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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended
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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 | $ 0 ddr_FederalIncomeTaxExpenseBenefit |  |
U.S. federal excise taxes | 0 ddr_FederalExciseTaxes |  |
Number of subsequent taxable years | 4 years |  |
Tax cost basis of assets | 10,600,000,000 ddr_TaxCostBasisOfAssets | 10,400,000,000 ddr_TaxCostBasisOfAssets | 8,700,000,000 ddr_TaxCostBasisOfAssets
Net payment | 1,600,000 ddr_TaxPaymentMade | 1,900,000 ddr_TaxPaymentMade | 1,100,000 ddr_TaxPaymentMade
Net deferred tax assets | 84,500,000 ddr_DeferredTaxAsset1 | 86,500,000 ddr_DeferredTaxAsset1 |
Net operating loss carryforwards | 36,400,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration |  |
Expiry of net operating loss carryforwards | 2022 through 2034 |  |
Puerto Rico [Member] |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards | $ 48,300,000 us-gaap_OperatingLossCarryforwards / us-gaap_StatementGeographicalAxis = country_PR |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset net attributable to deductible temporary differences and carryforwards. + References No definition available. + Details
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- Definition Federal excise taxes. + References No definition available. + Details
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- Definition Federal income tax expense benefit. + References No definition available. + Details
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- Details
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- Definition Percentage of distributed taxable income to qualify as reit. + References No definition available. + Details
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- Definition Period for which the company distributed sufficient taxable income in order to meet REIT distribution requirements. + References No definition available. + Details
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- Definition Future period for which the company may no longer be able to qualify as a REIT if the company does not qualify in the current year. + References No definition available. + Details
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- Definition Tax cost basis of assets. + References No definition available. + Details
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- Definition Tax payment made. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates. + References No definition available. + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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