XML 81 R68.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Loans and Allowance for Loan Losses (Details 9) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Balance, beginning of period | $ 15,523 | $ 14,855 | $ 13,629
Provision for loan losses | 1,900 | 2,000 | 2,300
Total loan charge-offs | (2,146) | (1,638) | (1,648)
Loan recoveries | 485 | 306 | 574
Net loan charge-offs | (1,661) | (1,332) | (1,074)
Balance, end of period | 15,762 | 15,523 | 14,855
Commercial [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Balance, beginning of period | 9,937 | 10,039 |
Total loan charge-offs | (1,127) | (1,227) | (1,178)
Loan recoveries | 361 | 205 | 558
Balance, end of period | 10,768 | 9,937 | 10,039
Commercial [Member] | Owner occupied RE [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Total loan charge-offs |  |  | (5)
Loan recoveries |  |  |
Commercial [Member] | Non-owner occupied RE [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Total loan charge-offs | (432) | (589) | (100)
Loan recoveries | 132 | 119 | 155
Commercial [Member] | Business [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Total loan charge-offs | (695) | (638) | (1,031)
Loan recoveries | 229 | 86 | 403
Commercial [Member] | Construction [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Total loan charge-offs |  |  | (42)
Loan recoveries |  |  |
Consumer [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Balance, beginning of period | 5,586 | 4,816 |
Total loan charge-offs | (1,019) | (411) | (470)
Loan recoveries | 124 | 101 | 16
Balance, end of period | 4,994 | 5,586 | 4,816
Consumer [Member] | Other [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Total loan charge-offs | (53) | (11) | (210)
Loan recoveries | 4 | 2 | 5
Consumer [Member] | Real estate [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Total loan charge-offs | (749) |  | (194)
Loan recoveries | 5 | 86 | 10
Consumer [Member] | Home equity [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Total loan charge-offs | (217) | (400) | (66)
Loan recoveries | 115 | 13 | 1
Consumer [Member] | Construction [Member] |  |  |
Financing Receivable, Allowance For Credit Losses [Roll Forward] |  |  |
Total loan charge-offs |  |  |
Loan recoveries |  |  |

X
- Definition Allowance for loan and lease losses write offs net of recoveries. + References No definition available. + Details
Name: | sfst_AllowanceForLoanAndLeaseLossesWriteOffsNetOfRecoveries
Namespace Prefix: | sfst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_ProvisionForLoanLeaseAndOtherLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase in valuation and qualifying accounts and reserves from recovery of amount previously written off or reestablishment of reserve previously utilized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesRecoveries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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: |