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Note 11 - Fair Value Measurements (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Note 11 - Fair Value Measurements (Details) [Line Items] |  |  |  |  |
Marketable Securities | $ 105,253,000 us-gaap_MarketableSecurities | [1] |  | $ 90,235,000 us-gaap_MarketableSecurities | [1]
Asset Impairment Charges | 6,473,000 us-gaap_AssetImpairmentCharges |  | 6,893,000 us-gaap_AssetImpairmentCharges |  |
Impairment of Real Estate | 600,000 us-gaap_ImpairmentOfRealEstate |  |  |  |
Fair Value, Estimate Not Practicable, Carrying (Reported) Amount [Member] |  |  |  |  |
Note 11 - Fair Value Measurements (Details) [Line Items] |  |  |  |  |
Impairment of Real Estate |  |  | 6,800,000 us-gaap_ImpairmentOfRealEstate / us-gaap_FairValueEstimateNotPracticableDisclosureItemsAxis = us-gaap_FairValueEstimateNotPracticableCarryingReportedAmountMember |  |
Discontinued Operations [Member] |  |  |  |  |
Note 11 - Fair Value Measurements (Details) [Line Items] |  |  |  |  |
Asset Impairment Charges | 100,000 us-gaap_AssetImpairmentCharges / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  | 6,700,000 us-gaap_AssetImpairmentCharges / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |
Other Real Estate Investments [Member] |  |  |  |  |
Note 11 - Fair Value Measurements (Details) [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  | 100,000 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByAssetClassAxis = kim_OtherRealEstateInvestmentsMember |  |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Note 11 - Fair Value Measurements (Details) [Line Items] |  |  |  |  |
Marketable Securities | 102,700,000 us-gaap_MarketableSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |  |  | 87,700,000 us-gaap_MarketableSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Note 11 - Fair Value Measurements (Details) [Line Items] |  |  |  |  |
Marketable Securities | $ 2,400,000 us-gaap_MarketableSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |  |  | $ 2,300,000 us-gaap_MarketableSecurities / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |
[1] | As of March 31, 2015 and December 31, 2014, the Company determined that $102.7 million and $87.7 million, respectively, of the Marketable securities estimated fair value were classified within Level 1 of the fair value hierarchy and the remaining $2.4 million and $2.3 million, respectively, were classified within Level 3 of the fair value hierarchy.

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228 + Details
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