Schedule of Aggregate Fair Value Loans Held for Sale (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Loans Held For Sale
Aggregate fair value	$ 152,546,566	$ 141,179,620
Unpaid principal balance	153,420,558	141,337,811
Unrealized loss	$ (873,992)	$ (158,191)

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

No definition available.

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