Note 6 - Variable Interest Entities ("VIE") (Details Textual) $ in Millions	3 Months Ended
Mar. 31, 2017 USD ($)
Variable Interest Entity, Number of Entities	26
Variable Interest Entity, Encumbered by Third Party Non-resource Mortgage Debt [Member]
Variable Interest Entity, Number of Entities	4
Consolidated Operating Properties [Member]
Variable Interest Entity, Number of Entities	23
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 911.5
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	$ 173.7
Real Estate Under Development [Member]
Variable Interest Entity, Number of Entities	3
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 228.3
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	7.7
Variable Interest Entity, Financial or Other Support, Amount	196.5
Redevelopment [Member]
Variable Interest Entity, Financial or Other Support, Amount	7.4
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 7.4

Number of Variable Interest Entities for which the Company is the primary beneficiary.

No definition available.

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- Definition

The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5710-111685

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

+ References

+ Details

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

- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5747-111685

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The amount of financial or other support the reporting entity has provided (explicitly or implicitly) to the Variable Interest Entity (VIE) that it was not previously contractually required to provide or that the reporting entity intends to provide, including, for example, situations in which the reporting entity assisted the VIE in obtaining another type of support.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=77990344&loc=SL6759159-111685

+ Details

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Balance Type:	debit
Period Type:	duration

- Details

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- Details

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Data Type:	na
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Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=kim_RealEstateUnderDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstatePropertiesAxis=kim_RedevelopmentMember
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Data Type:	na
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Period Type: