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Note 2 - Operating Property Activities - Summary of Ownership Interest and Gain on Change of Interest (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 USD ($)
Gain on change in control of interests, net | $ 10,188
Plantation Commons [Member] |
Current ownership interest | 76.25%
Gain on change in control of interests, net | $ 9,793
Gordon Plaza [Member] |
Current ownership interest | 40.62%
Gain on change in control of interests, net | $ 395

X
- Definition Percentage of voting equity interests acquired in a business combination achieved in stages, including equity interests in the acquiree held by the acquirer immediately before the acquisition date and acquired at the acquisition date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition In a business combination achieved in stages, this element represents the amount of net gain (loss) recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=kim_PlantationCommonsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=kim_GordonPlazaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |