XML 48 R37.htm IDEA: XBRL DOCUMENT v3.19.1

Loans and Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	$ 561,692	$ 548,627
Consumer loans [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	561,692	548,627
Consumer loans [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	24,170	23,822
Consumer loans [Member] | Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	552,255	538,723
Consumer loans [Member] | Pass [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	24,007	23,586
Consumer loans [Member] | Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	2,970	2,795
Consumer loans [Member] | Special Mention [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	127	139
Consumer loans [Member] | Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	6,467	7,109
Consumer loans [Member] | Substandard [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	36	97
Consumer loans [Member] | Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Consumer loans [Member] | Doubtful [Member] | Other [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Consumer loans [Member] | Real estate [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	330,538	320,943
Consumer loans [Member] | Real estate [Member] | Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	324,421	314,586
Consumer loans [Member] | Real estate [Member] | Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	2,428	1,792
Consumer loans [Member] | Real estate [Member] | Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	3,689	4,565
Consumer loans [Member] | Real estate [Member] | Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Consumer loans [Member] | Home equity [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	167,146	165,937
Consumer loans [Member] | Home equity [Member] | Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	163,989	162,626
Consumer loans [Member] | Home equity [Member] | Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	415	864
Consumer loans [Member] | Home equity [Member] | Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	2,742	2,447
Consumer loans [Member] | Home equity [Member] | Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Consumer loans [Member] | Construction [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	39,838	37,925
Consumer loans [Member] | Construction [Member] | Pass [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans	39,838	37,925
Consumer loans [Member] | Construction [Member] | Special Mention [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Consumer loans [Member] | Construction [Member] | Substandard [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans
Consumer loans [Member] | Construction [Member] | Doubtful [Member]
Outstanding commercial and consumer loans by risk category
Outstanding consumer loans

X

- Definition

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

+ References

No definition available.

+ Details

Name:	sfst_LoanAndLeasesReceivableBeforeFeesGross
Namespace Prefix:	sfst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Details

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

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sfst_OtherConsumerMember
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=us-gaap_RealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
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: