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Schedule III - Real Estate And Accumulated Depreciation (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Gross Leasable Area	9,246,984cdr_GrossLeasableArea
Initial cost to the Company, Land	320,087,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand
Initial cost to the Company, Building and Improvements	863,457,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements
Subsequent cost capitalized	292,629,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
Gross carrying amount of Land	312,868,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand
Gross carrying amount of building and improvements	1,163,305,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements
SEC Schedule III, Real Estate, Gross, Total	1,476,173,000us-gaap_RealEstateGrossAtCarryingValue	1,450,951,000us-gaap_RealEstateGrossAtCarryingValue	1,423,979,000us-gaap_RealEstateGrossAtCarryingValue	1,321,083,000us-gaap_RealEstateGrossAtCarryingValue
Accumulated Depreciation	267,211,000us-gaap_RealEstateAccumulatedDepreciation	251,605,000us-gaap_RealEstateAccumulatedDepreciation	229,535,000us-gaap_RealEstateAccumulatedDepreciation	189,608,000us-gaap_RealEstateAccumulatedDepreciation
Amount of Encumbrance	393,388,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Building and improvements estimated useful life	3 years
Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Building and improvements estimated useful life	40 years
Academy Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2001
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
Gross Leasable Area	137,415cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
Initial cost to the Company, Land	2,406,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
Initial cost to the Company, Building and Improvements	9,623,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
Subsequent cost capitalized	3,841,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
Gross carrying amount of Land	2,406,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
Gross carrying amount of building and improvements	13,464,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
SEC Schedule III, Real Estate, Gross, Total	15,870,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
Accumulated Depreciation	4,089,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember
Academy Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1965
Academy Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2013
Big Y Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2013
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember
Year built/Year last renovated	2007
Gross Leasable Area	101,105cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember
Initial cost to the Company, Land	11,272,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember
Initial cost to the Company, Building and Improvements	23,395,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember
Gross carrying amount of Land	11,272,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember
Gross carrying amount of building and improvements	23,395,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember
SEC Schedule III, Real Estate, Gross, Total	34,667,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember
Accumulated Depreciation	987,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember
Camp Hill [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2002
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Gross Leasable Area	461,560cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Initial cost to the Company, Land	4,460,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Initial cost to the Company, Building and Improvements	17,857,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Subsequent cost capitalized	43,688,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Gross carrying amount of Land	4,424,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Gross carrying amount of building and improvements	61,581,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
SEC Schedule III, Real Estate, Gross, Total	66,005,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Accumulated Depreciation	16,326,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Amount of Encumbrance	62,464,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember
Camp Hill [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1958
Camp Hill [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2005
Carll's Corner [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
Gross Leasable Area	129,582cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
Initial cost to the Company, Land	3,034,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
Initial cost to the Company, Building and Improvements	15,293,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
Subsequent cost capitalized	(954,000)us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
Gross carrying amount of Land	2,898,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
Gross carrying amount of building and improvements	14,475,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
SEC Schedule III, Real Estate, Gross, Total	17,373,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
Accumulated Depreciation	3,649,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember
Carll's Corner [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1960
Carll's Corner [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1999
Carmans Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Gross Leasable Area	194,082cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Initial cost to the Company, Land	8,539,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Initial cost to the Company, Building and Improvements	35,804,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Subsequent cost capitalized	(203,000)us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Gross carrying amount of Land	8,421,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Gross carrying amount of building and improvements	35,719,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
SEC Schedule III, Real Estate, Gross, Total	44,140,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Accumulated Depreciation	8,397,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Amount of Encumbrance	33,460,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember
Carmans Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1954
Carmans Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2007
Coliseum Marketplace [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
Gross Leasable Area	106,648cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
Initial cost to the Company, Land	2,924,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
Initial cost to the Company, Building and Improvements	14,416,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
Subsequent cost capitalized	5,424,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
Gross carrying amount of Land	3,586,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
Gross carrying amount of building and improvements	19,178,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
SEC Schedule III, Real Estate, Gross, Total	22,764,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
Accumulated Depreciation	5,332,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember
Coliseum Marketplace [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1987
Coliseum Marketplace [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2012
Colonial Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2011
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Gross Leasable Area	461,914cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Initial cost to the Company, Land	9,367,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Initial cost to the Company, Building and Improvements	37,496,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Subsequent cost capitalized	3,342,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Gross carrying amount of Land	9,367,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Gross carrying amount of building and improvements	40,838,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
SEC Schedule III, Real Estate, Gross, Total	50,205,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Accumulated Depreciation	6,792,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Amount of Encumbrance	26,267,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember
Colonial Commons [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2011
Colonial Commons [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2013
Crossroads II [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2008
Percent Owned	60.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember
Year built/Year last renovated	2009
Gross Leasable Area	133,717cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember
Initial cost to the Company, Land	15,383,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember
Subsequent cost capitalized	28,778,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember
Gross carrying amount of Land	17,671,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember
Gross carrying amount of building and improvements	26,490,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember
SEC Schedule III, Real Estate, Gross, Total	44,161,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember
Accumulated Depreciation	3,673,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember
Elmhurst Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2006
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
Gross Leasable Area	66,250cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
Initial cost to the Company, Land	1,371,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
Initial cost to the Company, Building and Improvements	5,994,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
Subsequent cost capitalized	730,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
Gross carrying amount of Land	1,371,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
Gross carrying amount of building and improvements	6,724,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
SEC Schedule III, Real Estate, Gross, Total	8,095,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
Accumulated Depreciation	1,814,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember
Elmhurst Square [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1961
Elmhurst Square [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1983
Fairview Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
Gross Leasable Area	42,314cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
Initial cost to the Company, Land	858,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
Initial cost to the Company, Building and Improvements	3,568,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
Subsequent cost capitalized	3,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
Gross carrying amount of Land	858,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
Gross carrying amount of building and improvements	3,571,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
SEC Schedule III, Real Estate, Gross, Total	4,429,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
Accumulated Depreciation	965,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember
Fairview Commons [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1976
Fairview Commons [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2003
Fieldstone Marketplace [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
Gross Leasable Area	193,970cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
Initial cost to the Company, Land	5,229,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
Initial cost to the Company, Building and Improvements	21,440,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
Subsequent cost capitalized	646,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
Gross carrying amount of Land	5,167,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
Gross carrying amount of building and improvements	22,148,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
SEC Schedule III, Real Estate, Gross, Total	27,315,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
Accumulated Depreciation	6,394,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember
Fieldstone Marketplace [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Year built/Year last renovated	1988
Fieldstone Marketplace [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2012
Year built/Year last renovated	2003
Fort Washington Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2002
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember
Year built/Year last renovated	2003
Gross Leasable Area	41,000cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember
Initial cost to the Company, Land	2,462,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember
Subsequent cost capitalized	5,176,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember
Gross carrying amount of Land	2,462,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember
Gross carrying amount of building and improvements	5,176,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember
SEC Schedule III, Real Estate, Gross, Total	7,638,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember
Accumulated Depreciation	1,710,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember
Franklin Village Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Gross Leasable Area	303,085cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Initial cost to the Company, Land	14,270,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Initial cost to the Company, Building and Improvements	61,915,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Subsequent cost capitalized	953,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Gross carrying amount of Land	14,681,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Gross carrying amount of building and improvements	62,457,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
SEC Schedule III, Real Estate, Gross, Total	77,138,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Accumulated Depreciation	5,658,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Amount of Encumbrance	41,979,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember
Franklin Village Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2004
Year built/Year last renovated	1987
Franklin Village Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2012
Year built/Year last renovated	2005
Fredericksburg Way [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember
Year built/Year last renovated	1997
Gross Leasable Area	63,000cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember
Initial cost to the Company, Land	3,213,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember
Initial cost to the Company, Building and Improvements	12,758,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember
Gross carrying amount of Land	3,213,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember
Gross carrying amount of building and improvements	12,758,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember
SEC Schedule III, Real Estate, Gross, Total	15,971,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember
Accumulated Depreciation	3,386,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember
General Booth Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
Year built/Year last renovated	1985
Gross Leasable Area	71,639cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
Initial cost to the Company, Land	1,935,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
Initial cost to the Company, Building and Improvements	9,493,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
Subsequent cost capitalized	347,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
Gross carrying amount of Land	1,935,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
Gross carrying amount of building and improvements	9,840,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
SEC Schedule III, Real Estate, Gross, Total	11,775,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
Accumulated Depreciation	3,337,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember
Glen Allen Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
Year built/Year last renovated	2000
Gross Leasable Area	63,328cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
Initial cost to the Company, Land	6,769,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
Initial cost to the Company, Building and Improvements	683,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
Subsequent cost capitalized	3,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
Gross carrying amount of Land	5,367,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
Gross carrying amount of building and improvements	2,088,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
SEC Schedule III, Real Estate, Gross, Total	7,455,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
Accumulated Depreciation	646,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember
Gold Star Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2006
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Year built/Year last renovated	1988
Gross Leasable Area	71,720cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Initial cost to the Company, Land	1,644,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Initial cost to the Company, Building and Improvements	6,519,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Subsequent cost capitalized	410,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Gross carrying amount of Land	1,644,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Gross carrying amount of building and improvements	6,929,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
SEC Schedule III, Real Estate, Gross, Total	8,573,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Accumulated Depreciation	2,038,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Amount of Encumbrance	1,302,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember
Golden Triangle [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Gross Leasable Area	202,943cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Initial cost to the Company, Land	2,320,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Initial cost to the Company, Building and Improvements	9,713,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Subsequent cost capitalized	9,935,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Gross carrying amount of Land	2,320,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Gross carrying amount of building and improvements	19,648,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
SEC Schedule III, Real Estate, Gross, Total	21,968,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Accumulated Depreciation	6,949,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Amount of Encumbrance	19,320,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember
Golden Triangle [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1960
Golden Triangle [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2005
Groton Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Year built/Year last renovated	1969
Gross Leasable Area	117,186cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Initial cost to the Company, Land	3,070,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Initial cost to the Company, Building and Improvements	12,320,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Subsequent cost capitalized	419,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Gross carrying amount of Land	3,073,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Gross carrying amount of building and improvements	12,736,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
SEC Schedule III, Real Estate, Gross, Total	15,809,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Accumulated Depreciation	3,328,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Amount of Encumbrance	11,015,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember
Halifax Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
Year built/Year last renovated	1994
Gross Leasable Area	51,510cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
Initial cost to the Company, Land	1,412,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
Initial cost to the Company, Building and Improvements	5,799,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
Subsequent cost capitalized	247,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
Gross carrying amount of Land	1,347,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
Gross carrying amount of building and improvements	6,111,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
SEC Schedule III, Real Estate, Gross, Total	7,458,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
Accumulated Depreciation	1,917,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember
Hamburg Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2004
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Gross Leasable Area	99,580cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Initial cost to the Company, Land	1,153,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Initial cost to the Company, Building and Improvements	4,678,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Subsequent cost capitalized	5,511,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Gross carrying amount of Land	1,153,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Gross carrying amount of building and improvements	10,189,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
SEC Schedule III, Real Estate, Gross, Total	11,342,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Accumulated Depreciation	2,578,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Amount of Encumbrance	4,732,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember
Hamburg Square [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1993
Hamburg Square [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2010
Jordan Lane [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Gross Leasable Area	177,504cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Initial cost to the Company, Land	4,291,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Initial cost to the Company, Building and Improvements	21,176,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Subsequent cost capitalized	1,319,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Gross carrying amount of Land	4,291,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Gross carrying amount of building and improvements	22,495,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
SEC Schedule III, Real Estate, Gross, Total	26,786,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Accumulated Depreciation	6,439,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Amount of Encumbrance	11,851,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember
Jordan Lane [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1969
Jordan Lane [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1991
Kempsville Crossing [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
Gross Leasable Area	79,512cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
Initial cost to the Company, Land	2,207,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
Initial cost to the Company, Building and Improvements	11,000,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
Subsequent cost capitalized	(1,437,000)us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
Gross carrying amount of Land	2,207,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
Gross carrying amount of building and improvements	9,563,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
SEC Schedule III, Real Estate, Gross, Total	11,770,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
Accumulated Depreciation	3,828,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember
Kempsville Crossing [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1985
Kempsville Crossing [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2013
Kenley Village [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
Year built/Year last renovated	1988
Gross Leasable Area	51,894cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
Initial cost to the Company, Land	726,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
Initial cost to the Company, Building and Improvements	3,512,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
Subsequent cost capitalized	361,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
Gross carrying amount of Land	726,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
Gross carrying amount of building and improvements	3,873,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
SEC Schedule III, Real Estate, Gross, Total	4,599,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
Accumulated Depreciation	1,379,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember
Kings Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
Gross Leasable Area	168,243cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
Initial cost to the Company, Land	2,413,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
Initial cost to the Company, Building and Improvements	12,604,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
Subsequent cost capitalized	413,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
Gross carrying amount of Land	2,408,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
Gross carrying amount of building and improvements	13,022,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
SEC Schedule III, Real Estate, Gross, Total	15,430,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
Accumulated Depreciation	3,288,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember
Kings Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1970
Kings Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1994
Maxatawny Marketplace [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2011
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember
Year built/Year last renovated	2014
Gross Leasable Area	58,339cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember
Initial cost to the Company, Land	1,612,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember
Subsequent cost capitalized	8,821,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember
Gross carrying amount of Land	1,454,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember
Gross carrying amount of building and improvements	8,979,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember
SEC Schedule III, Real Estate, Gross, Total	10,433,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember
Accumulated Depreciation	383,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember
Meadows Marketplace [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
Year built/Year last renovated	2005
Gross Leasable Area	91,518cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
Initial cost to the Company, Land	1,914,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
Subsequent cost capitalized	11,407,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
Gross carrying amount of Land	1,914,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
Gross carrying amount of building and improvements	11,407,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
SEC Schedule III, Real Estate, Gross, Total	13,321,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
Accumulated Depreciation	2,571,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
Amount of Encumbrance	9,432,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember
Meadows Marketplace [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2004
Meadows Marketplace [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2012
Mechanicsburg Giant [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember
Year built/Year last renovated	2003
Gross Leasable Area	51,500cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember
Initial cost to the Company, Land	2,709,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember
Initial cost to the Company, Building and Improvements	12,159,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember
Gross carrying amount of Land	2,709,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember
Gross carrying amount of building and improvements	12,159,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember
SEC Schedule III, Real Estate, Gross, Total	14,868,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember
Accumulated Depreciation	3,136,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember
Metro Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2008
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Year built/Year last renovated	1999
Gross Leasable Area	71,896cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Initial cost to the Company, Land	3,121,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Initial cost to the Company, Building and Improvements	12,341,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Subsequent cost capitalized	(301,000)us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Gross carrying amount of Land	5,250,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Gross carrying amount of building and improvements	9,911,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
SEC Schedule III, Real Estate, Gross, Total	15,161,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Accumulated Depreciation	1,892,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Amount of Encumbrance	8,005,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember
Newport Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
Year built/Year last renovated	1996
Gross Leasable Area	64,489cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
Initial cost to the Company, Land	1,721,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
Initial cost to the Company, Building and Improvements	7,758,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
Subsequent cost capitalized	399,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
Gross carrying amount of Land	1,682,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
Gross carrying amount of building and improvements	8,196,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
SEC Schedule III, Real Estate, Gross, Total	9,878,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
Accumulated Depreciation	2,436,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember
New London Mall [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2009
Percent Owned	40.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
Gross Leasable Area	259,566cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
Initial cost to the Company, Land	14,891,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
Initial cost to the Company, Building and Improvements	24,967,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
Subsequent cost capitalized	1,146,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
Gross carrying amount of Land	8,807,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
Gross carrying amount of building and improvements	32,197,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
SEC Schedule III, Real Estate, Gross, Total	41,004,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
Accumulated Depreciation	8,390,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
Amount of Encumbrance	27,291,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember
New London Mall [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1967
New London Mall [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1997
Northside Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2008
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember
Year built/Year last renovated	2009
Gross Leasable Area	69,136cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember
Initial cost to the Company, Land	3,332,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember
Subsequent cost capitalized	10,012,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember
Gross carrying amount of Land	3,379,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember
Gross carrying amount of building and improvements	9,965,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember
SEC Schedule III, Real Estate, Gross, Total	13,344,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember
Accumulated Depreciation	1,320,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember
Norwood Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2006
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
Gross Leasable Area	102,459cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
Initial cost to the Company, Land	1,874,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
Initial cost to the Company, Building and Improvements	8,453,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
Subsequent cost capitalized	1,640,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
Gross carrying amount of Land	1,874,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
Gross carrying amount of building and improvements	10,093,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
SEC Schedule III, Real Estate, Gross, Total	11,967,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
Accumulated Depreciation	2,735,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember
Norwood Shopping Center [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1965
Norwood Shopping Center [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2013
Oak Ridge Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2006
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Year built/Year last renovated	2000
Gross Leasable Area	38,700cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Initial cost to the Company, Land	960,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Initial cost to the Company, Building and Improvements	4,254,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Subsequent cost capitalized	45,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Gross carrying amount of Land	960,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Gross carrying amount of building and improvements	4,299,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
SEC Schedule III, Real Estate, Gross, Total	5,259,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Accumulated Depreciation	1,079,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Amount of Encumbrance	3,166,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember
Oakland Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
Gross Leasable Area	90,100cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
Initial cost to the Company, Land	2,504,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
Initial cost to the Company, Building and Improvements	15,662,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
Subsequent cost capitalized	(233,000)us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
Gross carrying amount of Land	2,504,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
Gross carrying amount of building and improvements	15,429,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
SEC Schedule III, Real Estate, Gross, Total	17,933,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
Accumulated Depreciation	3,739,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember
Oakland Commons [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1962
Oakland Commons [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2013
Oakland Mills [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Gross Leasable Area	58,224cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Initial cost to the Company, Land	1,611,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Initial cost to the Company, Building and Improvements	6,292,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Subsequent cost capitalized	41,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Gross carrying amount of Land	1,611,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Gross carrying amount of building and improvements	6,333,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
SEC Schedule III, Real Estate, Gross, Total	7,944,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Accumulated Depreciation	2,051,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Amount of Encumbrance	4,457,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember
Oakland Mills [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1960
Oakland Mills [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2004
Palmyra Shopping Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
Gross Leasable Area	111,051cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
Initial cost to the Company, Land	1,488,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
Initial cost to the Company, Building and Improvements	6,566,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
Subsequent cost capitalized	1,394,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
Gross carrying amount of Land	1,488,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
Gross carrying amount of building and improvements	7,960,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
SEC Schedule III, Real Estate, Gross, Total	9,448,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
Accumulated Depreciation	2,321,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember
Palmyra Shopping Center [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1960
Palmyra Shopping Center [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2012
Pine Grove Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Gross Leasable Area	86,089cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Initial cost to the Company, Land	2,010,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Initial cost to the Company, Building and Improvements	6,489,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Subsequent cost capitalized	476,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Gross carrying amount of Land	2,010,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Gross carrying amount of building and improvements	6,965,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
SEC Schedule III, Real Estate, Gross, Total	8,975,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Accumulated Depreciation	1,978,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Amount of Encumbrance	5,197,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember
Pine Grove Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2001
Pine Grove Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2002
Port Richmond Village [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2001
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
Year built/Year last renovated	1988
Gross Leasable Area	154,908cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
Initial cost to the Company, Land	2,942,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
Initial cost to the Company, Building and Improvements	11,769,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
Subsequent cost capitalized	1,408,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
Gross carrying amount of Land	2,843,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
Gross carrying amount of building and improvements	13,276,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
SEC Schedule III, Real Estate, Gross, Total	16,119,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
Accumulated Depreciation	4,517,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember
Quartermaster Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2014
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
Year built/Year last renovated	2004
Gross Leasable Area	456,364cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
Initial cost to the Company, Land	37,031,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
Initial cost to the Company, Building and Improvements	54,210,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
Subsequent cost capitalized	79,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
Gross carrying amount of Land	37,031,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
Gross carrying amount of building and improvements	54,289,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
SEC Schedule III, Real Estate, Gross, Total	91,320,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
Accumulated Depreciation	1,436,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
Amount of Encumbrance	41,786,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember
River View Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
Gross Leasable Area	226,786cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
Initial cost to the Company, Land	9,718,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
Initial cost to the Company, Building and Improvements	40,356,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
Subsequent cost capitalized	4,987,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
Gross carrying amount of Land	9,718,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
Gross carrying amount of building and improvements	45,343,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
SEC Schedule III, Real Estate, Gross, Total	55,061,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
Accumulated Depreciation	13,310,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember
River View Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1991
River View Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1998
San Souci Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2009
Percent Owned	40.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
Gross Leasable Area	264,134cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
Initial cost to the Company, Land	14,849,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
Initial cost to the Company, Building and Improvements	18,445,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
Subsequent cost capitalized	1,947,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
Gross carrying amount of Land	13,406,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
Gross carrying amount of building and improvements	21,835,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
SEC Schedule III, Real Estate, Gross, Total	35,241,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
Accumulated Depreciation	7,638,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
Amount of Encumbrance	27,200,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember
San Souci Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1985
San Souci Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1997
South Philadelphia [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
Gross Leasable Area	283,415cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
Initial cost to the Company, Land	8,222,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
Initial cost to the Company, Building and Improvements	36,314,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
Subsequent cost capitalized	2,779,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
Gross carrying amount of Land	8,222,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
Gross carrying amount of building and improvements	39,093,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
SEC Schedule III, Real Estate, Gross, Total	47,315,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
Accumulated Depreciation	13,469,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember
South Philadelphia [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1950
South Philadelphia [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2003
Southington Center [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember
Gross Leasable Area	155,842cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember
Initial cost to the Company, Building and Improvements	11,834,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember
Subsequent cost capitalized	193,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember
Gross carrying amount of building and improvements	12,027,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember
SEC Schedule III, Real Estate, Gross, Total	12,027,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember
Accumulated Depreciation	3,411,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember
Amount of Encumbrance	5,209,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember
Southington Center [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1972
Southington Center [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2000
Suffolk Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
Year built/Year last renovated	1984
Gross Leasable Area	67,216cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
Initial cost to the Company, Land	1,402,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
Initial cost to the Company, Building and Improvements	7,236,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
Subsequent cost capitalized	23,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
Gross carrying amount of Land	1,402,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
Gross carrying amount of building and improvements	7,259,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
SEC Schedule III, Real Estate, Gross, Total	8,661,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
Accumulated Depreciation	2,720,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember
Swede Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Gross Leasable Area	100,816cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Initial cost to the Company, Land	2,268,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Initial cost to the Company, Building and Improvements	6,232,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Subsequent cost capitalized	5,701,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Gross carrying amount of Land	2,272,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Gross carrying amount of building and improvements	11,929,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
SEC Schedule III, Real Estate, Gross, Total	14,201,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Accumulated Depreciation	4,281,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Amount of Encumbrance	9,999,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember
Swede Square [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1980
Swede Square [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2012
The Brickyard [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2004
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
Gross Leasable Area	227,193cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
Initial cost to the Company, Land	7,632,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
Initial cost to the Company, Building and Improvements	29,308,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
Subsequent cost capitalized	1,576,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
Gross carrying amount of Land	7,648,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
Gross carrying amount of building and improvements	30,868,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
SEC Schedule III, Real Estate, Gross, Total	38,516,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
Accumulated Depreciation	8,317,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember
The Brickyard [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1990
The Brickyard [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2012
The Commons [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2004
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
Year built/Year last renovated	2003
Gross Leasable Area	203,426cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
Initial cost to the Company, Land	3,098,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
Initial cost to the Company, Building and Improvements	14,047,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
Subsequent cost capitalized	2,934,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
Gross carrying amount of Land	3,098,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
Gross carrying amount of building and improvements	16,981,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
SEC Schedule III, Real Estate, Gross, Total	20,079,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
Accumulated Depreciation	5,383,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember
The Point [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2000
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
Gross Leasable Area	268,037cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
Initial cost to the Company, Land	2,700,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
Initial cost to the Company, Building and Improvements	10,800,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
Subsequent cost capitalized	14,670,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
Gross carrying amount of Land	2,996,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
Gross carrying amount of building and improvements	25,174,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
SEC Schedule III, Real Estate, Gross, Total	28,170,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
Accumulated Depreciation	7,905,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
Amount of Encumbrance	29,001,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember
The Point [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1972
The Point [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2012
The Shops at Suffolk Downs [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
Gross Leasable Area	121,320cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
Initial cost to the Company, Land	7,580,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
Initial cost to the Company, Building and Improvements	11,089,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
Subsequent cost capitalized	9,439,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
Gross carrying amount of Land	7,580,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
Gross carrying amount of building and improvements	20,528,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
SEC Schedule III, Real Estate, Gross, Total	28,108,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
Accumulated Depreciation	4,326,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember
The Shops at Suffolk Downs [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2005
The Shops at Suffolk Downs [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2011
Timpany Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
Gross Leasable Area	183,775cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
Initial cost to the Company, Land	3,412,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
Initial cost to the Company, Building and Improvements	19,240,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
Subsequent cost capitalized	1,343,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
Gross carrying amount of Land	3,368,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
Gross carrying amount of building and improvements	20,627,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
SEC Schedule III, Real Estate, Gross, Total	23,995,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
Accumulated Depreciation	4,545,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember
Timpany Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1970
Timpany Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1989
Trexler Mall [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2005
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
Gross Leasable Area	339,279cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
Initial cost to the Company, Land	6,932,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
Initial cost to the Company, Building and Improvements	32,815,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
Subsequent cost capitalized	6,312,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
Gross carrying amount of Land	6,932,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
Gross carrying amount of building and improvements	39,127,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
SEC Schedule III, Real Estate, Gross, Total	46,059,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
Accumulated Depreciation	9,808,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember
Trexler Mall [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1973
Trexler Mall [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2013
Trexlertown Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2006
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
Gross Leasable Area	313,929cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
Initial cost to the Company, Land	13,349,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
Initial cost to the Company, Building and Improvements	23,867,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
Subsequent cost capitalized	25,177,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
Gross carrying amount of Land	13,351,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
Gross carrying amount of building and improvements	49,042,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
SEC Schedule III, Real Estate, Gross, Total	62,393,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
Accumulated Depreciation	7,266,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember
Trexlertown Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1990
Trexlertown Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2011
Upland Square [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember
Year built/Year last renovated	2009
Gross Leasable Area	394,598cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember
Initial cost to the Company, Land	28,187,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember
Subsequent cost capitalized	66,757,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember
Gross carrying amount of Land	25,783,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember
Gross carrying amount of building and improvements	69,161,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember
SEC Schedule III, Real Estate, Gross, Total	94,944,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember
Accumulated Depreciation	9,331,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember
Upland Square [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Upland Square [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2013
Valley Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2003
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
Gross Leasable Area	190,939cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
Initial cost to the Company, Land	1,950,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
Initial cost to the Company, Building and Improvements	7,766,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
Subsequent cost capitalized	1,102,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
Gross carrying amount of Land	1,950,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
Gross carrying amount of building and improvements	8,868,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
SEC Schedule III, Real Estate, Gross, Total	10,818,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
Accumulated Depreciation	2,709,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember
Valley Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1975
Valley Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1994
Washington Center Shoppes [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2001
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
Gross Leasable Area	157,394cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
Initial cost to the Company, Land	2,061,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
Initial cost to the Company, Building and Improvements	7,314,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
Subsequent cost capitalized	4,056,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
Gross carrying amount of Land	2,000,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
Gross carrying amount of building and improvements	11,431,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
SEC Schedule III, Real Estate, Gross, Total	13,431,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
Accumulated Depreciation	4,114,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember
Washington Center Shoppes [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1979
Washington Center Shoppes [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1995
Webster Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
Gross Leasable Area	101,824cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
Initial cost to the Company, Land	3,551,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
Initial cost to the Company, Building and Improvements	18,412,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
Subsequent cost capitalized	(211,000)us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
Gross carrying amount of Land	4,082,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
Gross carrying amount of building and improvements	17,670,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
SEC Schedule III, Real Estate, Gross, Total	21,752,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
Accumulated Depreciation	3,948,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember
Webster Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1960
Webster Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2004
West Bridgewater Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
Gross Leasable Area	133,039cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
Initial cost to the Company, Land	2,823,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
Initial cost to the Company, Building and Improvements	14,901,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
Subsequent cost capitalized	(809,000)us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
Gross carrying amount of Land	2,596,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
Gross carrying amount of building and improvements	14,319,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
SEC Schedule III, Real Estate, Gross, Total	16,915,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
Accumulated Depreciation	3,336,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
Amount of Encumbrance	10,255,000us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember
West Bridgewater Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1970
West Bridgewater Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2007
Yorktowne Plaza [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year acquired	2007
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
Gross Leasable Area	158,982cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
Initial cost to the Company, Land	5,940,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
Initial cost to the Company, Building and Improvements	25,505,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
Subsequent cost capitalized	451,000us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
Gross carrying amount of Land	5,799,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
Gross carrying amount of building and improvements	26,097,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
SEC Schedule III, Real Estate, Gross, Total	31,896,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
Accumulated Depreciation	6,511,000us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember
Yorktowne Plaza [Member] | Minimum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	1970
Yorktowne Plaza [Member] | Maximum [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Year built/Year last renovated	2000
Land Parcels [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Percent Owned	100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_LandParcelsMember
Initial cost to the Company, Land	1,965,000us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_LandParcelsMember
Subsequent cost capitalized	(1,084,000)us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_LandParcelsMember
Gross carrying amount of Land	881,000us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_LandParcelsMember
SEC Schedule III, Real Estate, Gross, Total	881,000us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_LandParcelsMember

X

- Definition

Gross Leasable Area

+ References

No definition available.

+ Details

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X

- Definition

Property Ownership Percentage

+ References

No definition available.

+ Details

Name:	cdr_PropertyOwnershipPercentage
Namespace Prefix:	cdr_
Data Type:	num:percentItemType
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X

- Definition

Real Estate And Accumulated Depreciation Year Acquired

+ References

No definition available.

+ Details

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Data Type:	xbrli:gYearItemType
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X

- Definition

Real Estate And Accumulated Depreciation Year Built Last Renovated

+ References

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