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Acquisitions - Additional Information (Detail) (Shopping Center Acquired [Member], Orange County [Member], CA [Member], USD $)
In Millions, unless otherwise specified
 1 Months Ended
Mar. 31, 2015
ShoppingCenter
Shopping Center Acquired [Member] | Orange County [Member] | CA [Member]
  
Business Acquisition [Line Items]  
Business acquisitions value of acquired entity $ 49.2ddr_BusinessAcquisitionsValueOfAcquiredEntity
/ us-gaap_BusinessAcquisitionAxis
= ddr_ShoppingCentersAcquiredMember
/ invest_InvestmentGeographicRegionAxis
= ddr_OrangeCountyMember
/ us-gaap_StatementGeographicalAxis
= stpr_CA
Number Of Real Estate Properties Acquired 1ddr_AcquisitionOfJointVenturePartnersOwnershipInterestInShoppingCenters
/ us-gaap_BusinessAcquisitionAxis
= ddr_ShoppingCentersAcquiredMember
/ invest_InvestmentGeographicRegionAxis
= ddr_OrangeCountyMember
/ us-gaap_StatementGeographicalAxis
= stpr_CA
Ownership interest in joint venture 80.00%ddr_OwnershipInterestOfJointVenturePartner
/ us-gaap_BusinessAcquisitionAxis
= ddr_ShoppingCentersAcquiredMember
/ invest_InvestmentGeographicRegionAxis
= ddr_OrangeCountyMember
/ us-gaap_StatementGeographicalAxis
= stpr_CA