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Note 12 - Other Assets (Details Textual)	Dec. 31, 2020
Performing Financial Instruments [Member]
Number of Loans	8

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

- Details

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