XML 49 R35.htm IDEA: XBRL DOCUMENT
v3.21.2

Investments (Details 4) - USD ($) | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Amortized cost | $ 9,166,983 | $ 7,368,815
Estimated fair value | 9,699,504 | 8,194,824
Less Than One Year [Member] |  |
Amortized cost | 1,394,102 | 0
Estimated fair value | 1,420,414 | 0
One To Five Years [Member] |  |
Amortized cost | 1,205,500 | 2,598,193
Estimated fair value | 1,301,973 | 2,777,936
Five To Ten Years [Member] |  |
Amortized cost | 1,511,072 | 1,502,603
Estimated fair value | 1,686,289 | 1,727,316
More Than 10 Years [Member] |  |
Amortized cost | 5,056,309 | 3,268,019
Estimated fair value | $ 5,290,828 | $ 3,689,572

X
- References No definition available. + Details
Name: | kins_AmortizedCostHeldToMaturitySecurities
Namespace Prefix: | kins_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | kins_FairValueHeldToMaturitySecurities
Namespace Prefix: | kins_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=kins_LessThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=kins_OneToFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=kins_FiveToTenYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=kins_MoreThan10YearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |