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Note 3 - Property Acquisitions, Developments and Other Investments (Details) (USD $)
 1 Months Ended 12 Months Ended 3 Months Ended
Aug. 31, 2010
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2014
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Proceeds from Delayed Tax Exempt Exchange (in Dollars)   $ 126,800,000us-gaap_ProceedsFromDelayedTaxExemptExchange      
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)   107,235,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain 21,711,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain 15,555,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain  
Redeemable Noncontrolling Interest, Equity, Fair Value (in Dollars)   4,900,000us-gaap_RedeemableNoncontrollingInterestEquityFairValue     4,900,000us-gaap_RedeemableNoncontrollingInterestEquityFairValue
Repayments of Secured Debt (in Dollars) 150,000,000us-gaap_RepaymentsOfSecuredDebt        
Business Acquisition, Percentage of Voting Interests Acquired   65.40%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired     65.40%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Number of Joint Ventures   3kim_NumberOfJointVentures 4kim_NumberOfJointVentures   3kim_NumberOfJointVentures
Payments to Acquire Additional Interest in Subsidiaries (in Dollars)   1,100,000us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries 9,400,000us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries    
Noncontrolling Interest, Period Increase (Decrease) (in Dollars)   17,650,000us-gaap_MinorityInterestPeriodIncreaseDecrease      
Adjustments to Additional Paid in Capital, Other (in Dollars)   300,000us-gaap_AdjustmentsToAdditionalPaidInCapitalOther 8,200,000us-gaap_AdjustmentsToAdditionalPaidInCapitalOther    
Payments to Acquire Businesses, Gross (in Dollars)   510,052,000us-gaap_PaymentsToAcquireBusinessesGross [1] 367,752,000us-gaap_PaymentsToAcquireBusinessesGross    
Gross Leasable Area   7,104kim_GrossLeasableArea [2] 4,057kim_GrossLeasableArea [2]   7,104kim_GrossLeasableArea [2]
Acquisitions [Member] | Santee Trolley Square [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Equity Method Investment, Ownership Percentage     45.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_SanteeTrolleySquareMember
/ kim_DisclosureAxis
= kim_AcquisitionsMember		    
Acquisitions [Member] | Shops at Kildeer [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Equity Method Investment, Ownership Percentage     19.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_ShopsAtKildeerMember
/ kim_DisclosureAxis
= kim_AcquisitionsMember		    
Acquisitions [Member] | Putty Hill Plaza [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Equity Method Investment, Ownership Percentage     20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_PuttyHillPlazaMember
/ kim_DisclosureAxis
= kim_AcquisitionsMember		    
Business Acquisition, Percentage of Voting Interests Acquired     80.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= kim_PuttyHillPlazaMember
/ kim_DisclosureAxis
= kim_AcquisitionsMember		    
Sold [Member] | Encumbered [Member] | KIF 1 Portfolio [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   1,000,000us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= kim_EncumberedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= kim_SoldMember		     1,000,000us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= kim_EncumberedMember
/ us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis
= kim_SoldMember
Encumbered [Member] | KIF 1 Portfolio [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   12us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= kim_EncumberedMember		     12us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= kim_EncumberedMember
Properties Divided [Member] | BIG Portfolios [Member] | Corporate Joint Venture [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   21us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= us-gaap_CorporateJointVentureMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember
/ us-gaap_StatementScenarioAxis
= kim_PropertiesDividedMember		     21us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= us-gaap_CorporateJointVentureMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember
/ us-gaap_StatementScenarioAxis
= kim_PropertiesDividedMember
Convertible Debt [Member] | Wilton River Park Shopping Ctr [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount (in Dollars)     5,200,000us-gaap_RedeemableNoncontrollingInterestEquityCommonCarryingAmount
/ us-gaap_BusinessAcquisitionAxis
= kim_WiltonRiverParkShoppingCtrMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember		    
Convertible Debt [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Debt Instrument Convertible Term     1 year    
Debt Instrument, Interest Rate, Stated Percentage     6.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember		    
BIG Portfolios [Member] | Corporate Joint Venture [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   15us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= us-gaap_CorporateJointVentureMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember		     15us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= us-gaap_CorporateJointVentureMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember
BIG Portfolios [Member] | BIG Shopping Centers [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   8us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= kim_BIGShoppingCentersMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember		     8us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= kim_BIGShoppingCentersMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember
Noncontrolling Interest, Ownership Percentage by Parent   99.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= kim_BIGShoppingCentersMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember		     99.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ dei_LegalEntityAxis
= kim_BIGShoppingCentersMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember
BIG Portfolios [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   7us-gaap_NumberOfRealEstateProperties
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember		     7us-gaap_NumberOfRealEstateProperties
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)   19,500,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember		      
Noncontrolling Interest, Ownership Percentage by Parent   99.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember		     99.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_BIGPortfoliosMember
Canyon Square Plaza [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners     15.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_CanyonSquarePlazaMember		    
JTS Properties [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Loss (in Dollars)     9,600,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementLoss
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_JTSPropertiesMember		    
Repayments of Debt (in Dollars)     43,300,000us-gaap_RepaymentsOfDebt
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= kim_JTSPropertiesMember		    
LaSalle Properties [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   3us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_LaSallePropertiesMember		     3us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_LaSallePropertiesMember
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   11.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= kim_LaSallePropertiesMember		     11.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= kim_LaSallePropertiesMember
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)   3,700,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= kim_LaSallePropertiesMember		      
Payments to Acquire Businesses, Gross (in Dollars)   62,239,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_LaSallePropertiesMember		 [1],[3]      
Gross Leasable Area   316kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_LaSallePropertiesMember		 [2],[3]     316kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_LaSallePropertiesMember		 [2],[3]
Quail Corners [Member] | Seller [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   34.60%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember
/ dei_LegalEntityAxis
= kim_SellerMember		     34.60%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember
/ dei_LegalEntityAxis
= kim_SellerMember
Quail Corners [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Noncontrolling Interest, Ownership Percentage by Parent   65.40%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember		     65.40%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember
Redeemable Noncontrolling Interest, Equity, Fair Value (in Dollars)   4,900,000us-gaap_RedeemableNoncontrollingInterestEquityFairValue
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember		     4,900,000us-gaap_RedeemableNoncontrollingInterestEquityFairValue
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember
Payments to Acquire Businesses, Gross (in Dollars)   9,398,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember		 [1],[4]      
Gross Leasable Area   110kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember		 [2],[4]     110kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_QuailCornersMember		 [2],[4]
KIF 1 Portfolio [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)   65,600,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember		      
Equity Method Investment, Ownership Percentage   39.10%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember		     39.10%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember
Repayments of Secured Debt (in Dollars)   128,400,000us-gaap_RepaymentsOfSecuredDebt
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember		      
Payments to Acquire Businesses, Gross (in Dollars)   128,699,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember		 [1],[5]      
Gross Leasable Area   1,589kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember		 [2],[5]     1,589kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_KIF1PortfolioMember		 [2],[5]
SEB Portfolio [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   10us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_SEBPortfolioMember		     10us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_SEBPortfolioMember
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   15.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= kim_SEBPortfolioMember		     15.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= kim_SEBPortfolioMember
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)   14,400,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= kim_SEBPortfolioMember		      
Payments to Acquire Businesses, Gross (in Dollars)   69,261,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_SEBPortfolioMember		 [1],[6]      
Gross Leasable Area   1,415kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_SEBPortfolioMember		 [2],[6]     1,415kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_SEBPortfolioMember		 [2],[6]
North Quincy Plaza [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   11.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= kim_NorthQuincyPlazaMember		     11.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ us-gaap_BusinessAcquisitionAxis
= kim_NorthQuincyPlazaMember
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)   2,200,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= kim_NorthQuincyPlazaMember		      
Payments to Acquire Businesses, Gross (in Dollars)   20,470,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_NorthQuincyPlazaMember		 [1],[7]      
Gross Leasable Area   81kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_NorthQuincyPlazaMember		 [2],[7]     81kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_NorthQuincyPlazaMember		 [2],[7]
Belmart Plaza [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)   1,700,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= kim_BelmartPlazaMember		      
Noncontrolling Interest, Ownership Percentage by Parent   74.80%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= kim_BelmartPlazaMember		     74.80%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_BusinessAcquisitionAxis
= kim_BelmartPlazaMember
Equity Method Investment, Ownership Percentage   21.50%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_BelmartPlazaMember		     21.50%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_BelmartPlazaMember
Payments to Acquire Businesses, Gross (in Dollars)   3,208,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_BelmartPlazaMember		 [1],[8]      
Gross Leasable Area   77kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_BelmartPlazaMember		 [2],[8]     77kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_BelmartPlazaMember		 [2],[8]
Santee Trolley Square [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)     22,700,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= kim_SanteeTrolleySquareMember		    
Payments to Acquire Businesses, Gross (in Dollars)     26,863,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_SanteeTrolleySquareMember		 [9]    
Gross Leasable Area     311kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_SanteeTrolleySquareMember		 [2],[9]    
Shops at Kildeer [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Payments to Acquire Businesses, Gross (in Dollars)        [10]    
Gross Leasable Area     168kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_ShopsAtKildeerMember		 [10],[2]    
Putty Hill Plaza [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)     500,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= kim_PuttyHillPlazaMember		    
Payments to Acquire Businesses, Gross (in Dollars)     4,592,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_PuttyHillPlazaMember		 [11]    
Gross Leasable Area     91kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_PuttyHillPlazaMember		 [11],[2]    
Wilton River Park Shopping Ctr [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage     6.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_WiltonRiverParkShoppingCtrMember		    
Loans Receivable, Net (in Dollars)     5,200,000us-gaap_LoansReceivableNet
/ us-gaap_BusinessAcquisitionAxis
= kim_WiltonRiverParkShoppingCtrMember		    
Payments to Acquire Businesses, Gross (in Dollars)     777,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_WiltonRiverParkShoppingCtrMember		 [12]    
Gross Leasable Area     187kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_WiltonRiverParkShoppingCtrMember		 [12],[2]    
Factoria Mall [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars)     8,200,000us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
/ us-gaap_BusinessAcquisitionAxis
= kim_FactoriaMallMember		    
Equity Method Investment, Ownership Percentage     50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_FactoriaMallMember		    
Business Acquisition, Percentage of Voting Interests Acquired     49.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= kim_FactoriaMallMember		    
Payments to Acquire Businesses, Gross (in Dollars)     37,283,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_FactoriaMallMember		 [13]    
Gross Leasable Area     510kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_FactoriaMallMember		 [13],[2]    
Remaining Interest In Joint Ventures [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Noncontrolling Interest, Period Increase (Decrease) (in Dollars)   800,000us-gaap_MinorityInterestPeriodIncreaseDecrease
/ us-gaap_BusinessAcquisitionAxis
= kim_RemainingInterestInJointVenturesMember		 400,000us-gaap_MinorityInterestPeriodIncreaseDecrease
/ us-gaap_BusinessAcquisitionAxis
= kim_RemainingInterestInJointVenturesMember		    
Land Parcels [Member] | Dania, Florida [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Payments to Acquire Businesses, Gross (in Dollars)         62,800,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_LandParcelsMember
/ us-gaap_StatementGeographicalAxis
= kim_DaniaFloridaMember
Land Parcels [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   3,000,000us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_LandParcelsMember		     3,000,000us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= kim_LandParcelsMember
Payments to Acquire Businesses, Gross (in Dollars)   53,500,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_LandParcelsMember		      
Gross Leasable Area   900,000kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_LandParcelsMember		     900,000kim_GrossLeasableArea
/ us-gaap_BusinessAcquisitionAxis
= kim_LandParcelsMember
Retail Land Sales, Estimated Cost of Major Improvements (in Dollars)   192,800,000us-gaap_RetailLandSalesEstimatedCostOfMajorImprovements
/ us-gaap_BusinessAcquisitionAxis
= kim_LandParcelsMember		      
FNC Realty Corporation [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Noncontrolling Interest, Period Increase (Decrease) (in Dollars)     19,700,000us-gaap_MinorityInterestPeriodIncreaseDecrease
/ us-gaap_BusinessAcquisitionAxis
= kim_FNCRealtyCorporationMember		    
Adjustments to Additional Paid in Capital, Other (in Dollars)     (700,000)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther
/ us-gaap_BusinessAcquisitionAxis
= kim_FNCRealtyCorporationMember		    
Payments to Acquire Businesses, Gross (in Dollars)     $ 20,400,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= kim_FNCRealtyCorporationMember		    
Additional Interest Acquired Percentage     17.30%kim_AdditionalInterestAcquiredPercentage
/ us-gaap_BusinessAcquisitionAxis
= kim_FNCRealtyCorporationMember		    
Ground Up Developments [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Number of Real Estate Properties   4us-gaap_NumberOfRealEstateProperties
/ us-gaap_RealEstatePropertiesAxis
= kim_GroundUpDevelopmentsMember		     4us-gaap_NumberOfRealEstateProperties
/ us-gaap_RealEstatePropertiesAxis
= kim_GroundUpDevelopmentsMember
Seller [Member]          
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items]          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   34.60%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= kim_SellerMember		     34.60%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= kim_SellerMember
[1] Includes 1031 sales proceeds of $126.8 million
[2] Gross leasable area ("GLA")
[3] The Company acquired three properties from a joint venture in which the Company had an 11% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as such recognized a gain of $3.7 million from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.
[4] The Company acquired a 65.4% controlling ownership interest in this property and the seller retained a 34.6% noncontrolling interest in the property. The partner has the ability to put its partnership interest to the Company. As such, the Company has recorded the partners' share of the property's fair value of $4.9 million as Redeemable noncontrolling interests on the Company's Consolidated Balance Sheets.
[5] The Company acquired from its partners the remaining ownership interest in a joint venture which holds 12 encumbered properties for which the Company had a 39.1% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as a result, recognized a gain of $65.6 million from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other. Subsequently, the Company repaid $128.4 million in debt encumbering ten of the properties. Additionally, during June 2014, the Company sold one of the properties to a third party, which approximated its carrying value.
[6] The Company acquired from its partner the remaining ownership interest in 10 properties that were held in a joint venture in which the Company has a 15% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as a result, recognized a gain of $14.4 million from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.
[7] The Company acquired from its partners the remaining ownership interest in this property that was held in a joint venture in which the Company had an 11% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as a result, recognized a gain of $2.2 million from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.
[8] The Company increased its ownership interest to 74.8% in this property that was held in a joint venture in which the Company had a 21.5% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as a result, recognized a gain of $1.7 million from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.
[9] This property was acquired from a joint venture in which the Company had a 45% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as such recognized a gain of $22.7 million, before income tax, from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.
[10] This property was acquired from a joint venture in which the Company had a 19% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance. This transaction resulted in a change in control with no gain or loss recognized.
[11] The Company acquired the remaining 80% interest in an operating property from an unconsolidated joint venture in which the Company had a 20% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as such recognized a gain of $0.5 million from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.
[12] The acquisition of this property included the issuance of $5.2 million of redeemable units, which are redeemable at the option of the holder after one year and earn a yield of 6% per annum, which is included in the purchase price above in Other. In connection with this transaction, the Company provided the sellers a $5.2 million loan at a rate of 6.5%, which is secured by the redeemable units.
[13] The Company acquired an additional 49% interest in this operating property from an unconsolidated joint venture in which the Company had a 50% noncontrolling interest. As such the Company now consolidates this investment. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as a result, recognized a gain of $8.2 million from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.