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Schedule of Aggregate Fair Value Loans Held for Sale (Details) - USD ($) | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Loans Held For Sale |  |
Aggregate fair value | $ 112,678,958 | $ 126,549,190
Unpaid principal balance | 113,616,499 | 127,185,867
Unrealized loss | $ (937,541) | $ (636,677)

X
- 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_
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
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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
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