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Other Assets, Net Other Assets, Net (Components of Other Assets Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Front Range Village  
Business Acquisition [Line Items]  
Public improvement fee $ 17.3rpt_OtherAssetsPublicImprovementFeeNet
/ us-gaap_BusinessAcquisitionAxis
= rpt_FrontRangeVillageMember
Buttermilk Towne Center  
Business Acquisition [Line Items]  
Real estate tax exemption $ 6.0rpt_OtherAssetsRealEstateTaxExemptionNet
/ us-gaap_BusinessAcquisitionAxis
= rpt_ButtermilkTowneCenterMember