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7. Reinsurance (Details) - USD ($) | 5 Months Ended | 12 Months Ended | 13 Months Ended
--- | --- | --- | ---
Dec. 14, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2020
Personal Lines |  |  |  |  |
Percent ceded | 0.00% |  | 10.00% | 20.00% | 25.00%
Risk retained on initial $1,000,000 of losses | $ 1,000,000 |  | $ 900,000 | $ 800,000 | $ 750,000
Losses per occurrence subject to quota share reinsurance coverage | 0 |  | 1,000,000 | 1,000,000 | 1,000,000
Excess of loss coverage above quota share coverage | 10,000,000 |  | 9,000,000 | 9,000,000 | 9,000,000
In excess of | 0 |  | 1,000,000 | 1,000,000 | 1,000,000
Total reinsurance coverage per occurrence | 9,000,000 |  | 9,100,000 | 9,200,000 | 9,250,000
Losses per occurrence subject to reinsurance coverage | $ 10,000,000 |  | $ 10,000,000 | $ 10,000,000 | $ 10,000,000
Expiration date | Jun. 30, 2020 |  | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2020
Catastrophe |  |  |  |  |
Initial loss subject to personal lines quota share treaty | $ 0 |  | $ 5,000,000 | $ 0 | $ 7,500,000
Risk retained per catastrophe occurrence | 7,500,000 |  | 4,500,000 | 4,000,000 | 5,625,000
Catastrophe loss coverage in excess of quota share coverage | $ 602,500,000 |  | $ 445,000,000 | $ 315,000,000 | $ 602,500,000
Reinstatement premium protection | Yes |  | Yes | Yes | Yes
Personal Umbrella |  |  |  |  |
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 on initial $1,000,000 of losses |  | $ 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 |  |  |  |  |
Risk retained on initial $1,000,000 of losses |  | $ 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 |  |  |  |  |
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 on initial $1,000,000 of losses |  | $ 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 |

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=us-gaap_CatastropheMember
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: |