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Other Assets - Components of Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Intangible assets:
Total intangible assets, net	$ 364,368us-gaap_FiniteLivedIntangibleAssetsNet	$ 389,216us-gaap_FiniteLivedIntangibleAssetsNet
Other assets:
Prepaid expenses	24,954us-gaap_PrepaidExpenseCurrentAndNoncurrent	14,456us-gaap_PrepaidExpenseCurrentAndNoncurrent
Other assets	26,702us-gaap_OtherAssetsMiscellaneous	39,746us-gaap_OtherAssetsMiscellaneous
Deposits	7,944us-gaap_DepositsAssets	8,024us-gaap_DepositsAssets
Total other assets, net	423,968us-gaap_OtherAssets	451,442us-gaap_OtherAssets
In-Place Leases (Including Lease Origination Costs and Fair Market Value of Leases) [Member]
Intangible assets:
Total intangible assets, net	150,045us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMarketAdjustmentMember	160,351us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_LeasesAcquiredInPlaceMarketAdjustmentMember
Above-Market Rent, Net [Member]
Intangible assets:
Total intangible assets, net	53,721us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_AboveMarketLeasesMember	57,199us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_AboveMarketLeasesMember
Tenant Relations, Net [Member]
Intangible assets:
Total intangible assets, net	$ 160,602us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = ddr_TenantRelationsMember	$ 171,666us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = ddr_TenantRelationsMember

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Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment in the future.

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