The number of shares issued or issuable per each acquired company share in the business acquisition.

No definition available.

Name:	kim_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesPerEachAcquiredCompanyShare
Namespace Prefix:	kim_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash outflow per each acquired company share associated with the acquisition of business during the period.

+ References

No definition available.

+ Details

Name:	kim_BusinessCombinationConsiderationTransferredCashPerEachAcquiredCompanyShare
Namespace Prefix:	kim_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460

+ Details

Name:	us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Date the declared dividend will be paid, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

+ Details

Name:	us-gaap_DividendsPayableAmountPerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsPayableDateOfRecordDayMonthAndYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=kim_WeingartenRealtyInvestorsMember
Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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

Note 1 - Business and Organization (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Aug. 03, 2021	Jul. 15, 2021	Apr. 15, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Combination, Acquisition Related Costs				$ 46,998	$ (0)	$ 50,191	$ (0)
Weingarten Realty Investors [Member]
Dividends Payable, Amount Per Share (in dollars per share)		$ 0.69
Dividends Payable, Date to be Paid		Aug. 02, 2021
Dividends Payable, Date of Record		Jul. 28, 2021
Weingarten Realty Investors [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Per Each Acquired Company Share (in shares)	1.408	1.408	1.408
Business Combination, Consideration Transferred, Cash Per Each Acquired Company Share (in dollars per share)		$ 2.20	$ 2.89
Business Combination, Acquisition Related Costs				$ 47,000		$ 50,200