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Loans Held For Sale: Aggregate fair value - Loans Held for Sale (Details) - USD ($) | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Loans Held For Sale |  |
Aggregate fair value | $ 296,728,086 | $ 422,772,418
Unpaid principal balance | 287,867,995 | 406,407,323
Unrealized gain | $ 8,860,091 | $ 16,365,095

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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: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- References No definition available. + Details
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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
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Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
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Period Type: | instant