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Note 25 - Captive Insurance Company (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Letters of Credit Outstanding, Amount | $ 41,800,000 |
Kimco Insurance Company [Member] |  |
Captive Insurance, Percentage of Occurance Risk Layer | 100.00% |
Captive Insurance, Obligation Per Occurrence | $ 250,000 |
Letters of Credit Outstanding, Amount |  | $ 23,000,000
Increase (Decrease) in Incurred Insurance Losses and Loss Adjustment Expenses | (2,700,000) | $ 700,000
Kimco Insurance Company [Member] | Minimum [Member] |  |
Captive Insurance, Annual Aggregates Per Policy | $ 7,800,000 |
Captive Insurance, Obligations to Reinsurance Provider, Percent of Incurred Losses | 8.00% |
Kimco Insurance Company [Member] | Maximum [Member] |  |
Captive Insurance, Annual Aggregates Per Policy | $ 11,100,000 |
Captive Insurance, Obligations to Reinsurance Provider, Percent of Incurred Losses | 12.20% |

X
- Definition The amount of annual aggregates for captive insurance coverage policies. + References No definition available. + Details
Name: | kim_CaptiveInsuranceAnnualAggregatesPerPolicy
Namespace Prefix: | kim_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount the company is obligated to cover per occurrence. + References No definition available. + Details
Name: | kim_CaptiveInsuranceObligationPerOccurrence
Namespace Prefix: | kim_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The percentage of incurred losses that the captive insurance company is required to pay to the reinsurance provider. + References No definition available. + Details
Name: | kim_CaptiveInsuranceObligationsToReinsuranceProviderPercentOfIncurredLosses
Namespace Prefix: | kim_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of occurrence risk layer that is assumed by the insurance company. + References No definition available. + Details
Name: | kim_CaptiveInsurancePercentageOfOccuranceRiskLayer
Namespace Prefix: | kim_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the amount of increase (decrease) in incurred insurance losses and loss adjustment expenses. + References No definition available. + Details
Name: | kim_IncreaseDecreaseInIncurredInsuranceLossesAndLossAdjustmentExpenses
Namespace Prefix: | kim_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=kim_KimcoInsuranceCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |