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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Percentage of distributed taxable income to qualify as a REIT 90.00%ddr_PercentageOfDistributedTaxableIncomeToQualifyAsReit    
Number of years the Company distributed sufficient taxable income in order to meet REIT distribution requirements 3 years    
U.S. federal income taxes $ 0ddr_FederalIncomeTaxExpenseBenefit    
U.S. federal excise taxes 0ddr_FederalExciseTaxes    
Number of subsequent taxable years 4 years    
Tax cost basis of assets 10,600,000,000ddr_TaxCostBasisOfAssets 10,400,000,000ddr_TaxCostBasisOfAssets 8,700,000,000ddr_TaxCostBasisOfAssets
Net payment 1,600,000ddr_TaxPaymentMade 1,900,000ddr_TaxPaymentMade 1,100,000ddr_TaxPaymentMade
Net deferred tax assets 84,500,000ddr_DeferredTaxAsset1 86,500,000ddr_DeferredTaxAsset1  
Net operating loss carryforwards 36,400,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration    
Expiry of net operating loss carryforwards 2022 through 2034    
Puerto Rico [Member]      
Income Taxes [Line Items]      
Operating loss carryforwards $ 48,300,000us-gaap_OperatingLossCarryforwards
/ us-gaap_StatementGeographicalAxis
= country_PR