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Note 13 - Other Assets (Details Textual) $ in Millions | Dec. 31, 2021 USD ($) | Aug. 03, 2021 USD ($)
--- | --- | ---
Property Held-for-sale, Net Carrying Amount | $ 13.7 |
Number of Loans | 11 |
Performing Financial Instruments [Member] |  |
Number of Loans | 10 |
Nonperforming Financial Instruments [Member] |  |
Number of Loans | 1 |
Weingarten Realty Investors [Member] |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Mortgage Loans Receivable |  | $ 13.4

X
- Definition The amount of mortgage loans receivable recognized as of the acquisition date. + References No definition available. + Details
Name: | kim_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageLoansReceivable
Namespace Prefix: | kim_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of loans. + References No definition available. + Details
Name: | kim_NumberOfLoans
Namespace Prefix: | kim_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the carrying amount, net of accumulated depreciation and amortization, of property classified as held-for-sale. + References No definition available. + Details
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Namespace Prefix: | kim_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_NonperformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=kim_WeingartenRealtyInvestorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |