XML 45 R31.htm IDEA: XBRL DOCUMENT
v3.21.2

Investments (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Fixed-Maturity Securities Political Subdivisions Of States Territories And Possessions [Member] |  |
Cost or amortized cost | $ 14,384,428 | $ 5,287,561
Gross unrealized gains | 259,721 | 355,541
Gross unrealized losses - less than 12 months | (89,844) | 0
Gross unrealized loss - more than 12 months | 0 | 0
Estimated fair value | 14,554,305 | 5,643,102
Net unrealized gains | 169,877 | 355,541
Fixed-Maturity Securities Corporate And Other Bonds Industrial And Miscellaneous [Member] |  |
Cost or amortized cost | 88,059,505 | 108,573,422
Gross unrealized gains | 7,391,053 | 11,634,123
Gross unrealized losses - less than 12 months | (27,577) | 13,216
Gross unrealized loss - more than 12 months | 0 | 0
Estimated fair value | 95,422,981 | 120,194,329
Net unrealized gains | 7,363,476 | 11,620,907
Fixed Maturity Securities Residential Mortgage and other asset backed securities [Member] |  |
Cost or amortized cost | 40,988,538 | 28,163,891
Gross unrealized gains | 561,035 | 617,368
Gross unrealized losses - less than 12 months | (243,639) | 7,371
Gross unrealized loss - more than 12 months | (858) | 111,947
Estimated fair value | 41,305,076 | 28,661,941
Net unrealized gains | 316,538 | 498,050
Fixed Maturity Securities Total Fixed Maturity Securities [Member] |  |
Cost or amortized cost | 145,435,406 | 145,045,584
Gross unrealized gains | 8,215,754 | 12,636,222
Gross unrealized losses - less than 12 months | (361,060) | 20,587
Gross unrealized loss - more than 12 months | (858) | 111,947
Estimated fair value | 153,289,242 | 157,549,272
Net unrealized gains | 7,853,836 | 12,503,688
U.S. Treasury Securities and Obligations of U.S. Government [Member] |  |
Cost or amortized cost | 2,002,935 | 3,020,710
Gross unrealized gains | 3,945 | 29,190
Gross unrealized losses - less than 12 months | 0 | 0
Gross unrealized loss - more than 12 months | 0 | 0
Estimated fair value | 2,006,880 | 3,049,900
Net unrealized gains | $ 3,945 | $ 29,190

X
- References No definition available. + Details
Name: | kins_AvailableForSaleSecuritiesContinuousGrossUnrealizedLossPosition12MonthsOrLongerLosses
Namespace Prefix: | kins_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | kins_AvailableForSaleSecuritiesContinuousGrossUnrealizedLossPositionLessThan12MonthsLosses
Namespace Prefix: | kins_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | kins_AvailableForSaleSecuritiesFairValueDisclosure1
Namespace Prefix: | kins_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | kins_NetUnrealizedGainsLosses
Namespace Prefix: | kins_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=kins_FixedMaturitySecuritiesPoliticalSubdivisionsOfStatesTerritoriesAndPossessionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=kins_FixedMaturitySecuritiesCorporateAndOtherBondsIndustrialAndMiscellaneousMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=kins_FixedMaturitySecuritiesMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=kins_FixedMaturitySecuritiesTotalFixedMaturitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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