XML 51 R40.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Loans and Allowance for Loan Losses (Details 9) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | $ 15,444 | $ 14,317 | $ 14,855 | $ 13,629
Provision for loan losses | 500 | 825 | 1,500 | 2,025
Loan charge-offs | (399) | (683) | (962) | (1,462)
Loan recoveries | 34 | 19 | 186 | 286
Net loan charge-offs | (365) | (664) | (776) | (1,176)
Balance, end of period | $ 15,579 | $ 14,478 | $ 15,579 | $ 14,478
Net charge-offs to average loans (annualized) | 0.11% | 0.24% | 0.08% | 0.15%
Allowance for loan losses to gross loans | 1.17% | 1.30% |  |
Allowance for loan losses to nonperforming loans | 278.05% | 258.30% |  |
Commercial [Member] | Owner occupied RE [Member] |  |  |  |
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | $ 2,964 | $ 2,797 | $ 2,843 | $ 2,347
Provision for loan losses | (141) | 98 | (20) | 553
Loan charge-offs |  |  |  | (5)
Loan recoveries |  |  |  |
Net loan charge-offs |  |  |  | (5)
Balance, end of period | 2,823 | 2,895 | 2,823 | 2,895
Commercial [Member] | Non-owner occupied RE [Member] |  |  |  |
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | 2,981 | 3,011 | 2,778 | 3,187
Provision for loan losses | 634 | 47 | 1,257 | (81)
Loan charge-offs |  | (25) | (433) | (100)
Loan recoveries | 1 | 5 | 14 | 32
Net loan charge-offs | 1 | (20) | (419) | (68)
Balance, end of period | 3,616 | 3,038 | 3,616 | 3,038
Commercial [Member] | Construction [Member] |  |  |  |
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | 350 | 350 | 295 | 338
Provision for loan losses | (122) | (53) | (67) | 2
Loan charge-offs |  |  |  | (43)
Loan recoveries |  |  |  |
Net loan charge-offs |  |  |  | (43)
Balance, end of period | 228 | 297 | 228 | 297
Commercial [Member] | Business [Member] |  |  |  |
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | 3,857 | 4,019 | 4,123 | 3,800
Provision for loan losses | 213 | 337 | 31 | 666
Loan charge-offs | (388) | (515) | (518) | (862)
Loan recoveries | 31 | 13 | 77 | 250
Net loan charge-offs | (357) | (502) | (441) | (612)
Balance, end of period | 3,713 | 3,854 | 3,713 | 3,854
Consumer [Member] | Real estate [Member] |  |  |  |
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | 3,061 | 2,302 | 2,780 | 2,070
Provision for loan losses | 160 | 215 | 359 | 641
Loan charge-offs |  |  |  | (194)
Loan recoveries | 1 |  | 83 |
Net loan charge-offs | 1 |  | 83 | (194)
Balance, end of period | 3,222 | 2,517 | 3,222 | 2,517
Consumer [Member] | Home equity [Member] |  |  |  |
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | 1,608 | 1,296 | 1,475 | 1,202
Provision for loan losses | (196) | 119 | (75) | 236
Loan charge-offs |  | (43) |  | (66)
Loan recoveries |  |  | 12 |
Net loan charge-offs |  | (43) | 12 | (66)
Balance, end of period | 1,412 | 1,372 | 1,412 | 1,372
Consumer [Member] | Construction [Member] |  |  |  |
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | 328 | 212 | 252 | 313
Provision for loan losses | (47) | (5) | 29 | (106)
Loan charge-offs |  |  |  |
Loan recoveries |  |  |  |
Net loan charge-offs |  |  |  |
Balance, end of period | 281 | 207 | 281 | 207
Consumer [Member] | Other [Member] |  |  |  |
Summary of activity related to our allowance for loan losses |  |  |  |
Balance, beginning of period | 295 | 330 | 309 | 372
Provision for loan losses | (1) | 67 | (14) | 114
Loan charge-offs | (11) | (100) | (11) | (192)
Loan recoveries | 1 | 1 |  | 4
Net loan charge-offs | (10) | (99) | (11) | (188)
Balance, end of period | $ 284 | $ 298 | $ 284 | $ 298

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 Allowance for loan losses as a percentage of gross loans. + References No definition available. + Details
Name: | sfst_AllowanceForLoanLossesAsPercentageOfGrossLoans
Namespace Prefix: | sfst_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Allowance for credit losses as a percentage of nonperforming loans. + References No definition available. + Details
Name: | sfst_AllowanceForLoanLossesAsPercentageOfNonperformingLoans
Namespace Prefix: | sfst_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net loan charge offs annualized as a percentage of average total loans. + References No definition available. + Details
Name: | sfst_NetLoanChargeOffsAnnualizedAsPercentageOfAverageLoans
Namespace Prefix: | sfst_
Data Type: | num:percentItemType
Balance Type: | na
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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&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 the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from recoveries of amounts previously written off or reestablishment of reserves that had previously been utilized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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_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: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ConsumerLoanMember
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=sfst_OtherConsumerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |