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Investment In Cedar/RioCan Joint Venture (Narrative) (Details) (USD $) | 12 Months Ended | 0 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2013 | Oct. 10, 2012 | Dec. 31, 2014 property | Oct. 09, 2012 property
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Number of properties |  |  |  | 59 us-gaap_NumberOfRealEstateProperties |
Gain on exit from unconsolidated joint ventures | $ 30,526,000 cdr_GainLossOnExitFromUnconsolidatedJointVentures |  |  |  |
Cedar/Rio Can Joint Venture [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Percentage of joint venture ownership |  |  |  |  | 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cdr_CedarRioCanJointVentureMember
Number of properties |  |  |  |  | 22 us-gaap_NumberOfRealEstateProperties / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cdr_CedarRioCanJointVentureMember
Management fee revenue | 2,800,000 us-gaap_ManagementFeesRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cdr_CedarRioCanJointVentureMember | 200,000 us-gaap_ManagementFeesRevenue / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cdr_CedarRioCanJointVentureMember |  |  |
Rio Can [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Percentage of joint venture ownership |  |  |  |  | 80.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = cdr_RioCanMember
Franklin Village Plaza [Member] |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Property ownership percentage |  |  | 100.00%cdr_PropertyOwnershipPercentage / us-gaap_RealEstatePropertiesAxis = cdr_FranklinVillagePlazaMember |  |
Purchase price of acquired property |  |  | 75,100,000 cdr_PurchasePriceOfAcquiredProperty / us-gaap_RealEstatePropertiesAxis = cdr_FranklinVillagePlazaMember |  |
Assumption of mortgage financing related to the exchange agreement |  |  | 43,100,000 cdr_EquityMethodInvestmentAssumedMortgageFinancing / us-gaap_RealEstatePropertiesAxis = cdr_FranklinVillagePlazaMember |  |
Cash received in the exchange transaction |  |  | $ 41,600,000 cdr_CashReceivedInExchangeOfJointVentureInterest / us-gaap_RealEstatePropertiesAxis = cdr_FranklinVillagePlazaMember |  |

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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