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Nature of Business and Financial Statement Presentation - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Nature Of Business And Financial Statement Presentation [Line Items]
Prepay of taxes	$ 20,200,000us-gaap_PrepaidTaxes
Tax expense	4,900,000us-gaap_IncomeTaxExpenseBenefit	684,000us-gaap_IncomeTaxExpenseBenefit
Puerto Rico Tax Restructuring [Member]
Nature Of Business And Financial Statement Presentation [Line Items]
Number of assets owned	15ddr_NumberOfAssetsOwned / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember
Prepay of taxes	20,200,000us-gaap_PrepaidTaxes / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember
Effective tax rate	10.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember
Taxable REIT subsidiary activity	16,800,000ddr_TaxableRealEstateInvestmentTrustSubsidiaryActivity / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember
Tax expense	$ 3,400,000us-gaap_IncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember
Effective tax rate spread	2.00%ddr_EffectiveIncomeTaxRateSpread / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember
Effective tax payment percent	12.00%ddr_EffectiveIncomeTaxContinuingOperationsPaymentRate / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember
Old Tax Rate [Member] | Puerto Rico Tax Restructuring [Member]
Nature Of Business And Financial Statement Presentation [Line Items]
Effective tax rate on capital gains	29.00%ddr_EffectiveCapitalGainTaxRate / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember / us-gaap_StatementScenarioAxis = ddr_OldTaxRateMember
Effective tax rate	39.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember / us-gaap_StatementScenarioAxis = ddr_OldTaxRateMember
New Tax Rate [Member] | Puerto Rico Tax Restructuring [Member]
Nature Of Business And Financial Statement Presentation [Line Items]
Effective tax rate on capital gains	12.00%ddr_EffectiveCapitalGainTaxRate / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember / us-gaap_StatementScenarioAxis = ddr_NewTaxRateMember
Effective tax rate	10.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityNameAxis = ddr_PuertoRicoTaxRestructuringMember / us-gaap_StatementScenarioAxis = ddr_NewTaxRateMember

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-Name Accounting Standards Codification

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