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