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Investments In And Advances To Unconsolidated Joint Ventures And Entities (Summary Of Equity Earnings (Loss) From Investments In Unconsolidated Joint Ventures And Entities) (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]      
Total equity earnings $ 1,015us-gaap_IncomeLossFromEquityMethodInvestments $ 1,369us-gaap_IncomeLossFromEquityMethodInvestments $ 1,621us-gaap_IncomeLossFromEquityMethodInvestments
Rialto Distribution [Member]      
Schedule of Equity Method Investments [Line Items]      
Total investor share of earnings 120rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_RialtoDistributionMember
159rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_RialtoDistributionMember
199rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_RialtoDistributionMember
Rialto Cinemas [Member]      
Schedule of Equity Method Investments [Line Items]      
Total investor share of earnings 297rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_RialtoCinemasMember
221rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_RialtoCinemasMember
209rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_RialtoCinemasMember
205-209 East 57th Street Associates, LLC [Member]      
Schedule of Equity Method Investments [Line Items]      
Total investor share of earnings   (1)rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_TwoZeroFiveTwoZeroNineEastFiftySeventhStreetAssociatesLlcMember
27rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_TwoZeroFiveTwoZeroNineEastFiftySeventhStreetAssociatesLlcMember
Mt. Gravatt [Member]      
Schedule of Equity Method Investments [Line Items]      
Total investor share of earnings $ 598rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattCinemaMember
$ 990rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattCinemaMember
$ 1,186rdi_IncomeLossFromEquityMethodInvestmentsInvestorShare
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= rdi_MtGravattCinemaMember