$BFST
Business First Bancshares Inc Stock $bfst

$bfst Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000143774921025284 Filed on November 04, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue		$41.53M	$42.46M
YoY Change		-2.18%	61.33%
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	$1.040M	$1.050M	$990.0K
YoY Change	2.97%	6.06%	135.71%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$4.240M	$5.529M
YoY Change		-23.31%	-8.79%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$14.60M	$12.93M	$11.71M
YoY Change	-16.09%	10.43%	71.58%
Income Tax	$2.540M	$2.617M	$2.098M
% Of Pretax Income	17.4%	20.24%	17.92%
Net Earnings	$12.07M	$10.31M	$9.609M
YoY Change	-12.73%	7.31%	74.36%
Net Earnings / Revenue		24.83%	22.63%
Basic Earnings Per Share		$0.51	$0.47
Diluted Earnings Per Share	$589.9K	$0.50	$0.46
COMMON SHARES
Basic Shares Outstanding	20.39M	20.38M	20.61M
Diluted Shares Outstanding		20.51M	20.70M

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$68.38M	$81.36M	$103.9M
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	$58.16M	$56.61M	$59.24M
YoY Change	-0.75%	-4.44%	118.67%
Goodwill	$59.89M	$60.06M	$53.63M
YoY Change	11.12%	12.0%	10.95%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$8.800M	$5.600M	$5.800M
YoY Change	49.15%	-3.45%	114.81%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$4.726B	$4.405B	$3.955B
YoY Change	13.61%	11.39%	78.07%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.400M	$1.800M	$3.600M
YoY Change	-44.0%	-50.0%	100.0%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$19.10M	$43.30M	$29.60M
YoY Change	-28.73%	46.28%	-4.52%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$1.400M	$1.800M	$3.600M
YoY Change	-44.0%	-50.0%	100.0%
LONG-TERM LIABILITIES
Long-Term Debt	$86.40M	$86.40M	$143.1M
YoY Change	140.0%	-39.62%	472.4%
Other Long-Term Liabilities	$26.80M	$27.30M	$26.00M
YoY Change	6.35%	5.0%	22.64%
Total Long-Term Liabilities	$113.2M	$113.7M	$169.1M
YoY Change	84.97%	-32.76%	266.02%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.400M	$1.800M	$3.600M
Total Long-Term Liabilities	$113.2M	$113.7M	$169.1M
Total Liabilities	$4.293B	$3.975B	$3.557B
YoY Change	14.47%	11.76%	83.28%
SHAREHOLDERS EQUITY
Retained Earnings	$121.9M	$112.2M	$67.40M
YoY Change	53.93%	66.54%	28.96%
Common Stock	$312.7M	$312.2M	$320.4M
YoY Change	-2.34%	-2.56%	42.17%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$433.4M	$430.2M	$398.1M
YoY Change
Total Liabilities & Shareholders Equity	$4.726B	$4.405B	$3.955B
YoY Change	13.61%	11.39%	78.07%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$12.07M	$10.31M	$9.609M
YoY Change	-12.73%	7.31%	74.36%
Depreciation, Depletion And Amortization	$1.040M	$1.050M	$990.0K
YoY Change	2.97%	6.06%	135.71%
Cash From Operating Activities	$14.65M	$12.12M	$21.84M
YoY Change	3.17%	-44.51%	273.97%
INVESTING ACTIVITIES
Capital Expenditures	-$2.920M	-$80.00K	$190.0K
YoY Change	1116.67%	-142.11%	-117.92%
Acquisitions
YoY Change
Other Investing Activities	-$359.6M	-$132.0M	-$14.64M
YoY Change	121.81%	801.71%	-78.29%
Cash From Investing Activities	-$362.5M	-$132.1M	-$14.44M
YoY Change	123.27%	814.75%	-78.92%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	334.9M	70.56M	-19.52M
YoY Change	73.16%	-461.48%	-131.5%
NET CHANGE
Cash From Operating Activities	14.65M	12.12M	21.84M
Cash From Investing Activities	-362.5M	-132.1M	-14.44M
Cash From Financing Activities	334.9M	70.56M	-19.52M
Net Change In Cash	-12.98M	-49.41M	-12.12M
YoY Change	-128.7%	307.67%	1656.52%
FREE CASH FLOW
Cash From Operating Activities	$14.65M	$12.12M	$21.84M
Capital Expenditures	-$2.920M	-$80.00K	$190.0K
Free Cash Flow	$17.57M	$12.20M	$21.65M
YoY Change	21.68%	-43.65%	213.77%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000
CY2021Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	81361000	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.00
CY2021Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000
CY2021Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20383504
CY2021Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	20383504
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20621437
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	20621437
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.10
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.34
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	pure
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	pure
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	20388996
CY2021Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28146000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	22024000	USD
CY2021Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2021Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2020Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	149131000	USD
CY2021Q3	us-gaap	Federal Funds Sold FederalFundsSold	4646000	USD
CY2020Q4	us-gaap	Federal Funds Sold FederalFundsSold	174152000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1034491000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	640605000	USD
CY2021Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	1498000	USD
CY2020Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	969000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3038090000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2969331000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	56611000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	58593000	USD
CY2021Q3	us-gaap	Interest Receivable InterestReceivable	19025000	USD
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	23895000	USD
CY2021Q3	bfst	Other Equity Securities Fair Value Disclosure OtherEquitySecuritiesFairValueDisclosure	15259000	USD
CY2020Q4	bfst	Other Equity Securities Fair Value Disclosure OtherEquitySecuritiesFairValueDisclosure	12693000	USD
CY2021Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2152000	USD
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	9051000	USD
CY2021Q3	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	59085000	USD
CY2020Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	45030000	USD
CY2021Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	5618000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	5858000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	60062000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	53862000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	12835000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9734000	USD
CY2021Q3	us-gaap	Other Assets OtherAssets	14484000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	7456000	USD
CY2021Q3	us-gaap	Assets Assets	4405217000	USD
CY2020Q4	us-gaap	Assets Assets	4160360000	USD
CY2021Q3	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1201791000	USD
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1164139000	USD
CY2021Q3	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2566330000	USD
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2452540000	USD
CY2021Q3	us-gaap	Deposits Deposits	3768121000	USD
CY2020Q4	us-gaap	Deposits Deposits	3616679000	USD
CY2021Q3	us-gaap	Federal Funds Purchased FederalFundsPurchased	16087000	USD
CY2020Q4	us-gaap	Federal Funds Purchased FederalFundsPurchased	0	USD
CY2021Q3	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	27195000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	21825000	USD
CY2021Q3	bfst	Shortterm Borrowings Excluding Securities Sold Under Agreements To Repurchase ShorttermBorrowingsExcludingSecuritiesSoldUnderAgreementsToRepurchase	20000	USD
CY2020Q4	bfst	Shortterm Borrowings Excluding Securities Sold Under Agreements To Repurchase ShorttermBorrowingsExcludingSecuritiesSoldUnderAgreementsToRepurchase	5020000	USD
CY2021Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	48002000	USD
CY2020Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	43145000	USD
CY2021Q3	us-gaap	Subordinated Debt SubordinatedDebt	81427000	USD
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	25000000	USD
CY2021Q3	bfst	Trust Preferred Securities TrustPreferredSecurities	5000000	USD
CY2020Q4	bfst	Trust Preferred Securities TrustPreferredSecurities	5000000	USD
CY2021Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1835000	USD
CY2020Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	2499000	USD
CY2021Q3	us-gaap	Other Liabilities OtherLiabilities	27309000	USD
CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	25229000	USD
CY2021Q3	us-gaap	Liabilities Liabilities	3974996000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	3750397000	USD
CY2021Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2021Q3	us-gaap	Common Stock Value CommonStockValue	20384000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	20621000	USD
CY2021Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	291847000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	299540000	USD
CY2021Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	112243000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	79174000	USD
CY2021Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	5747000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	10628000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	430221000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	409963000	USD
CY2021Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4405217000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4160360000	USD
CY2021Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	37900000	USD
CY2020Q3	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	39918000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	118454000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	98697000	USD
CY2021Q3	bfst	Interest And Dividend Income On Non Taxable Securities Operating InterestAndDividendIncomeOnNonTaxableSecuritiesOperating	3215000	USD
CY2020Q3	bfst	Interest And Dividend Income On Non Taxable Securities Operating InterestAndDividendIncomeOnNonTaxableSecuritiesOperating	2370000	USD
	bfst	Interest And Dividend Income On Non Taxable Securities Operating InterestAndDividendIncomeOnNonTaxableSecuritiesOperating	8556000	USD
	bfst	Interest And Dividend Income On Non Taxable Securities Operating InterestAndDividendIncomeOnNonTaxableSecuritiesOperating	6143000	USD
CY2021Q3	bfst	Interest And Dividend Income Taxable Securities Operating InterestAndDividendIncomeTaxableSecuritiesOperating	383000	USD
CY2020Q3	bfst	Interest And Dividend Income Taxable Securities Operating InterestAndDividendIncomeTaxableSecuritiesOperating	104000	USD
	bfst	Interest And Dividend Income Taxable Securities Operating InterestAndDividendIncomeTaxableSecuritiesOperating	1060000	USD
	bfst	Interest And Dividend Income Taxable Securities Operating InterestAndDividendIncomeTaxableSecuritiesOperating	237000	USD
CY2021Q3	bfst	Interest On Federal Funds Sold And Due From Banks InterestOnFederalFundsSoldAndDueFromBanks	36000	USD
CY2020Q3	bfst	Interest On Federal Funds Sold And Due From Banks InterestOnFederalFundsSoldAndDueFromBanks	69000	USD
	bfst	Interest On Federal Funds Sold And Due From Banks InterestOnFederalFundsSoldAndDueFromBanks	77000	USD
	bfst	Interest On Federal Funds Sold And Due From Banks InterestOnFederalFundsSoldAndDueFromBanks	291000	USD
CY2021Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	41534000	USD
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	42461000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	128147000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	105368000	USD
CY2021Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	3060000	USD
CY2020Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4345000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	9538000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	13826000	USD
CY2021Q3	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	1180000	USD
CY2020Q3	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	1184000	USD
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	3069000	USD
	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	3480000	USD
CY2021Q3	us-gaap	Interest Expense InterestExpense	4240000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	5529000	USD
	us-gaap	Interest Expense InterestExpense	12607000	USD
	us-gaap	Interest Expense InterestExpense	17306000	USD
CY2021Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	37294000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	36932000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	115540000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	88062000	USD
CY2021Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1147000	USD
CY2020Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2491000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6747000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	9301000	USD
CY2021Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	36147000	USD
CY2020Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	34441000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	108793000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	78761000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1763000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1592000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	5013000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	3686000	USD
CY2021Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-11000	USD
CY2020Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	95000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-66000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	120000	USD
CY2021Q3	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	93000	USD
CY2020Q3	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	0	USD
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	10114000	USD
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	184000	USD
CY2021Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	4503000	USD
CY2020Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2530000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	13746000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	8027000	USD
CY2021Q3	us-gaap	Noninterest Income NoninterestIncome	6348000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	4217000	USD
	us-gaap	Noninterest Income NoninterestIncome	28807000	USD
	us-gaap	Noninterest Income NoninterestIncome	12017000	USD
CY2021Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	16791000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	15430000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	48470000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	42486000	USD
CY2021Q3	us-gaap	Occupancy Net OccupancyNet	3912000	USD
CY2020Q3	us-gaap	Occupancy Net OccupancyNet	3228000	USD
	us-gaap	Occupancy Net OccupancyNet	11893000	USD
	us-gaap	Occupancy Net OccupancyNet	8007000	USD
CY2021Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8864000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8293000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	27283000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20898000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	29567000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	26951000	USD
	us-gaap	Noninterest Expense NoninterestExpense	87646000	USD
	us-gaap	Noninterest Expense NoninterestExpense	71391000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	12928000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11707000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	49954000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	19387000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2617000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2098000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9886000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3227000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	10311000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	9609000	USD
	us-gaap	Net Income Loss NetIncomeLoss	40068000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16160000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.51
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.95
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.93
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.50
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.94
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	10311000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	9609000	USD
	us-gaap	Net Income Loss NetIncomeLoss	40068000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16160000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-1246000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2168000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-6202000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	9282000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-11000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	95000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-66000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	120000	USD
CY2021Q3	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	-185000	USD
CY2020Q3	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	407000	USD
	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	-43000	USD
	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	407000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-298000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	435000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-1298000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	1924000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1122000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2045000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4881000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	7645000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9189000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	11654000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	35187000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	23805000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	386336000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	9609000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2045000	USD
CY2020Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2060000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	1359000	USD
CY2020Q3	bfst	Adjustments To Additional Paid In Capital Other Share Based Compensation AdjustmentsToAdditionalPaidInCapitalOtherShareBasedCompensation	797000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	398086000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	431006000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	10311000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1122000	USD
CY2021Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2450000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	150000	USD
CY2021Q3	bfst	Stock Surrendered Of Options Exercised StockSurrenderedOfOptionsExercised	150000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	814000	USD
CY2021Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	8338000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	430221000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	285097000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16160000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	7645000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5461000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	102044000	USD
	bfst	Stock Surrendered Of Options Exercised StockSurrenderedOfOptionsExercised	4321000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5608000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-4870000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	12375000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	5503000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-4276000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-664000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-572000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2074000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	4068000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	41789000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	15142000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	499686000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	107977000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	1922000	USD
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	5000000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	398086000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	409963000	USD
	us-gaap	Net Income Loss NetIncomeLoss	40068000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4881000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	6999000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	3210000	USD
	bfst	Stock Surrendered Of Options Exercised StockSurrenderedOfOptionsExercised	2276000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	2059000	USD
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	10923000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	430221000	USD
	us-gaap	Net Income Loss NetIncomeLoss	40068000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16160000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6747000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	9301000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	3117000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	2154000	USD
	bfst	Business Acquisition Amortization Accretion Fair Market Value Adjustments BusinessAcquisitionAmortizationAccretionFairMarketValueAdjustments	-5991000	USD
	bfst	Business Acquisition Amortization Accretion Fair Market Value Adjustments BusinessAcquisitionAmortizationAccretionFairMarketValueAdjustments	-4529000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	2059000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1922000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-5242000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3458000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-66000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	120000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	9179000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	-0	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2074000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2473000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1369000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-169000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1029000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	689000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	617000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	22206000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	56137000	USD
	bfst	Proceeds From Repayments Of Investment Securities Available For Sale ProceedsFromRepaymentsOfInvestmentSecuritiesAvailableForSale	72150000	USD
	bfst	Proceeds From Repayments Of Investment Securities Available For Sale ProceedsFromRepaymentsOfInvestmentSecuritiesAvailableForSale	52920000	USD
	bfst	Cash Acquired From Paid For Acquisition CashAcquiredFromPaidForAcquisition	-7256000	USD
	bfst	Cash Acquired From Paid For Acquisition CashAcquiredFromPaidForAcquisition	106000000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	3084000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	571000	USD
	bfst	Redemption Of Other Equity Securities RedemptionOfOtherEquitySecurities	2549000	USD
	bfst	Redemption Of Other Equity Securities RedemptionOfOtherEquitySecurities	5513000	USD
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	15000000	USD
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	-0	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1974000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	243607000	USD
	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	0	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	305615000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	477621000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1050000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2729000	USD
	bfst	Loss On Disposal Of Property Plant And Equipment LossOnDisposalOfPropertyPlantAndEquipment	0	USD
	bfst	Loss On Disposal Of Property Plant And Equipment LossOnDisposalOfPropertyPlantAndEquipment	627000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	6873000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1790000	USD
	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	169506000	USD
	us-gaap	Increase Decrease In Federal Funds Sold IncreaseDecreaseInFederalFundsSold	52977000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-312826000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-312934000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	152298000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	278184000	USD
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	5370000	USD
	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-45988000	USD
	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	-16087000	USD
	us-gaap	Increase Decrease In Federal Funds Purchased IncreaseDecreaseInFederalFundsPurchased	-0	USD
	bfst	Net Repayments Advances Of Federal Home Loan Bank Borrowings NetRepaymentsAdvancesOfFederalHomeLoanBankBorrowings	5000000	USD
	bfst	Net Repayments Advances Of Federal Home Loan Bank Borrowings NetRepaymentsAdvancesOfFederalHomeLoanBankBorrowings	-15121000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	-5000000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	1382000	USD
	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	-6000000	USD
	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	105279000	USD
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	52500000	USD
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3210000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3361000	USD
	bfst	Payments For Surrendered Shares Of Options Exercised PaymentsForSurrenderedSharesOfOptionsExercised	2276000	USD
	bfst	Payments For Surrendered Shares Of Options Exercised PaymentsForSurrenderedSharesOfOptionsExercised	4321000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	10923000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6999000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5461000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	203267000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	312315000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-67770000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	14523000	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
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	81361000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	103894000	USD
	bfst	Interest On Deposits InterestOnDeposits	10134000	USD
	bfst	Interest On Deposits InterestOnDeposits	12025000	USD
	bfst	Interest Paid On Borrowings Net InterestPaidOnBorrowingsNet	3137000	USD
	bfst	Interest Paid On Borrowings Net InterestPaidOnBorrowingsNet	3193000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	12540000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	3595000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-6136000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	9162000	USD
	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	-43000	USD
	bfst	Oci Equity Securities Availableforsale Unrealized Holding Gain Loss Before Adjustment And Tax OciEquitySecuritiesAvailableforsaleUnrealizedHoldingGainLossBeforeAdjustmentAndTax	407000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	1298000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-1924000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1343000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1227000	USD
	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	0	USD
	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	5970000	USD
	bfst	Noncash Or Part Noncash Acquisition Identifiable Assets Acquired NoncashOrPartNoncashAcquisitionIdentifiableAssetsAcquired	1343000	USD
	bfst	Noncash Or Part Noncash Acquisition Identifiable Assets Acquired NoncashOrPartNoncashAcquisitionIdentifiableAssetsAcquired	1331199000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	4300000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 NoncashOrPartNoncashAcquisitionIntangibleAssetsAcquired1	4211000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	6000	USD
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	1241858000	USD
	bfst	Noncash Or Part Noncash Acquisition Assets Acquired Liabilities Assumed NoncashOrPartNoncashAcquisitionAssetsAcquiredLiabilitiesAssumed	5637000	USD
	bfst	Noncash Or Part Noncash Acquisition Assets Acquired Liabilities Assumed NoncashOrPartNoncashAcquisitionAssetsAcquiredLiabilitiesAssumed	93552000	USD
	us-gaap	Notes Issued1 NotesIssued1	3927000	USD
	us-gaap	Notes Issued1 NotesIssued1	0	USD
	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 conform to the classifications adopted for reporting in <em style="font: inherit;">2021.</em> These reclassifications have <em style="font: inherit;">no</em> material effect on previously reported shareholders’ equity or net income.</p>
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	17000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	13583000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	358000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	640605000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	489447000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4012000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	18198000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	255000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	10311000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	9609000	USD
	us-gaap	Net Income Loss NetIncomeLoss	40068000	USD
	us-gaap	Net Income Loss NetIncomeLoss	16160000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20384879
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20613481
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20570506
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17356830
CY2021Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	128959
CY2020Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	90963
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	121838
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	52991
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20513838
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20704444
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20692344
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	17409821
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.51
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.95
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.93
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.50
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.94
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1027401000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	11357000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4267000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1034491000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	627380000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	507645000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	4267000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	68096000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	357000	USD
CY2020Q4	bfst	Loans Receivable Unpaid Principal Balance LoansReceivableUnpaidPrincipalBalance	430000000.0	USD
CY2021Q3	us-gaap	Servicing Asset ServicingAsset	1600000	USD
CY2020Q4	us-gaap	Servicing Asset ServicingAsset	1400000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	22024000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1251000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	626000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6747000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28146000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	833000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	68113000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	358000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	23258000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	23361000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	174646000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	176147000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	433530000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	438089000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	395967000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	396894000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	1027401000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	1034491000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3066236000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2991355000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28146000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	22024000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3038090000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2969331000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	6200000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	10200000	USD
CY2021Q3	bfst	Loans And Leases Receivable Reclassified From Overdraft LoansAndLeasesReceivableReclassifiedFromOverdraft	658000	USD
CY2020Q4	bfst	Loans And Leases Receivable Reclassified From Overdraft LoansAndLeasesReceivableReclassifiedFromOverdraft	623000	USD
CY2021Q3	bfst	Loans Receivable Unpaid Principal Balance LoansReceivableUnpaidPrincipalBalance	455400000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	27313000	USD
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	0	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13557000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3066236000	USD
CY2021Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13885000	USD
CY2021Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2997070000	USD
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	55281000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	12124000	USD
CY2020	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1963000	USD
CY2020	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	428000	USD
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	11435000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	22024000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1014000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	21010000	USD
CY2020Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	0	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2991355000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	13557000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2913538000	USD
CY2020Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	64260000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3066236000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2991355000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1000000.0	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1500000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	12600000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	9100000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3066236000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1030000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2991355000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	1523000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	240000	USD
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	335000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1962000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2161000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	833000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2402000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	11923000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	13797000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	10748000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	13885000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	15958000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	833000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	13150000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	3593000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	3738000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1014000	USD
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2855000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	9964000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	11314000	USD
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	11037000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	15052000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1014000	USD
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	13892000	USD
CY2020Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition	133621000	USD
CY2020Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	49828000	USD
CY2020Q2	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	83793000	USD
CY2020Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	-9202000	USD
CY2020Q2	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAtAcquisitionAtFairValue	74591000	USD
CY2020Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	15853000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	4780000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	910000	USD
	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Period Increase Decrease CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease	-2186000	USD
CY2021Q3	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	17537000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	150000	USD
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	34000	USD
CY2021Q3	bfst	Financing Receivable Accrued Interest Receivable Loans Deferrals FinancingReceivableAccruedInterestReceivableLoansDeferrals	6500000	USD
CY2020Q4	bfst	Financing Receivable Accrued Interest Receivable Loans Deferrals FinancingReceivableAccruedInterestReceivableLoansDeferrals	8400000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2100000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	2000000.0	USD
CY2021Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y1M6D
CY2021Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0282	pure
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	624000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	2224000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2089000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1892000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1768000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	5349000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	13946000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1310000	USD

Files In Submission

Name	View Source	Status
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0001437749-21-025284-index.html	Edgar Link	pending
0001437749-21-025284.txt	Edgar Link	pending
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R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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2021 Q4 Form 10-Q Financial Statement

#000143774921025284 Filed on November 04, 2021

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$BFST Business First Bancshares Inc Stock $bfst

2021 Q4 Form 10-Q Financial Statement

#000143774921025284 Filed on November 04, 2021

Income Statement

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Files In Submission

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