XML 89 R74.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Federal Home Loan Bank Advances and Other Borrowings (Details) - Schedule of terms and maturities of advances outstanding - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Variable Interest Entity [Line Items] |  |
Total FHLB advances outstanding amount | $ 240,000 | $ 275,000
Total FHLB advances outstanding rate | 3.74% | 3.89%
Federal Home Loan Bank Advances [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | Feb. 29, 2024 |
Total FHLB advances outstanding amount |  | $ 35,000
Total FHLB advances outstanding rate |  | 5.57%
Federal Home Loan Bank Advances One [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | Apr. 28, 2028 |
Total FHLB advances outstanding amount | $ 40,000 | $ 40,000
Total FHLB advances outstanding rate | 3.51% | 3.51%
Federal Home Loan Bank Advances Two [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | May 15, 2028 |
Total FHLB advances outstanding amount |  | $ 35,000
Total FHLB advances outstanding rate |  | 3.13%
Federal Home Loan Bank Advances Three [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | Jun. 28, 2028 |
Total FHLB advances outstanding amount | $ 40,000 | $ 40,000
Total FHLB advances outstanding rate | 3.54% | 3.54%
Federal Home Loan Bank Advances Four [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | Jul. 10, 2028 |
Total FHLB advances outstanding amount |  | $ 45,000
Total FHLB advances outstanding rate |  | 3.78%
Federal Home Loan Bank Advances Five [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | Jul. 10, 2028 |
Total FHLB advances outstanding amount | $ 40,000 | $ 40,000
Total FHLB advances outstanding rate | 3.87% | 3.87%
Federal Home Loan Bank Advances Six [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | Jul. 10, 2028 |
Total FHLB advances outstanding amount | $ 40,000 | $ 40,000
Total FHLB advances outstanding rate | 3.96% | 3.96%
Federal Home Loan Bank Advances Seven [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | May 15, 2029 |
Total FHLB advances outstanding amount | $ 35,000 |
Total FHLB advances outstanding rate | 3.90% |
Federal Home Loan Bank Advances Eight [Member] |  |
Variable Interest Entity [Line Items] |  |
Maturity | Jul. 10, 2029 |
Total FHLB advances outstanding amount | $ 45,000 |
Total FHLB advances outstanding rate | 3.69% |

X
- References No definition available. + Details
Name: | SFST_FederalHomeLoanBankAdvancesMaturityDate
Namespace Prefix: | SFST_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 + Details
Name: | us-gaap_AdvancesFromFederalHomeLoanBanks
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Rate of interest applicable on advance from Federal Home Loan Bank (FHLBank). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
Name: | us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-25 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (bb) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-25 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PledgingPurposeAxis=us-gaap_FederalHomeLoanBankAdvancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgingPurposeAxis=SFST_FederalHomeLoanBankAdvancesOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgingPurposeAxis=SFST_FederalHomeLoanBankAdvancesTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgingPurposeAxis=SFST_FederalHomeLoanBankAdvancesThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgingPurposeAxis=SFST_FederalHomeLoanBankAdvancesFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgingPurposeAxis=SFST_FederalHomeLoanBankAdvancesFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgingPurposeAxis=SFST_FederalHomeLoanBankAdvancesSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgingPurposeAxis=SFST_FederalHomeLoanBankAdvancesSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PledgingPurposeAxis=SFST_FederalHomeLoanBankAdvancesEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |