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Acquisitions - Summary of Acquired Shopping Centers (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Business Acquisition [Line Items] |  |
Aggregate gain on change in control of interests | $ 4,296 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain | $ 19,906 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
Blackstone II Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Aggregate gain on change in control of interests | 4,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneTwoAcquisitionMember |
Number of shopping centers | 7 ddr_NumberOfRealEstatePropertiesAcquired / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneTwoAcquisitionMember |
Blackstone I Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Aggregate gain on change in control of interests |  | $ 18,800 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneOneAcquisitionMember
Number of shopping centers |  | 30 ddr_NumberOfRealEstatePropertiesAcquired / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneOneAcquisitionMember
Shopping Center [Member] | Blackstone II Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Number of shopping centers | 7 ddr_NumberOfRealEstatePropertiesAcquired / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneTwoAcquisitionMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember |
Shopping Center [Member] | Blackstone I Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Number of shopping centers |  | 30 ddr_NumberOfRealEstatePropertiesAcquired / us-gaap_BusinessAcquisitionAxis = ddr_BlackstoneOneAcquisitionMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember
Shopping Center [Member] | Virginia [Member] | Richmond [Member] |  |
Business Acquisition [Line Items] |  |
Number of shopping centers |  | 2 ddr_NumberOfRealEstatePropertiesAcquired / invest_InvestmentGeographicRegionAxis = ddr_RichmondMember / us-gaap_StatementBusinessSegmentsAxis = ddr_ShoppingCenterMember / us-gaap_StatementGeographicalAxis = stpr_VA

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- Definition Number of real estate properties acquired. + References No definition available. + Details
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- Details
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- Definition In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |