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

Represents the amount of reimbursements paid to the acquiree in connection with a business combination.

+ References

No definition available.

+ Details

Name:	kim_BusinessCombinationReimbursementsPaidToAcquiree
Namespace Prefix:	kim_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the number of properties acquired.

+ References

No definition available.

+ Details

Name:	kim_NumberOfPropertiesAcquired
Namespace Prefix:	kim_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Of the number of properties acquired, this element represents the number held through joint venture programs.

+ References

No definition available.

+ Details

Name:	kim_PropertiesAcquiredNumberHeldThroughJointVenturePrograms
Namespace Prefix:	kim_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

No definition available.

+ Details

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

- 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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
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+ Details

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

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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- Details

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Note 3 - Weingarten Merger (Details Textual) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Aug. 03, 2021 USD ($) $ / shares shares	Jul. 15, 2021 shares	Apr. 15, 2021 shares	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total				$ 104,000		$ 104,000
Business Combination, Acquisition Related Costs				46,998	$ (0)	50,191	$ (0)
Weingarten Realty Investors [Member]
Business Combination, Consideration Transferred, Total	$ 4,059,159
Payments to Acquire Businesses, Gross	$ 281,100
Business Acquisition, Share Price (in dollars per share) \| $ / shares	$ 20.78
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Per Each Acquired Company Share (in shares) \| shares	1.408	1.408	1.408
Business Combination, Reimbursements Paid to Acquiree	$ 39,100
Number of Properties Acquired	149
Properties Acquired, Number Held Through Joint Venture Programs	30
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net, Total	$ 4,100,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual						73,500
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual						(9,900)
Business Combination, Acquisition Related Costs				$ 47,000		$ 50,200