$BFIN
BankFinancial CORP Stock $bfin

$bfin Overview Financials Valuation SEC Filings Company Website

2021 Q3 Form 10-Q Financial Statement

#000143774921018011 Filed on July 30, 2021

Income Statement

Concept	2021 Q3	2021 Q2	2020 Q2
Revenue	$11.75M	$11.50M	$13.19M
YoY Change	-5.9%	-12.86%	-20.14%
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	$529.0K	$554.0K	$450.0K
YoY Change	20.23%	23.11%	-48.86%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$718.0K	$722.0K	$1.869M
YoY Change	-51.75%	-61.37%	-45.33%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$2.244M	$2.638M	$3.197M
YoY Change	-15.67%	-17.49%	190.64%
Income Tax	$600.0K	$712.0K	$845.0K
% Of Pretax Income	26.74%	26.99%	26.43%
Net Earnings	$1.644M	$1.926M	$2.352M
YoY Change	-15.61%	-18.11%	191.45%
Net Earnings / Revenue	13.99%	16.75%	17.83%
Basic Earnings Per Share	$0.12	$0.13
Diluted Earnings Per Share	$119.8K	$133.4K	$0.16
COMMON SHARES
Basic Shares Outstanding	13.83M	14.43M	15.04M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2021 Q3	2021 Q2	2020 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$543.3M	$554.9M	$444.2M
YoY Change	15.18%	24.92%	132.95%
Cash & Equivalents	$528.6M	$536.0M	$384.8M
Short-Term Investments	$14.69M	$18.88M	$59.44M
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$24.77M	$24.77M	$24.32M
YoY Change	2.19%	1.82%	-2.41%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$2.348M	$2.363M	$3.600M
YoY Change	-32.91%	-34.36%	-25.0%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.660B	$1.657B	$1.593B
YoY Change	3.44%	3.99%	3.86%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$9.923M	$11.50M	$10.60M
YoY Change	-9.79%	8.51%	-8.62%
Accrued Expenses	$5.169M	$5.460M	$5.500M
YoY Change	-2.47%	-0.73%	-12.7%
Deferred Revenue
YoY Change
Short-Term Debt			$0.00
YoY Change			-100.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$15.09M	$16.96M	$16.10M
YoY Change	-7.41%	5.35%	-13.9%
LONG-TERM LIABILITIES
Long-Term Debt	$19.58M	$19.57M	$0.00
YoY Change
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$19.58M	$19.57M	$0.00
YoY Change
TOTAL LIABILITIES
Total Short-Term Liabilities	$15.09M	$16.96M	$16.10M
Total Long-Term Liabilities	$19.58M	$19.57M	$0.00
Total Liabilities	$1.502B	$1.490B	$1.421B
YoY Change	4.85%	4.89%	4.28%
SHAREHOLDERS EQUITY
Retained Earnings	$65.50M	$65.23M	$63.32M
YoY Change	2.68%	3.01%	10.45%
Common Stock	$134.0K	$141.0K	$149.0K
YoY Change	-9.46%	-5.37%	-3.25%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$158.2M	$166.4M	$172.5M
YoY Change
Total Liabilities & Shareholders Equity	$1.660B	$1.657B	$1.593B
YoY Change	3.44%	3.99%	3.86%

Cashflow Statement

Concept	2021 Q3	2021 Q2	2020 Q2
OPERATING ACTIVITIES
Net Income	$1.644M	$1.926M	$2.352M
YoY Change	-15.61%	-18.11%	191.45%
Depreciation, Depletion And Amortization	$529.0K	$554.0K	$450.0K
YoY Change	20.23%	23.11%	-48.86%
Cash From Operating Activities	-$591.0K	$2.684M	$5.880M
YoY Change	-127.49%	-54.35%	-11.58%
INVESTING ACTIVITIES
Capital Expenditures	-$515.0K	-$539.0K	$540.0K
YoY Change	-256.06%	-199.81%	63.64%
Acquisitions
YoY Change
Other Investing Activities	-$10.08M	$1.546M	$69.86M
YoY Change	-130.21%	-97.79%	117.84%
Cash From Investing Activities	-$10.59M	$1.007M	$69.34M
YoY Change	-132.09%	-98.55%	118.46%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	3.764M	33.76M	139.6M
YoY Change	-61.32%	-75.82%	-1173.1%
NET CHANGE
Cash From Operating Activities	-591.0K	2.684M	5.880M
Cash From Investing Activities	-10.59M	1.007M	69.34M
Cash From Financing Activities	3.764M	33.76M	139.6M
Net Change In Cash	-7.421M	37.45M	214.8M
YoY Change	-116.53%	-82.57%	746.45%
FREE CASH FLOW
Cash From Operating Activities	-$591.0K	$2.684M	$5.880M
Capital Expenditures	-$515.0K	-$539.0K	$540.0K
Free Cash Flow	-$76.00K	$3.223M	$5.340M
YoY Change	-104.18%	-39.64%	-15.51%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	41000	USD
CY2021Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	13828522
CY2021Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	6857000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7751000	USD
CY2021Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2021Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000
CY2021Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2021Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2021Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000
CY2021Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	14118720
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	14769765
CY2020Q2	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	181640
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.10
CY2021Q2	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	504939
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.10
	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	387836
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	651045
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2020Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue	1200000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	USD
CY2020Q2	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
CY2020Q2	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	pure
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	pure
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	pure
	bfin	Foreclosed Assets Valuation Adjustments ForeclosedAssetsValuationAdjustments	-281000	USD
	bfin	Foreclosed Assets Valuation Adjustments ForeclosedAssetsValuationAdjustments	-0	USD
CY2021Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	12185000	USD
CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	14115000	USD
CY2021Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	523851000	USD
CY2020Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	489381000	USD
CY2021Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	536036000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	503496000	USD
CY2021Q2	us-gaap	Marketable Securities MarketableSecurities	18883000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	23829000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1032159000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1002578000	USD
CY2021Q2	us-gaap	Foreclosed Assets ForeclosedAssets	1702000	USD
CY2020Q4	us-gaap	Foreclosed Assets ForeclosedAssets	157000	USD
CY2021Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	7490000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	7490000	USD
CY2021Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24765000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24675000	USD
CY2021Q2	us-gaap	Interest Receivable InterestReceivable	5300000	USD
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	3941000	USD
CY2021Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	19066000	USD
CY2020Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	19015000	USD
CY2021Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2363000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2741000	USD
CY2021Q2	us-gaap	Other Assets OtherAssets	8858000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	8920000	USD
CY2021Q2	us-gaap	Assets Assets	1656622000	USD
CY2020Q4	us-gaap	Assets Assets	1596842000	USD
CY2021Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	325294000	USD
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	326188000	USD
CY2021Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	1113280000	USD
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	1067356000	USD
CY2021Q2	us-gaap	Deposits Deposits	1438574000	USD
CY2020Q4	us-gaap	Deposits Deposits	1393544000	USD
CY2021Q2	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	5000000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	4000000	USD
CY2021Q2	us-gaap	Subordinated Debt SubordinatedDebt	19568000	USD
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	0	USD
CY2021Q2	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	10082000	USD
CY2020Q4	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	8670000	USD
CY2021Q2	bfin	Accrued Interest Payable And Other Liabilities AccruedInterestPayableAndOtherLiabilities	16962000	USD
CY2020Q4	bfin	Accrued Interest Payable And Other Liabilities AccruedInterestPayableAndOtherLiabilities	17698000	USD
CY2021Q2	us-gaap	Liabilities Liabilities	1490186000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	1423912000	USD
CY2021Q2	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2021Q2	us-gaap	Common Stock Value CommonStockValue	141000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	148000	USD
CY2021Q2	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	100877000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	107815000	USD
CY2021Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	65230000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	64754000	USD
CY2021Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	188000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	213000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	166436000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	172930000	USD
CY2021Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1656622000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1596842000	USD
CY2021Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	11192000	USD
CY2020Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	12669000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	22121000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	26280000	USD
CY2021Q2	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	52000	USD
CY2020Q2	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	271000	USD
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	106000	USD
CY2021Q2	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	141000	USD
CY2020Q2	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	82000	USD
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	196000	USD
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	145000	USD
CY2021Q2	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	5000	USD
CY2020Q2	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	11000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	17000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	40000	USD
CY2021Q2	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	0	USD
CY2020Q2	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	0	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	0	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-2000	USD
CY2021Q2	bfin	Noninterest Income From Trust NoninterestIncomeFromTrust	283000	USD
CY2020Q2	bfin	Noninterest Income From Trust NoninterestIncomeFromTrust	224000	USD
	bfin	Noninterest Income From Trust NoninterestIncomeFromTrust	617000	USD
	bfin	Noninterest Income From Trust NoninterestIncomeFromTrust	506000	USD
CY2021Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	30000	USD
CY2020Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	9000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	51000	USD
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	575000	USD
CY2021Q2	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	253000	USD
CY2020Q2	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	254000	USD
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	518000	USD
	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	992000	USD
CY2021Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	11497000	USD
CY2020Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	13194000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	22745000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	27847000	USD
CY2021Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	552000	USD
CY2020Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1869000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1220000	USD
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4553000	USD
CY2021Q2	us-gaap	Interest Expense Debt InterestExpenseDebt	170000	USD
CY2020Q2	us-gaap	Interest Expense Debt InterestExpenseDebt	0	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	170000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	0	USD
CY2021Q2	us-gaap	Interest Expense InterestExpense	722000	USD
CY2020Q2	us-gaap	Interest Expense InterestExpense	1869000	USD
	us-gaap	Interest Expense InterestExpense	1390000	USD
	us-gaap	Interest Expense InterestExpense	4553000	USD
CY2021Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	10775000	USD
CY2020Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11325000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	21355000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	23294000	USD
CY2021Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-678000	USD
CY2020Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	42000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-1013000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	513000	USD
CY2021Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	11453000	USD
CY2020Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	11283000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	22368000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	22781000	USD
CY2021Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	800000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	736000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1538000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1623000	USD
CY2021Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	167000	USD
CY2020Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	101000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	265000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	208000	USD
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	1426000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	1163000	USD
	us-gaap	Noninterest Income NoninterestIncome	2684000	USD
	us-gaap	Noninterest Income NoninterestIncome	2561000	USD
CY2021Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	5558000	USD
CY2020Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	5168000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11029000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	10686000	USD
CY2021Q2	us-gaap	Occupancy Net OccupancyNet	1951000	USD
CY2020Q2	us-gaap	Occupancy Net OccupancyNet	1723000	USD
	us-gaap	Occupancy Net OccupancyNet	4089000	USD
	us-gaap	Occupancy Net OccupancyNet	3523000	USD
CY2021Q2	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	179000	USD
CY2020Q2	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	118000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	375000	USD
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	270000	USD
CY2021Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	653000	USD
CY2020Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	808000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1311000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1672000	USD
CY2021Q2	us-gaap	Professional Fees ProfessionalFees	343000	USD
CY2020Q2	us-gaap	Professional Fees ProfessionalFees	289000	USD
	us-gaap	Professional Fees ProfessionalFees	713000	USD
	us-gaap	Professional Fees ProfessionalFees	602000	USD
CY2021Q2	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	442000	USD
CY2020Q2	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	284000	USD
	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	842000	USD
	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	587000	USD
CY2021Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0	USD
CY2020Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21000	USD
CY2021Q2	us-gaap	Noninterest Expense Transfer Agent And Custodian Fees NoninterestExpenseTransferAgentAndCustodianFees	8000	USD
CY2020Q2	us-gaap	Noninterest Expense Transfer Agent And Custodian Fees NoninterestExpenseTransferAgentAndCustodianFees	57000	USD
	us-gaap	Noninterest Expense Transfer Agent And Custodian Fees NoninterestExpenseTransferAgentAndCustodianFees	49000	USD
	us-gaap	Noninterest Expense Transfer Agent And Custodian Fees NoninterestExpenseTransferAgentAndCustodianFees	97000	USD
CY2021Q2	bfin	Revenue Expense From Foreclosed Operations RevenueExpenseFromForeclosedOperations	-232000	USD
CY2020Q2	bfin	Revenue Expense From Foreclosed Operations RevenueExpenseFromForeclosedOperations	-7000	USD
	bfin	Revenue Expense From Foreclosed Operations RevenueExpenseFromForeclosedOperations	-285000	USD
	bfin	Revenue Expense From Foreclosed Operations RevenueExpenseFromForeclosedOperations	10000	USD
CY2021Q2	bfin	Federal Deposit Insurance Corporation Premium Expense Income FederalDepositInsuranceCorporationPremiumExpenseIncome	114000	USD
CY2020Q2	bfin	Federal Deposit Insurance Corporation Premium Expense Income FederalDepositInsuranceCorporationPremiumExpenseIncome	102000	USD
	bfin	Federal Deposit Insurance Corporation Premium Expense Income FederalDepositInsuranceCorporationPremiumExpenseIncome	220000	USD
	bfin	Federal Deposit Insurance Corporation Premium Expense Income FederalDepositInsuranceCorporationPremiumExpenseIncome	136000	USD
CY2021Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	761000	USD
CY2020Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	686000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1508000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1293000	USD
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	10241000	USD
CY2020Q2	us-gaap	Noninterest Expense NoninterestExpense	9249000	USD
	us-gaap	Noninterest Expense NoninterestExpense	20428000	USD
	us-gaap	Noninterest Expense NoninterestExpense	18877000	USD
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2638000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	3197000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	4624000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6465000	USD
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	712000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	845000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1229000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1695000	USD
CY2021Q2	us-gaap	Profit Loss ProfitLoss	1926000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	2352000	USD
	us-gaap	Profit Loss ProfitLoss	3395000	USD
	us-gaap	Profit Loss ProfitLoss	4770000	USD
CY2021Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.13
CY2020Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.16
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.23
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.32
CY2021Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	14433748
CY2020Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	14978757
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	14577958
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	15092244
CY2021Q2	us-gaap	Profit Loss ProfitLoss	1926000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	2352000	USD
	us-gaap	Profit Loss ProfitLoss	3395000	USD
	us-gaap	Profit Loss ProfitLoss	4770000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-28000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	108000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-35000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	11000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-8000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	28000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-10000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	2000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-20000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	80000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-25000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9000	USD
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1906000	USD
CY2020Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2432000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	3370000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4779000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	172995000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	2352000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	80000	USD
CY2020Q2	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1474000	USD
CY2020Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1499000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	172454000	USD
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	171433000	USD
CY2021Q2	us-gaap	Profit Loss ProfitLoss	1926000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-20000	USD
CY2021Q2	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	5457000	USD
CY2021Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1446000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	166436000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	174372000	USD
	us-gaap	Profit Loss ProfitLoss	4770000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-27110000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3676000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	3021000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	172454000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	172930000	USD
	us-gaap	Profit Loss ProfitLoss	3395000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-25000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	6945000	USD
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	2919000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	166436000	USD
	us-gaap	Profit Loss ProfitLoss	3395000	USD
	us-gaap	Profit Loss ProfitLoss	4770000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-1013000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	513000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	1001000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	877000	USD
	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	-516000	USD
	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	-454000	USD
	bfin	Gain Loss On Sale Of Foreclosed Assets GainLossOnSaleOfForeclosedAssets	51000	USD
	bfin	Gain Loss On Sale Of Foreclosed Assets GainLossOnSaleOfForeclosedAssets	30000	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-0	USD
	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-2000	USD
	bfin	Foreclosed Assets Valuation Adjustments ForeclosedAssetsValuationAdjustments	-281000	USD
	bfin	Foreclosed Assets Valuation Adjustments ForeclosedAssetsValuationAdjustments	-0	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	51000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	41000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1359000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-116000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-530000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2316000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-736000	USD
	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-2539000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2513000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	6438000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	10412000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	35318000	USD
	bfin	Proceeds From Principal Repayments Of Investments ProceedsFromPrincipalRepaymentsOfInvestments	699000	USD
	bfin	Proceeds From Principal Repayments Of Investments ProceedsFromPrincipalRepaymentsOfInvestments	1386000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	6200000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	35940000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	28682000	USD
	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-85164000	USD
	bfin	Payments For Loan Participation PaymentsForLoanParticipation	5000000	USD
	bfin	Payments For Loan Participation PaymentsForLoanParticipation	-0	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	2698000	USD
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	95000	USD
	bfin	Payments To Acquire Premises And Equipment Net PaymentsToAcquirePremisesAndEquipmentNet	1037000	USD
	bfin	Payments To Acquire Premises And Equipment Net PaymentsToAcquirePremisesAndEquipmentNet	795000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	85228000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	45030000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	103398000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	1000000	USD
	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	3939000	USD
	bfin	Net Change In Advance Payments By Borrowers For Taxes And Insurance NetChangeInAdvancePaymentsByBorrowersForTaxesAndInsurance	1412000	USD
	bfin	Net Change In Advance Payments By Borrowers For Taxes And Insurance NetChangeInAdvancePaymentsByBorrowersForTaxesAndInsurance	2134000	USD
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	20000000	USD
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	441000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	-0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	6945000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3676000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2919000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3021000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	57137000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	102774000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	32540000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	194440000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	503496000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	190325000	USD
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	536036000	USD
CY2020Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	384765000	USD
	us-gaap	Interest Paid Net InterestPaidNet	1234000	USD
	us-gaap	Interest Paid Net InterestPaidNet	4564000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1831000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	226000	USD
	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	0	USD
	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	8000	USD
	bfin	Loans Transferred To Foreclosed Assets LoansTransferredToForeclosedAssets	4473000	USD
	bfin	Loans Transferred To Foreclosed Assets LoansTransferredToForeclosedAssets	33000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	866000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	111000	USD
	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"><i><b>Use of Estimates</b></i>: The preparation of the consolidated financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates and assumptions are based on the best available information, actual information, actual results could differ from those estimates.</p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p>
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"><i><b>Reclassifications</b></i>: Certain reclassifications have been made in the prior period’s financial statements to conform them to the current period’s presentation.</p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;">These unaudited consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form <em style="font: inherit;">10</em>-K for the year ended <em style="font: inherit;"> December 31, 2020</em>, as filed with the Securities and Exchange Commission.</p> <p style="font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:justify;"> </p>
CY2021Q2	us-gaap	Profit Loss ProfitLoss	1926000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	2352000	USD
	us-gaap	Profit Loss ProfitLoss	3395000	USD
	us-gaap	Profit Loss ProfitLoss	4770000	USD
CY2021Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	14433748
CY2020Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	14978757
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	14577958
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	15092244
CY2021Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.13
CY2020Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.16
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.23
	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.32
CY2021Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	18627000	USD
CY2021Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	256000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7751000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1032159000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1002578000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	28000	USD
CY2021Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	6829000	USD
CY2021Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	-0	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	18883000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	23538000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	292000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	23829000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	11306000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	11309000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	18627000	USD
CY2021Q2	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	18883000	USD
CY2021Q2	us-gaap	Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue	1200000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1039161000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1009958000	USD
CY2021Q2	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-145000	USD
CY2020Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	371000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	6857000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	6857000	USD
CY2021Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	2290000	USD
CY2021Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1036871000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1039161000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	145000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	6857000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1032159000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	28000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	7723000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7751000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	2534000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1007424000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1009958000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	371000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7751000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1002578000	USD
CY2021Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7395000	USD
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CY2021Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	2185000	USD
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CY2021Q1	us-gaap	Foreclosed Assets ForeclosedAssets	4630000	USD
CY2020Q1	us-gaap	Foreclosed Assets ForeclosedAssets	110000	USD
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CY2019Q4	us-gaap	Foreclosed Assets ForeclosedAssets	186000	USD
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CY2020Q2	bfin	Foreclosed Assets Additions ForeclosedAssetsAdditions	33000	USD
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	bfin	Foreclosed Assets Valuation Adjustments ForeclosedAssetsValuationAdjustments	-281000	USD
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CY2021Q2	us-gaap	Foreclosed Assets ForeclosedAssets	1702000	USD
CY2020Q2	us-gaap	Foreclosed Assets ForeclosedAssets	143000	USD
CY2021Q2	us-gaap	Foreclosed Assets ForeclosedAssets	1702000	USD
CY2020Q2	us-gaap	Foreclosed Assets ForeclosedAssets	143000	USD
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CY2020Q1	bfin	Foreclosed Assets Valuation Allowance ForeclosedAssetsValuationAllowance	0	USD
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CY2021Q2	bfin	Foreclosed Assets Valuation Allowance Amounts Applied ForeclosedAssetsValuationAllowanceAmountsApplied	0	USD
CY2020Q2	bfin	Foreclosed Assets Valuation Allowance Amounts Applied ForeclosedAssetsValuationAllowanceAmountsApplied	0	USD
	bfin	Foreclosed Assets Valuation Allowance Amounts Applied ForeclosedAssetsValuationAllowanceAmountsApplied	0	USD
CY2021Q2	bfin	Foreclosed Assets Valuation Allowance ForeclosedAssetsValuationAllowance	281000	USD
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CY2020Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	221000	USD
CY2020Q2	bfin	Foreclosed Assets Valuation Allowance ForeclosedAssetsValuationAllowance	0	USD
CY2021Q2	bfin	Foreclosed Assets Valuation Allowance ForeclosedAssetsValuationAllowance	281000	USD
CY2020Q2	bfin	Foreclosed Assets Valuation Allowance ForeclosedAssetsValuationAllowance	0	USD
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CY2021Q2	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	108000	USD
CY2020Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	187000	USD
CY2021Q2	bfin	Operating Lease Right Of Use Asset Gross OperatingLeaseRightOfUseAssetGross	6805000	USD
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CY2021Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y3M18D
CY2021Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0283	pure
CY2021Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	260000	USD
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CY2021Q2	us-gaap	Short Term Lease Cost ShortTermLeaseCost	43000	USD
CY2020Q2	us-gaap	Short Term Lease Cost ShortTermLeaseCost	41000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	92000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	71000	USD
CY2021Q2	us-gaap	Sublease Income SubleaseIncome	7000	USD
CY2020Q2	us-gaap	Sublease Income SubleaseIncome	20000	USD
	us-gaap	Sublease Income SubleaseIncome	22000	USD
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CY2021Q2	us-gaap	Lease Cost LeaseCost	296000	USD
CY2020Q2	us-gaap	Lease Cost LeaseCost	242000	USD
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CY2021Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	275000	USD
CY2020Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	238000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	516000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	471000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1230000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	1297000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	962000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	543000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	510000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	1961000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	6503000	USD
CY2021Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1043000	USD
CY2021Q2	us-gaap	Federal Home Loan Bank Advances Interest Rate FederalHomeLoanBankAdvancesInterestRate	0	pure
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CY2020Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary By Interest Rate Type Fixed Rate Under One Year FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear	4000000	USD
CY2021Q2	us-gaap	Subordinated Debt SubordinatedDebt	19568000	USD
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CY2021Q2	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.0250	pure
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CY2021Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	18883000	USD
CY2021Q2	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	5000	USD
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	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	17000	USD
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CY2021Q2	bfin	Impaired Loans Fair Value Disclosure ImpairedLoansFairValueDisclosure	296000	USD
CY2020Q4	bfin	Impaired Loans Fair Value Disclosure ImpairedLoansFairValueDisclosure	28000	USD
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CY2021Q2	bfin	Foreclosed Assets Gross ForeclosedAssetsGross	2000000.0	USD
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CY2021Q2	us-gaap	Foreclosed Assets ForeclosedAssets	1700000	USD
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CY2021Q2	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	141000	USD
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CY2021Q2	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	0	USD
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CY2021Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	167000	USD
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CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	1426000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	1163000	USD
	us-gaap	Noninterest Income NoninterestIncome	2684000	USD
	us-gaap	Noninterest Income NoninterestIncome	2561000	USD

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$BFIN
BankFinancial CORP Stock $bfin

2021 Q3 Form 10-Q Financial Statement

#000143774921018011 Filed on July 30, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BFIN BankFinancial CORP Stock $bfin

2021 Q3 Form 10-Q Financial Statement

#000143774921018011 Filed on July 30, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BFIN
BankFinancial CORP Stock $bfin