XML 71 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1

Mortgage Loans Held for Sale (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Mortgage Loans Held for Sale (Textual)
Mortgage loans held for sale, fair value	$ 11.8	$ 7.8

X

- References

No definition available.

+ Details

Name:	sfst_MortgageLoansHeldForSaleTextualAbstract
Namespace Prefix:	sfst_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of mortgage loans held-for-sale.

+ References

No definition available.

+ Details

Name:	us-gaap_MortgagesHeldForSaleFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant