XML 107 R95.htm IDEA: XBRL DOCUMENT
v3.24.3

Schedule of Restricted Assets in Cemetery and Mortuary Endowment Care and Pre need Merchandise Funds (Details) - USD ($) | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Dec. 31, 2022
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost | $ 347,143,698 |  | $ 390,884,441 |  |  |
Available for sale securities, unrecognized holding gain | 7,838,153 |  | 4,550,214 |  |  |
Available for sale securities, unrecognized holding loss | (8,053,913) | [1] | (13,584,120) | [2] |  |
Available for sale securities, estimated fair value | 346,513,336 |  | 381,535,986 |  |  |
Available-for-sale securities, amortized cost basis | 11,357,095 |  | 10,571,505 |  |  |
Available-for-sale securities, gross unrealized gain | 16,385,571 |  | 13,636,071 |  |  |
Mortgage loans on real estate and construction | 281,734,182 |  | 275,616,837 |  |  |
Accrued investment income | 7,860,824 |  | 10,170,790 |  |  |
Cash and cash equivalents | 188,938,399 |  | 139,923,399 |  | $ 147,122,807 | $ 133,483,817
Total restricted assets | 27,957,336 |  | 20,028,976 |  |  |
Cemetery Perpectual Care Obligation [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost |  |  | 647,261 |  |  |
Available for sale securities, unrecognized holding gain | 1,815 |  | 302 |  |  |
Available for sale securities, unrecognized holding loss | (4,934) |  | (5,859) |  |  |
Available for sale securities, estimated fair value | 771,935 |  | 641,704 |  |  |
Accrued investment income | 2,369 |  |  |  |  |
Cash and cash equivalents | 2,999,256 |  | 2,867,047 |  |  |
Restricted Assets [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost | 1,748,149 |  | 1,860,195 |  |  |
Available for sale securities, unrecognized holding gain | 5,935 |  | 1,947 |  |  |
Available for sale securities, unrecognized holding loss | (6,500) |  | (8,282) |  |  |
Available for sale securities, estimated fair value | 1,747,584 |  | 1,853,860 |  |  |
Allowance for Credit Losses |  |  |  |  |  |
Cash and cash equivalents | 15,232,601 | [3] | 10,114,694 | [4] |  |
Total restricted assets | 27,957,336 |  | 20,028,976 |  |  |
Residential Construction [Member] | Cemetery Perpectual Care Obligation [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Mortgage loans on real estate and construction | (200) |  | (495) |  |  |
Mortgage loans on real estate and construction | 100,000 |  | 247,360 |  |  |
Residential Construction [Member] | Restricted Assets [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Mortgage loans on real estate and construction | 1,113,300 |  | 676,572 |  |  |
Fair value allowance for credit losses | (2,227) |  | (1,353) |  |  |
Mortgage loans on real estate and construction | 1,111,073 |  | 675,219 |  |  |
Accrued investment income | 5,167 |  |  |  |  |
US Government Corporations and Agencies Securities [Member] | Cemetery Perpectual Care Obligation [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost |  |  | 53,672 |  |  |
Available for sale securities, unrecognized holding gain |  |  |  |  |  |
Available for sale securities, unrecognized holding loss |  |  | (171) |  |  |
Available for sale securities, estimated fair value |  |  | 53,501 |  |  |
US Treasury Securities [Member] | Cemetery Perpectual Care Obligation [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost | 649,256 |  | 477,797 |  |  |
Available for sale securities, unrecognized holding gain | 1,815 |  | 302 |  |  |
Available for sale securities, unrecognized holding loss | (385) |  | (574) |  |  |
Available for sale securities, estimated fair value | 650,686 |  | 477,525 |  |  |
US Treasury Securities [Member] | Restricted Assets [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost | 1,002,584 |  | 932,737 |  |  |
Available for sale securities, unrecognized holding gain | 5,878 |  | 1,433 |  |  |
Available for sale securities, unrecognized holding loss | (240) |  | (1,000) |  |  |
Available for sale securities, estimated fair value | 1,008,222 |  | 933,170 |  |  |
Allowance for Credit Losses |  |  |  |  |  |
US States and Political Subdivisions Debt Securities [Member] | Cemetery Perpectual Care Obligation [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost | 125,798 |  | 115,792 |  |  |
Available for sale securities, unrecognized holding gain |  |  |  |  |  |
Available for sale securities, unrecognized holding loss | (4,549) |  | (5,114) |  |  |
Available for sale securities, estimated fair value | 121,249 |  | 110,678 |  |  |
US States and Political Subdivisions Debt Securities [Member] | Restricted Assets [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost | 550,532 |  | 652,770 |  |  |
Available for sale securities, unrecognized holding gain | 27 |  | 305 |  |  |
Available for sale securities, unrecognized holding loss | (4,881) |  | (4,542) |  |  |
Available for sale securities, estimated fair value | 545,678 |  | 648,533 |  |  |
Allowance for Credit Losses |  |  |  |  |  |
Corporate Debt Securities [Member] | Restricted Assets [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available for sale securities, amortized cost | 195,033 |  | 274,688 |  |  |
Available for sale securities, unrecognized holding gain | 30 |  | 209 |  |  |
Available for sale securities, unrecognized holding loss | (1,379) |  | (2,740) |  |  |
Available for sale securities, estimated fair value | 193,684 |  | 272,157 |  |  |
Allowance for Credit Losses |  |  |  |  |  |
Industrial Miscellaneous and All Other [Member] | Cemetery Perpectual Care Obligation [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available-for-sale securities, amortized cost basis | 3,830,983 |  | 3,614,392 |  |  |
Available for sale securities, unrecognized holding gain | 1,362,684 |  | 859,680 |  |  |
Available for sale securities, unrecognized holding loss | (121,246) |  | (146,771) |  |  |
Available-for-sale securities, gross unrealized gain | 5,072,421 |  | 4,327,301 |  |  |
Industrial Miscellaneous and All Other [Member] | Restricted Assets [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available-for-sale securities, amortized cost basis | 7,996,032 |  | 6,516,044 |  |  |
Available for sale securities, unrecognized holding gain | 2,075,560 |  | 1,117,155 |  |  |
Available for sale securities, unrecognized holding loss | (210,681) |  | (247,996) |  |  |
Available-for-sale securities, gross unrealized gain | 9,860,911 |  | 7,385,203 |  |  |
Equity Securities One [Member] | Cemetery Perpectual Care Obligation [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available-for-sale securities, amortized cost basis | 3,830,983 |  | 3,614,392 |  |  |
Available for sale securities, unrecognized holding gain | 1,362,684 |  | 859,680 |  |  |
Available for sale securities, unrecognized holding loss | (121,246) |  | (146,771) |  |  |
Available-for-sale securities, gross unrealized gain | 5,072,421 |  | 4,327,301 |  |  |
Mortgage loans on real estate and construction | 99,800 |  | 246,865 |  |  |
Equity Securities One [Member] | Restricted Assets [Member] |  |  |  |  |  |
Impairment Effects on Earnings Per Share [Line Items] |  |  |  |  |  |
Available-for-sale securities, amortized cost basis | 7,996,032 |  | 6,516,044 |  |  |
Available for sale securities, unrecognized holding gain | 2,075,560 |  | 1,117,155 |  |  |
Available for sale securities, unrecognized holding loss | (210,681) |  | (247,996) |  |  |
Available-for-sale securities, gross unrealized gain | $ 9,860,911 |  | $ 7,385,203 |  |  |
[1] | Gross unrealized losses are net of allowance for credit losses
[2] | Gross unrealized losses are net of allowance for credit losses
[3] | Including cash and cash equivalents of $12,032,252 for the life insurance and mortgage segments.
[4] | Including cash and cash equivalents of $6,930,930 for the life insurance and mortgage segments.

X
- Definition Aggregate estimated fair value allowance for credit losses. + References No definition available. + Details
Name: | SNFCA_AggregateEstimatedFairValueAllowanceForCreditLosses
Namespace Prefix: | SNFCA_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregate fair value allowance for credit losses. + References No definition available. + Details
Name: | SNFCA_AggregateFairValueAllowanceForCreditLosses
Namespace Prefix: | SNFCA_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Allowance for credit losses. + References No definition available. + Details
Name: | SNFCA_AllowanceForCreditLosses
Namespace Prefix: | SNFCA_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_AccruedInvestmentIncomeReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unrealized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-24 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-4 + Details
Name: | us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483467/210-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A + Details
Name: | us-gaap_EquitySecuritiesFvNi
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_EquitySecuritiesFvNiCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of unrealized gain on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-4 + Details
Name: | us-gaap_EquitySecuritiesFvNiUnrealizedGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized loss on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-4 + Details
Name: | us-gaap_EquitySecuritiesFvNiUnrealizedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ImpairmentEffectsOnEarningsPerShareLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 80 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480078/944-80-55-14 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 80 -Name Accounting Standards Codification -Section 55 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480078/944-80-55-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-13 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 29 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-29 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (1) -Publisher SEC Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (2) -Publisher SEC Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph a -Publisher SEC Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-80 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479294/326-20-55-79 Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-14 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 210 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477220/954-210-45-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478600/954-210-50-2 + Details
Name: | us-gaap_RestrictedInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=SNFCA_ResidentialConstructionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=SNFCA_IndustrialMiscellaneousAndAllOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=SNFCA_EquitySecuritiesOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |