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6. Property and Casualty Insurance Activity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Premiums Written [Member]
Direct	$ 37,488,548	$ 31,526,283
Assumed	(34)	336
Ceded	(7,127,909)	(7,826,235)
Net	30,360,605	23,700,384
Changes In Unearned Premiums [Member]
Direct	(628,067)	(1,008,869)
Assumed	195	1,901
Ceded	(136,844)	144,201
Net	(764,716)	(862,767)
Premiums Earned [Member]
Direct	36,860,481	30,517,414
Assumed	161	2,237
Ceded	(7,264,753)	(7,682,034)
Net	$ 29,595,889	$ 22,837,617

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: