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Schedule of Aggregate Fair Value Loans Held for Sale (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Loans Held For Sale
Aggregate fair value	$ 142,897,741	$ 126,549,190
Unpaid principal balance	139,678,479	127,185,867
Unrealized gain (loss)	$ 3,219,262	$ (636,677)

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- Definition

Represents the monetary amount of Aggregate Fair Value - Loans Held For Sale, as of the indicated date.

+ References

No definition available.

+ Details

Name:	SNFCA_AggregateFairValueLoansHeldForSale
Namespace Prefix:	SNFCA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Represents the monetary amount of Aggregate unpaid principal balance - Loans Held for Sale, as of the indicated date.

+ References

No definition available.

+ Details

Name:	SNFCA_AggregateUnpaidPrincipalBalanceLoansHeldForSale
Namespace Prefix:	SNFCA_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	SNFCA_DisclosureLoansHeldForSaleAbstract
Namespace Prefix:	SNFCA_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Unrealized gain loss loans held for sale.

+ References

No definition available.

+ Details

Name:	SNFCA_UnrealizedGainLossLoansHeldForSale
Namespace Prefix:	SNFCA_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant