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Note 11 - Fair Value Measurements (Details) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Note 11 - Fair Value Measurements (Details) [Line Items]      
Marketable Securities $ 105,253,000us-gaap_MarketableSecurities [1]   $ 90,235,000us-gaap_MarketableSecurities [1]
Asset Impairment Charges 6,473,000us-gaap_AssetImpairmentCharges 6,893,000us-gaap_AssetImpairmentCharges  
Impairment of Real Estate 600,000us-gaap_ImpairmentOfRealEstate    
Fair Value, Estimate Not Practicable, Carrying (Reported) Amount [Member]      
Note 11 - Fair Value Measurements (Details) [Line Items]      
Impairment of Real Estate   6,800,000us-gaap_ImpairmentOfRealEstate
/ us-gaap_FairValueEstimateNotPracticableDisclosureItemsAxis
= us-gaap_FairValueEstimateNotPracticableCarryingReportedAmountMember		  
Discontinued Operations [Member]      
Note 11 - Fair Value Measurements (Details) [Line Items]      
Asset Impairment Charges 100,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentDiscontinuedOperationsMember		 6,700,000us-gaap_AssetImpairmentCharges
/ us-gaap_StatementOperatingActivitiesSegmentAxis
= us-gaap_SegmentDiscontinuedOperationsMember		  
Other Real Estate Investments [Member]      
Note 11 - Fair Value Measurements (Details) [Line Items]      
Asset Impairment Charges   100,000us-gaap_AssetImpairmentCharges
/ us-gaap_FairValueByAssetClassAxis
= kim_OtherRealEstateInvestmentsMember		  
Fair Value, Inputs, Level 1 [Member]      
Note 11 - Fair Value Measurements (Details) [Line Items]      
Marketable Securities 102,700,000us-gaap_MarketableSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member		   87,700,000us-gaap_MarketableSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 3 [Member]      
Note 11 - Fair Value Measurements (Details) [Line Items]      
Marketable Securities $ 2,400,000us-gaap_MarketableSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		   $ 2,300,000us-gaap_MarketableSecurities
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
[1] As of March 31, 2015 and December 31, 2014, the Company determined that $102.7 million and $87.7 million, respectively, of the Marketable securities estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $2.4 million and $2.3 million, respectively, were classified within Level 3 of the fair value hierarchy.