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Other Liabilities (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Other Liabilities [Line Items]    
Property asset $ 186,889,000us-gaap_PropertyPlantAndEquipmentNet $ 191,660,000us-gaap_PropertyPlantAndEquipmentNet
Current capital lease liability 5,900,000us-gaap_CapitalLeaseObligationsCurrent 5,900,000us-gaap_CapitalLeaseObligationsCurrent
Sutton Hill Capital, LLC [Member]    
Other Liabilities [Line Items]    
Lease term 10 years  
Lease expiration date Jun. 30, 2020  
Purchase option 5,900,000us-gaap_PurchaseOptionsLand
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rdi_SuttonHillCapitalLlcMember		  
Property asset 4,700,000us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rdi_SuttonHillCapitalLlcMember		  
Current capital lease liability 5,900,000us-gaap_CapitalLeaseObligationsCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rdi_SuttonHillCapitalLlcMember		  
Minimum [Member]    
Other Liabilities [Line Items]    
Lease term 1 year  
Minimum [Member] | Sutton Hill Capital, LLC [Member]    
Other Liabilities [Line Items]    
Purchase option $ 100,000us-gaap_PurchaseOptionsLand
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rdi_SuttonHillCapitalLlcMember