XML 81 R67.htm IDEA: XBRL DOCUMENT v3.22.0.1

Loans and Allowance for Loan Losses (Details 7) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Summary of key information for impaired loans
Unpaid Principal Balance	$ 9,344	$ 14,993
Impaired loans	8,163	12,962
Impaired loans with no related allowance for loan losses	5,263	7,824
Impaired loans with related allowance for loan losses	2,900	5,138
Related allowance for loan losses	836	1,709
Commercial [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	4,377	7,998
Impaired loans	3,435	6,425
Impaired loans with no related allowance for loan losses	1,531	2,620
Impaired loans with related allowance for loan losses	1,904	3,805
Related allowance for loan losses	623	1,339
Commercial [Member] | Owner occupied RE [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	1,261	1,753
Impaired loans	1,261	1,649
Impaired loans with no related allowance for loan losses	1,261	1,497
Impaired loans with related allowance for loan losses		152
Related allowance for loan losses		76
Commercial [Member] | Non-owner occupied RE [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	2,012	3,212
Impaired loans	1,070	2,188
Impaired loans with no related allowance for loan losses	270	705
Impaired loans with related allowance for loan losses	800	1,483
Related allowance for loan losses	171	366
Commercial [Member] | Business [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	1,104	2,892
Impaired loans	1,104	2,449
Impaired loans with no related allowance for loan losses		279
Impaired loans with related allowance for loan losses	1,104	2,170
Related allowance for loan losses	452	897
Commercial [Member] | Construction [Member]
Summary of key information for impaired loans
Unpaid Principal Balance		141
Impaired loans		139
Impaired loans with no related allowance for loan losses		139
Impaired loans with related allowance for loan losses
Related allowance for loan losses
Consumer [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	4,967	6,995
Impaired loans	4,728	6,537
Impaired loans with no related allowance for loan losses	3,732	5,204
Impaired loans with related allowance for loan losses	996	1,333
Related allowance for loan losses	213	370
Consumer [Member] | Other [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	123	135
Impaired loans	123	135
Impaired loans with no related allowance for loan losses
Impaired loans with related allowance for loan losses	123	135
Related allowance for loan losses	14	17
Consumer [Member] | Construction [Member]
Summary of key information for impaired loans
Unpaid Principal Balance
Impaired loans
Impaired loans with no related allowance for loan losses
Impaired loans with related allowance for loan losses
Related allowance for loan losses
Consumer [Member] | Real estate [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	2,638	4,362
Impaired loans	2,561	4,031
Impaired loans with no related allowance for loan losses	1,743	3,108
Impaired loans with related allowance for loan losses	818	923
Related allowance for loan losses	144	190
Consumer [Member] | Home equity [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	2,206	2,498
Impaired loans	2,044	2,371
Impaired loans with no related allowance for loan losses	1,989	2,096
Impaired loans with related allowance for loan losses	55	275
Related allowance for loan losses	$ 55	$ 163

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

+ Details

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

X

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

+ Details

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

X

- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

+ Details

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

X

- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

+ Details

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

X

- Details

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

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sfst_BusinessLoanMember
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_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_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: