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Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
KimPru and KimPru II [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | $ 919.2 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KimPruandKimPruIIMember |  | $ 920.0 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KimPruandKimPruIIMember |
Average Interest Rate | 5.53%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KimPruandKimPruIIMember |  | 5.53%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KimPruandKimPruIIMember |
Average Remaining Term | 20 months 3 days | [1] | 23 months | [1]
KIR [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | 862.6 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KIRMember |  | 860.7 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KIRMember |
Average Interest Rate | 4.92%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KIRMember |  | 5.04%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KIRMember |
Average Remaining Term | 66 months 27 days | [1] | 61 months 27 days | [1]
Kimstone [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable |  |  | 701.3 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KimstoneMember |
Average Interest Rate |  |  | 4.45%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_KimstoneMember |
Average Remaining Term |  |  | 28 months 21 days | [1]
BIG Shopping Centers [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | 144.8 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_BIGShoppingCentersMember |  | 144.6 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_BIGShoppingCentersMember |
Average Interest Rate | 5.51%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_BIGShoppingCentersMember |  | 5.52%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_BIGShoppingCentersMember |
Average Remaining Term | 19 months 3 days | [1] | 22 months | [1]
CPP [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | 111.5 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_CPPMember |  | 112.0 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_CPPMember |
Average Interest Rate | 5.07%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_CPPMember |  | 5.05%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_CPPMember |
Average Remaining Term | 12 months 15 days | [1] | 10 months 3 days | [1]
SEB Immobilien [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | 50.0 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_SEBImmobilienMember |  | 50.0 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_SEBImmobilienMember |
Average Interest Rate | 4.07%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_SEBImmobilienMember |  | 4.06%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_SEBImmobilienMember |
Average Remaining Term | 32 months 21 days | [1] | 35 months 21 days | [1]
Other Institutional Programs [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | 222.6 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_OtherInstitutionalProgramsMember |  | 222.9 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_OtherInstitutionalProgramsMember |
Average Interest Rate | 5.47%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_OtherInstitutionalProgramsMember |  | 5.47%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_OtherInstitutionalProgramsMember |
Average Remaining Term | 17 months 24 days | [1] | 20 months 24 days | [1]
RioCan [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | 545.9 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_RioCanMember |  | 640.5 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_RioCanMember |
Average Interest Rate | 4.23%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_RioCanMember |  | 4.29%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_RioCanMember |
Average Remaining Term | 36 months 27 days | [1] | 39 months 27 days | [1]
Other Joint Venture Programs [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | 888.7 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_OtherJointVentureProgramsMember |  | 921.9 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_OtherJointVentureProgramsMember |
Average Interest Rate | 5.37%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_OtherJointVentureProgramsMember |  | 5.31%us-gaap_DebtWeightedAverageInterestRate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_OtherJointVentureProgramsMember |
Average Remaining Term | 55 months 6 days | [1] | 58 months 18 days | [1]
All Equity Method Investments [Member] |  |  |  |
Note 4 - Investment and Advances in Real Estate Joint Ventures (Details) - Joint Venture Investments Accounted for under the Equity Method - Debt Details [Line Items] |  |  |  |
Mortgages and Notes Payable | $ 3,745.3 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_AllEquityMethodInvestmentsMember |  | $ 4,573.9 us-gaap_NotesAndLoansPayable / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kim_AllEquityMethodInvestmentsMember |
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