotesPayable
/ us-gaap_StatementGeographicalAxis
= rdi_AustraliaAndNewZealandMember