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Note 1 - Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Economic Interest | 100.00%kim_EconomicInterest |  |
Financing Receivable, Past Due, Term | 90 days |  |
Number of Portfolio Segments | 1 kim_NumberOfPortfolioSegments |  |
Capitalized Computer Software, Net (in Dollars) | $ 24,000,000 us-gaap_CapitalizedComputerSoftwareNet | $ 28,200,000 us-gaap_CapitalizedComputerSoftwareNet |
Capitalized Computer Software, Amortization (in Dollars) | 9,200,000 us-gaap_CapitalizedComputerSoftwareAmortization | 7,600,000 us-gaap_CapitalizedComputerSoftwareAmortization | 5,500,000 us-gaap_CapitalizedComputerSoftwareAmortization
Allowance for Doubtful Accounts Receivable (in Dollars) | 10,400,000 us-gaap_AllowanceForDoubtfulAccountsReceivable | 10,800,000 us-gaap_AllowanceForDoubtfulAccountsReceivable |
Unrecoverable Straight-line Rent Receivable (in Dollars) | 22,900,000 kim_UnrecoverableStraightLineRentReceivable | 23,400,000 kim_UnrecoverableStraightLineRentReceivable |
Amount of Ineffectiveness on Net Investment Hedges (in Dollars) | $ 0 us-gaap_AmountOfIneffectivenessOnNetInvestmentHedges | $ 0 us-gaap_AmountOfIneffectivenessOnNetInvestmentHedges | $ 0 us-gaap_AmountOfIneffectivenessOnNetInvestmentHedges
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) | 7,137,120 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 10,950,388 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 11,159,160 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Potential Adjustment [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Number of Years | 1 kim_NumberOfYears / kim_DisclosureAxis = kim_PotentialAdjustmentMember |  |
Construction Completion [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Number of Years | 1 kim_NumberOfYears / kim_DisclosureAxis = kim_ConstructionCompletionMember |  |
After Issuance [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Number of Years | 1 kim_NumberOfYears / kim_DisclosureAxis = kim_AfterIssuanceMember |  |
First Half [Member] | Restricted Stock [Member] | iii [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vested | 50.00%kim_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentVested / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / kim_DisclosureAxis = kim_FirstHalfMember / us-gaap_VestingAxis = kim_iiiMember |  |
Second Half [Member] | Restricted Stock [Member] | iii [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 2 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vested | 50.00%kim_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentVested / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / kim_DisclosureAxis = kim_SecondHalfMember / us-gaap_VestingAxis = kim_iiiMember |  |
Largest [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Number of Tenants | 5 kim_NumberOfTenants / kim_StandardAxis = kim_LargestMember |  |
Building and Building Improvements [Member] | Maximum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 50 years |  |
Building and Building Improvements [Member] | Minimum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |
Prior Plan [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) | 47,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_AwardTypeAxis = kim_PriorPlanMember |  |
The 2010 Plan [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) | 10,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_AwardTypeAxis = kim_The2010PlanMember |  |
Employee Stock Option [Member] | Maximum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |  |
Employee Stock Option [Member] | Minimum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Employee Stock Option [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period | 10 kim_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExpirationPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |
Restricted Stock [Member] | i [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vested | 100.00%kim_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentVested / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_VestingAxis = kim_iMember |  |
Restricted Stock [Member] | ii [Member] | Maximum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |
Restricted Stock [Member] | ii [Member] | Minimum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Restricted Stock [Member] | iii [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Restricted Stock [Member] | iv [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vested | 20.00%kim_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentVested / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_VestingAxis = kim_IVMember |  |
TJX Companies [Member] | Base Rental Revenue [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 3.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = kim_BaseRentalRevenueMember / us-gaap_MajorCustomersAxis = kim_TJXCompaniesMember |  |
The Home Depot [Member] | Base Rental Revenue [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 2.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = kim_BaseRentalRevenueMember / us-gaap_MajorCustomersAxis = kim_TheHomeDepotMember |  |
Wal-Mart [Member] | Base Rental Revenue [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 1.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = kim_BaseRentalRevenueMember / us-gaap_MajorCustomersAxis = kim_WalMartMember |  |
Khol's [Member] | Base Rental Revenue [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 1.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = kim_BaseRentalRevenueMember / us-gaap_MajorCustomersAxis = kim_KholsMember |  |
Bed Bath & Beyond [Member] | Base Rental Revenue [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 1.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = kim_BaseRentalRevenueMember / us-gaap_MajorCustomersAxis = kim_BedBathBeyondMember |  |
Computer Software, Intangible Asset [Member] | Maximum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 5 years |  |
Computer Software, Intangible Asset [Member] | Minimum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 3 years |  |
Maximum [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Base Rental Revenue [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 1.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = kim_BaseRentalRevenueMember |  |
Gross Leasable Area [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Concentration Risk, Percentage | 1.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = kim_GrossLeasableAreaMember |  |

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