XML 92 R79.htm IDEA: XBRL DOCUMENT
v3.21.1

5) Value of Business Acquired, Intangible Assets and Goodwill: Schedule of Value of Business Acquired (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |  |  |  |
Value of business acquired, balance at start of period |  |  |  |  | $ 8,955,249 | $ 9,876,647 | $ 5,765,190
Value of business acquired |  |  |  |  |  | 0 | 4,962,831
Imputed interest at 7% included in earnings |  |  |  |  |  | 670,565 | 472,916
Amortization included in earnings |  |  |  |  |  | (1,457,390) | (1,320,456)
Shadow amortization included in other comprehensive income |  |  |  |  |  | (134,573) | (3,834)
Net amortization | $ (707,000) | $ (784,000) | $ (854,000) | $ (918,000) | $ (1,019,000) | (921,398) | (851,374)
Value of business acquired, balance at start of period |  |  |  |  |  | $ 8,955,249 | $ 9,876,647

X
- Definition Represents the monetary amount of Imputed interest on value of business acquired, during the indicated time period. + References No definition available. + Details
Name: | snfc_ImputedInterestOnValueOfBusinessAcquired
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the monetary amount of Increase (Decrease) in value of business acquired, during the indicated time period. + References No definition available. + Details
Name: | snfc_IncreaseDecreaseInValueOfBusinessAcquired
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the monetary amount of Shadow amortization included in other comprehensive income, during the indicated time period. + References No definition available. + Details
Name: | snfc_ShadowAmortizationIncludedInOtherComprehensiveIncome
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the monetary amount of Value of business acquired, balance at start of period, as of the indicated date. + References No definition available. + Details
Name: | snfc_ValueOfBusinessAcquired
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the monetary amount of Value of business acquired - amortization, during the indicated time period. + References No definition available. + Details
Name: | snfc_ValueOfBusinessAcquiredAmortization
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the monetary amount of Value of business acquired - net amortization charged to income, during the indicated time period. + References No definition available. + Details
Name: | snfc_ValueOfBusinessAcquiredNetAmortizationChargedToIncome
Namespace Prefix: | snfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration