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Note 3 - Property Acquisitions, Developments and Other Investments (Details) (USD $) | 1 Months Ended | 12 Months Ended | 3 Months Ended
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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) |  | $ 126,800,000 us-gaap_ProceedsFromDelayedTaxExemptExchange |  |  |  |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars) |  | 107,235,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain |  | 21,711,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain |  | 15,555,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain |  |
Redeemable Noncontrolling Interest, Equity, Fair Value (in Dollars) |  | 4,900,000 us-gaap_RedeemableNoncontrollingInterestEquityFairValue |  |  |  |  | 4,900,000 us-gaap_RedeemableNoncontrollingInterestEquityFairValue |
Repayments of Secured Debt (in Dollars) | 150,000,000 us-gaap_RepaymentsOfSecuredDebt |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 65.40%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired |  |  |  |  | 65.40%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired |
Number of Joint Ventures |  | 3 kim_NumberOfJointVentures |  | 4 kim_NumberOfJointVentures |  |  | 3 kim_NumberOfJointVentures |
Payments to Acquire Additional Interest in Subsidiaries (in Dollars) |  | 1,100,000 us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries |  | 9,400,000 us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries |  |  |  |
Noncontrolling Interest, Period Increase (Decrease) (in Dollars) |  | 17,650,000 us-gaap_MinorityInterestPeriodIncreaseDecrease |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Other (in Dollars) |  | 300,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalOther |  | 8,200,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalOther |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  | 510,052,000 us-gaap_PaymentsToAcquireBusinessesGross | [1] | 367,752,000 us-gaap_PaymentsToAcquireBusinessesGross |  |  |  |
Gross Leasable Area |  | 7,104 kim_GrossLeasableArea | [2] | 4,057 kim_GrossLeasableArea | [2] |  | 7,104 kim_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 |  | 1,000,000 us-gaap_NumberOfRealEstateProperties / us-gaap_BusinessAcquisitionAxis = kim_KIF1PortfolioMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = kim_EncumberedMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = kim_SoldMember |  |  |  |  | 1,000,000 us-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 |  | 12 us-gaap_NumberOfRealEstateProperties / us-gaap_BusinessAcquisitionAxis = kim_KIF1PortfolioMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = kim_EncumberedMember |  |  |  |  | 12 us-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 |  | 21 us-gaap_NumberOfRealEstateProperties / dei_LegalEntityAxis = us-gaap_CorporateJointVentureMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = kim_BIGPortfoliosMember / us-gaap_StatementScenarioAxis = kim_PropertiesDividedMember |  |  |  |  | 21 us-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) |  |  |  | 5,200,000 us-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 |  | 15 us-gaap_NumberOfRealEstateProperties / dei_LegalEntityAxis = us-gaap_CorporateJointVentureMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = kim_BIGPortfoliosMember |  |  |  |  | 15 us-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 |  | 8 us-gaap_NumberOfRealEstateProperties / dei_LegalEntityAxis = kim_BIGShoppingCentersMember / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = kim_BIGPortfoliosMember |  |  |  |  | 8 us-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 |  | 7 us-gaap_NumberOfRealEstateProperties / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = kim_BIGPortfoliosMember |  |  |  |  | 7 us-gaap_NumberOfRealEstateProperties / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = kim_BIGPortfoliosMember |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (in Dollars) |  | 19,500,000 us-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) |  |  |  | 9,600,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementLoss / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = kim_JTSPropertiesMember |  |  |  |
Repayments of Debt (in Dollars) |  |  |  | 43,300,000 us-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 |  | 3 us-gaap_NumberOfRealEstateProperties / us-gaap_BusinessAcquisitionAxis = kim_LaSallePropertiesMember |  |  |  |  | 3 us-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) |  | 3,700,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / us-gaap_BusinessAcquisitionAxis = kim_LaSallePropertiesMember |  |  |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  | 62,239,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_LaSallePropertiesMember | [1],[3] |  |  |  |  |
Gross Leasable Area |  | 316 kim_GrossLeasableArea / us-gaap_BusinessAcquisitionAxis = kim_LaSallePropertiesMember | [2],[3] |  |  |  | 316 kim_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) |  | 4,900,000 us-gaap_RedeemableNoncontrollingInterestEquityFairValue / us-gaap_BusinessAcquisitionAxis = kim_QuailCornersMember |  |  |  |  | 4,900,000 us-gaap_RedeemableNoncontrollingInterestEquityFairValue / us-gaap_BusinessAcquisitionAxis = kim_QuailCornersMember |
Payments to Acquire Businesses, Gross (in Dollars) |  | 9,398,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_QuailCornersMember | [1],[4] |  |  |  |  |
Gross Leasable Area |  | 110 kim_GrossLeasableArea / us-gaap_BusinessAcquisitionAxis = kim_QuailCornersMember | [2],[4] |  |  |  | 110 kim_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) |  | 65,600,000 us-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) |  | 128,400,000 us-gaap_RepaymentsOfSecuredDebt / us-gaap_BusinessAcquisitionAxis = kim_KIF1PortfolioMember |  |  |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  | 128,699,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_KIF1PortfolioMember | [1],[5] |  |  |  |  |
Gross Leasable Area |  | 1,589 kim_GrossLeasableArea / us-gaap_BusinessAcquisitionAxis = kim_KIF1PortfolioMember | [2],[5] |  |  |  | 1,589 kim_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 |  | 10 us-gaap_NumberOfRealEstateProperties / us-gaap_BusinessAcquisitionAxis = kim_SEBPortfolioMember |  |  |  |  | 10 us-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) |  | 14,400,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / us-gaap_BusinessAcquisitionAxis = kim_SEBPortfolioMember |  |  |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  | 69,261,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_SEBPortfolioMember | [1],[6] |  |  |  |  |
Gross Leasable Area |  | 1,415 kim_GrossLeasableArea / us-gaap_BusinessAcquisitionAxis = kim_SEBPortfolioMember | [2],[6] |  |  |  | 1,415 kim_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) |  | 2,200,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / us-gaap_BusinessAcquisitionAxis = kim_NorthQuincyPlazaMember |  |  |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  | 20,470,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_NorthQuincyPlazaMember | [1],[7] |  |  |  |  |
Gross Leasable Area |  | 81 kim_GrossLeasableArea / us-gaap_BusinessAcquisitionAxis = kim_NorthQuincyPlazaMember | [2],[7] |  |  |  | 81 kim_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) |  | 1,700,000 us-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) |  | 3,208,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_BelmartPlazaMember | [1],[8] |  |  |  |  |
Gross Leasable Area |  | 77 kim_GrossLeasableArea / us-gaap_BusinessAcquisitionAxis = kim_BelmartPlazaMember | [2],[8] |  |  |  | 77 kim_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) |  |  |  | 22,700,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / us-gaap_BusinessAcquisitionAxis = kim_SanteeTrolleySquareMember |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  |  |  | 26,863,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_SanteeTrolleySquareMember | [9] |  |  |
Gross Leasable Area |  |  |  | 311 kim_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 |  |  |  | 168 kim_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) |  |  |  | 500,000 us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain / us-gaap_BusinessAcquisitionAxis = kim_PuttyHillPlazaMember |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  |  |  | 4,592,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_PuttyHillPlazaMember | [11] |  |  |
Gross Leasable Area |  |  |  | 91 kim_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) |  |  |  | 5,200,000 us-gaap_LoansReceivableNet / us-gaap_BusinessAcquisitionAxis = kim_WiltonRiverParkShoppingCtrMember |  |  |  |
Payments to Acquire Businesses, Gross (in Dollars) |  |  |  | 777,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_WiltonRiverParkShoppingCtrMember | [12] |  |  |
Gross Leasable Area |  |  |  | 187 kim_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) |  |  |  | 8,200,000 us-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) |  |  |  | 37,283,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_FactoriaMallMember | [13] |  |  |
Gross Leasable Area |  |  |  | 510 kim_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) |  | 800,000 us-gaap_MinorityInterestPeriodIncreaseDecrease / us-gaap_BusinessAcquisitionAxis = kim_RemainingInterestInJointVenturesMember |  | 400,000 us-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) |  |  |  |  |  |  | 62,800,000 us-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 |  | 3,000,000 us-gaap_NumberOfRealEstateProperties / us-gaap_BusinessAcquisitionAxis = kim_LandParcelsMember |  |  |  |  | 3,000,000 us-gaap_NumberOfRealEstateProperties / us-gaap_BusinessAcquisitionAxis = kim_LandParcelsMember |
Payments to Acquire Businesses, Gross (in Dollars) |  | 53,500,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_LandParcelsMember |  |  |  |  |  |
Gross Leasable Area |  | 900,000 kim_GrossLeasableArea / us-gaap_BusinessAcquisitionAxis = kim_LandParcelsMember |  |  |  |  | 900,000 kim_GrossLeasableArea / us-gaap_BusinessAcquisitionAxis = kim_LandParcelsMember |
Retail Land Sales, Estimated Cost of Major Improvements (in Dollars) |  | 192,800,000 us-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) |  |  |  | 19,700,000 us-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) |  |  |  | $ 20,400,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = kim_FNCRealtyCorporationMember |  |  |  |
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Ground Up Developments [Member] |  |  |  |  |  |  |  |
Note 3 - Property Acquisitions, Developments and Other Investments (Details) [Line Items] |  |  |  |  |  |  |  |
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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.

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