XML 51 R39.htm IDEA: XBRL DOCUMENT
v3.21.1

3) Investments: Schedule of Major categories of net investment income (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Gross investment income | $ 17,710,969 | $ 16,680,230
Investment Income, Investment Expense | (3,417,082) | (3,279,731)
Net investment income | 14,293,887 | 13,400,499
Fixed Maturities |  |
Gross investment income | 2,824,111 | 2,924,714
Equity Securities |  |
Gross investment income | 128,229 | 92,042
Mortgage Loans Real Estate |  |
Gross investment income | 6,084,417 | 5,653,890
Real Estate |  |
Gross investment income | 3,042,829 | 3,153,385
Policy Student and Other Loans |  |
Gross investment income | 232,353 | 233,966
Insurance Assignments |  |
Gross investment income | 5,345,729 | 4,299,205
Other Investments {1} |  |
Gross investment income | 13,707 | 25,023
Cash and Cash Equivalents |  |
Gross investment income | $ 39,594 | $ 298,005

X
- Definition Represents the monetary amount of Gross investment income, during the indicated time period. + References No definition available. + Details
Name: | snfc_GrossInvestmentIncome
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expenses related to the generation of investment income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
Name: | us-gaap_InvestmentIncomeInvestmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(2)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
Name: | us-gaap_NetInvestmentIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=snfc_FixedMaturities1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=snfc_EquitySecurities1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=snfc_MortgageLoansRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=snfc_RealEstate1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=snfc_PolicyStudentAndOtherLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=snfc_InsuranceAssignmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=snfc_OtherInvestments1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=snfc_CashAndCashEquivalents1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |