XML 51 R39.htm IDEA: XBRL DOCUMENT v3.20.2

3) Investments: Net carrying amount of held to maturity securities (Details) - Held-to-maturity Securities {1} - USD ($)	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net carrying amount for sales of securities		$ 2,724,199
Net realized loss related to sales of securities		$ 12,394
Proceeds received from sale of fixed maturity available for sale securities	$ 2,967,531
Gross realized gains	149,641
Gross realized losses	$ 1,043

X

- References

No definition available.

+ Details

Name:	snfc_GrossRealizedGain
Namespace Prefix:	snfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	snfc_GrossRealizedLoss
Namespace Prefix:	snfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the monetary amount of Net carrying amount for sales of securities, during the indicated time period.

+ References

No definition available.

+ Details

Name:	snfc_NetCarryingAmountForSalesOfSecurities
Namespace Prefix:	snfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the monetary amount of Net realized loss related to sales of securities, during the indicated time period.

+ References

No definition available.

+ Details

Name:	snfc_NetRealizedLossRelatedToSalesOfSecurities
Namespace Prefix:	snfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	snfc_ProceedsReceivedFromSaleOfFixedMaturityAvailableForSaleSecurities
Namespace Prefix:	snfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	snfc_GainsLossesOnInvestmentsByCategoryAxis=snfc_HeldToMaturitySecurities1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: