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Organization (Details) ft² in Millions	6 Months Ended
	Jun. 30, 2020 ft² property	Jun. 30, 2019 property
Organization [Line Items]
Number of real estate properties (in properties)		0
Area of real estate property | ft²	17.6
Operating and Redevelopment Properties
Organization [Line Items]
Number of real estate properties (in properties)	90
Under Construction Retail Development Project
Organization [Line Items]
Number of real estate properties (in properties)	2
General Partner Units
Organization [Line Items]
Ownership interest of General Partner (as percent)	97.40%
KRG, LP
Organization [Line Items]
Ownership interest of Common Partner (as percent)	2.60%

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Area of a real estate property.

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

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Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

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

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