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

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