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Note 11 - Marketable Securities (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Note 11 - Marketable Securities (Details) [Line Items] |  |  |
Proceeds from Sale and Maturity of Marketable Securities | $ 3,780,000 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | $ 26,406,000 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | $ 156,000 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Available-for-sale Securities, Gross Realized Gains | 0 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 12,100,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains | 0 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Available-for-sale Securities, Gross Realized Losses | 100,000 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | 0 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses | 0 us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount | 1,800,000 us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount |  |
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount | 800,000 us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount |  |
Additional [Member] | Minimum [Member] |  |  |
Note 11 - Marketable Securities (Details) [Line Items] |  |  |
Number of Years | 1 kim_NumberOfYears / kim_DisclosureAxis = kim_AdditionalMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Additional [Member] | Maximum [Member] |  |  |
Note 11 - Marketable Securities (Details) [Line Items] |  |  |
Number of Years | 5 kim_NumberOfYears / kim_DisclosureAxis = kim_AdditionalMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Additional 1 [Member] | Minimum [Member] |  |  |
Note 11 - Marketable Securities (Details) [Line Items] |  |  |
Number of Years | 5 kim_NumberOfYears / kim_DisclosureAxis = kim_Additional1Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Certain Marketable Securities [Member] |  |  |
Note 11 - Marketable Securities (Details) [Line Items] |  |  |
Proceeds from Sale and Maturity of Marketable Securities | $ 3,800,000 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = kim_CertainMarketableSecuritiesMember | $ 26,400,000 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = kim_CertainMarketableSecuritiesMember | $ 200,000 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = kim_CertainMarketableSecuritiesMember

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- Definition Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the fifth through tenth fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f)(3) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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