$SFST
Southern First Bancshares Inc Stock $sfst

$sfst Overview Financials Valuation SEC Filings Company Website

2022 Q1 Form 10-K Financial Statement

#000120677422000604 Filed on March 04, 2022

Income Statement

Concept	2022 Q1	2021	2020 Q4
Revenue	$1.494M	$93.17M
YoY Change	-93.45%	-1.74%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$583.0K	$2.200M	$620.0K
YoY Change	6.0%	4.76%	24.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$1.300M	$5.435M
YoY Change	-15.58%	-63.79%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$10.30M	$60.80M	$11.10M
YoY Change	-22.64%	155.27%	21.84%
Income Tax	$2.331M	$14.09M	$2.500M
% Of Pretax Income	22.63%	23.18%	22.52%
Net Earnings	$7.970M	$46.71M	$8.600M
YoY Change	-23.11%	154.86%	19.44%
Net Earnings / Revenue	533.47%	50.14%
Basic Earnings Per Share	$1.00	$5.96
Diluted Earnings Per Share	$984.4K	$5.85	$1.097M
COMMON SHARES
Basic Shares Outstanding	7.977M shares	7.844M shares	7.738M shares
Diluted Shares Outstanding	8.096M shares	7.989M shares

Balance Sheet

Concept	2022 Q1	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$149.2M		$100.7M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$95.13M	$92.40M	$60.24M
YoY Change	54.18%	53.49%	3.01%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$10.64M	$8.400M	$9.500M
YoY Change	8.52%	-11.58%	120.93%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$3.073B	$2.926B	$2.483B
YoY Change	19.1%	17.84%	9.5%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$25.60M	$18.80M	$19.50M
YoY Change	34.03%	-3.59%	-2.99%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$25.60M	$18.80M	$19.50M
YoY Change	34.03%	-3.59%	-2.99%
LONG-TERM LIABILITIES
Long-Term Debt	$36.13M	$36.10M	$36.00M
YoY Change	0.37%	0.28%	0.28%
Other Long-Term Liabilities	$24.21M	$28.90M	$31.00M
YoY Change	-8.65%	-6.77%	61.46%
Total Long-Term Liabilities	$60.34M	$65.00M	$67.00M
YoY Change	-3.45%	-2.99%	21.6%
TOTAL LIABILITIES
Total Short-Term Liabilities	$25.60M	$18.80M	$19.50M
Total Long-Term Liabilities	$60.34M	$65.00M	$67.00M
Total Liabilities	$2.794B	$2.648B	$2.254B
YoY Change	19.39%	17.45%	9.36%
SHAREHOLDERS EQUITY
Retained Earnings			$119.1M
YoY Change			18.19%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$278.5M	$277.9M	$228.3M
YoY Change
Total Liabilities & Shareholders Equity	$3.073B	$2.926B	$2.483B
YoY Change	19.1%	17.84%	9.5%

Cashflow Statement

Concept	2022 Q1	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$7.970M	$46.71M	$8.600M
YoY Change	-23.11%	154.86%	19.44%
Depreciation, Depletion And Amortization	$583.0K	$2.200M	$620.0K
YoY Change	6.0%	4.76%	24.0%
Cash From Operating Activities	$7.867M	$78.07M	$23.88M
YoY Change	-25.57%	278.63%	23.22%
INVESTING ACTIVITIES
Capital Expenditures	-$5.869M	$26.51M	-$3.580M
YoY Change	-324.95%	264.33%	364.94%
Acquisitions
YoY Change
Other Investing Activities	-$164.9M	-$384.1M	-$69.59M
YoY Change	259.53%	71.87%	-20.55%
Cash From Investing Activities	-$170.8M	-$410.6M	-$73.18M
YoY Change	252.27%	77.94%	-17.19%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	144.9M	$399.1M	-12.93M
YoY Change	56.56%	118.05%	-120.76%
NET CHANGE
Cash From Operating Activities	7.867M	$78.07M	23.88M
Cash From Investing Activities	-170.8M	-$410.6M	-73.18M
Cash From Financing Activities	144.9M	$399.1M	-12.93M
Net Change In Cash	-17.99M	$66.52M	-62.23M
YoY Change	-132.92%	-345.21%	827.42%
FREE CASH FLOW
Cash From Operating Activities	$7.867M	$78.07M	$23.88M
Capital Expenditures	-$5.869M	$26.51M	-$3.580M
Free Cash Flow	$13.74M	$51.56M	$27.46M
YoY Change	72.56%	286.42%	36.28%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021	sfst	Federal Home Loan Bank Advances Maturity Date FederalHomeLoanBankAdvancesMaturityDate	2021-12-31
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	000-27719
CY2021	dei	Entity Registrant Name EntityRegistrantName	Southern First Bancshares, Inc.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	SC
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	58-2459561
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	100 Verdae Boulevard
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Greenville
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	SC
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CY2021	dei	City Area Code CityAreaCode	864
CY2021	dei	Local Phone Number LocalPhoneNumber	679-9000
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CY2021	dei	Auditor Name AuditorName	Elliott Davis, LLC
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7621000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	46711000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	18328000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	27858000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.96
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.37
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.70
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.85
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.34
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.58
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7843692	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7718615	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7528283	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7988980	shares
CY2020	sfst	Write Down Of Other Real Estate Owned WriteDownOfOtherRealEstateOwned	-1029000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	46711000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	18328000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	27858000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-2232000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1675000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1510000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-467000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	352000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	317000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-3000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	3000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	727000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-1000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	1000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	153000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1763000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1321000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	619000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	44948000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	19649000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	28477000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	173916000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	27858000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1769000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	428000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1270000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	619000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	205860000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	18328000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1388000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	380000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1017000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1321000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	228294000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	46711000	USD
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	3012000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	499000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1148000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1763000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	277901000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	46711000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	18328000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	27858000	USD
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-12400000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	29600000	USD
CY2019	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2300000	USD
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2319000	USD
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2190000	USD
CY2019	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1915000	USD
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-935000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-710000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-432000	USD
CY2021	sfst	Write Down Of Other Real Estate Owned WriteDownOfOtherRealEstateOwned		USD
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	10000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	196000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment		USD
CY2021	sfst	Operating Lease Payment OperatingLeasePayment	605000	USD
CY2020	sfst	Operating Lease Payment OperatingLeasePayment	180000	USD
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	13676000	USD
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	21186000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	10219000	USD
CY2021	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	486145000	USD
CY2020	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	594289000	USD
CY2019	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	380632000	USD
CY2021	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	546522000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	582264000	USD
CY2019	sfst	Operating Lease Payment OperatingLeasePayment	585000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	1647000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	1397000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	1698000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	373046000	USD
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1231000	USD
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1091000	USD
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1001000	USD
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-1589000	USD
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2741000	USD
CY2019	sfst	Write Down Of Other Real Estate Owned WriteDownOfOtherRealEstateOwned		USD
CY2021	sfst	Loss On Sale Of Other Real Estate Owned LossOnSaleOfOtherRealEstateOwned	376000	USD
CY2021	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-3000	USD
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	3000	USD
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	727000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	420000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2126000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4670000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	600000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-11302000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	9097000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	4074000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	78069000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	20619000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	18309000	USD
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	348718000	USD
CY2020	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	203632000	USD
CY2019	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	267613000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	26509000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7276000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8431000	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	49393000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	50854000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	39930000	USD
CY2021	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	2250000	USD
CY2020	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	2338000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	4675000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	20673000	USD
CY2021	sfst	Other Real Estate Acquired In Settlement Of Loans OtherRealEstateAcquiredInSettlementOfLoans	367000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2895000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment		USD
CY2021	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	1159000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	24784000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	19212000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Other Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments	1861000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Other Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments	5651000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Other Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfOtherInvestments	1848000	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt		USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt		USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	29006000	USD
CY2021	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	7500000	USD
CY2020	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies		USD
CY2019	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	5000000	USD
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	50000	USD
CY2020	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans		USD
CY2019	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans		USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-410627000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-230770000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-275583000	USD
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	421068000	USD
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	266634000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	227988000	USD
CY2021	sfst	Increase Decrease In Federal Home Loan Bank Advances And Other Borrowings IncreaseDecreaseInFederalHomeLoanBankAdvancesAndOtherBorrowings	-25000000	USD
CY2020	sfst	Increase Decrease In Federal Home Loan Bank Advances And Other Borrowings IncreaseDecreaseInFederalHomeLoanBankAdvancesAndOtherBorrowings	-85000000	USD
CY2019	sfst	Increase Decrease In Federal Home Loan Bank Advances And Other Borrowings IncreaseDecreaseInFederalHomeLoanBankAdvancesAndOtherBorrowings	60000000	USD
CY2021	us-gaap	Proceeds From Subordinated Short Term Debt ProceedsFromSubordinatedShortTermDebt		USD
CY2020	us-gaap	Proceeds From Subordinated Short Term Debt ProceedsFromSubordinatedShortTermDebt		USD
CY2019	us-gaap	Proceeds From Subordinated Short Term Debt ProceedsFromSubordinatedShortTermDebt	22460000	USD
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3012000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1388000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1769000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	399080000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	183022000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	312217000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	66522000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-27129000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	54943000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	100687000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	127816000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72873000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	167209000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	100687000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	127816000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	6402000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	16312000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	25156000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	21652000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	2741000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	7883000	USD
CY2020	sfst	Other Real Estate Acquired In Settlement Of Loans OtherRealEstateAcquiredInSettlementOfLoans	2198000	USD
CY2019	sfst	Other Real Estate Acquired In Settlement Of Loans OtherRealEstateAcquiredInSettlementOfLoans		USD
CY2021	sfst	Unrealized Gain Loss On Securities Net Of Income Taxes UnrealizedGainLossOnSecuritiesNetOfIncomeTaxes	-1763000	USD
CY2020	sfst	Unrealized Gain Loss On Securities Net Of Income Taxes UnrealizedGainLossOnSecuritiesNetOfIncomeTaxes	1323000	USD
CY2019	sfst	Unrealized Gain Loss On Securities Net Of Income Taxes UnrealizedGainLossOnSecuritiesNetOfIncomeTaxes	1193000	USD
CY2021	sfst	Operating Leases OperatingLeases	10221000	USD
CY2020	sfst	Operating Leases OperatingLeases	2115000	USD
CY2019	sfst	Operating Leases OperatingLeases	21459000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:left; margin-top:11pt; margin-bottom:0pt; "> <span style="font-style:italic; ">Use of Estimates</span></p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amount of income and expenses during the reporting periods. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, derivatives, real estate acquired in settlement of loans, fair value of financial instruments, evaluating other-than-temporary-impairment of investment securities and valuation of deferred tax assets. </p>
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:left; margin-top:11pt; margin-bottom:0pt; "> <span style="font-style:italic; ">Risks and Uncertainties</span></p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">In the normal course of its business, the Company encounters two significant types of risks: economic and regulatory. There are three main components of economic risk: interest rate risk, credit risk and market risk. The Company is subject to interest rate risk to the degree that its interest-bearing liabilities mature or reprice at different speeds, or on different bases, than its interest-earning assets. Credit risk is the risk of default within the Company’s loan portfolio that results from borrowers’ inability or unwillingness to make contractually required payments. Market risk reflects changes in the value of collateral underlying loans receivable and the valuation of real estate held by the Company.</p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">The Company is subject to the regulations of various governmental agencies. These regulations can and do change significantly from period to period. The Company also undergoes periodic examinations by the regulatory agencies, which may subject it to changes with respect to valuation of assets, amount of required loan loss allowance and operating restrictions resulting from the regulators’ judgments based on information available to them at the time of their examinations.</p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">The Bank makes loans to individuals and businesses in the Upstate, Midlands, and Lowcountry regions of South Carolina as well as the Triangle, Triad and Charlotte regions of North Carolina and Atlanta, Georgia for various personal and commercial purposes. The Bank’s loan portfolio has a concentration of real estate loans. As of December 31, 2021 and 2020, real estate loans represented 85.5% and 84.6%, respectively, of total loans. However, borrowers’ ability to repay their loans is not dependent upon any specific economic sector.</p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">The impact of the coronavirus (COVID-19) pandemic is fluid and continues to evolve, adversely affecting many of the Bank’s clients. The unprecedented and rapid spread of COVID-19 and its associated impacts on trade (including supply chains and export levels), travel, employee productivity, unemployment, consumer spending, and other economic activities has resulted in less economic activity, lower equity market valuations and significant volatility and disruption in financial markets, and has had an adverse effect on the Company’s business, financial condition and results of operations. The ultimate extent of the impact of the COVID-19 pandemic on our business, financial condition and results of operations is currently uncertain and will depend on various developments and other factors, including governmental and private sector initiatives, the effect of the recent rollout of vaccinations for the virus, whether such vaccinations will be effective against any resurgence of the virus, including any new strains, and the ability for customers and businesses to return to their pre-pandemic routine.</p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:12pt; text-align:justify; margin-bottom:0pt; "/> <div> <div style="width:100%; clear:both;"> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:center; ">75</p> </div><hr style="border-top:2.0pt solid #808080;"/><div style="page-break-after:always;"/> </div> <p style="font-weight:bold; font-size:10pt; font-family:Arial, Helvetica, sans-serif"><a href="#toc">Table of Contents</a></p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">The Company’s business, financial condition and results of operations generally rely upon the ability of the Bank’s borrowers to repay their loans, the value of collateral underlying the Bank’s secured loans, and demand for loans and other products and services the Bank offers, which are highly dependent on the business environment in the Bank’s primary markets where it operates and in the United States as a whole. </p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">On March 3, 2020, the Federal Reserve reduced the target federal funds rate by 50 basis points, followed by an additional reduction of 100 basis points on March 16, 2020. These reductions in interest rates and other effects of the COVID-19 pandemic have had, and are expected to continue to have, possibly materially, an adverse effect on Company’s business, financial condition and results of operations. For instance, the pandemic has had negative effects on the Bank’s interest income, provision for loan losses, and certain transaction-based line items of noninterest income. Other financial impacts could occur though such potential impact is unknown at this time. </p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">As of December 31, 2021, the Company’s and the Bank’s capital ratios were in excess of all regulatory requirements. While management believes that we have sufficient capital to withstand an extended economic recession brought about by the COVID-19 pandemic, our reported and regulatory capital ratios could be adversely impacted by further credit losses. </p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">The Company maintains access to multiple sources of liquidity, including a $15.0 million holding company line of credit with another bank which could be used to support capital ratios at the subsidiary bank. As of December 31, 2021, the $15.0 million line was unused. </p>
CY2021Q4	sfst	Real Estate Loan Percentage Of Aggregate Loan RealEstateLoanPercentageOfAggregateLoan	0.855	pure
CY2020Q4	sfst	Real Estate Loan Percentage Of Aggregate Loan RealEstateLoanPercentageOfAggregateLoan	0.846	pure
CY2020Q1	sfst	Federal Reserve Reduced Target Federal Funds Rate Basis Point FederalReserveReducedTargetFederalFundsRateBasisPoint	0.0050	pure
CY2020Q1	sfst	Federal Reserve Reduced Target Federal Funds Rate Basis Point FederalReserveReducedTargetFederalFundsRateBasisPoint	0.0100	pure
CY2021Q4	us-gaap	Line Of Credit LineOfCredit	15000000.0	USD
CY2021Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	5200000	USD
CY2020Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	12600000	USD
CY2021	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:left; margin-top:11pt; margin-bottom:0pt; "> <span style="font-style:italic; ">Reclassifications</span></p> <p style="font-family:Arial, Helvetica, sans-serif; font-size:10pt; text-align:justify; margin-top:11pt; margin-bottom:0pt; ">Certain amounts, previously reported, have been reclassified to state all periods on a comparable basis and had no effect on shareholders’ equity or net income. </p>
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	121218000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	944000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1881000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	120281000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	93434000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1586000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	291000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	94729000	USD
CY2021	sfst	Proceeds From Sale Of Investment Securities ProceedsFromSaleOfInvestmentSecurities	770000	USD
CY2021	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	3000	USD
CY2020	sfst	Proceeds From Sale Of Investment Securities ProceedsFromSaleOfInvestmentSecurities	2000000.0	USD
CY2020	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	3000	USD
CY2021Q4	sfst	Number Of Investments In Continuous Unrealized Loss Position Less Than Twelve Months NumberOfInvestmentsInContinuousUnrealizedLossPositionLessThanTwelveMonths	43	Investments
CY2021Q4	sfst	Investments With Fair Market Value In Continuous Unrealized Loss Position Less Than Twelve Months InvestmentsWithFairMarketValueInContinuousUnrealizedLossPositionLessThanTwelveMonths	53000000.0	USD
CY2021Q4	sfst	Number Of Investments In Continuous Unrealized Loss Position Twelve Months Or Longer NumberOfInvestmentsInContinuousUnrealizedLossPositionTwelveMonthsOrLonger	28	Investments
CY2021Q4	sfst	Investments With Fair Market Value In Continuous Unrealized Loss Position Twelve Months Or Longer InvestmentsWithFairMarketValueInContinuousUnrealizedLossPositionTwelveMonthsOrLonger	27600000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	384000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	387000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost		USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue		USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	7429000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	7363000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	4957000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	5015000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	27298000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	26953000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	17345000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	17575000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	86107000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	85578000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	71132000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	72139000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	121218000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	120281000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	93434000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	94729000	USD
CY2021Q4	sfst	Number Of Investments In Continuous Unrealized Loss Position Less Than Twelve Months NumberOfInvestmentsInContinuousUnrealizedLossPositionLessThanTwelveMonths	43	Investments
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	53041000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	995000	USD
CY2021Q4	sfst	Number Of Investments In Continuous Unrealized Loss Position Twelve Months Or Longer NumberOfInvestmentsInContinuousUnrealizedLossPositionTwelveMonthsOrLonger	28	Investments
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	27586000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	886000	USD
CY2021Q4	sfst	Number Of Investments In Continuous Unrealized Loss Position NumberOfInvestmentsInContinuousUnrealizedLossPosition	71	Investments
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	80627000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1881000	USD
CY2020Q4	sfst	Number Of Investments In Continuous Unrealized Loss Position Less Than Twelve Months NumberOfInvestmentsInContinuousUnrealizedLossPositionLessThanTwelveMonths	26	Investments
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	28663000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	174000	USD
CY2020Q4	sfst	Number Of Investments In Continuous Unrealized Loss Position Twelve Months Or Longer NumberOfInvestmentsInContinuousUnrealizedLossPositionTwelveMonthsOrLonger	10	Investments
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	9466000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	117000	USD
CY2020Q4	sfst	Number Of Investments In Continuous Unrealized Loss Position NumberOfInvestmentsInContinuousUnrealizedLossPosition	36	Investments
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	38129000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	291000	USD
CY2020Q4	us-gaap	Investment In Federal Home Loan Bank Stock Fair Value Disclosure InvestmentInFederalHomeLoanBankStockFairValueDisclosure	3103000	USD
CY2021Q4	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	2377000	USD
CY2020Q4	us-gaap	Certificates Of Deposit At Carrying Value CertificatesOfDepositAtCarryingValue	129000	USD
CY2021Q4	sfst	Investment In Trust Preferred Subsidiaries InvestmentInTrustPreferredSubsidiaries	403000	USD
CY2020Q4	sfst	Investment In Trust Preferred Subsidiaries InvestmentInTrustPreferredSubsidiaries	403000	USD
CY2021Q4	us-gaap	Other Investments OtherInvestments	4021000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2142867000	USD
CY2021Q4	us-gaap	Investment In Federal Home Loan Bank Stock Fair Value Disclosure InvestmentInFederalHomeLoanBankStockFairValueDisclosure	1241000	USD
CY2020Q4	sfst	Loans And Leases Receivable Net Of Deferred Income Percentage LoansAndLeasesReceivableNetOfDeferredIncomePercentage	1.000	pure
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	30408000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	3635000	USD
CY2021Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	13600000	USD
CY2020Q4	us-gaap	Mortgages Held For Sale Fair Value Disclosure MortgagesHeldForSaleFairValueDisclosure	60200000	USD
CY2021Q4	sfst	Real Estate Loan Percentage Of Aggregate Loan RealEstateLoanPercentageOfAggregateLoan	0.855	pure
CY2021Q4	sfst	Commercial Loans Percentage Of Aggregate Real Estate Loan CommercialLoansPercentageOfAggregateRealEstateLoan	0.573	pure
CY2021Q4	sfst	Consumer Loans Percentage Of Aggregate Real Estate Loan ConsumerLoansPercentageOfAggregateRealEstateLoan	0.427	pure
CY2021Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	5000000.0	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	3900000	USD
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2489877000	USD
CY2021Q4	sfst	Loans And Leases Receivable Net Of Deferred Income Percentage LoansAndLeasesReceivableNetOfDeferredIncomePercentage	1.000	pure
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	44149000	USD
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2459469000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2098718000	USD
CY2021Q4	us-gaap	Loans Receivable With Variable Rates Of Interest1 LoansReceivableWithVariableRatesOfInterest1	376805000	USD
CY2020Q4	us-gaap	Loans Receivable With Variable Rates Of Interest1 LoansReceivableWithVariableRatesOfInterest1	400506000	USD
CY2021Q4	us-gaap	Loans Receivable With Fixed Rates Of Interest1 LoansReceivableWithFixedRatesOfInterest1	2113072000	USD
CY2020Q4	us-gaap	Loans Receivable With Fixed Rates Of Interest1 LoansReceivableWithFixedRatesOfInterest1	1742361000	USD
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2489877000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2142867000	USD
CY2021Q4	sfst	Part Of Loans Of Thirty Days Or More Past Due As Percentage Of Aggregate Loan Portfolio PartOfLoansOfThirtyDaysOrMorePastDueAsPercentageOfAggregateLoanPortfolio	0.0009	pure
CY2020Q4	sfst	Part Of Loans Of Thirty Days Or More Past Due As Percentage Of Aggregate Loan Portfolio PartOfLoansOfThirtyDaysOrMorePastDueAsPercentageOfAggregateLoanPortfolio	0.0017	pure
CY2020Q4	sfst	Nonaccruing Troubled Debt Restructurings NonaccruingTroubledDebtRestructurings	3509000	USD
CY2021Q4	sfst	Nonaccruing Troubled Debt Restructurings NonaccruingTroubledDebtRestructurings	2952000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	5138000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1939000	USD
CY2020Q4	sfst	Nonperforming Assets As Percentage Of Gross Loans NonperformingAssetsAsPercentageOfGrossLoans	0.0043	pure
CY2021Q4	sfst	Loans Over Ninety Days Past Due LoansOverNinetyDaysPastDue	554000	USD
CY2020Q4	sfst	Loans Over Ninety Days Past Due LoansOverNinetyDaysPastDue	2296000	USD
CY2021Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing		USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1709000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing		USD
CY2021Q4	sfst	Accruing Troubled Debt Restructurings AccruingTroubledDebtRestructurings	3299000	USD
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12522000	USD
CY2021Q4	sfst	Nonaccrual Loans Including Nonaccruing Troubled Debt Restructurings NonaccrualLoansIncludingNonaccruingTroubledDebtRestructurings	4864000	USD
CY2020Q4	sfst	Nonaccrual Loans Including Nonaccruing Troubled Debt Restructurings NonaccrualLoansIncludingNonaccruingTroubledDebtRestructurings	8069000	USD
CY2021Q4	us-gaap	Other Real Estate OtherRealEstate		USD
CY2020Q4	us-gaap	Other Real Estate OtherRealEstate	1169000	USD
CY2021Q4	sfst	Nonaccrual Loans And Other Real Estate NonaccrualLoansAndOtherRealEstate	4864000	USD
CY2020Q4	sfst	Nonaccrual Loans And Other Real Estate NonaccrualLoansAndOtherRealEstate	9238000	USD
CY2021Q4	sfst	Nonperforming Assets As Percentage Of Assets NonperformingAssetsAsPercentageOfAssets	0.0017	pure
CY2020Q4	sfst	Nonperforming Assets As Percentage Of Assets NonperformingAssetsAsPercentageOfAssets	0.0037	pure
CY2021Q4	sfst	Nonperforming Assets As Percentage Of Gross Loans NonperformingAssetsAsPercentageOfGrossLoans	0.0020	pure
CY2020Q4	sfst	Accruing Troubled Debt Restructurings AccruingTroubledDebtRestructurings	4893000	USD
CY2021	sfst	Foregone Interest Income On Non Accrual Loans ForegoneInterestIncomeOnNonAccrualLoans	55000	USD
CY2020	sfst	Foregone Interest Income On Non Accrual Loans ForegoneInterestIncomeOnNonAccrualLoans	61000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	9344000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	8163000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	5263000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	2900000	USD
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	836000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	14993000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	12962000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	7824000	USD
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	496000	USD
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	14643000	USD
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	812000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12259000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	640000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44149000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	16642000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	15762000	USD
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-12400000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	29600000	USD
CY2019	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	2300000	USD
CY2021	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	2166000	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3414000	USD
CY2019	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1515000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	825000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	1321000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	95000	USD
CY2021	sfst	Allowance For Loan And Lease Losses Write Offs Net Of Recoveries AllowanceForLoanAndLeaseLossesWriteOffsNetOfRecoveries	1341000	USD
CY2020	sfst	Allowance For Loan And Lease Losses Write Offs Net Of Recoveries AllowanceForLoanAndLeaseLossesWriteOffsNetOfRecoveries	2093000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2142867000	USD
CY2021	sfst	Number Of Month Payment Defaulted NumberOfMonthPaymentDefaulted	12 months
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	29600000	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3414000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	1321000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2129905000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44149000	USD
CY2019	sfst	Allowance For Loan And Lease Losses Write Offs Net Of Recoveries AllowanceForLoanAndLeaseLossesWriteOffsNetOfRecoveries	1420000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	30408000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44149000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	16642000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44149000	USD
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-12400000	USD
CY2021	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	2166000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	825000	USD
CY2021	sfst	Allowance For Loan And Lease Losses Write Offs Net Of Recoveries AllowanceForLoanAndLeaseLossesWriteOffsNetOfRecoveries	1341000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	30408000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	16642000	USD
CY2020	sfst	Allowance For Loan And Lease Losses Write Offs Net Of Recoveries AllowanceForLoanAndLeaseLossesWriteOffsNetOfRecoveries	2093000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44149000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	836000	USD
CY2021Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	8163000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	29572000	USD
CY2021Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2481714000	USD
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	30408000	USD
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2489877000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1709000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	12962000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	42440000	USD
CY2021Q4	sfst	Aggregate Number Of Loans Classified Under Troubled Debt Restructurings AggregateNumberOfLoansClassifiedUnderTroubledDebtRestructurings	14	Investments
CY2021Q4	sfst	Aggregate Sum Of Loans Classified As Troubled Debt Restructurings AggregateSumOfLoansClassifiedAsTroubledDebtRestructurings	6300000	USD
CY2020Q4	sfst	Aggregate Number Of Loans Classified Under Troubled Debt Restructurings AggregateNumberOfLoansClassifiedUnderTroubledDebtRestructurings	20	Investments
CY2020Q4	sfst	Aggregate Sum Of Loans Classified As Troubled Debt Restructurings AggregateSumOfLoansClassifiedAsTroubledDebtRestructurings	8400000	USD
CY2021Q4	sfst	Renewals Deemed Concession RenewalsDeemedConcession	3	Investments
CY2021Q4	sfst	Reduced Or Deferred Payments ReducedOrDeferredPayments		Investments
CY2021Q4	sfst	Converted To Interest Only ConvertedToInterestOnly		Investments
CY2021Q4	sfst	Maturity Date Extensions MaturityDateExtensions		Investments
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	3	Investments
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	440000	USD
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	443000	USD
CY2020Q4	sfst	Renewals Deemed Concession RenewalsDeemedConcession	5	Investments
CY2020Q4	sfst	Reduced Or Deferred Payments ReducedOrDeferredPayments		Investments
CY2020Q4	sfst	Converted To Interest Only ConvertedToInterestOnly		Investments
CY2020Q4	sfst	Maturity Date Extensions MaturityDateExtensions		Investments
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	5	Investments
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3132000	USD
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3132000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	15882000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	13703000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	65726000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	41468000	USD
CY2020	sfst	Number Of Month Payment Defaulted NumberOfMonthPaymentDefaulted	12 months
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	268739000	USD
CY2021Q4	sfst	Operating Lease Right Of Use Assets OperatingLeaseRightOfUseAssets	26644000	USD
CY2020Q4	sfst	Operating Lease Right Of Use Assets OperatingLeaseRightOfUseAssets	18768000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	92370000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	60236000	USD
CY2020Q4	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	180000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2200000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	2100000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y11M1D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y3M18D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0228	pure
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0270	pure
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	3000000.0	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	2400000	USD
CY2021Q4	sfst	Operating Lease Right Of Use Asset1 OperatingLeaseRightOfUseAsset1	26600000	USD
CY2021Q4	sfst	Lease Liabilities LeaseLiabilities	28000000.0	USD
CY2020Q4	sfst	Operating Lease Right Of Use Asset1 OperatingLeaseRightOfUseAsset1	18800000	USD
CY2020Q4	sfst	Lease Liabilities LeaseLiabilities	19500000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1974000	USD
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	1201099000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	1042745000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1990000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2046000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2096000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	24092000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	34137000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	6124000	USD
CY2021Q4	sfst	Operating Lease Liability1 OperatingLeaseLiability1	28013000	USD
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure		USD
CY2020Q4	us-gaap	Other Real Estate OtherRealEstate	1169000	USD
CY2019Q4	us-gaap	Other Real Estate OtherRealEstate		USD
CY2021	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	367000	USD
CY2020	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	2198000	USD
CY2021	us-gaap	Other Real Estate Disposals OtherRealEstateDisposals	1536000	USD
CY2020	us-gaap	Other Real Estate Disposals OtherRealEstateDisposals		USD
CY2021	sfst	Other Real Estate Write Downs OtherRealEstateWriteDowns		USD
CY2020	sfst	Other Real Estate Write Downs OtherRealEstateWriteDowns	-1029000	USD
CY2021Q4	us-gaap	Other Real Estate OtherRealEstate		USD
CY2020Q4	us-gaap	Other Real Estate OtherRealEstate	1169000	USD
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	768651000	USD
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	576610000	USD
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	401788000	USD
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	39696000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	27254000	USD
CY2021Q4	us-gaap	Time Deposits TimeDeposits	152592000	USD
CY2020Q4	us-gaap	Time Deposits TimeDeposits	227410000	USD
CY2021Q4	us-gaap	Deposits Deposits	2563826000	USD
CY2020Q4	us-gaap	Deposits Deposits	2142758000	USD
CY2021Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	84400000	USD
CY2020Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	130900000	USD
CY2020Q4	sfst	Time Deposits Obtained Outside Of Primary Market TimeDepositsObtainedOutsideOfPrimaryMarket	22000000.0	USD
CY2021	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	1100000	USD
CY2020	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	4600000	USD
CY2019	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	6900000	USD
CY2021Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks		USD
CY2021Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate		pure
CY2020Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	25000000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Interest Rate FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate	0.0036	pure
CY2021Q4	us-gaap	Line Of Credit Facility Fair Value Of Amount Outstanding LineOfCreditFacilityFairValueOfAmountOutstanding	15000000	USD
CY2021	us-gaap	Line Of Credit Facility Expiration Date1 LineOfCreditFacilityExpirationDate1	2023-12-20
CY2021	sfst	Description Of Wall Street Reform And Consumer Protection Act DescriptionOfWallStreetReformAndConsumerProtectionAct	Dodd-Frank Act prohibit institutions that had more than $15 billion in assets on December 31, 2009 from including trust preferred securities as Tier 1 capital beginning in 2013, with one-third phased out over the two years ending in 2015. Financial institutions with less than $15 billion in total assets, such as the Bank, may continue to include their trust preferred securities issued prior to May 19, 2010 in Tier 1 capital, but cannot include in Tier 1 capital trust preferred securities issued after such date.
CY2021	sfst	Percentage Of Loans Collateral By Real Estate PercentageOfLoansCollateralByRealEstate	86% of loans
CY2021Q4	us-gaap	Other Investments OtherInvestments	4021000	USD
CY2021Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	4021000	USD
CY2021Q4	sfst	Loans Receivable Carrying Amount LoansReceivableCarryingAmount	2451306000	USD
CY2021Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	2422621000	USD
CY2021Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	118500000	USD
CY2021Q4	sfst	Additional Borrowings Under Federal Home Loan Bank AdditionalBorrowingsUnderFederalHomeLoanBank	580700000	USD
CY2021Q4	us-gaap	Deposits Deposits	2563826000	USD
CY2021Q4	us-gaap	Deposits Fair Value Disclosure DepositsFairValueDisclosure	2327055000	USD
CY2021Q4	us-gaap	Subordinated Debt SubordinatedDebt	36106000	USD
CY2021Q4	us-gaap	Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	33936000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	3635000	USD
CY2020Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	3635000	USD
CY2020Q4	sfst	Loans Receivable Carrying Amount LoansReceivableCarryingAmount	2085756000	USD
CY2020Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	2060698000	USD
CY2020Q4	us-gaap	Deposits Deposits	2142758000	USD
CY2020Q4	us-gaap	Deposits Fair Value Disclosure DepositsFairValueDisclosure	2008317000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances FederalHomeLoanBankAdvances	25000000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Borrowings Fair Value Disclosure FederalHomeLoanBankBorrowingsFairValueDisclosure	24972000	USD
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	35998000	USD
CY2020Q4	us-gaap	Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	30371000	USD
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	9000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	318825	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	94885	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	46711000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	18328000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	27858000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.70
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.85
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.34
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	46711000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	18328000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	27858000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7843692	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7718615	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7528283	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	145288	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	105599	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	244261	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7988980	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7824214	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7772544	shares
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.96
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.37
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.58
CY2021	sfst	Employment Agreement Description EmploymentAgreementDescription	These agreements also include a) an incentive program, b) a stock option plan, c) a one-year non-compete agreement upon termination and a severance payment equal to one year of compensation.
CY2021Q4	sfst	Estimated Aggregate Commitment EstimatedAggregateCommitment	3500000	USD
CY2021	sfst	Agreement With Data Processor Expired AgreementWithDataProcessorExpired	2023
CY2021Q4	us-gaap	Construction Contractor Receivable Including Contract Retainage ConstructionContractorReceivableIncludingContractRetainage	30300000	USD
CY2021Q4	sfst	Construction Amount Paid ConstructionAmountPaid	21800000	USD
CY2021Q4	sfst	Agreegate Commitment Amount AgreegateCommitmentAmount	2250000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10414000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10244000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6791000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2088000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	841000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	60803000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14092000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	46711000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	6386000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1250000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	12502000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	11085000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8041000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1590000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5594000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-420000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14092000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5491000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7621000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	12768000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5002000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7451000	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1649000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	664000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	987000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	43000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	27000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	26000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-115000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-30000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-693000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-167000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-118000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-98000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14092000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5491000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7621000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1419000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1610000	USD
CY2020Q4	sfst	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	3941000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	7313000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6798000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	8397000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	9518000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	9271000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	197000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross		USD
CY2021Q4	sfst	Deferred Tax Assets Net Deferred Loan Fees DeferredTaxAssetsNetDeferredLoanFees	1054000	USD
CY2020Q4	sfst	Deferred Tax Assets Net Deferred Loan Fees DeferredTaxAssetsNetDeferredLoanFees	812000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	1930000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	1728000	USD
CY2021Q4	sfst	Deferred Tax Asset Sale Of Real Estate Owned DeferredTaxAssetSaleOfRealEstateOwned		USD
CY2020Q4	sfst	Deferred Tax Asset Sale Of Real Estate Owned DeferredTaxAssetSaleOfRealEstateOwned	216000	USD
CY2021Q4	sfst	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	5883000	USD
CY2020Q4	sfst	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	4102000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	260000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	187000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	15710000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	16316000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities		USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	272000	USD
CY2021Q4	sfst	Deferred Tax Liabilities Hedging Transactions DeferredTaxLiabilitiesHedgingTransactions	151000	USD
CY2020Q4	sfst	Deferred Tax Liabilities Hedging Transactions DeferredTaxLiabilitiesHedgingTransactions	855000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	148000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	120000	USD
CY2021Q4	sfst	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	5595000	USD
CY2021Q4	sfst	Commitment Under Letters Of Credit CommitmentUnderLettersOfCredit	10200000	USD
CY2020Q4	sfst	Commitment Under Letters Of Credit CommitmentUnderLettersOfCredit	8700000	USD
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-12400000	USD
CY2021	us-gaap	Noninterest Income NoninterestIncome	17101000	USD
CY2021	us-gaap	Noninterest Expense NoninterestExpense	56430000	USD
CY2021	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	1647000	USD
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	2100000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y8M12D
CY2021	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	1148000	USD
CY2020	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	1017000	USD
CY2019	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	1270000	USD
CY2021	sfst	Amortization Of Deferred Compensation On Restricted Stock AmortizationOfDeferredCompensationOnRestrictedStock	-499000	USD
CY2020	sfst	Amortization Of Deferred Compensation On Restricted Stock AmortizationOfDeferredCompensationOnRestrictedStock	-380000	USD
CY2019	sfst	Amortization Of Deferred Compensation On Restricted Stock AmortizationOfDeferredCompensationOnRestrictedStock	-428000	USD
CY2020	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	1397000	USD
CY2019	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	1698000	USD
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	1100000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	1200000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested In Period Fair Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1	1200000	USD
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	pure
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	93167000	USD
CY2021	us-gaap	Interest Expense InterestExpense	5435000	USD
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	87732000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	18328000	USD
CY2021Q4	us-gaap	Assets Assets	2925548000	USD
CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	94818000	USD
CY2020	us-gaap	Interest Expense InterestExpense	15008000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	79810000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	29600000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	27353000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	53744000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	23819000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5491000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	18328000	USD
CY2020Q4	us-gaap	Assets Assets	2482587000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	27858000	USD

Files In Submission

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$SFST
Southern First Bancshares Inc Stock $sfst

2022 Q1 Form 10-K Financial Statement

#000120677422000604 Filed on March 04, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SFST Southern First Bancshares Inc Stock $sfst

2022 Q1 Form 10-K Financial Statement

#000120677422000604 Filed on March 04, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SFST
Southern First Bancshares Inc Stock $sfst