XML 49 R38.htm IDEA: XBRL DOCUMENT v3.21.2

Loans and Allowance for Loan Losses (Schedule of Breakdown of Outstanding Loans by Risk Category) (Details) - Commercial Loan [Member] - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	$ 1,494,996	$ 1,387,655
Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	1,403,325	1,369,552
Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	51,524	2,914
Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	40,147	15,189
Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Owner Occupied Re [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	470,614	433,320
Owner Occupied Re [Member] | Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	469,715	430,291
Owner Occupied Re [Member] | Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	333	624
Owner Occupied Re [Member] | Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	566	2,405
Owner Occupied Re [Member] | Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Non Owner Occupied Re [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	628,521	585,269
Non Owner Occupied Re [Member] | Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	544,427	576,095
Non Owner Occupied Re [Member] | Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	48,540	587
Non Owner Occupied Re [Member] | Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	35,554	8,587
Non Owner Occupied Re [Member] | Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Construction Loans [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	87,892	61,467
Construction Loans [Member] | Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	87,892	61,328
Construction Loans [Member] | Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Construction Loans [Member] | Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans		139
Construction Loans [Member] | Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans
Business Loan [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	307,969	307,599
Business Loan [Member] | Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	301,291	301,838
Business Loan [Member] | Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	2,651	1,703
Business Loan [Member] | Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans	4,027	4,058
Business Loan [Member] | Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding commercial loans

X

- References

No definition available.

+ Details

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

X

- Definition

Amount, before allowance and fees, of loans and leases receivable. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

+ Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sfst_OwnerOccupiedReMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sfst_NonOwnerOccupiedReMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=sfst_BusinessLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: