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6. Property and Casualty Insurance Activity (Details 5) - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Personal Lines [Member] |  |  |
Percent ceded | 0.00% | 10.00% | 20.00%
Risk retained | $ 1,000,000 | $ 900,000 | $ 800,000
Losses per occurrence subject to quota share reinsurance coverage | 0 | 1,000,000 | 1,000,000
Excess of loss coverage above quota share coverage | 10,000,000 | 9,000,000 | 9,000,000
In excess of | 0 | 1,000,000 | 1,000,000
Total reinsurance coverage per occurrence | 9,000,000 | 9,100,000 | 9,200,000
Losses per occurrence subject to reinsurance coverage | $ 10,000,000 | $ 10,000,000 | $ 10,000,000
Expiration date | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2019
Personal Umbrella [Member] |  |  |
Percent ceded - first million dollars of coverage | 90.00% | 90.00% | 90.00%
Percent ceded - excess of one million dollars of coverage | 100.00% | 100.00% | 100.00%
Risk retained | $ 100,000 | $ 100,000 | $ 100,000
Total reinsurance coverage per occurrence | 4,900,000 | 4,900,000 | 4,900,000
Losses per occurrence subject to reinsurance coverage | $ 5,000,000 | $ 5,000,000 | $ 5,000,000
Expiration date | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Commercial Lines [Member] |  |  |
Risk retained | $ 750,000 | $ 750,000 | $ 750,000
Excess of loss coverage above quota share coverage | 3,750,000 | 3,750,000 | 3,750,000
In excess of | 750,000 | 750,000 | 750,000
Total reinsurance coverage per occurrence | 3,750,000 | 3,750,000 | 3,750,000
Losses per occurrence subject to reinsurance coverage | $ 4,500,000 | $ 4,500,000 | $ 4,500,000
Commercial Umbrella [Member] |  |  |
Percent ceded - first million dollars of coverage | 0.00% | 90.00% | 90.00%
Percent ceded - excess of one million dollars of coverage | 0.00% | 100.00% | 100.00%
Risk retained | $ 0 | $ 100,000 | $ 100,000
Total reinsurance coverage per occurrence | 0 | 4,900,000 | 4,900,000
Losses per occurrence subject to reinsurance coverage | 0 | $ 5,000,000 | $ 5,000,000
Expiration date |  | Jun. 30, 2019 | Jun. 30, 2018
Catastrophe [Member] |  |  |
Initial loss subject to personal lines quota share treaty | 0 | $ 5,000,000 | $ 5,000,000
Risk retained per catastrophe occurrence | 7,500,000 | 4,500,000 | 4,000,000
Catastrophe loss coverage in excess of quota share coverage | $ 602,500,000 | $ 445,000,000 | $ 315,000,000
Reinstatement premium protection | Yes | Yes | Yes

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_CatastropheLossCoverageInExcessOfQuotaShareCoverageWinterStormCoverage1
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_ExcessOfLossCoverageAboveQuotaShareCoverage
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_ExpirationDate
Namespace Prefix: | KINS_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_InExcessOf
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_InitialLossSubjectToPersonalLinesQuotaShareTreaty
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_LossesPerOccurrenceSubjectToQuotaShareReinsuranceCoverage
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_LossesPerOccurrenceSubjectToReinsuranceCoverage
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_PercentCeded
Namespace Prefix: | KINS_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_PercentCededExcessOfOneMillionOfCoverage
Namespace Prefix: | KINS_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_PercentCededFirstMillionDollarsOfCoverage
Namespace Prefix: | KINS_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_ReinstatementPremiumProtection
Namespace Prefix: | KINS_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_RiskRetained1
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_RiskRetainedPerCatastropheOccurrence
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Custom Element. + References No definition available. + Details
Name: | KINS_TotalReinsuranceCoveragePerOccurrence
Namespace Prefix: | KINS_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=KINS_PersonalUmbrellaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=KINS_CommercialUmbrellaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CatastropheMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |