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Schedule of Aggregate Fair Value Loans Held for Sale (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Loans Held For Sale
Aggregate fair value	$ 126,549,190	$ 141,179,620
Unpaid principal balance	127,185,867	141,337,811
Unrealized loss	$ (636,677)	$ (158,191)

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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

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Namespace Prefix:	SNFCA_
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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

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

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- Definition

Represents the monetary amount of Unrealized gain - Loans Held for Sale, as of the indicated date.

+ References

No definition available.

+ Details

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