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v3.21.1

Property and Casualty Insurance Activity (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Premiums Written |  |
Direct | $ 38,129,117 | $ 36,696,929
Assumed | 0 | 0
Ceded | 7,329,507 | 13,506,255
Net | 30,799,610 | 23,190,674
Changes In Unearned Premiums |  |
Direct | 3,789,478 | 5,904,700
Assumed | 0 | 0
Ceded | 130 | 2,153,924
Net | 3,789,608 | 3,750,776
Premiums Earned |  |
Direct | 41,918,595 | 42,601,629
Assumed | 0 | 0
Ceded | 7,329,377 | 15,660,179
Net | $ 34,589,218 | $ 26,941,450

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

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

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

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

X
- Details
Name: | us-gaap_ReinsurancePolicyTypeAxis=kins_PremiumsWrittenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReinsurancePolicyTypeAxis=kins_ChangesInUnearnedPremiumsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReinsurancePolicyTypeAxis=kins_PremiumsEarnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |