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Note 4 - Real Estate Under Development (Details Textual) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Payments to Acquire Real Estate, Total	$ 3,337	$ 38,390
Real Estate Under Development, Capitalized Costs of Interest, Real Estate Taxes, Insurance, Legal Costs and Payroll	31,800		$ 27,700
Real Estate Inventory, Capitalized Interest Costs Incurred	3,000
Real Estate Development Projects, Real Estate Taxes and Insurance Capitalized	700
Real Estate Development Projects, Payroll Costs Capitalized	$ 400
Real Estate Under Development [Member]
Number of Real Estate Properties	4
Real Estate Properties, Future Development [Member]
Number of Real Estate Properties	2
Parcel Adjacent to Development Project [Member]
Payments to Acquire Real Estate, Total	$ 4,600

X

- Definition

The amount of payroll costs associated with real estate development projects that has been capitalized.

+ References

No definition available.

+ Details

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Namespace Prefix:	kim_
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X

- Definition

The amount of real estate taxes and insurance from real estate development projects that has been capitalized.

+ References

No definition available.

+ Details

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Namespace Prefix:	kim_
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X

- Definition

Represents capitalized costs of interest, real estate taxes, insurance, legal costs and payroll related to real estate under development.

+ References

No definition available.

+ Details

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Namespace Prefix:	kim_
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X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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X

- Definition

The amount of interest capitalized to an operative builder's inventory during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

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- Details

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