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Schedule of Statutory Accounting Practices (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Statutory net income amount	$ 13,705,295	$ 11,345,837
Statutory capital and surplus, balance	120,216,493	107,384,632
Security National Life Insurance [Member]
Statutory net income amount	9,618,883	7,419,511
Statutory capital and surplus, balance	87,559,495	76,330,794
Kilpatrick Life Insurance Company [Member]
Statutory net income amount	2,749,370	2,967,779
Statutory capital and surplus, balance	21,419,520	20,535,591
First Guaranty Insurance Company [Member]
Statutory net income amount	1,336,977	958,497
Statutory capital and surplus, balance	9,140,283	8,427,355
Southern Security Life Insurance Company, Inc. [Member]
Statutory net income amount	24	35
Statutory capital and surplus, balance	1,584,583	1,578,322
Trans-Western Life Insurance Company [Member]
Statutory net income amount	41	15
Statutory capital and surplus, balance	$ 512,612	$ 512,570

X

- Definition

The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.

+ 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)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of net income for the period determined using accounting principles prescribed or permitted by insurance regulators.

+ 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)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

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Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=SNFCA_FirstGuarantyInsuranceCompanyMember
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X

- Details

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X

- Details

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