$BFST
Business First Bancshares Inc Stock $bfst

$bfst Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000143774923005213 Filed on March 02, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$2.281M		$8.272M
YoY Change	-94.83%		-95.15%
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	$1.187M	$1.176M	$4.818M
YoY Change	6.94%	13.08%	15.82%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$26.74M		$36.54M
YoY Change	633.29%		120.71%
% of Operating Profit
Other Income/Expense, Net			$12.41M
YoY Change			8.93%
Pretax Income	$19.24M	$22.94M	$68.59M
YoY Change	74.33%	57.13%	6.25%
Income Tax	$4.211M	$4.974M	$14.34M
% Of Pretax Income	21.89%	21.68%	20.9%
Net Earnings	$15.03M	$16.62M	$54.26M
YoY Change	72.09%	37.67%	4.06%
Net Earnings / Revenue	658.7%		655.89%
Basic Earnings Per Share	$0.55		$2.34
Diluted Earnings Per Share	$0.54	$0.67	$2.32
COMMON SHARES
Basic Shares Outstanding	25.11M	25.11M	22.63M
Diluted Shares Outstanding	25.22M		22.82M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$159.8M	$152.7M
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	$64.07M	$63.18M	$63.18M
YoY Change	1.69%	8.64%	8.55%
Goodwill	$88.54M	$88.50M
YoY Change	-1.52%	47.76%
Intangibles
YoY Change
Long-Term Investments		$14.24M
YoY Change
Other Assets	$28.68M	$31.19M	$31.19M
YoY Change	24.7%	254.48%	254.48%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$6.290B	$5.990B	$5.990B
YoY Change	17.3%	26.75%	26.74%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$3.513M	$2.092M	$2.092M
YoY Change	290.33%	49.43%	49.43%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$31.30M	$34.27M	$34.27M
YoY Change	33.76%	79.45%	79.45%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$34.81M	$36.37M	$36.37M
YoY Change	3768.11%	2497.57%	2497.57%
LONG-TERM LIABILITIES
Long-Term Debt	$425.6M	$115.7M	$115.7M
YoY Change	266.26%	33.97%	33.97%
Other Long-Term Liabilities	$30.57M	$27.42M	$27.42M
YoY Change	12.39%	2.31%	2.31%
Total Long-Term Liabilities	$456.2M	$143.2M	$143.2M
YoY Change	218.11%	26.47%	26.47%
TOTAL LIABILITIES
Total Short-Term Liabilities	$34.81M	$36.37M	$36.37M
Total Long-Term Liabilities	$456.2M	$143.2M	$143.2M
Total Liabilities	$5.692B	$5.410B	$5.410B
YoY Change	16.04%	26.02%	26.02%
SHAREHOLDERS EQUITY
Retained Earnings	$173.8M	$164.0M
YoY Change	35.57%	34.53%
Common Stock	$420.0M	$418.8M
YoY Change	14.0%	33.94%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$597.7M	$580.5M	$580.5M
YoY Change
Total Liabilities & Shareholders Equity	$6.290B	$5.990B	$5.990B
YoY Change	17.3%	26.75%	26.74%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$15.03M	$16.62M	$54.26M
YoY Change	72.09%	37.67%	4.06%
Depreciation, Depletion And Amortization	$1.187M	$1.176M	$4.818M
YoY Change	6.94%	13.08%	15.82%
Cash From Operating Activities	$22.94M	$11.38M	$69.58M
YoY Change	17.86%	-22.32%	23.27%
INVESTING ACTIVITIES
Capital Expenditures	$2.075M	$588.0K	$7.781M
YoY Change	-46.78%	-120.14%	95.95%
Acquisitions
YoY Change
Other Investing Activities	-$287.3M	-$170.9M	-$692.7M
YoY Change	-399.0%	-52.47%	3.18%
Cash From Investing Activities	-$289.4M	-$171.5M	-$700.5M
YoY Change	-413.91%	-52.69%	3.73%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			-$48.49M
YoY Change			-758.95%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$273.5M	160.2M	$715.3M
YoY Change	168.03%	-52.16%	32.92%
NET CHANGE
Cash From Operating Activities	$22.94M	11.38M	$69.58M
Cash From Investing Activities	-$289.4M	-171.5M	-$700.5M
Cash From Financing Activities	$273.5M	160.2M	$715.3M
Net Change In Cash	$7.027M	69.00K	$84.37M
YoY Change	-96.71%	-100.53%	-204.47%
FREE CASH FLOW
Cash From Operating Activities	$22.94M	$11.38M	$69.58M
Capital Expenditures	$2.075M	$588.0K	$7.781M
Free Cash Flow	$20.86M	$10.79M	$61.80M
YoY Change	34.06%	-38.58%	17.77%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	82022000	usd
CY2022Q4	us-gaap	Subordinated Debt SubordinatedDebt	110749000	usd
CY2021Q4	us-gaap	Subordinated Debt SubordinatedDebt	81427000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	5409979000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	4293010000	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	71930000	usd
CY2021Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	25110000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	20400000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-74204000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	580481000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	433368000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5990460000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4726378000	usd
CY2020	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	140459000	usd
CY2022	bfst	Interest And Dividend Income On Non Taxable Securities Operating InterestAndDividendIncomeOnNonTaxableSecuritiesOperating	4131000	usd
CY2021	bfst	Interest And Dividend Income On Non Taxable Securities Operating InterestAndDividendIncomeOnNonTaxableSecuritiesOperating	4274000	usd
CY2020	bfst	Interest And Dividend Income On Non Taxable Securities Operating InterestAndDividendIncomeOnNonTaxableSecuritiesOperating	3183000	usd
CY2022	bfst	Interest And Dividend Income Taxable Securities Operating InterestAndDividendIncomeTaxableSecuritiesOperating	12372000	usd
CY2021	bfst	Interest And Dividend Income Taxable Securities Operating InterestAndDividendIncomeTaxableSecuritiesOperating	9246000	usd
CY2020	bfst	Interest And Dividend Income Taxable Securities Operating InterestAndDividendIncomeTaxableSecuritiesOperating	5938000	usd
CY2022	bfst	Interest On Federal Funds Sold And Due From Banks InterestOnFederalFundsSoldAndDueFromBanks	1579000	usd
CY2021	bfst	Interest On Federal Funds Sold And Due From Banks InterestOnFederalFundsSoldAndDueFromBanks	127000	usd
CY2020	bfst	Interest On Federal Funds Sold And Due From Banks InterestOnFederalFundsSoldAndDueFromBanks	175000	usd
CY2021	us-gaap	Interest Expense InterestExpense	16554000	usd
CY2020	us-gaap	Interest Expense InterestExpense	22109000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	199577000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	153884000	usd
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	127646000	usd
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	10886000	usd
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8047000	usd
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	11435000	usd
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	135000	usd
CY2022	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	574000	usd
CY2021	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	10117000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	18474000	usd
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	11474000	usd
CY2020	us-gaap	Noninterest Income NoninterestIncome	21564000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	85222000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	65825000	usd
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	57394000	usd
CY2022	us-gaap	Occupancy Net OccupancyNet	19367000	usd
CY2021	us-gaap	Occupancy Net OccupancyNet	15750000	usd
CY2020	us-gaap	Occupancy Net OccupancyNet	11380000	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	44820000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	35486000	usd
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	32219000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	149409000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	117061000	usd
CY2020	us-gaap	Noninterest Expense NoninterestExpense	100993000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	68592000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	64558000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14337000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	52136000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	29994000	usd
CY2022	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1350000	usd
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CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	52905000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	52136000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	29994000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.54
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.65
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.32
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CY2022	us-gaap	Net Income Loss NetIncomeLoss	54255000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	52136000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	29994000	usd
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CY2022	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	874000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-135000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-19565000	usd
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	2131000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-18772000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	40331000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	29994000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	8015000	usd
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	7520000	usd
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	102044000	usd
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001624322
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	38178000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29112000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
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CY2022Q4	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	1000000	usd
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CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20400349
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CY2022	dei	Document Type DocumentType	10-K
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CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-38447
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	LA
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-5340628
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CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	500 Laurel Street, Suite 101
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Baton Rouge
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	LA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	70801
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CY2022	dei	City Area Code CityAreaCode	225
CY2022	dei	Local Phone Number LocalPhoneNumber	248-7600
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $1.00 per share
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CY2022	dei	Trading Symbol TradingSymbol	BFST
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2021	us-gaap	Net Income Loss NetIncomeLoss	52136000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	20208000	usd
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	19121000	usd
CY2022Q4	bfst	Shortterm Borrowings Excluding Securities Sold Under Agreements To Repurchase ShorttermBorrowingsExcludingSecuritiesSoldUnderAgreementsToRepurchase	9000	usd
CY2022Q4	bfst	Trust Preferred Securities TrustPreferredSecurities	5000000	usd
CY2021Q4	bfst	Shortterm Borrowings Excluding Securities Sold Under Agreements To Repurchase ShorttermBorrowingsExcludingSecuritiesSoldUnderAgreementsToRepurchase	20000	usd
CY2021Q4	bfst	Trust Preferred Securities TrustPreferredSecurities	5000000	usd
CY2022Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	2092000	usd
CY2021Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1354000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	27419000	usd
CY2021Q4	us-gaap	Other Liabilities OtherLiabilities	26783000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	393690000	usd
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	292271000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	163955000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	121874000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1177000	usd
CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	149755000	usd
CY2020	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	4597000	usd
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	24413000	usd
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	12183000	usd
CY2022	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	218032000	usd
CY2021	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	156791000	usd
CY2022	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	12124000	usd
CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	236114000	usd
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	170438000	usd
CY2021	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	4371000	usd
CY2020	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	4547000	usd
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	188691000	usd
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	145837000	usd
CY2020	us-gaap	Interest Expense Deposits InterestExpenseDeposits	17562000	usd
CY2022	us-gaap	Interest Expense InterestExpense	36537000	usd
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	116211000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	8272000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	6813000	usd
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	5358000	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	-48000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	20512000	usd
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	378000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	29310000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	35782000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-3138000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12422000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6788000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	54255000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	36782000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-73027000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-11805000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	38009000	usd
CY2021	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	-336000	usd
CY2020	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	228000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	48000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-378000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	8015000	usd
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	285097000	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	3564000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	2861000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-11805000	usd
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9436000	usd
CY2021	bfst	Stock Surrendered Of Options Exercised StockSurrenderedOfOptionsExercised	2992000	usd
CY2021	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	10923000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	433368000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	54255000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-73027000	usd
CY2022	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	1350000	usd
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	10824000	usd
CY2022	bfst	Stock Issued During Period Value New Issues Net Of Issuance Costs StockIssuedDuringPeriodValueNewIssuesNetOfIssuanceCosts	71930000	usd
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	103535000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	3696000	usd
CY2022	bfst	Stock Surrendered Of Options Exercised StockSurrenderedOfOptionsExercised	1102000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	580481000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	54255000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	52136000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	29994000	usd
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	10886000	usd
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8047000	usd
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	11435000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	4818000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	4163000	usd
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	3164000	usd
CY2022	bfst	Business Acquisition Amortization Accretion Fair Market Value Adjustments BusinessAcquisitionAmortizationAccretionFairMarketValueAdjustments	-7949000	usd
CY2021	bfst	Business Acquisition Amortization Accretion Fair Market Value Adjustments BusinessAcquisitionAmortizationAccretionFairMarketValueAdjustments	-7122000	usd
CY2020	bfst	Business Acquisition Amortization Accretion Fair Market Value Adjustments BusinessAcquisitionAmortizationAccretionFairMarketValueAdjustments	-7283000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	3696000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	2861000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	2453000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-6005000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-7021000	usd
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-5136000	usd
CY2022	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-48000	usd
CY2021	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	378000	usd
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	135000	usd
CY2022	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	398000	usd
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	9179000	usd
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	-0	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1554000	usd
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2399000	usd
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2658000	usd
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-92000	usd
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1404000	usd
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	30000	usd
CY2022	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1931000	usd
CY2021	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1396000	usd
CY2020	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	940000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1368000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	586000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-58000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-0	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	492000	usd
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-0	usd
CY2022	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	3466000	usd
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-4298000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-6075000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3500000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2655000	usd
CY2022	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	519000	usd
CY2021	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-1145000	usd
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	10648000	usd
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-1694000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-151000	usd
CY2020	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-48767000	usd
CY2022	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	-14057000	usd
CY2022	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	0	usd
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1538000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3258000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	69577000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	56443000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	29339000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	102809000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	528059000	usd
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	233566000	usd
CY2022	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	38951000	usd
CY2021	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	29945000	usd
CY2020	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	66779000	usd
CY2022	bfst	Proceeds From Repayments Of Investment Securities Available For Sale ProceedsFromRepaymentsOfInvestmentSecuritiesAvailableForSale	95019000	usd
CY2021	bfst	Proceeds From Repayments Of Investment Securities Available For Sale ProceedsFromRepaymentsOfInvestmentSecuritiesAvailableForSale	96408000	usd
CY2020	bfst	Proceeds From Repayments Of Investment Securities Available For Sale ProceedsFromRepaymentsOfInvestmentSecuritiesAvailableForSale	73890000	usd
CY2022	bfst	Cash Acquired From Paid For Acquisition CashAcquiredFromPaidForAcquisition	163460000	usd
CY2021	bfst	Cash Acquired From Paid For Acquisition CashAcquiredFromPaidForAcquisition	-7256000	usd
CY2020	bfst	Cash Acquired From Paid For Acquisition CashAcquiredFromPaidForAcquisition	106000000	usd
CY2022	bfst	Payments To Sell Branch Net PaymentsToSellBranchNet	-0	usd
CY2021	bfst	Payments To Sell Branch Net PaymentsToSellBranchNet	13727000	usd
CY2020	bfst	Payments To Sell Branch Net PaymentsToSellBranchNet	-0	usd
CY2022	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	22670000	usd
CY2021	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	4438000	usd
CY2020	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	681000	usd
CY2022	bfst	Redemption Of Other Equity Securities RedemptionOfOtherEquitySecurities	10327000	usd
CY2021	bfst	Redemption Of Other Equity Securities RedemptionOfOtherEquitySecurities	2575000	usd
CY2020	bfst	Redemption Of Other Equity Securities RedemptionOfOtherEquitySecurities	8577000	usd
CY2022	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	18000000	usd
CY2021	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	15928000	usd
CY2020	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	-0	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	499000	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1974000	usd
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
CY2022	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	0	usd
CY2021	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	243607000	usd
CY2020	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	0	usd
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1070354000	usd
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	431236000	usd
CY2020	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	384962000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7781000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3971000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2970000	usd
CY2022	bfst	Loss On Disposal Of Property Plant And Equipment LossOnDisposalOfPropertyPlantAndEquipment	717000	usd
CY2021	bfst	Loss On Disposal Of Property Plant And Equipment LossOnDisposalOfPropertyPlantAndEquipment	4000	usd
CY2020	bfst	Loss On Disposal Of Property Plant And Equipment LossOnDisposalOfPropertyPlantAndEquipment	576000	usd
CY2022	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	682000	usd
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	7640000	usd
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	3842000	usd
CY2022	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	211438000	usd
CY2021	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	-52892000	usd
CY2020	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	-112780000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-700521000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-675354000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-475295000	usd
CY2021	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	-0	usd
CY2020	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	-0	usd
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	265827000	usd
CY2022	bfst	Net Repayments Advances Of Federal Home Loan Bank Borrowings NetRepaymentsAdvancesOfFederalHomeLoanBankBorrowings	327203000	usd
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	480124000	usd
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	658388000	usd
CY2022	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	1087000	usd
CY2021	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-2704000	usd
CY2021	bfst	Net Repayments Advances Of Federal Home Loan Bank Borrowings NetRepaymentsAdvancesOfFederalHomeLoanBankBorrowings	39022000	usd
CY2020	bfst	Net Repayments Advances Of Federal Home Loan Bank Borrowings NetRepaymentsAdvancesOfFederalHomeLoanBankBorrowings	-89198000	usd
CY2022	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	-11000	usd
CY2021	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	-6000000	usd
CY2021	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	-5000000	usd
CY2020	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	1369000	usd
CY2021	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	usd
CY2020	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	-1797000	usd
CY2022	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	52500000	usd
CY2020	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	48492000	usd
CY2020	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	71930000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3564000	usd
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3361000	usd
CY2022	bfst	Payments For Surrendered Shares Of Options Exercised PaymentsForSurrenderedSharesOfOptionsExercised	1102000	usd
CY2021	bfst	Payments For Surrendered Shares Of Options Exercised PaymentsForSurrenderedSharesOfOptionsExercised	2992000	usd
CY2020	bfst	Payments For Surrendered Shares Of Options Exercised PaymentsForSurrenderedSharesOfOptionsExercised	4321000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	-0	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	10923000	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5799000	usd
CY2022	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	1350000	usd
CY2021	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	-0	usd
CY2020	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	-0	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	10824000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	9436000	usd
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	7520000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	715309000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	538155000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	505716000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	84365000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-80756000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	59760000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	68375000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	149131000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	89371000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	152740000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	68375000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	149131000	usd
CY2022	bfst	Interest On Deposits InterestOnDeposits	23846000	usd
CY2021	bfst	Interest On Deposits InterestOnDeposits	13249000	usd
CY2020	bfst	Interest On Deposits InterestOnDeposits	16589000	usd
CY2022	bfst	Interest Paid On Borrowings Net InterestPaidOnBorrowingsNet	11953000	usd
CY2021	bfst	Interest Paid On Borrowings Net InterestPaidOnBorrowingsNet	4450000	usd
CY2020	bfst	Interest Paid On Borrowings Net InterestPaidOnBorrowingsNet	4554000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	13550000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	15711000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	5470000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-93466000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-14607000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	9918000	usd
CY2022	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	874000	usd
CY2021	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	-336000	usd
CY2020	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	228000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	19565000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	3138000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-2131000	usd
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	719000	usd
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1420000	usd
CY2020	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1506000	usd
CY2022	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	0	usd
CY2021	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	0	usd
CY2020	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	5900000	usd
CY2022	bfst	Noncash Or Part Noncash Acquisition Identifiable Assets Acquired NoncashOrPartNoncashAcquisitionIdentifiableAssetsAcquired	531510000	usd
CY2021	bfst	Noncash Or Part Noncash Acquisition Identifiable Assets Acquired NoncashOrPartNoncashAcquisitionIdentifiableAssetsAcquired	1343000	usd
CY2020	bfst	Noncash Or Part Noncash Acquisition Identifiable Assets Acquired NoncashOrPartNoncashAcquisitionIdentifiableAssetsAcquired	1330940000	usd
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	4211000	usd
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	508991000	usd
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	1241834000	usd
CY2022	bfst	Noncash Or Part Noncash Acquisition Assets Acquired Liabilities Assumed NoncashOrPartNoncashAcquisitionAssetsAcquiredLiabilitiesAssumed	26394000	usd
CY2021	bfst	Noncash Or Part Noncash Acquisition Assets Acquired Liabilities Assumed NoncashOrPartNoncashAcquisitionAssetsAcquiredLiabilitiesAssumed	5637000	usd
CY2022	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	3875000	usd
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	4300000	usd
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	6000	usd
CY2020	bfst	Noncash Or Part Noncash Acquisition Assets Acquired Liabilities Assumed NoncashOrPartNoncashAcquisitionAssetsAcquiredLiabilitiesAssumed	93317000	usd
CY2022	us-gaap	Notes Issued1 NotesIssued1	0	usd
CY2021	us-gaap	Notes Issued1 NotesIssued1	3927000	usd
CY2020	us-gaap	Notes Issued1 NotesIssued1	0	usd
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"/> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt 0pt 0pt 15pt;"><span style="text-decoration: underline; ">Estimates</span></p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt 0pt 0pt 15pt;">Preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying disclosures. These estimates are based on management’s best knowledge of current events and actions the Company <em style="font: inherit;"> may </em>undertake in the future. Critical accounting estimates that are particularly susceptible to significant change for the Company include the determination of the fair value and subsequent accounting for acquired loans and allowance for loan losses and purchase accounting adjustments (other than loans). Other estimates include goodwill, fair value of financial instruments, investment securities and the assessment of income taxes. Management does <em style="font: inherit;">not</em> anticipate any material changes to estimates in the near term. Factors that <em style="font: inherit;"> may </em>cause sensitivity to the aforementioned estimates include but are <em style="font: inherit;">not</em> limited to: external market factors such as market interest rates and employment rates, changes to operating policies and procedures, economic conditions in the Company’s markets, and changes in applicable banking regulations. Actual results <em style="font: inherit;"> may </em>ultimately differ from estimates.</p> <div> </div> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt 0pt 0pt 15pt;">The Bank’s loans are generally secured by specific items of collateral including real property, business assets, and consumer assets. Although the Bank has a diversified loan portfolio, a substantial portion of its debtors’ ability to honor their contracts is dependent on local economic conditions in the Bank’s market area.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt 0pt 0pt 15pt;">While management uses available information to recognize losses on loans, further reductions in the carrying amounts of loans <em style="font: inherit;"> may </em>be necessary based on changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the estimated losses on loans. Such agencies <em style="font: inherit;"> may </em>require the Bank to recognize additional losses based on their judgments about information available to them at the time of their examination.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt 0pt 0pt 15pt;">Because of these factors, it is reasonably possible that the estimated losses on loans <em style="font: inherit;"> may </em>change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated.</p>
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	usd
CY2021Q4	us-gaap	Trading Securities TradingSecurities	0	usd
CY2022	us-gaap	Advertising Expense AdvertisingExpense	3900000	usd
CY2021	us-gaap	Advertising Expense AdvertisingExpense	2700000	usd
CY2020	us-gaap	Advertising Expense AdvertisingExpense	1600000	usd
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.64
CY2022	us-gaap	Reclassifications Reclassifications	<p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt;"><b>Note <em style="font: inherit;">2</em> </b>–<b> Reclassifications </b>–</p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt 0pt 0pt 15pt;">Certain reclassifications <em style="font: inherit;"> may </em>have been made to the prior years’ financial statements in order to conform to the classifications adopted for reporting in <em style="font: inherit;">2022.</em> These reclassifications have <em style="font: inherit;">no</em> material effect on previously reported shareholders’ equity or net income.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2022	us-gaap	Net Income Loss NetIncomeLoss	54255000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	52136000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	29994000	usd
CY2022	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	1350000	usd
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	usd
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	0	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	52905000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	52136000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	29994000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	22633478
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20502249
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18169599
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	184015
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	132032
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	73846
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	22817493
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20634281
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18243445
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.34
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.54
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.65
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.32
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.53
CY2022Q4	bfst	Reserve Requirements With Federal Reserve ReserveRequirementsWithFederalReserve	0	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	985599000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	303000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	95151000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	890751000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1022443000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	8160000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	9542000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1021061000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	312398000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	20007000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	505752000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	75144000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	818150000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	95151000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	608279000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	8899000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	29146000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	643000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	637425000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	9542000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	18071000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	17908000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	232550000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	218789000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	373007000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	336559000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	361971000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	317495000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	985599000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	890751000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	482700000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	373400000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	9000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	593000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	293000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	57000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	215000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	158000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4606176000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3189608000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	38178000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29112000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	4567998000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3160496000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	13100000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	7700000	usd
CY2022Q4	bfst	Loans And Leases Receivable Reclassified From Overdraft LoansAndLeasesReceivableReclassifiedFromOverdraft	2000000.0	usd
CY2021Q4	bfst	Loans And Leases Receivable Reclassified From Overdraft LoansAndLeasesReceivableReclassifiedFromOverdraft	2400000	usd
CY2022Q4	bfst	Loans Receivable Unpaid Principal Balance LoansReceivableUnpaidPrincipalBalance	683300000	usd
CY2021Q4	bfst	Loans Receivable Unpaid Principal Balance LoansReceivableUnpaidPrincipalBalance	461800000	usd
CY2022Q4	us-gaap	Servicing Asset ServicingAsset	1700000	usd
CY2021Q4	us-gaap	Servicing Asset ServicingAsset	1400000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29112000	usd
CY2022	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	2821000	usd
CY2022	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	1001000	usd
CY2022	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	10886000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	38178000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	2214000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	35964000	usd
CY2022Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	0	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4606176000	usd
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	14707000	usd
CY2022Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4541682000	usd
CY2022Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	49787000	usd
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	22024000	usd
CY2021	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1636000	usd
CY2021	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	677000	usd
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8047000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29112000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	694000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	28418000	usd
CY2021Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	0	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3189608000	usd
CY2021Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13821000	usd
CY2021Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	3124567000	usd
CY2021Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	51220000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11100000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4606176000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3189608000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	335000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	222000	usd
CY2022Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	21474000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	12900000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4606176000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	335000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3189608000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	222000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	11054000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	12868000	usd
CY2022	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	378000	usd
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	334000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	6994000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	7234000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2214000	usd
CY2022	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	3553000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	7713000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	11477000	usd
CY2022	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	12100000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	14707000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	18711000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	2214000	usd
CY2022	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	15653000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1952000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2170000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	694000	usd
CY2021	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2284000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	11869000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	13978000	usd
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	11038000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13821000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	16148000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	694000	usd
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	13322000	usd
CY2022Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition	52899000	usd
CY2022Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	26803000	usd
CY2022Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period Cash Flows Expected To Be Collected At Acquisition CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodCashFlowsExpectedToBeCollectedAtAcquisition	26096000	usd
CY2022Q1	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	-4622000	usd
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	455117000	usd
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	317821000	usd
CY2021Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	20659000	usd
CY2022	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	4622000	usd
CY2022	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	8400000	usd
CY2022	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	7739000	usd
CY2022	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Period Increase Decrease CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease	-3658000	usd
CY2022Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	22284000	usd
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	pure
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	1500000	usd
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	3	pure
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	154000	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	pure
CY2022	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3500000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3200000	usd
CY2022Q4	bfst	Financing Receivable Accrued Interest Receivable Loans Deferrals FinancingReceivableAccruedInterestReceivableLoansDeferrals	5400000	usd
CY2021Q4	bfst	Financing Receivable Accrued Interest Receivable Loans Deferrals FinancingReceivableAccruedInterestReceivableLoansDeferrals	6000000.0	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	111388000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	96974000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	48211000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	38819000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	63177000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	58155000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	4800000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	4200000	usd
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	3200000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	88500000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	59900000	usd
CY2022	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	28600000	usd
CY2021	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	6000000.0	usd
CY2022Q4	bfst	Time Deposits250000 Or More TimeDeposits250000OrMore	279781000	usd
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Demand InterestBearingDomesticDepositDemand	198622000	usd
CY2021	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	168000	usd
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	579789000	usd
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Negotiable Order Of Withdrawal Now InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW	581449000	usd
CY2021Q4	us-gaap	Interestbearing Domestic Deposit Other InterestbearingDomesticDepositOther	495383000	usd
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	1136597000	usd
CY2022Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	17225000	usd
CY2021Q4	us-gaap	Finite Lived Core Deposits Gross FiniteLivedCoreDepositsGross	13128000	usd
CY2022	bfst	Finitelived Intangible Assets Adjustment For Sale Of Branch FinitelivedIntangibleAssetsAdjustmentForSaleOfBranch	0	usd
CY2021	bfst	Finitelived Intangible Assets Adjustment For Sale Of Branch FinitelivedIntangibleAssetsAdjustmentForSaleOfBranch	-203000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	7058000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5022000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	14042000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	12203000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2000000.0	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1600000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1200000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	2100000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	2100000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1893000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1824000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1824000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	4301000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	14042000	usd
CY2022Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	1549381000	usd
CY2021Q4	us-gaap	Noninterest Bearing Domestic Deposit Demand NoninterestBearingDomesticDepositDemand	1291036000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1549381000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1291036000	usd
CY2021Q4	bfst	Time Deposits250000 Or More TimeDeposits250000OrMore	197273000	usd
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	995699000	usd
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	312884000	usd
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3270964000	usd
CY2022Q4	us-gaap	Interestbearing Domestic Deposit Other InterestbearingDomesticDepositOther	506796000	usd
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7720000	usd
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2786247000	usd
CY2022Q4	us-gaap	Deposits Deposits	4820345000	usd
CY2021Q4	us-gaap	Deposits Deposits	4077283000	usd
CY2022Q4	bfst	Percentage Of Certificate Of Deposit Maturities Year One PercentageOfCertificateOfDepositMaturitiesYearOne	0.765	pure
CY2022Q4	bfst	Percentage Of Certificate Of Deposit Maturities Year Two And Thereafter PercentageOfCertificateOfDepositMaturitiesYearTwoAndThereafter	0.235	pure
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	550200000	usd
CY2021Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	282800000	usd
CY2022Q4	bfst	Interest Bearing Deposits Public Funds Brokered InterestBearingDepositsPublicFundsBrokered	131900000	usd
CY2021Q4	bfst	Interest Bearing Deposits Public Funds Brokered InterestBearingDepositsPublicFundsBrokered	92600000	usd
CY2022Q4	bfst	Deposits Public Funds Non Brokered DepositsPublicFundsNonBrokered	504100000	usd
CY2021Q4	bfst	Deposits Public Funds Non Brokered DepositsPublicFundsNonBrokered	493200000	usd
CY2022Q4	bfst	Advances From Federal Home Loan Banks Net Of Unaccreted Market Value Adjustment AdvancesFromFederalHomeLoanBanksNetOfUnaccretedMarketValueAdjustment	410100000	usd
CY2021Q4	bfst	Advances From Federal Home Loan Banks Net Of Unaccreted Market Value Adjustment AdvancesFromFederalHomeLoanBanksNetOfUnaccretedMarketValueAdjustment	82000000.0	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	1800000000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	1300000000	usd
CY2020Q2	bfst	Trust Preferred Securities TrustPreferredSecurities	5000000.0	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	20200000	usd
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	19100000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	12969000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	13008000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6730000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1368000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-586000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	58000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14337000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12422000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6788000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	690000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	815000	usd
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	608000	usd
CY2020	bfst	Effective Income Tax Rate Reconciliation Goodwill Writeoff EffectiveIncomeTaxRateReconciliationGoodwillWriteoff	0	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	607000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-135000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14404000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	13557000	usd
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	406000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14337000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12422000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	16000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-220000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-730000	usd
CY2022	bfst	Effective Income Tax Rate Reconciliation Goodwill Writeoff EffectiveIncomeTaxRateReconciliationGoodwillWriteoff	0	usd
CY2021	bfst	Effective Income Tax Rate Reconciliation Goodwill Writeoff EffectiveIncomeTaxRateReconciliationGoodwillWriteoff	35000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6788000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	2285000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	1642000	usd
CY2022Q4	bfst	Deferred Tax Assets Operating Loss Carryforwards State And Local Valuation Allowance DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalValuationAllowance	2285000	usd
CY2021Q4	bfst	Deferred Tax Assets Operating Loss Carryforwards State And Local Valuation Allowance DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocalValuationAllowance	1642000	usd
CY2022Q4	bfst	Deferred Tax Assets Operating Loss Carryforwards Excluding State And Local DeferredTaxAssetsOperatingLossCarryforwardsExcludingStateAndLocal	1700000	usd
CY2021Q4	bfst	Deferred Tax Assets Operating Loss Carryforwards Excluding State And Local DeferredTaxAssetsOperatingLossCarryforwardsExcludingStateAndLocal	18000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	20040000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	290000	usd
CY2022Q4	bfst	Deferred Tax Assets Acquired Loans Fair Market Value Adjustment DeferredTaxAssetsAcquiredLoansFairMarketValueAdjustment	5705000	usd
CY2021Q4	bfst	Deferred Tax Assets Acquired Loans Fair Market Value Adjustment DeferredTaxAssetsAcquiredLoansFairMarketValueAdjustment	5790000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	8067000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	6114000	usd
CY2022Q4	bfst	Deferred Tax Assets Right Of Use Asset DeferredTaxAssetsRightOfUseAsset	3731000	usd
CY2021Q4	bfst	Deferred Tax Assets Right Of Use Asset DeferredTaxAssetsRightOfUseAsset	3004000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	1589000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	1346000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1135000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	791000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	940000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	817000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	42907000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	18170000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	3693000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	3004000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	2967000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	2562000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2512000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1802000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	1477000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	1716000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1064000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	264000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	11713000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	9348000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	31194000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	8822000	usd
CY2022Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	57475	usd
CY2021Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1000	pure
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	367431000	usd
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CY2022Q3	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.0750	pure
CY2022	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	18.75
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CY2022Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1275	pure
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CY2022Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800	pure
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CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600	pure
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CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	18.18
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CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	385300
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CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	118958
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CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	1300000	usd
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y10M24D
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CY2022	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.04	pure
CY2022	bfst	Employee Compensation And Benefits EmployeeCompensationAndBenefits	2300000	usd
CY2021	bfst	Employee Compensation And Benefits EmployeeCompensationAndBenefits	1800000	usd
CY2020	bfst	Employee Compensation And Benefits EmployeeCompensationAndBenefits	1400000	usd
CY2022Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	3000000.0	usd
CY2021Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	2600000	usd
CY2022	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	507000	usd
CY2021	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	408000	usd
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	285000	usd
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CY2020	bfst	Fee Income From Debit Card And Atm FeeIncomeFromDebitCardAndAtm	4320000	usd
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CY2020	bfst	Passthrough Income From Sbic Partnership PassthroughIncomeFromSbicPartnership	2538000	usd
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CY2020	us-gaap	Other Income OtherIncome	2706000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	20512000	usd
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CY2021	us-gaap	Advertising Expense AdvertisingExpense	2712000	usd
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CY2021	us-gaap	Supplies Expense SuppliesExpense	1131000	usd
CY2020	us-gaap	Supplies Expense SuppliesExpense	884000	usd
CY2022	bfst	Bank Regulatory Expenses BankRegulatoryExpenses	3124000	usd
CY2021	bfst	Bank Regulatory Expenses BankRegulatoryExpenses	2440000	usd
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CY2021	us-gaap	Taxes And Licenses TaxesAndLicenses	120000	usd
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CY2022	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	4808000	usd
CY2021	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	515000	usd
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CY2021	us-gaap	Other Expenses OtherExpenses	11396000	usd
CY2020	us-gaap	Other Expenses OtherExpenses	10760000	usd
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CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	35486000	usd
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CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
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CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4135000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3761000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2735000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2182000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2065000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	4298000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	19176000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1516000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	66800000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	27800000	usd
CY2022Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	58000000.0	usd
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	43800000	usd
CY2022	us-gaap	Loss Contingency Disclosures LossContingencyDisclosures	<p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;"><b>Note <em style="font: inherit;">25</em> </b>–<b> Litigation and Contingencies </b>–</p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt 0pt 0pt 15pt;">In the normal course of business, the Bank is involved in various legal proceedings. In the opinion of management and counsel, the disposition or ultimate resolution of such proceedings would <em style="font: inherit;">not</em> have a material adverse effect on the Bank’s financial statements.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2022	dei	Auditor Name AuditorName	FORVIS, LLP
CY2022	dei	Auditor Firm AuditorFirmId	686
CY2022	dei	Auditor Location AuditorLocation	Fort Worth, TX

Files In Submission

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$BFST Business First Bancshares Inc Stock $bfst

2023 Q1 Form 10-K Financial Statement

#000143774923005213 Filed on March 02, 2023

Income Statement

Balance Sheet

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Files In Submission

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