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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 | 9,246,984 cdr_GrossLeasableArea |  |  |
Initial cost to the Company, Land | 320,087,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand |  |  |
Initial cost to the Company, Building and Improvements | 863,457,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements |  |  |
Subsequent cost capitalized | 292,629,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts |  |  |
Gross carrying amount of Land | 312,868,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand |  |  |
Gross carrying amount of building and improvements | 1,163,305,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements |  |  |
SEC Schedule III, Real Estate, Gross, Total | 1,476,173,000 us-gaap_RealEstateGrossAtCarryingValue | 1,450,951,000 us-gaap_RealEstateGrossAtCarryingValue | 1,423,979,000 us-gaap_RealEstateGrossAtCarryingValue | 1,321,083,000 us-gaap_RealEstateGrossAtCarryingValue
Accumulated Depreciation | 267,211,000 us-gaap_RealEstateAccumulatedDepreciation | 251,605,000 us-gaap_RealEstateAccumulatedDepreciation | 229,535,000 us-gaap_RealEstateAccumulatedDepreciation | 189,608,000 us-gaap_RealEstateAccumulatedDepreciation
Amount of Encumbrance | 393,388,000 us-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 | 137,415 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember |  |  |
Initial cost to the Company, Land | 2,406,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 9,623,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember |  |  |
Subsequent cost capitalized | 3,841,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember |  |  |
Gross carrying amount of Land | 2,406,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember |  |  |
Gross carrying amount of building and improvements | 13,464,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 15,870,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_AcademyPlazaMember |  |  |
Accumulated Depreciation | 4,089,000 us-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 | 101,105 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember |  |  |
Initial cost to the Company, Land | 11,272,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember |  |  |
Initial cost to the Company, Building and Improvements | 23,395,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember |  |  |
Gross carrying amount of Land | 11,272,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember |  |  |
Gross carrying amount of building and improvements | 23,395,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 34,667,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BigYShoppingCenterMember |  |  |
Accumulated Depreciation | 987,000 us-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 | 461,560 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember |  |  |
Initial cost to the Company, Land | 4,460,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember |  |  |
Initial cost to the Company, Building and Improvements | 17,857,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember |  |  |
Subsequent cost capitalized | 43,688,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember |  |  |
Gross carrying amount of Land | 4,424,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember |  |  |
Gross carrying amount of building and improvements | 61,581,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 66,005,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember |  |  |
Accumulated Depreciation | 16,326,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CampHillMember |  |  |
Amount of Encumbrance | 62,464,000 us-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 | 129,582 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember |  |  |
Initial cost to the Company, Land | 3,034,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember |  |  |
Initial cost to the Company, Building and Improvements | 15,293,000 us-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 | 2,898,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember |  |  |
Gross carrying amount of building and improvements | 14,475,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 17,373,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarllSCornerMember |  |  |
Accumulated Depreciation | 3,649,000 us-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 | 194,082 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember |  |  |
Initial cost to the Company, Land | 8,539,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 35,804,000 us-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 | 8,421,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember |  |  |
Gross carrying amount of building and improvements | 35,719,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 44,140,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember |  |  |
Accumulated Depreciation | 8,397,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CarmansPlazaMember |  |  |
Amount of Encumbrance | 33,460,000 us-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 | 106,648 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember |  |  |
Initial cost to the Company, Land | 2,924,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember |  |  |
Initial cost to the Company, Building and Improvements | 14,416,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember |  |  |
Subsequent cost capitalized | 5,424,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember |  |  |
Gross carrying amount of Land | 3,586,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember |  |  |
Gross carrying amount of building and improvements | 19,178,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 22,764,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColiseumMarketplaceMember |  |  |
Accumulated Depreciation | 5,332,000 us-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 | 461,914 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember |  |  |
Initial cost to the Company, Land | 9,367,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember |  |  |
Initial cost to the Company, Building and Improvements | 37,496,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember |  |  |
Subsequent cost capitalized | 3,342,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember |  |  |
Gross carrying amount of Land | 9,367,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember |  |  |
Gross carrying amount of building and improvements | 40,838,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 50,205,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember |  |  |
Accumulated Depreciation | 6,792,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ColonialCommonsMember |  |  |
Amount of Encumbrance | 26,267,000 us-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 | 133,717 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember |  |  |
Initial cost to the Company, Land | 15,383,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember |  |  |
Subsequent cost capitalized | 28,778,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember |  |  |
Gross carrying amount of Land | 17,671,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember |  |  |
Gross carrying amount of building and improvements | 26,490,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 44,161,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CrossroadsIIMember |  |  |
Accumulated Depreciation | 3,673,000 us-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 | 66,250 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember |  |  |
Initial cost to the Company, Land | 1,371,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember |  |  |
Initial cost to the Company, Building and Improvements | 5,994,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember |  |  |
Subsequent cost capitalized | 730,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember |  |  |
Gross carrying amount of Land | 1,371,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember |  |  |
Gross carrying amount of building and improvements | 6,724,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 8,095,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ElmhurstSquareMember |  |  |
Accumulated Depreciation | 1,814,000 us-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 | 42,314 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember |  |  |
Initial cost to the Company, Land | 858,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember |  |  |
Initial cost to the Company, Building and Improvements | 3,568,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember |  |  |
Subsequent cost capitalized | 3,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember |  |  |
Gross carrying amount of Land | 858,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember |  |  |
Gross carrying amount of building and improvements | 3,571,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 4,429,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FairviewCommonsMember |  |  |
Accumulated Depreciation | 965,000 us-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 | 193,970 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember |  |  |
Initial cost to the Company, Land | 5,229,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember |  |  |
Initial cost to the Company, Building and Improvements | 21,440,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember |  |  |
Subsequent cost capitalized | 646,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember |  |  |
Gross carrying amount of Land | 5,167,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember |  |  |
Gross carrying amount of building and improvements | 22,148,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 27,315,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FieldstoneMarketplaceMember |  |  |
Accumulated Depreciation | 6,394,000 us-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 | 41,000 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember |  |  |
Initial cost to the Company, Land | 2,462,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember |  |  |
Subsequent cost capitalized | 5,176,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember |  |  |
Gross carrying amount of Land | 2,462,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember |  |  |
Gross carrying amount of building and improvements | 5,176,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 7,638,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FortWashingtonMember |  |  |
Accumulated Depreciation | 1,710,000 us-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 | 303,085 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember |  |  |
Initial cost to the Company, Land | 14,270,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 61,915,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember |  |  |
Subsequent cost capitalized | 953,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember |  |  |
Gross carrying amount of Land | 14,681,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember |  |  |
Gross carrying amount of building and improvements | 62,457,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 77,138,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember |  |  |
Accumulated Depreciation | 5,658,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FranklinVillagePlazaMember |  |  |
Amount of Encumbrance | 41,979,000 us-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 | 63,000 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember |  |  |
Initial cost to the Company, Land | 3,213,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember |  |  |
Initial cost to the Company, Building and Improvements | 12,758,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember |  |  |
Gross carrying amount of Land | 3,213,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember |  |  |
Gross carrying amount of building and improvements | 12,758,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 15,971,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_FredericksburgWayMember |  |  |
Accumulated Depreciation | 3,386,000 us-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 | 71,639 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember |  |  |
Initial cost to the Company, Land | 1,935,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 9,493,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember |  |  |
Subsequent cost capitalized | 347,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember |  |  |
Gross carrying amount of Land | 1,935,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember |  |  |
Gross carrying amount of building and improvements | 9,840,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 11,775,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GeneralBoothPlazaMember |  |  |
Accumulated Depreciation | 3,337,000 us-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 | 63,328 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember |  |  |
Initial cost to the Company, Land | 6,769,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember |  |  |
Initial cost to the Company, Building and Improvements | 683,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember |  |  |
Subsequent cost capitalized | 3,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember |  |  |
Gross carrying amount of Land | 5,367,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember |  |  |
Gross carrying amount of building and improvements | 2,088,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 7,455,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GlenAllenShoppingCenterMember |  |  |
Accumulated Depreciation | 646,000 us-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 | 71,720 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember |  |  |
Initial cost to the Company, Land | 1,644,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 6,519,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember |  |  |
Subsequent cost capitalized | 410,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember |  |  |
Gross carrying amount of Land | 1,644,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember |  |  |
Gross carrying amount of building and improvements | 6,929,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 8,573,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember |  |  |
Accumulated Depreciation | 2,038,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldStarPlazaMember |  |  |
Amount of Encumbrance | 1,302,000 us-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 | 202,943 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember |  |  |
Initial cost to the Company, Land | 2,320,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember |  |  |
Initial cost to the Company, Building and Improvements | 9,713,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember |  |  |
Subsequent cost capitalized | 9,935,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember |  |  |
Gross carrying amount of Land | 2,320,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember |  |  |
Gross carrying amount of building and improvements | 19,648,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 21,968,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember |  |  |
Accumulated Depreciation | 6,949,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GoldenTriangleMember |  |  |
Amount of Encumbrance | 19,320,000 us-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 | 117,186 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember |  |  |
Initial cost to the Company, Land | 3,070,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember |  |  |
Initial cost to the Company, Building and Improvements | 12,320,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember |  |  |
Subsequent cost capitalized | 419,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember |  |  |
Gross carrying amount of Land | 3,073,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember |  |  |
Gross carrying amount of building and improvements | 12,736,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 15,809,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember |  |  |
Accumulated Depreciation | 3,328,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_GrotonShoppingCenterMember |  |  |
Amount of Encumbrance | 11,015,000 us-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 | 51,510 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember |  |  |
Initial cost to the Company, Land | 1,412,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 5,799,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember |  |  |
Subsequent cost capitalized | 247,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember |  |  |
Gross carrying amount of Land | 1,347,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember |  |  |
Gross carrying amount of building and improvements | 6,111,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 7,458,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HalifaxPlazaMember |  |  |
Accumulated Depreciation | 1,917,000 us-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 | 99,580 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember |  |  |
Initial cost to the Company, Land | 1,153,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember |  |  |
Initial cost to the Company, Building and Improvements | 4,678,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember |  |  |
Subsequent cost capitalized | 5,511,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember |  |  |
Gross carrying amount of Land | 1,153,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember |  |  |
Gross carrying amount of building and improvements | 10,189,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 11,342,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember |  |  |
Accumulated Depreciation | 2,578,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_HamburgSquareMember |  |  |
Amount of Encumbrance | 4,732,000 us-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 | 177,504 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember |  |  |
Initial cost to the Company, Land | 4,291,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember |  |  |
Initial cost to the Company, Building and Improvements | 21,176,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember |  |  |
Subsequent cost capitalized | 1,319,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember |  |  |
Gross carrying amount of Land | 4,291,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember |  |  |
Gross carrying amount of building and improvements | 22,495,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 26,786,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember |  |  |
Accumulated Depreciation | 6,439,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_JordanLaneMember |  |  |
Amount of Encumbrance | 11,851,000 us-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 | 79,512 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember |  |  |
Initial cost to the Company, Land | 2,207,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember |  |  |
Initial cost to the Company, Building and Improvements | 11,000,000 us-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 | 2,207,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember |  |  |
Gross carrying amount of building and improvements | 9,563,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 11,770,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KempsvilleCrossingMember |  |  |
Accumulated Depreciation | 3,828,000 us-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 | 51,894 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember |  |  |
Initial cost to the Company, Land | 726,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember |  |  |
Initial cost to the Company, Building and Improvements | 3,512,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember |  |  |
Subsequent cost capitalized | 361,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember |  |  |
Gross carrying amount of Land | 726,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember |  |  |
Gross carrying amount of building and improvements | 3,873,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 4,599,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KenleyVillageMember |  |  |
Accumulated Depreciation | 1,379,000 us-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 | 168,243 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember |  |  |
Initial cost to the Company, Land | 2,413,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 12,604,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember |  |  |
Subsequent cost capitalized | 413,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember |  |  |
Gross carrying amount of Land | 2,408,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember |  |  |
Gross carrying amount of building and improvements | 13,022,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 15,430,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_KingsPlazaMember |  |  |
Accumulated Depreciation | 3,288,000 us-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 | 58,339 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember |  |  |
Initial cost to the Company, Land | 1,612,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember |  |  |
Subsequent cost capitalized | 8,821,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember |  |  |
Gross carrying amount of Land | 1,454,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember |  |  |
Gross carrying amount of building and improvements | 8,979,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 10,433,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MaxatawnyMarketplaceMember |  |  |
Accumulated Depreciation | 383,000 us-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 | 91,518 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember |  |  |
Initial cost to the Company, Land | 1,914,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember |  |  |
Subsequent cost capitalized | 11,407,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember |  |  |
Gross carrying amount of Land | 1,914,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember |  |  |
Gross carrying amount of building and improvements | 11,407,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 13,321,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember |  |  |
Accumulated Depreciation | 2,571,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MeadowsMarketplaceMember |  |  |
Amount of Encumbrance | 9,432,000 us-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 | 51,500 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember |  |  |
Initial cost to the Company, Land | 2,709,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember |  |  |
Initial cost to the Company, Building and Improvements | 12,159,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember |  |  |
Gross carrying amount of Land | 2,709,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember |  |  |
Gross carrying amount of building and improvements | 12,159,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 14,868,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MechanicsburgGiantMember |  |  |
Accumulated Depreciation | 3,136,000 us-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 | 71,896 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember |  |  |
Initial cost to the Company, Land | 3,121,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember |  |  |
Initial cost to the Company, Building and Improvements | 12,341,000 us-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 | 5,250,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember |  |  |
Gross carrying amount of building and improvements | 9,911,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 15,161,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember |  |  |
Accumulated Depreciation | 1,892,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_MetroSquareMember |  |  |
Amount of Encumbrance | 8,005,000 us-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 | 64,489 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember |  |  |
Initial cost to the Company, Land | 1,721,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 7,758,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember |  |  |
Subsequent cost capitalized | 399,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember |  |  |
Gross carrying amount of Land | 1,682,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember |  |  |
Gross carrying amount of building and improvements | 8,196,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 9,878,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewportPlazaMember |  |  |
Accumulated Depreciation | 2,436,000 us-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 | 259,566 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember |  |  |
Initial cost to the Company, Land | 14,891,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember |  |  |
Initial cost to the Company, Building and Improvements | 24,967,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember |  |  |
Subsequent cost capitalized | 1,146,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember |  |  |
Gross carrying amount of Land | 8,807,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember |  |  |
Gross carrying amount of building and improvements | 32,197,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 41,004,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember |  |  |
Accumulated Depreciation | 8,390,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NewLondonMallMember |  |  |
Amount of Encumbrance | 27,291,000 us-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 | 69,136 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember |  |  |
Initial cost to the Company, Land | 3,332,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember |  |  |
Subsequent cost capitalized | 10,012,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember |  |  |
Gross carrying amount of Land | 3,379,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember |  |  |
Gross carrying amount of building and improvements | 9,965,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 13,344,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorthsideCommonsMember |  |  |
Accumulated Depreciation | 1,320,000 us-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 | 102,459 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember |  |  |
Initial cost to the Company, Land | 1,874,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember |  |  |
Initial cost to the Company, Building and Improvements | 8,453,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember |  |  |
Subsequent cost capitalized | 1,640,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember |  |  |
Gross carrying amount of Land | 1,874,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember |  |  |
Gross carrying amount of building and improvements | 10,093,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 11,967,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_NorwoodShoppingCenterMember |  |  |
Accumulated Depreciation | 2,735,000 us-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 | 38,700 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember |  |  |
Initial cost to the Company, Land | 960,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember |  |  |
Initial cost to the Company, Building and Improvements | 4,254,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember |  |  |
Subsequent cost capitalized | 45,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember |  |  |
Gross carrying amount of Land | 960,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember |  |  |
Gross carrying amount of building and improvements | 4,299,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 5,259,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember |  |  |
Accumulated Depreciation | 1,079,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OakRidgeMember |  |  |
Amount of Encumbrance | 3,166,000 us-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 | 90,100 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember |  |  |
Initial cost to the Company, Land | 2,504,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember |  |  |
Initial cost to the Company, Building and Improvements | 15,662,000 us-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 | 2,504,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember |  |  |
Gross carrying amount of building and improvements | 15,429,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 17,933,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandCommonsMember |  |  |
Accumulated Depreciation | 3,739,000 us-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 | 58,224 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember |  |  |
Initial cost to the Company, Land | 1,611,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember |  |  |
Initial cost to the Company, Building and Improvements | 6,292,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember |  |  |
Subsequent cost capitalized | 41,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember |  |  |
Gross carrying amount of Land | 1,611,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember |  |  |
Gross carrying amount of building and improvements | 6,333,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 7,944,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember |  |  |
Accumulated Depreciation | 2,051,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_OaklandMillsMember |  |  |
Amount of Encumbrance | 4,457,000 us-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 | 111,051 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember |  |  |
Initial cost to the Company, Land | 1,488,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember |  |  |
Initial cost to the Company, Building and Improvements | 6,566,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember |  |  |
Subsequent cost capitalized | 1,394,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember |  |  |
Gross carrying amount of Land | 1,488,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember |  |  |
Gross carrying amount of building and improvements | 7,960,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 9,448,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PalmyraShoppingCenterMember |  |  |
Accumulated Depreciation | 2,321,000 us-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 | 86,089 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember |  |  |
Initial cost to the Company, Land | 2,010,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 6,489,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember |  |  |
Subsequent cost capitalized | 476,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember |  |  |
Gross carrying amount of Land | 2,010,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember |  |  |
Gross carrying amount of building and improvements | 6,965,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 8,975,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember |  |  |
Accumulated Depreciation | 1,978,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PineGrovePlazaMember |  |  |
Amount of Encumbrance | 5,197,000 us-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 | 154,908 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember |  |  |
Initial cost to the Company, Land | 2,942,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember |  |  |
Initial cost to the Company, Building and Improvements | 11,769,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember |  |  |
Subsequent cost capitalized | 1,408,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember |  |  |
Gross carrying amount of Land | 2,843,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember |  |  |
Gross carrying amount of building and improvements | 13,276,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 16,119,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PortRichmondVillageMember |  |  |
Accumulated Depreciation | 4,517,000 us-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 | 456,364 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember |  |  |
Initial cost to the Company, Land | 37,031,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 54,210,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember |  |  |
Subsequent cost capitalized | 79,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember |  |  |
Gross carrying amount of Land | 37,031,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember |  |  |
Gross carrying amount of building and improvements | 54,289,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 91,320,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember |  |  |
Accumulated Depreciation | 1,436,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_QuartermasterPlazaMember |  |  |
Amount of Encumbrance | 41,786,000 us-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 | 226,786 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember |  |  |
Initial cost to the Company, Land | 9,718,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember |  |  |
Initial cost to the Company, Building and Improvements | 40,356,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember |  |  |
Subsequent cost capitalized | 4,987,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember |  |  |
Gross carrying amount of Land | 9,718,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember |  |  |
Gross carrying amount of building and improvements | 45,343,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 55,061,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_RiverViewPlazaOneTwoAndThreeMember |  |  |
Accumulated Depreciation | 13,310,000 us-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 | 264,134 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember |  |  |
Initial cost to the Company, Land | 14,849,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 18,445,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember |  |  |
Subsequent cost capitalized | 1,947,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember |  |  |
Gross carrying amount of Land | 13,406,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember |  |  |
Gross carrying amount of building and improvements | 21,835,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 35,241,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember |  |  |
Accumulated Depreciation | 7,638,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SanSouciPlazaMember |  |  |
Amount of Encumbrance | 27,200,000 us-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 | 283,415 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember |  |  |
Initial cost to the Company, Land | 8,222,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember |  |  |
Initial cost to the Company, Building and Improvements | 36,314,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember |  |  |
Subsequent cost capitalized | 2,779,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember |  |  |
Gross carrying amount of Land | 8,222,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember |  |  |
Gross carrying amount of building and improvements | 39,093,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 47,315,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthPhiladelphiaMember |  |  |
Accumulated Depreciation | 13,469,000 us-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 | 155,842 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember |  |  |
Initial cost to the Company, Building and Improvements | 11,834,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember |  |  |
Subsequent cost capitalized | 193,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember |  |  |
Gross carrying amount of building and improvements | 12,027,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 12,027,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember |  |  |
Accumulated Depreciation | 3,411,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SouthingtonShoppingCenterMember |  |  |
Amount of Encumbrance | 5,209,000 us-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 | 67,216 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember |  |  |
Initial cost to the Company, Land | 1,402,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 7,236,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember |  |  |
Subsequent cost capitalized | 23,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember |  |  |
Gross carrying amount of Land | 1,402,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember |  |  |
Gross carrying amount of building and improvements | 7,259,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 8,661,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SuffolkPlazaMember |  |  |
Accumulated Depreciation | 2,720,000 us-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 | 100,816 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember |  |  |
Initial cost to the Company, Land | 2,268,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember |  |  |
Initial cost to the Company, Building and Improvements | 6,232,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember |  |  |
Subsequent cost capitalized | 5,701,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember |  |  |
Gross carrying amount of Land | 2,272,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember |  |  |
Gross carrying amount of building and improvements | 11,929,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 14,201,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember |  |  |
Accumulated Depreciation | 4,281,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_SwedeSquareMember |  |  |
Amount of Encumbrance | 9,999,000 us-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 | 227,193 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember |  |  |
Initial cost to the Company, Land | 7,632,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember |  |  |
Initial cost to the Company, Building and Improvements | 29,308,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember |  |  |
Subsequent cost capitalized | 1,576,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember |  |  |
Gross carrying amount of Land | 7,648,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember |  |  |
Gross carrying amount of building and improvements | 30,868,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 38,516,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_BrickyardMember |  |  |
Accumulated Depreciation | 8,317,000 us-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 | 203,426 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember |  |  |
Initial cost to the Company, Land | 3,098,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember |  |  |
Initial cost to the Company, Building and Improvements | 14,047,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember |  |  |
Subsequent cost capitalized | 2,934,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember |  |  |
Gross carrying amount of Land | 3,098,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember |  |  |
Gross carrying amount of building and improvements | 16,981,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 20,079,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_CommonsMember |  |  |
Accumulated Depreciation | 5,383,000 us-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 | 268,037 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember |  |  |
Initial cost to the Company, Land | 2,700,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember |  |  |
Initial cost to the Company, Building and Improvements | 10,800,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember |  |  |
Subsequent cost capitalized | 14,670,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember |  |  |
Gross carrying amount of Land | 2,996,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember |  |  |
Gross carrying amount of building and improvements | 25,174,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 28,170,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember |  |  |
Accumulated Depreciation | 7,905,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_PointMember |  |  |
Amount of Encumbrance | 29,001,000 us-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 | 121,320 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember |  |  |
Initial cost to the Company, Land | 7,580,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember |  |  |
Initial cost to the Company, Building and Improvements | 11,089,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember |  |  |
Subsequent cost capitalized | 9,439,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember |  |  |
Gross carrying amount of Land | 7,580,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember |  |  |
Gross carrying amount of building and improvements | 20,528,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 28,108,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ShopsAtSuffolkDownsMember |  |  |
Accumulated Depreciation | 4,326,000 us-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 | 183,775 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember |  |  |
Initial cost to the Company, Land | 3,412,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 19,240,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember |  |  |
Subsequent cost capitalized | 1,343,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember |  |  |
Gross carrying amount of Land | 3,368,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember |  |  |
Gross carrying amount of building and improvements | 20,627,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 23,995,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TimpanyPlazaMember |  |  |
Accumulated Depreciation | 4,545,000 us-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 | 339,279 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember |  |  |
Initial cost to the Company, Land | 6,932,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember |  |  |
Initial cost to the Company, Building and Improvements | 32,815,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember |  |  |
Subsequent cost capitalized | 6,312,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember |  |  |
Gross carrying amount of Land | 6,932,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember |  |  |
Gross carrying amount of building and improvements | 39,127,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 46,059,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlerMallMember |  |  |
Accumulated Depreciation | 9,808,000 us-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 | 313,929 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember |  |  |
Initial cost to the Company, Land | 13,349,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 23,867,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember |  |  |
Subsequent cost capitalized | 25,177,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember |  |  |
Gross carrying amount of Land | 13,351,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember |  |  |
Gross carrying amount of building and improvements | 49,042,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 62,393,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_TrexlertownPlazaMember |  |  |
Accumulated Depreciation | 7,266,000 us-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 | 394,598 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember |  |  |
Initial cost to the Company, Land | 28,187,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember |  |  |
Subsequent cost capitalized | 66,757,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember |  |  |
Gross carrying amount of Land | 25,783,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember |  |  |
Gross carrying amount of building and improvements | 69,161,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 94,944,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_UplandSquareMember |  |  |
Accumulated Depreciation | 9,331,000 us-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 | 190,939 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember |  |  |
Initial cost to the Company, Land | 1,950,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 7,766,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember |  |  |
Subsequent cost capitalized | 1,102,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember |  |  |
Gross carrying amount of Land | 1,950,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember |  |  |
Gross carrying amount of building and improvements | 8,868,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 10,818,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_ValleyPlazaMember |  |  |
Accumulated Depreciation | 2,709,000 us-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 | 157,394 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember |  |  |
Initial cost to the Company, Land | 2,061,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember |  |  |
Initial cost to the Company, Building and Improvements | 7,314,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember |  |  |
Subsequent cost capitalized | 4,056,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember |  |  |
Gross carrying amount of Land | 2,000,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember |  |  |
Gross carrying amount of building and improvements | 11,431,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 13,431,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WashingtonCenterShoppesMember |  |  |
Accumulated Depreciation | 4,114,000 us-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 | 101,824 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember |  |  |
Initial cost to the Company, Land | 3,551,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 18,412,000 us-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 | 4,082,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember |  |  |
Gross carrying amount of building and improvements | 17,670,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 21,752,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WebsterPlazaMember |  |  |
Accumulated Depreciation | 3,948,000 us-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 | 133,039 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember |  |  |
Initial cost to the Company, Land | 2,823,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 14,901,000 us-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 | 2,596,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember |  |  |
Gross carrying amount of building and improvements | 14,319,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 16,915,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember |  |  |
Accumulated Depreciation | 3,336,000 us-gaap_RealEstateAccumulatedDepreciation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_WestBridgewaterPlazaMember |  |  |
Amount of Encumbrance | 10,255,000 us-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 | 158,982 cdr_GrossLeasableArea / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember |  |  |
Initial cost to the Company, Land | 5,940,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember |  |  |
Initial cost to the Company, Building and Improvements | 25,505,000 us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember |  |  |
Subsequent cost capitalized | 451,000 us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember |  |  |
Gross carrying amount of Land | 5,799,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember |  |  |
Gross carrying amount of building and improvements | 26,097,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 31,896,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_YorktownePlazaMember |  |  |
Accumulated Depreciation | 6,511,000 us-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 | 1,965,000 us-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 | 881,000 us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_LandParcelsMember |  |  |
SEC Schedule III, Real Estate, Gross, Total | 881,000 us-gaap_RealEstateGrossAtCarryingValue / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = cdr_LandParcelsMember |  |  |

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