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Property and Casualty Insurance Activity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Change in unearned premiums [Member]
Assumed	$ 0	$ 0
Ceeded	1,953,322	(637,535)
Net	4,286,206	1,755,192
Direct	2,332,884	2,392,727
Premiums earned [Member]
Assumed	0	0
Ceeded	(21,675,377)	(18,703,244)
Net	28,254,953	26,673,380
Direct	49,930,330	45,376,624
Premiums written Member
Assumed	0	0
Ceeded	(23,628,699)	(18,065,709)
Net	23,968,747	24,918,188
Direct	$ 47,597,446	$ 42,983,897

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- References

No definition available.

+ Details

Name:	king_AssumedPropertyAndCasultyInsuranceActivity
Namespace Prefix:	king_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	king_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	king_DirectPropertyAndCasultyInsuranceActivity
Namespace Prefix:	king_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	king_NetPropertyAndCasultyInsuranceActivity
Namespace Prefix:	king_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=king_ChangeinunearnedpremiumsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=king_PremiumsearnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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- Details

Name:	srt_TitleOfIndividualAxis=king_PremiumswrittenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: