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Schedule of Aggregate Fair Value Loans Held for Sale (Details) - USD ($) | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Loans Held For Sale |  |
Aggregate fair value | $ 161,310,060 | $ 141,179,620
Unpaid principal balance | 162,075,374 | 141,337,811
Unrealized loss | $ (765,314) | $ (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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Data Type: | xbrli:monetaryItemType
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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
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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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Data Type: | xbrli:stringItemType
Balance Type: | na
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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