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Commitments And Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Commitments And Contingencies [Abstract]    
Total debt of unconsolidated joint ventures and entities $ 569rdi_TotalDebtOfUnconsolidatedJointVentureAndEntities $ 592rdi_TotalDebtOfUnconsolidatedJointVentureAndEntities
Share of unconsolidated debt, based on ownership percentage $ 190rdi_ShareOfUnconsolidatedDebtBasedOnOurOwnershipPercentage $ 197rdi_ShareOfUnconsolidatedDebtBasedOnOurOwnershipPercentage