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Note 11 - Marketable Securities (Details) - Marketable Securities (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Note 11 - Marketable Securities (Details) - Marketable Securities [Line Items] |  |
Equity securities - Gross Unrealized Gains | $ 46,197 us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains | $ 25,995 us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
Equity securities - Estimated Fair Value | 87,659 us-gaap_AvailableForSaleSecurities | 59,723 us-gaap_AvailableForSaleSecurities
Other debt securities - Gross Unrealized Gains | (200)kim_HeldToMaturitySecuritiesGrossUnrealizedGain | 59 kim_HeldToMaturitySecuritiesGrossUnrealizedGain
Other debt securities - Estimated Fair Value | 2,376 us-gaap_HeldToMaturitySecuritiesFairValue | 3,102 us-gaap_HeldToMaturitySecuritiesFairValue
Total marketable securities - Amortized Cost | 90,235 us-gaap_MarketableSecurities | 62,766 us-gaap_MarketableSecurities
Total marketable securities - Gross Unrealized Gains | 45,997 kim_MarketableSecuritiesGrossUnrealizedGain | 26,054 kim_MarketableSecuritiesGrossUnrealizedGain
Total marketable securities - Estimated Fair Value | 90,035 kim_MarketableSecuritiesFairValue | 62,825 kim_MarketableSecuritiesFairValue
Amortized Cost [Member] |  |
Note 11 - Marketable Securities (Details) - Marketable Securities [Line Items] |  |
Equity securities - Amortized Cost | 41,462 us-gaap_AvailableForSaleSecuritiesAmortizedCost / kim_DisclosureAxis = kim_AmortizedCostMember | 33,728 us-gaap_AvailableForSaleSecuritiesAmortizedCost / kim_DisclosureAxis = kim_AmortizedCostMember
Other debt securities - Amortized Cost | 2,576 us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment / kim_DisclosureAxis = kim_AmortizedCostMember | 3,043 us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment / kim_DisclosureAxis = kim_AmortizedCostMember
Total marketable securities - Amortized Cost | $ 44,038 us-gaap_MarketableSecurities / kim_DisclosureAxis = kim_AmortizedCostMember | $ 36,771 us-gaap_MarketableSecurities / kim_DisclosureAxis = kim_AmortizedCostMember

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity. + References No definition available. + Details
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- Definition Fair value of investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 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) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 + Details
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- Definition Total debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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