XML 56 R42.htm IDEA: XBRL DOCUMENT
v3.20.1

Loans and Allowance for Loan Losses (Schedule of Aging of Past Due Loans) (Details) - Consumer Loan [Member] - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Outstanding commercial and consumer loans which include loans on nonaccrual status |  |
Current | $ 676,643 | $ 642,617
30-59 days past due | 2,091 | 1,251
60-89 days past due | 886 | 118
Greater than 90 days | 1,211 | 1,201
Total consumer loans | 680,831 | 645,187
Other Consumer [Member] |  |
Outstanding commercial and consumer loans which include loans on nonaccrual status |  |
Current | 24,790 | 25,650
30-59 days past due | 5 | 83
60-89 days past due |  |
Greater than 90 days |  |
Total consumer loans | 24,795 | 25,733
Real Estate [Member] |  |
Outstanding commercial and consumer loans which include loans on nonaccrual status |  |
Current | 426,127 | 396,445
30-59 days past due | 559 | 799
60-89 days past due |  |
Greater than 90 days | 1,011 | 1,001
Total consumer loans | 427,697 | 398,245
Home Equity Loan [Member] |  |
Outstanding commercial and consumer loans which include loans on nonaccrual status |  |
Current | 180,486 | 179,051
30-59 days past due | 1,527 | 369
60-89 days past due | 886 | 118
Greater than 90 days | 200 | 200
Total consumer loans | 183,099 | 179,738
Construction Loans [Member] |  |
Outstanding commercial and consumer loans which include loans on nonaccrual status |  |
Current | 45,240 | 41,471
30-59 days past due |  |
60-89 days past due |  |
Greater than 90 days |  |
Total consumer loans | $ 45,240 | $ 41,471

X
- Definition Financing receivable recorded investment past due one. + References No definition available. + Details
Name: | sfst_FinancingReceivableRecordedInvestmentPastDueOne
Namespace Prefix: | sfst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivable recorded investment past due two. + References No definition available. + Details
Name: | sfst_FinancingReceivableRecordedInvestmentPastDueTwo
Namespace Prefix: | sfst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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: | us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable not past due. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable past due. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_RealEstateMember
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: |