$FBIZ
FIRST BUSINESS FINANCIAL SERVICES, INC. Stock $fbiz

$fbiz Overview Financials Valuation SEC Filings Company Website

2022 Q3 Form 10-Q Financial Statement

#000152195122000051 Filed on July 29, 2022

Income Statement

Concept	2022 Q3	2022 Q2	2022 Q1
Revenue	$31.79M	$27.03M	$24.24M
YoY Change	32.36%	9.89%	1.8%
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	$1.063M	$965.0K	$1.060M
YoY Change	25.06%	8.43%	10.42%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$5.902M	$3.371M	$2.809M
YoY Change	111.47%	14.39%	-4.55%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$14.04M	$14.80M	$10.84M
YoY Change	16.84%	37.74%	-15.25%
Income Tax	$3.215M	$3.599M	$2.172M
% Of Pretax Income	22.9%	24.31%	20.03%
Net Earnings	$10.83M	$11.20M	$8.672M
YoY Change	17.7%	36.05%	-10.88%
Net Earnings / Revenue	34.06%	41.45%	35.78%
Basic Earnings Per Share	$1.25	$1.29	$1.02
Diluted Earnings Per Share	$1.25	$1.29	$1.02
COMMON SHARES
Basic Shares Outstanding	8.476M shares	8.226M shares	8.232M shares
Diluted Shares Outstanding	8.231M shares	8.226M shares	8.232M shares

Balance Sheet

Concept	2022 Q3	2022 Q2	2022 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$111.0M	$95.48M	$95.60M
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	$3.143M	$1.899M	$1.621M
YoY Change	84.88%	8.7%	-15.7%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$29.10M	$22.71M	$17.40M
YoY Change	57.27%	34.35%	13.73%
Other Assets	$10.11M	$7.870M	$8.100M
YoY Change	106.33%	7.81%	12.5%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.851B	$2.777B	$2.724B
YoY Change	10.31%	-3.09%	3.94%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$16.97M	$13.56M	$8.300M
YoY Change	30.52%	21.04%	-11.7%
Accrued Expenses	$6.827M	$7.207M	$7.600M
YoY Change	17.71%	20.12%	26.67%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$23.79M	$20.76M	$15.90M
YoY Change	26.56%	20.72%	3.25%
LONG-TERM LIABILITIES
Long-Term Debt	$42.50M	$42.54M	$53.10M
YoY Change	-8.41%	0.33%	24.36%
Other Long-Term Liabilities	$66.16M	$40.36M	$25.00M
YoY Change	107.4%	11.79%	-15.54%
Total Long-Term Liabilities	$108.7M	$82.90M	$78.10M
YoY Change	38.77%	5.6%	8.02%
TOTAL LIABILITIES
Total Short-Term Liabilities	$23.79M	$20.76M	$15.90M
Total Long-Term Liabilities	$108.7M	$82.90M	$78.10M
Total Liabilities	$2.598B	$2.527B	$2.479B
YoY Change	10.12%	-4.43%	3.03%
SHAREHOLDERS EQUITY
Retained Earnings	$195.2M	$186.3M	$177.0M
YoY Change	19.81%	19.96%	19.11%
Common Stock	$86.90M	$86.22M	$85.54M
YoY Change	2.17%	2.11%	2.09%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$24.53M	$23.00M	$21.64M
YoY Change	15.34%	31.27%	28.19%
Treasury Stock Shares	938.8K shares	892.6K shares	851.6K shares
Shareholders Equity	$253.0M	$249.9M	$245.1M
YoY Change
Total Liabilities & Shareholders Equity	$2.851B	$2.777B	$2.724B
YoY Change	10.31%	-3.09%	3.94%

Cashflow Statement

Concept	2022 Q3	2022 Q2	2022 Q1
OPERATING ACTIVITIES
Net Income	$10.83M	$11.20M	$8.672M
YoY Change	17.7%	36.05%	-10.88%
Depreciation, Depletion And Amortization	$1.063M	$965.0K	$1.060M
YoY Change	25.06%	8.43%	10.42%
Cash From Operating Activities	$14.61M	$14.68M	$2.098M
YoY Change	49.26%	80.31%	-69.28%
INVESTING ACTIVITIES
Capital Expenditures	-$1.378M	-$409.0K	-$60.00K
YoY Change	1622.5%	718.0%	-33.33%
Acquisitions
YoY Change
Other Investing Activities	-$36.23M	-$38.93M	-$40.03M
YoY Change	2583.48%	-140.78%	-49.58%
Cash From Investing Activities	-$37.61M	-$39.34M	-$40.09M
YoY Change	2511.46%	-141.22%	-49.57%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$608.0K
YoY Change			86.5%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	38.47M	24.55M	$76.48M
YoY Change	-113.37%	-89.21%	2.48%
NET CHANGE
Cash From Operating Activities	14.61M	14.68M	$2.098M
Cash From Investing Activities	-37.61M	-39.34M	-$40.09M
Cash From Financing Activities	38.47M	24.55M	$76.48M
Net Change In Cash	15.48M	-116.0K	$38.49M
YoY Change	-105.54%	-100.04%	1858.93%
FREE CASH FLOW
Cash From Operating Activities	$14.61M	$14.68M	$2.098M
Capital Expenditures	-$1.378M	-$409.0K	-$60.00K
Free Cash Flow	$15.99M	$15.09M	$2.158M
YoY Change	62.02%	84.2%	-68.81%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001521951
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2022-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-34095
	dei	Entity Registrant Name EntityRegistrantName	FIRST BUSINESS FINANCIAL SERVICES, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WI
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	39-1576570
	dei	Entity Address Address Line1 EntityAddressAddressLine1	401 Charmany Drive
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	53719
	dei	Entity Address City Or Town EntityAddressCityOrTown	Madison
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WI
	dei	City Area Code CityAreaCode	608
	dei	Local Phone Number LocalPhoneNumber	238-8008
	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
	dei	Trading Symbol TradingSymbol	FBIZ
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2022Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	8475953	shares
CY2022Q2	us-gaap	Cash And Due From Banks CashAndDueFromBanks	39251000	usd
CY2021Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	9697000	usd
CY2022Q2	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	56233000	usd
CY2021Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	47413000	usd
CY2022Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	95484000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	57110000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	208643000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	205702000	usd
CY2022Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	13968000	usd
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	19746000	usd
CY2022Q2	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	2256000	usd
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	3570000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24104000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24336000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2265996000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2215072000	usd
CY2022Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1899000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1694000	usd
CY2022Q2	us-gaap	Foreclosed Assets ForeclosedAssets	124000	usd
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	164000	usd
CY2022Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	5772000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4910000	usd
CY2022Q2	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	54324000	usd
CY2021Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	53600000	usd
CY2022Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	22959000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	13336000	usd
CY2022Q2	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	12262000	usd
CY2021Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	12268000	usd
CY2022Q2	us-gaap	Derivative Assets DerivativeAssets	44461000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	26343000	usd
CY2022Q2	us-gaap	Other Assets OtherAssets	48868000	usd
CY2021Q4	us-gaap	Other Assets OtherAssets	39390000	usd
CY2022Q2	us-gaap	Assets Assets	2777016000	usd
CY2021Q4	us-gaap	Assets Assets	2652905000	usd
CY2022Q2	us-gaap	Deposits Deposits	1869331000	usd
CY2021Q4	us-gaap	Deposits Deposits	1957923000	usd
CY2022Q2	fbiz	Federal Home Loan Bank And Other Borrowings FederalHomeLoanBankAndOtherBorrowings	596642000	usd
CY2021Q4	fbiz	Federal Home Loan Bank And Other Borrowings FederalHomeLoanBankAndOtherBorrowings	403451000	usd
CY2022Q2	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	0	usd
CY2021Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	10076000	usd
CY2022Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	7207000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	5406000	usd
CY2022Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	40357000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	28283000	usd
CY2022Q2	us-gaap	Other Liabilities OtherLiabilities	13556000	usd
CY2021Q4	us-gaap	Other Liabilities OtherLiabilities	15344000	usd
CY2022Q2	us-gaap	Liabilities Liabilities	2527093000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	2420483000	usd
CY2022Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.07
CY2021	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.07
CY2021Q4	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1000
CY2022Q2	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1000
CY2022Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2500000	shares
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2500000	shares
CY2022Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	12500	shares
CY2022Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	12500	shares
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q2	us-gaap	Preferred Stock Value PreferredStockValue	11992000	usd
CY2021Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	25000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	25000000	shares
CY2022Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	9367337	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	9326361	shares
CY2022Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	8474699	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	8457564	shares
CY2022Q2	us-gaap	Common Stock Value CommonStockValue	94000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	93000	usd
CY2022Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	86123000	usd
CY2021Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	85797000	usd
CY2022Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	186302000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	170020000	usd
CY2022Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-11588000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1457000	usd
CY2022Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	892638	shares
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	868797	shares
CY2022Q2	us-gaap	Treasury Stock Value TreasuryStockValue	23000000	usd
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	22031000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	249923000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	232422000	usd
CY2022Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2777016000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2652905000	usd
CY2022Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	25687000	usd
CY2021Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	23591000	usd
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	48759000	usd
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	46386000	usd
CY2022Q2	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	1064000	usd
CY2021Q2	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	816000	usd
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	2039000	usd
	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	1669000	usd
CY2022Q2	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	280000	usd
CY2021Q2	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	192000	usd
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	468000	usd
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	351000	usd
CY2022Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	27031000	usd
CY2021Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	24599000	usd
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	51266000	usd
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	48406000	usd
CY2022Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1058000	usd
CY2021Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	943000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1824000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1962000	usd
CY2022Q2	fbiz	Interest Expense Federal Home Loan Bank And Other Borrowings InterestExpenseFederalHomeLoanBankAndOtherBorrowings	2313000	usd
CY2021Q2	fbiz	Interest Expense Federal Home Loan Bank And Other Borrowings InterestExpenseFederalHomeLoanBankAndOtherBorrowings	1727000	usd
	fbiz	Interest Expense Federal Home Loan Bank And Other Borrowings InterestExpenseFederalHomeLoanBankAndOtherBorrowings	3851000	usd
	fbiz	Interest Expense Federal Home Loan Bank And Other Borrowings InterestExpenseFederalHomeLoanBankAndOtherBorrowings	3377000	usd
CY2022Q2	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	0	usd
CY2021Q2	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	277000	usd
	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	504000	usd
	us-gaap	Interest Expense Junior Subordinated Debentures InterestExpenseJuniorSubordinatedDebentures	552000	usd
CY2022Q2	us-gaap	Interest Expense InterestExpense	3371000	usd
CY2021Q2	us-gaap	Interest Expense InterestExpense	2947000	usd
	us-gaap	Interest Expense InterestExpense	6179000	usd
	us-gaap	Interest Expense InterestExpense	5891000	usd
CY2022Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	23660000	usd
CY2021Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	21652000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	45087000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	42515000	usd
CY2022Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-3727000	usd
CY2021Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-958000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-4582000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-3026000	usd
CY2022Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	27387000	usd
CY2021Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	22610000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	49669000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	45541000	usd
CY2022Q2	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	2852000	usd
CY2021Q2	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	2744000	usd
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	5693000	usd
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	5151000	usd
CY2022Q2	us-gaap	Gain Loss On Sale Of Other Loans And Leases GainLossOnSaleOfOtherLoansAndLeases	951000	usd
CY2021Q2	us-gaap	Gain Loss On Sale Of Other Loans And Leases GainLossOnSaleOfOtherLoansAndLeases	1203000	usd
	us-gaap	Gain Loss On Sale Of Other Loans And Leases GainLossOnSaleOfOtherLoansAndLeases	1537000	usd
	us-gaap	Gain Loss On Sale Of Other Loans And Leases GainLossOnSaleOfOtherLoansAndLeases	2281000	usd
CY2022Q2	fbiz	Revenuefrom Contractwith Customer Including Assessed Tax Service Chargeson Deposits RevenuefromContractwithCustomerIncludingAssessedTaxServiceChargesonDeposits	1041000	usd
CY2021Q2	fbiz	Revenuefrom Contractwith Customer Including Assessed Tax Service Chargeson Deposits RevenuefromContractwithCustomerIncludingAssessedTaxServiceChargesonDeposits	941000	usd
	fbiz	Revenuefrom Contractwith Customer Including Assessed Tax Service Chargeson Deposits RevenuefromContractwithCustomerIncludingAssessedTaxServiceChargesonDeposits	2040000	usd
	fbiz	Revenuefrom Contractwith Customer Including Assessed Tax Service Chargeson Deposits RevenuefromContractwithCustomerIncludingAssessedTaxServiceChargesonDeposits	1859000	usd
CY2022Q2	fbiz	Revenuefrom Contractwith Customer Including Assessed Tax Loan Fees RevenuefromContractwithCustomerIncludingAssessedTaxLoanFees	697000	usd
CY2021Q2	fbiz	Revenuefrom Contractwith Customer Including Assessed Tax Loan Fees RevenuefromContractwithCustomerIncludingAssessedTaxLoanFees	569000	usd
	fbiz	Revenuefrom Contractwith Customer Including Assessed Tax Loan Fees RevenuefromContractwithCustomerIncludingAssessedTaxLoanFees	1349000	usd
	fbiz	Revenuefrom Contractwith Customer Including Assessed Tax Loan Fees RevenuefromContractwithCustomerIncludingAssessedTaxLoanFees	1114000	usd
CY2022Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	350000	usd
CY2021Q2	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	350000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	698000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	699000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	usd
CY2021Q2	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	29000	usd
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	usd
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	29000	usd
CY2022Q2	fbiz	Swap Fee Income SwapFeeIncome	471000	usd
CY2021Q2	fbiz	Swap Fee Income SwapFeeIncome	0	usd
	fbiz	Swap Fee Income SwapFeeIncome	697000	usd
	fbiz	Swap Fee Income SwapFeeIncome	684000	usd
CY2022Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	510000	usd
CY2021Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	485000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2244000	usd
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1699000	usd
CY2022Q2	us-gaap	Noninterest Income NoninterestIncome	6872000	usd
CY2021Q2	us-gaap	Noninterest Income NoninterestIncome	6321000	usd
	us-gaap	Noninterest Income NoninterestIncome	14258000	usd
	us-gaap	Noninterest Income NoninterestIncome	13516000	usd
CY2022Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	14020000	usd
CY2021Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	13255000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	27658000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	25912000	usd
CY2022Q2	us-gaap	Occupancy Net OccupancyNet	568000	usd
CY2021Q2	us-gaap	Occupancy Net OccupancyNet	533000	usd
	us-gaap	Occupancy Net OccupancyNet	1123000	usd
	us-gaap	Occupancy Net OccupancyNet	1085000	usd
CY2022Q2	fbiz	Professional Fees Expense ProfessionalFeesExpense	1298000	usd
CY2021Q2	fbiz	Professional Fees Expense ProfessionalFeesExpense	913000	usd
	fbiz	Professional Fees Expense ProfessionalFeesExpense	2468000	usd
	fbiz	Professional Fees Expense ProfessionalFeesExpense	1778000	usd
CY2022Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	892000	usd
CY2021Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	798000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1673000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1569000	usd
CY2022Q2	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	670000	usd
CY2021Q2	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	511000	usd
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1170000	usd
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	902000	usd
CY2022Q2	us-gaap	Equipment Expense EquipmentExpense	235000	usd
CY2021Q2	us-gaap	Equipment Expense EquipmentExpense	261000	usd
	us-gaap	Equipment Expense EquipmentExpense	479000	usd
	us-gaap	Equipment Expense EquipmentExpense	506000	usd
CY2022Q2	fbiz	Computer Software Expense ComputerSoftwareExpense	1117000	usd
CY2021Q2	fbiz	Computer Software Expense ComputerSoftwareExpense	1129000	usd
	fbiz	Computer Software Expense ComputerSoftwareExpense	2199000	usd
	fbiz	Computer Software Expense ComputerSoftwareExpense	2244000	usd
CY2022Q2	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	296000	usd
CY2021Q2	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	280000	usd
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	610000	usd
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	642000	usd
CY2022Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	360000	usd
CY2021Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	504000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	900000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	876000	usd
CY2022Q2	us-gaap	Noninterest Expense NoninterestExpense	19456000	usd
CY2021Q2	us-gaap	Noninterest Expense NoninterestExpense	18184000	usd
	us-gaap	Noninterest Expense NoninterestExpense	38280000	usd
	us-gaap	Noninterest Expense NoninterestExpense	35514000	usd
CY2022Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	14803000	usd
CY2021Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	10747000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	25647000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	23543000	usd
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3599000	usd
CY2021Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2512000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5771000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5577000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	11204000	usd
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	8235000	usd
	us-gaap	Net Income Loss NetIncomeLoss	19876000	usd
	us-gaap	Net Income Loss NetIncomeLoss	17966000	usd
CY2022Q2	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	246000	usd
CY2021Q2	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	usd
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	246000	usd
	us-gaap	Preferred Stock Dividends And Other Adjustments PreferredStockDividendsAndOtherAdjustments	0	usd
CY2022Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10958000	usd
CY2021Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8235000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	19630000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	17966000	usd
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.95
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.31
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.95
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.31
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.08
CY2022Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.1975
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.395
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.36
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	11204000	usd
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	8235000	usd
	us-gaap	Net Income Loss NetIncomeLoss	19876000	usd
	us-gaap	Net Income Loss NetIncomeLoss	17966000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-7184000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	662000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-19665000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-1576000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	29000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	29000	usd
CY2022Q2	fbiz	Other Comprehensive Income Loss Amortizationof Net Unrealized Losses Transferredto Heldto Maturityfrom Availablefor Salebeforetax OtherComprehensiveIncomeLossAmortizationofNetUnrealizedLossesTransferredtoHeldtoMaturityfromAvailableforSalebeforetax	3000	usd
CY2021Q2	fbiz	Other Comprehensive Income Loss Amortizationof Net Unrealized Losses Transferredto Heldto Maturityfrom Availablefor Salebeforetax OtherComprehensiveIncomeLossAmortizationofNetUnrealizedLossesTransferredtoHeldtoMaturityfromAvailableforSalebeforetax	7000	usd
	fbiz	Other Comprehensive Income Loss Amortizationof Net Unrealized Losses Transferredto Heldto Maturityfrom Availablefor Salebeforetax OtherComprehensiveIncomeLossAmortizationofNetUnrealizedLossesTransferredtoHeldtoMaturityfromAvailableforSalebeforetax	8000	usd
	fbiz	Other Comprehensive Income Loss Amortizationof Net Unrealized Losses Transferredto Heldto Maturityfrom Availablefor Salebeforetax OtherComprehensiveIncomeLossAmortizationofNetUnrealizedLossesTransferredtoHeldtoMaturityfromAvailableforSalebeforetax	15000	usd
CY2022Q2	fbiz	Unrealized Gains On Interest Rate Swaps UnrealizedGainsOnInterestRateSwaps	2175000	usd
CY2021Q2	fbiz	Unrealized Gains On Interest Rate Swaps UnrealizedGainsOnInterestRateSwaps	-271000	usd
	fbiz	Unrealized Gains On Interest Rate Swaps UnrealizedGainsOnInterestRateSwaps	6044000	usd
	fbiz	Unrealized Gains On Interest Rate Swaps UnrealizedGainsOnInterestRateSwaps	1818000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-1281000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	94000	usd
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-3482000	usd
	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	58000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3725000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	275000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-10131000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	170000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	7479000	usd
CY2021Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	8510000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9745000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	18136000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	206162000	usd
CY2021Q1	us-gaap	Net Income Loss NetIncomeLoss	9731000	usd
CY2021Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-105000	usd
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	531000	usd
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	39000	usd
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
CY2021Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1541000	usd
CY2021Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	326000	usd
CY2021Q1	us-gaap	Stockholders Equity StockholdersEquity	214491000	usd
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	8235000	usd
CY2021Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	275000	usd
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	607000	usd
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	42000	usd
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
CY2021Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1556000	usd
CY2021Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	642000	usd
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	221452000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	232422000	usd
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	8672000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-6406000	usd
CY2022Q1	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	11992000	usd
CY2022Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	609000	usd
CY2022Q1	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	40000	usd
CY2022Q1	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	0	usd
CY2022Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.1975
CY2022Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1670000	usd
CY2022Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	608000	usd
CY2022Q1	us-gaap	Stockholders Equity StockholdersEquity	245051000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	11204000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3725000	usd
CY2022Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	645000	usd
CY2022Q2	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	35000	usd
CY2022Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	246000	usd
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-56000	usd
CY2022Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.1975
CY2022Q2	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1678000	usd
CY2022Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	1363000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	249923000	usd
	us-gaap	Net Income Loss NetIncomeLoss	19876000	usd
	us-gaap	Net Income Loss NetIncomeLoss	17966000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1695000	usd
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1359000	usd
	fbiz	Impairmentof Tax Credit Investments ImpairmentofTaxCreditInvestments	-351000	usd
	fbiz	Impairmentof Tax Credit Investments ImpairmentofTaxCreditInvestments	0	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-4582000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-3026000	usd
	fbiz	Derivative Credit Valuation Adjustment DerivativeCreditValuationAdjustment	0	usd
	fbiz	Derivative Credit Valuation Adjustment DerivativeCreditValuationAdjustment	-376000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	2025000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1845000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1254000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1138000	usd
	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	0	usd
	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	29000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	698000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	699000	usd
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	61278000	usd
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	48137000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	64129000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	53054000	usd
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	1537000	usd
	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	2281000	usd
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-20000	usd
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1000	usd
	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0	usd
	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	-78000	usd
	fbiz	Excess Tax Benefit Expense From Share Based Compensation Operating Activities ExcessTaxBenefitExpenseFromShareBasedCompensationOperatingActivities	-183000	usd
	fbiz	Excess Tax Benefit Expense From Share Based Compensation Operating Activities ExcessTaxBenefitExpenseFromShareBasedCompensationOperatingActivities	16000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	314000	usd
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	0	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	817000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	788000	usd
	us-gaap	Proceeds From Lease Payments ProceedsFromLeasePayments	90000	usd
	us-gaap	Proceeds From Lease Payments ProceedsFromLeasePayments	82000	usd
	us-gaap	Increase Decrease In Accounts Receivable And Other Operating Assets IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets	13814000	usd
	us-gaap	Increase Decrease In Accounts Receivable And Other Operating Assets IncreaseDecreaseInAccountsReceivableAndOtherOperatingAssets	1152000	usd
	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	13658000	usd
	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-1230000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	16777000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	14971000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	20185000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	31315000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	5761000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	3969000	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	14955000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	43231000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	35559000	usd
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	37000	usd
	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	0	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	46359000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-2444000	usd
	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	363000	usd
	us-gaap	Payments To Acquire Limited Partnership Interests PaymentsToAcquireLimitedPartnershipInterests	0	usd
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	usd
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	60000	usd
	fbiz	Distributionfromhistoricdevelopmententities Distributionfromhistoricdevelopmententities	282000	usd
	fbiz	Distributionfromhistoricdevelopmententities Distributionfromhistoricdevelopmententities	57000	usd
	fbiz	Payments To Acquire Low Income Housing Entities PaymentsToAcquireLowIncomeHousingEntities	5937000	usd
	fbiz	Payments To Acquire Low Income Housing Entities PaymentsToAcquireLowIncomeHousingEntities	1307000	usd
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	23370000	usd
	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	6314000	usd
	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	13746000	usd
	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	6440000	usd
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	469000	usd
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	135000	usd
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	usd
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	12000	usd
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	25000	usd
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	0	usd
	fbiz	Proceeds From Redemption Of Trust Ii Stock ProceedsFromRedemptionOfTrustIIStock	315000	usd
	fbiz	Proceeds From Redemption Of Trust Ii Stock ProceedsFromRedemptionOfTrustIIStock	0	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-79428000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	15937000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-88592000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	305191000	usd
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	1413844000	usd
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	510300000	usd
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	1228543000	usd
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	517000000	usd
	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	9090000	usd
	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	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	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	10076000	usd
	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	usd
	us-gaap	Proceeds From Repayments Of Notes Payable ProceedsFromRepaymentsOfNotesPayable	-3020000	usd
	us-gaap	Proceeds From Repayments Of Notes Payable ProceedsFromRepaymentsOfNotesPayable	7653000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3348000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3097000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	246000	usd
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	0	usd
	fbiz	Proceeds From Issuance Of Common Stock Under The Employee Stock Purchase Plan ProceedsFromIssuanceOfCommonStockUnderTheEmployeeStockPurchasePlan	75000	usd
	fbiz	Proceeds From Issuance Of Common Stock Under The Employee Stock Purchase Plan ProceedsFromIssuanceOfCommonStockUnderTheEmployeeStockPurchasePlan	81000	usd
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	11992000	usd
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1971000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	968000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	101025000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	302160000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	38374000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	333068000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	57110000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	56909000	usd
CY2022Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	95484000	usd
CY2021Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	389977000	usd
	us-gaap	Interest Paid Net InterestPaidNet	5707000	usd
	us-gaap	Interest Paid Net InterestPaidNet	7469000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-31000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	7658000	usd
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	316000	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	17000	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	149000	usd
	us-gaap	Use Of Estimates UseOfEstimates	Management of the Corporation is required to make estimates and assumptions which affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements as well as reported amounts of revenues and expenses during the reporting period. Actual results could differ significantly from those estimates. Material estimates that could significantly change in the near-term include the value of securities and interest rate swaps, level of the allowance for loan and lease losses, lease residuals, property under operating leases, goodwill, and income taxes.
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	Certain amounts in prior periods may have been reclassified to conform to the current presentation.
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	11204000	usd
CY2021Q2	us-gaap	Net Income Loss NetIncomeLoss	8235000	usd
	us-gaap	Net Income Loss NetIncomeLoss	19876000	usd
	us-gaap	Net Income Loss NetIncomeLoss	17966000	usd
CY2022Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	246000	usd
CY2021Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	0	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	246000	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	0	usd
CY2022Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	310000	usd
CY2021Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	238000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	547000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	493000	usd
CY2022Q2	fbiz	Basic Earnings Allocated To Common Shareholders BasicEarningsAllocatedToCommonShareholders	10648000	usd
CY2021Q2	fbiz	Basic Earnings Allocated To Common Shareholders BasicEarningsAllocatedToCommonShareholders	7997000	usd
	fbiz	Basic Earnings Allocated To Common Shareholders BasicEarningsAllocatedToCommonShareholders	19083000	usd
	fbiz	Basic Earnings Allocated To Common Shareholders BasicEarningsAllocatedToCommonShareholders	17473000	usd
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8225838	shares
CY2021Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8385069	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8245317	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8381868	shares
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.29
CY2021Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.95
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.31
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.08
CY2022Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	10648000	usd
CY2021Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	7997000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	19083000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	17473000	usd
	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	2634	shares
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8225838	shares
CY2021Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8385069	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8245317	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8381868	shares
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2021Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.95
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.31
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.08
CY2022Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	154002	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	187804	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	24.29
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	93130	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	23.57
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	63385	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	22.28
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	7760	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	23.24
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	209789	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	24.62
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	92945	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	30.02
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	90939	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	21.28
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	1807	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	25.60
CY2022Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	209988	shares
CY2022Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	28.45
CY2022Q2	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	4531000	usd
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y5M19D
CY2022Q2	fbiz	Employee Stock Purchase Plan Number Of Shares Authorized For Grant EmployeeStockPurchasePlanNumberOfSharesAuthorizedForGrant	250000	shares
CY2022Q2	fbiz	Employee Stock Purchase Plan Number Of Shares Available For Grant EmployeeStockPurchasePlanNumberOfSharesAvailableForGrant	238122	shares
CY2022Q2	us-gaap	Share Based Compensation ShareBasedCompensation	645000	usd
CY2021Q2	us-gaap	Share Based Compensation ShareBasedCompensation	607000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1254000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1138000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	228305000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	261000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	19923000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	208643000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	205699000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2072000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2069000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	205702000	usd
CY2022Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	13968000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	23000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	142000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	13849000	usd
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	19746000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	533000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	3000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	20276000	usd
CY2022Q2	fbiz	Numberofavailableforsalesecuritiessold Numberofavailableforsalesecuritiessold	0	securities
	fbiz	Numberofavailableforsalesecuritiessold Numberofavailableforsalesecuritiessold	0	securities
CY2021Q2	fbiz	Numberofavailableforsalesecuritiessold Numberofavailableforsalesecuritiessold	7000	securities
	fbiz	Numberofavailableforsalesecuritiessold Numberofavailableforsalesecuritiessold	7000	securities
CY2022Q2	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	39700000	usd
CY2021Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	70300000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	2757000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	2755000	usd
CY2022Q2	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	3962000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Debt Maturities Next Rolling Twelve Months Fair Value HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	3973000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	12882000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	12115000	usd
CY2022Q2	fbiz	Heldtomaturity Securities Debt Maturities Rolling Years Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearsTwoThroughFiveAmortizedCost	4130000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	4109000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	58532000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	53524000	usd
CY2022Q2	fbiz	Heldtomaturity Securities Debt Maturities Rolling Years Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearsSixThroughTenAmortizedCost	4940000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	4862000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	154134000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	140249000	usd
CY2022Q2	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	936000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Debt Maturities Rolling After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue	905000	usd
CY2022Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	228305000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	208643000	usd
CY2022Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	13968000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	13849000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	164	securities
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	11	securities
CY2021Q2	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0	usd
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0	usd
CY2022Q2	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0	usd
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings	0	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	166357000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	15594000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	23092000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	4329000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	189449000	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	19923000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	100580000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1826000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	6662000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	243000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	107242000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	2069000	usd
CY2022Q2	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	23	securities
CY2022Q2	fbiz	Heldto Maturity Securities Securitiesin Unrealized Loss Positions Qualitative Disclosures Numberof Positions12monthsorgreater HeldtoMaturitySecuritiesSecuritiesinUnrealizedLossPositionsQualitativeDisclosuresNumberofPositions12monthsorgreater	1	securities
CY2021Q2	us-gaap	Other Than Temporary Impairment Losses Investments Heldtomaturity Securities OtherThanTemporaryImpairmentLossesInvestmentsHeldtomaturitySecurities	0	usd
CY2022Q2	us-gaap	Other Than Temporary Impairment Losses Investments Heldtomaturity Securities OtherThanTemporaryImpairmentLossesInvestmentsHeldtomaturitySecurities	0	usd
	us-gaap	Other Than Temporary Impairment Losses Investments Heldtomaturity Securities OtherThanTemporaryImpairmentLossesInvestmentsHeldtomaturitySecurities	0	usd
	us-gaap	Other Than Temporary Impairment Losses Investments Heldtomaturity Securities OtherThanTemporaryImpairmentLossesInvestmentsHeldtomaturitySecurities	0	usd
CY2022Q2	fbiz	Sba Paycheck Protection Program Loans Outstanding Gross Amount SBAPaycheckProtectionProgramLoansOutstandingGrossAmount	8300000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	7303000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	124000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	268000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	18000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	7571000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	142000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	2291080000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	2240931000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24104000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24336000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	980000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1523000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2265996000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2215072000	usd
CY2022Q2	fbiz	Paycheck Protection Loans And Leases Receivable Deferred Income PaycheckProtectionLoansAndLeasesReceivableDeferredIncome	113000	usd
CY2021Q4	fbiz	Sba Paycheck Protection Program Loans Outstanding Gross Amount SBAPaycheckProtectionProgramLoansOutstandingGrossAmount	27900000	usd
CY2021Q4	fbiz	Sba Paycheck Protection Program Loans Outstanding Gross Amount SBAPaycheckProtectionProgramLoansOutstandingGrossAmount	27900000	usd
CY2021Q4	fbiz	Paycheck Protection Loans And Leases Receivable Deferred Income PaycheckProtectionLoansAndLeasesReceivableDeferredIncome	557000	usd
CY2022Q2	fbiz	Small Business Administration7a Loans SmallBusinessAdministration7aLoans	32927000	usd
CY2021Q4	fbiz	Small Business Administration7a Loans SmallBusinessAdministration7aLoans	33223000	usd
CY2022Q2	fbiz	Small Business Administration504 Loans SmallBusinessAdministration504Loans	38569000	usd
CY2021Q4	fbiz	Small Business Administration504 Loans SmallBusinessAdministration504Loans	41394000	usd
CY2022Q2	fbiz	Small Business Administration Express Loans SmallBusinessAdministrationExpressLoans	233000	usd
CY2021Q4	fbiz	Small Business Administration Express Loans SmallBusinessAdministrationExpressLoans	387000	usd
CY2022Q2	fbiz	Small Business Administration Paycheck Protection Program Loans SmallBusinessAdministrationPaycheckProtectionProgramLoans	8285000	usd
CY2021Q4	fbiz	Small Business Administration Paycheck Protection Program Loans SmallBusinessAdministrationPaycheckProtectionProgramLoans	27854000	usd
CY2022Q2	fbiz	Small Business Administration Loans SmallBusinessAdministrationLoans	80014000	usd
CY2021Q4	fbiz	Small Business Administration Loans SmallBusinessAdministrationLoans	102858000	usd
CY2021Q4	fbiz	Sba Loans Considered Impaired SBALoansConsideredImpaired	1700000	usd
CY2022Q2	fbiz	Guaranteed Portionof Sba Loans Soldto Third Parties Total GuaranteedPortionofSBALoansSoldtoThirdPartiesTotal	11900000	usd
CY2021Q2	fbiz	Guaranteed Portionof Sba Loans Soldto Third Parties Total GuaranteedPortionofSBALoansSoldtoThirdPartiesTotal	9000000	usd
CY2022Q2	fbiz	Sba Loans Considered Impaired SBALoansConsideredImpaired	944000	usd
	fbiz	Guaranteed Portionof Sba Loans Soldto Third Parties Total GuaranteedPortionofSBALoansSoldtoThirdPartiesTotal	17400000	usd
	fbiz	Guaranteed Portionof Sba Loans Soldto Third Parties Total GuaranteedPortionofSBALoansSoldtoThirdPartiesTotal	19600000	usd
CY2022Q2	fbiz	Totalamountofoutstanding Sb Aloanssold TotalamountofoutstandingSBAloanssold	95900000	usd
CY2021Q4	fbiz	Totalamountofoutstanding Sb Aloanssold TotalamountofoutstandingSBAloanssold	93000000	usd
CY2022Q2	fbiz	Loans And Leases Transferred To Third Parties Total Principal Amount LoansAndLeasesTransferredToThirdPartiesTotalPrincipalAmount	23000000	usd
CY2021Q2	fbiz	Loans And Leases Transferred To Third Parties Total Principal Amount LoansAndLeasesTransferredToThirdPartiesTotalPrincipalAmount	11800000	usd
	fbiz	Loans And Leases Transferred To Third Parties Total Principal Amount LoansAndLeasesTransferredToThirdPartiesTotalPrincipalAmount	45200000	usd
	fbiz	Loans And Leases Transferred To Third Parties Total Principal Amount LoansAndLeasesTransferredToThirdPartiesTotalPrincipalAmount	16900000	usd
	fbiz	Gain Loss Recognizedon Participation Interestin Originated Loans GainLossRecognizedonParticipationInterestinOriginatedLoans	0	usd
CY2022Q2	fbiz	Total Amount Of Outstanding Loans Transferred To Third Parties As Loan Participations TotalAmountOfOutstandingLoansTransferredToThirdPartiesAsLoanParticipations	199000000	usd
CY2021Q4	fbiz	Total Amount Of Outstanding Loans Transferred To Third Parties As Loan Participations TotalAmountOfOutstandingLoansTransferredToThirdPartiesAsLoanParticipations	195200000	usd
CY2022Q2	fbiz	Total Amount Of Loan Participations Remaining On Corporations Balance Sheet TotalAmountOfLoanParticipationsRemainingOnCorporationsBalanceSheet	320200000	usd
CY2021Q4	fbiz	Total Amount Of Loan Participations Remaining On Corporations Balance Sheet TotalAmountOfLoanParticipationsRemainingOnCorporationsBalanceSheet	314500000	usd
CY2022Q2	fbiz	Loans In The Participation Sold Portfolio Considered Impaired Gross Amount LoansInTheParticipationSoldPortfolioConsideredImpairedGrossAmount	0	usd
CY2021Q4	fbiz	Loans In The Participation Sold Portfolio Considered Impaired Gross Amount LoansInTheParticipationSoldPortfolioConsideredImpairedGrossAmount	0	usd
CY2021Q4	fbiz	Loan Participations Purchased On Corporations Balance Sheet LoanParticipationsPurchasedOnCorporationsBalanceSheet	0	usd
CY2022Q2	fbiz	Loan Participations Purchased On Corporations Balance Sheet LoanParticipationsPurchasedOnCorporationsBalanceSheet	0	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	2291080000	usd
CY2022Q2	fbiz	Category Rating As Percentage Of Total Loans And Leases CategoryRatingAsPercentageOfTotalLoansAndLeases	1.0000
CY2021Q4	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	2240931000	usd
CY2021Q4	fbiz	Category Rating As Percentage Of Total Loans And Leases CategoryRatingAsPercentageOfTotalLoansAndLeases	1.0000
CY2022Q2	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	2291080000	usd
CY2022Q2	fbiz	Financing Receivable Recorded Investment30 To59 Days Past Due Percent Of Portfolio FinancingReceivableRecordedInvestment30To59DaysPastDuePercentOfPortfolio	0.0087
CY2022Q2	fbiz	Financing Receivable Recorded Investment60 To89 Days Past Due Percent Of Portfolio FinancingReceivableRecordedInvestment60To89DaysPastDuePercentOfPortfolio	0.0003
CY2022Q2	fbiz	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due Percent Of Portfolio FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDuePercentOfPortfolio	0.0007
CY2022Q2	fbiz	Financing Receivable Recorded Investment Past Due Percent Of Portfolio FinancingReceivableRecordedInvestmentPastDuePercentOfPortfolio	0.0097
CY2022Q2	fbiz	Financing Receivable Recorded Investment Current Percent Of Portfolio FinancingReceivableRecordedInvestmentCurrentPercentOfPortfolio	0.9903
CY2022Q2	fbiz	Financing Receivable Recorded Investment Gross Percent Of Portfolio FinancingReceivableRecordedInvestmentGrossPercentOfPortfolio	1.0000
CY2021Q4	us-gaap	Loans And Leases Receivable Before Fees Gross LoansAndLeasesReceivableBeforeFeesGross	2240931000	usd
CY2021Q4	fbiz	Financing Receivable Recorded Investment30 To59 Days Past Due Percent Of Portfolio FinancingReceivableRecordedInvestment30To59DaysPastDuePercentOfPortfolio	0.0009
CY2021Q4	fbiz	Financing Receivable Recorded Investment60 To89 Days Past Due Percent Of Portfolio FinancingReceivableRecordedInvestment60To89DaysPastDuePercentOfPortfolio	0.0003
CY2021Q4	fbiz	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due Percent Of Portfolio FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDuePercentOfPortfolio	0.0007
CY2021Q4	fbiz	Financing Receivable Recorded Investment Past Due Percent Of Portfolio FinancingReceivableRecordedInvestmentPastDuePercentOfPortfolio	0.0019
CY2021Q4	fbiz	Financing Receivable Recorded Investment Current Percent Of Portfolio FinancingReceivableRecordedInvestmentCurrentPercentOfPortfolio	0.9981
CY2021Q4	fbiz	Financing Receivable Recorded Investment Gross Percent Of Portfolio FinancingReceivableRecordedInvestmentGrossPercentOfPortfolio	1.0000
CY2022Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	5585000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	6358000	usd
CY2022Q2	us-gaap	Foreclosed Assets ForeclosedAssets	124000	usd
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	164000	usd
CY2022Q2	fbiz	Total Nonperforming Assets TotalNonperformingAssets	5709000	usd
CY2021Q4	fbiz	Total Nonperforming Assets TotalNonperformingAssets	6522000	usd
CY2022Q2	fbiz	Financing Receivable Modifications Performing Troubled Debt Restructuring FinancingReceivableModificationsPerformingTroubledDebtRestructuring	188000	usd
CY2021Q4	fbiz	Financing Receivable Modifications Performing Troubled Debt Restructuring FinancingReceivableModificationsPerformingTroubledDebtRestructuring	217000	usd
CY2022Q2	fbiz	Impaired Assets ImpairedAssets	5897000	usd
CY2021Q4	fbiz	Impaired Assets ImpairedAssets	6739000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	0.0024
CY2021Q4	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	0.0028
CY2022Q2	fbiz	Ratio Of Total Nonperforming Assets To Gross Loans And Leases Plus Foreclosed Properties Net RatioOfTotalNonperformingAssetsToGrossLoansAndLeasesPlusForeclosedPropertiesNet	0.0025
CY2021Q4	fbiz	Ratio Of Total Nonperforming Assets To Gross Loans And Leases Plus Foreclosed Properties Net RatioOfTotalNonperformingAssetsToGrossLoansAndLeasesPlusForeclosedPropertiesNet	0.0029
CY2022Q2	fbiz	Ratio Of Total Nonperforming Assets To Total Assets RatioOfTotalNonperformingAssetsToTotalAssets	0.0021
CY2021Q4	fbiz	Ratio Of Total Nonperforming Assets To Total Assets RatioOfTotalNonperformingAssetsToTotalAssets	0.0025
CY2022Q2	fbiz	Ratio Of Allowance For Loan And Lease Losses To Total Gross Loans And Leases RatioOfAllowanceForLoanAndLeaseLossesToTotalGrossLoansAndLeases	0.0105
CY2021Q4	fbiz	Ratio Of Allowance For Loan And Lease Losses To Total Gross Loans And Leases RatioOfAllowanceForLoanAndLeaseLossesToTotalGrossLoansAndLeases	0.0109
CY2022Q2	fbiz	Ratio Of Allowance For Loan And Leases Losses To Non Accrual Loans And Leases RatioOfAllowanceForLoanAndLeasesLossesToNonAccrualLoansAndLeases	4.3158
CY2021Q4	fbiz	Ratio Of Allowance For Loan And Leases Losses To Non Accrual Loans And Leases RatioOfAllowanceForLoanAndLeasesLossesToNonAccrualLoansAndLeases	3.8276
CY2022Q2	fbiz	Non Accrual Troubled Debt Restructurings NonAccrualTroubledDebtRestructurings	615000	usd
CY2021Q4	fbiz	Non Accrual Troubled Debt Restructurings NonAccrualTroubledDebtRestructurings	627000	usd
CY2022Q2	fbiz	Specific Reserveson Troubled Debt Restructurings SpecificReservesonTroubledDebtRestructurings	138000	usd
CY2021Q4	fbiz	Specific Reserveson Troubled Debt Restructurings SpecificReservesonTroubledDebtRestructurings	134000	usd
CY2022Q2	fbiz	Unfunded Commitments Troubled Debt Restructurings UnfundedCommitmentsTroubledDebtRestructurings	0	usd
	fbiz	Impaired Financing Receivable With No Related Allowance Foregone Interest Income ImpairedFinancingReceivableWithNoRelatedAllowanceForegoneInterestIncome	154000	usd
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	812000	usd
CY2022Q2	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	loans
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	loans
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	loans
CY2022Q2	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	loans
CY2021Q2	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	loans
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	loans
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	269000	usd
CY2021Q2	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	269000	usd
CY2022Q2	fbiz	Numberof Short Term Loan Modifications NumberofShortTermLoanModifications	0	loans
CY2021Q4	fbiz	Numberof Short Term Loan Modifications NumberofShortTermLoanModifications	3	loans
CY2021Q4	fbiz	Gross Loansand Leases Outstanding Short Term Modification GrossLoansandLeasesOutstandingShortTermModification	293000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	4144000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	4288000	usd
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	4818000	usd
	fbiz	Impaired Financing Receivable With No Related Allowance Net Foregone Interest Income ImpairedFinancingReceivableWithNoRelatedAllowanceNetForegoneInterestIncome	-658000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1629000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	1629000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1254000	usd
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1191000	usd
	fbiz	Impaired Financing Receivable With Related Allowance Foregone Interest Income ImpairedFinancingReceivableWithRelatedAllowanceForegoneInterestIncome	52000	usd
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	1000	usd
	fbiz	Impaired Financing Receivable With Related Allowance Net Foregone Interest Income ImpairedFinancingReceivableWithRelatedAllowanceNetForegoneInterestIncome	51000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	5773000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	5917000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1254000	usd
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	6009000	usd
	fbiz	Impaired Financing Receivable Foregone Interest Income ImpairedFinancingReceivableForegoneInterestIncome	206000	usd
	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	813000	usd
	fbiz	Impaired Financing Receivable Net Foregone Interest Income ImpairedFinancingReceivableNetForegoneInterestIncome	-607000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	4419000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	4564000	usd
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	12754000	usd
CY2021	fbiz	Impaired Financing Receivable With No Related Allowance Foregone Interest Income ImpairedFinancingReceivableWithNoRelatedAllowanceForegoneInterestIncome	991000	usd
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	446000	usd
CY2021	fbiz	Impaired Financing Receivable With No Related Allowance Net Foregone Interest Income ImpairedFinancingReceivableWithNoRelatedAllowanceNetForegoneInterestIncome	545000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	2156000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2156000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1505000	usd
CY2021	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1506000	usd
CY2021	fbiz	Impaired Financing Receivable With Related Allowance Foregone Interest Income ImpairedFinancingReceivableWithRelatedAllowanceForegoneInterestIncome	113000	usd
CY2021	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	8000	usd
CY2021	fbiz	Impaired Financing Receivable With Related Allowance Net Foregone Interest Income ImpairedFinancingReceivableWithRelatedAllowanceNetForegoneInterestIncome	105000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	6575000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	6720000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1505000	usd
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	14260000	usd
CY2021	fbiz	Impaired Financing Receivable Foregone Interest Income ImpairedFinancingReceivableForegoneInterestIncome	1104000	usd
CY2021	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	454000	usd
CY2021	fbiz	Impaired Financing Receivable Net Foregone Interest Income ImpairedFinancingReceivableNetForegoneInterestIncome	650000	usd
CY2022Q2	fbiz	Loans And Leases Receivable Difference Between Recorded Investment And Unpaid Principal Balance LoansAndLeasesReceivableDifferenceBetweenRecordedInvestmentAndUnpaidPrincipalBalance	144000	usd
CY2021Q4	fbiz	Loans And Leases Receivable Difference Between Recorded Investment And Unpaid Principal Balance LoansAndLeasesReceivableDifferenceBetweenRecordedInvestmentAndUnpaidPrincipalBalance	145000	usd
CY2022Q2	fbiz	Financing Receivable Modifications Performing Troubled Debt Restructuring FinancingReceivableModificationsPerformingTroubledDebtRestructuring	188000	usd
CY2021Q4	fbiz	Financing Receivable Modifications Performing Troubled Debt Restructuring FinancingReceivableModificationsPerformingTroubledDebtRestructuring	217000	usd
CY2022Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	23669000	usd
CY2022Q2	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	85000	usd
CY2022Q2	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	4247000	usd
CY2022Q2	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	4162000	usd
CY2022Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-3727000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24104000	usd
CY2021Q1	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28982000	usd
CY2021Q2	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	2894000	usd
CY2021Q2	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	545000	usd
CY2021Q2	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	-2349000	usd
CY2021Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-958000	usd
CY2021Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	25675000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24336000	usd
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	107000	usd
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	4457000	usd
	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	4350000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-4582000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24104000	usd
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28521000	usd
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3038000	usd
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	3218000	usd
	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	180000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-3026000	usd
CY2021Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	25675000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	22850000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1254000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24104000	usd
CY2022Q2	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2285307000	usd
CY2022Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	5773000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2291080000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	22831000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1505000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24336000	usd
CY2021Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2234356000	usd
CY2021Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	6575000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2240931000	usd
	fbiz	Right Of Use Asset Obtained In Exchange For Operating Lease Liability New Operating Leases During The Year RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityNewOperatingLeasesDuringTheYear	1600000	usd
CY2022Q2	fbiz	Tenant Improvement Allowance Recognized As A Lease Incentive TenantImprovementAllowanceRecognizedAsALeaseIncentive	991000	usd
CY2022Q2	us-gaap	Operating Lease Expense OperatingLeaseExpense	382000	usd
CY2021Q2	us-gaap	Operating Lease Expense OperatingLeaseExpense	374000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	765000	usd
	us-gaap	Operating Lease Expense OperatingLeaseExpense	749000	usd
CY2022Q2	us-gaap	Short Term Lease Cost ShortTermLeaseCost	37000	usd
CY2021Q2	us-gaap	Short Term Lease Cost ShortTermLeaseCost	49000	usd
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	74000	usd
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	88000	usd
CY2022Q2	us-gaap	Variable Lease Cost VariableLeaseCost	140000	usd
CY2021Q2	us-gaap	Variable Lease Cost VariableLeaseCost	111000	usd
	us-gaap	Variable Lease Cost VariableLeaseCost	266000	usd
CY2022Q2	us-gaap	Sublease Income SubleaseIncome	45000	usd
CY2021Q2	us-gaap	Sublease Income SubleaseIncome	43000	usd
	us-gaap	Sublease Income SubleaseIncome	90000	usd
	us-gaap	Variable Lease Cost VariableLeaseCost	239000	usd
	us-gaap	Sublease Income SubleaseIncome	82000	usd
CY2022Q2	us-gaap	Lease Cost LeaseCost	514000	usd
CY2021Q2	us-gaap	Lease Cost LeaseCost	491000	usd
	us-gaap	Lease Cost LeaseCost	1015000	usd
	us-gaap	Lease Cost LeaseCost	994000	usd
CY2022Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y10M2D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y18D
CY2022Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0272
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0251
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	832000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1248000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1073000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	949000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	935000	usd
CY2022Q2	fbiz	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	3003000	usd
CY2022Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	8040000	usd
CY2022Q2	fbiz	Discountonoperatingleasecashflows Discountonoperatingleasecashflows	833000	usd
CY2022Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	7207000	usd
CY2022Q2	us-gaap	Interest Receivable InterestReceivable	6433000	usd
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	5497000	usd
CY2022Q2	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	7870000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	6175000	usd
CY2022Q2	fbiz	Investmentin Historic Development Entities InvestmentinHistoricDevelopmentEntities	2369000	usd
CY2021Q4	fbiz	Investmentin Historic Development Entities InvestmentinHistoricDevelopmentEntities	2299000	usd
CY2022Q2	fbiz	Investment In Low Income Housing Development Entities InvestmentInLowIncomeHousingDevelopmentEntities	8901000	usd
CY2021Q4	fbiz	Investment In Low Income Housing Development Entities InvestmentInLowIncomeHousingDevelopmentEntities	2964000	usd
CY2022Q2	fbiz	Investmentin Limited Partnerships InvestmentinLimitedPartnerships	11435000	usd
CY2021Q4	fbiz	Investmentin Limited Partnerships InvestmentinLimitedPartnerships	9874000	usd
CY2022Q2	fbiz	Investmentin Trust Ii InvestmentinTrustII	0	usd
CY2021Q4	fbiz	Investmentin Trust Ii InvestmentinTrustII	315000	usd
CY2022Q2	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	3760000	usd
CY2021Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	2689000	usd
CY2022Q2	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	8100000	usd
CY2021Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	9577000	usd
CY2021Q4	fbiz	Sole Ownership Of Common Securities Issued By Trust Ii SoleOwnershipOfCommonSecuritiesIssuedByTrustIi	315000	usd
CY2022Q2	us-gaap	Other Assets OtherAssets	48868000	usd
CY2021Q4	us-gaap	Other Assets OtherAssets	39390000	usd
CY2022Q1	fbiz	Gain Loss On Surrendering Of Trust Preferred Securities GainLossOnSurrenderingOfTrustPreferredSecurities	0	usd
CY2008Q3	fbiz	Trust Preferred Securities TrustPreferredSecurities	10000000	usd
CY2008Q3	fbiz	Fixed Interest Rate Trust Preferred Securities FixedInterestRateTrustPreferredSecurities	0.1050
CY2021Q4	fbiz	Investmentin Trust Ii InvestmentinTrustII	315000	usd
CY2022Q2	us-gaap	Deposits Deposits	1869331000	usd
	fbiz	Average Balance Deposits AverageBalanceDeposits	1930904000	usd
	fbiz	Deposits Weighted Average Interest Rate Duringthe Period DepositsWeightedAverageInterestRateDuringthePeriod	0.0019
CY2021Q4	us-gaap	Deposits Deposits	1957923000	usd
CY2021	fbiz	Average Balance Deposits AverageBalanceDeposits	1904133000	usd
CY2021	fbiz	Deposits Weighted Average Interest Rate Duringthe Period DepositsWeightedAverageInterestRateDuringthePeriod	0.0019
CY2022Q2	us-gaap	Time Deposit Maturities Remainder Of Fiscal Year TimeDepositMaturitiesRemainderOfFiscalYear	90092000	usd
CY2022Q2	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	16724000	usd
CY2022Q2	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	16541000	usd
CY2022Q2	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	402000	usd
CY2022Q2	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	490000	usd
CY2022Q2	fbiz	Time Deposit Maturities After Year Four TimeDepositMaturitiesAfterYearFour	2072000	usd
CY2022Q2	us-gaap	Time Deposits TimeDeposits	126321000	usd
CY2022Q2	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	596642000	usd
	fbiz	Borrowed Funds Average Balance BorrowedFundsAverageBalance	468110000	usd
	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0186
CY2021Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	413527000	usd
CY2021	fbiz	Borrowed Funds Average Balance BorrowedFundsAverageBalance	418783000	usd
CY2021	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0186
CY2022Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	338300000	usd
CY2022Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	42300000	usd
CY2022Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	35500000	usd
CY2022Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	48000000	usd
CY2022Q2	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	60000000	usd
CY2022Q2	fbiz	Long Term Debt Maturity After Year Four LongTermDebtMaturityAfterYearFour	72542000	usd
CY2022Q2	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	596642000	usd
CY2008Q3	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.1050
CY2022Q2	fbiz	Sole Ownership Of Common Securities Issued By Trust Ii SoleOwnershipOfCommonSecuritiesIssuedByTrustIi	315000	usd
CY2008Q3	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	10300000	usd
CY2022Q2	us-gaap	Debt Instrument Interest Rate Stated Percentage DebtInstrumentInterestRateStatedPercentage	0.1050
CY2021Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	239000	usd
CY2022Q2	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	725000	usd
	us-gaap	Line Of Credit Facility Commitment Fee Amount LineOfCreditFacilityCommitmentFeeAmount	6600	usd
	us-gaap	Line Of Credit Facility Commitment Fee Amount LineOfCreditFacilityCommitmentFeeAmount	6600	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	0	usd
CY2022Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	12500	shares
CY2022Q2	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	12500000	usd
	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.070
CY2022Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q2	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1000
	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	12000000	usd
	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.070
CY2022Q2	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	246000	usd
	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	246000	usd
CY2022Q2	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	1000
CY2022Q2	fbiz	Sba Loans Probabilityof Future Losses SBALoansProbabilityofFutureLosses	673000	usd
CY2022Q1	fbiz	Sba Recourse Reserve SBARecourseReserve	559000	usd
CY2021Q1	fbiz	Sba Recourse Reserve SBARecourseReserve	593000	usd
CY2021Q4	fbiz	Sba Recourse Reserve SBARecourseReserve	635000	usd
CY2020Q4	fbiz	Sba Recourse Reserve SBARecourseReserve	723000	usd
CY2022Q2	fbiz	Sba Recourse Provision Benefit SBARecourseProvisionBenefit	114000	usd
CY2021Q2	fbiz	Sba Recourse Provision Benefit SBARecourseProvisionBenefit	245000	usd
	fbiz	Sba Recourse Provision Benefit SBARecourseProvisionBenefit	38000	usd
	fbiz	Sba Recourse Provision Benefit SBARecourseProvisionBenefit	115000	usd
CY2022Q2	fbiz	Sba Loan Charge Offs Net SBALoanChargeOffsNet	0	usd
CY2021Q2	fbiz	Sba Loan Charge Offs Net SBALoanChargeOffsNet	-8000	usd
	fbiz	Sba Loan Charge Offs Net SBALoanChargeOffsNet	0	usd
	fbiz	Sba Loan Charge Offs Net SBALoanChargeOffsNet	-8000	usd
CY2022Q2	fbiz	Sba Recourse Reserve SBARecourseReserve	673000	usd
CY2021Q2	fbiz	Sba Recourse Reserve SBARecourseReserve	830000	usd
CY2022Q2	fbiz	Sba Recourse Reserve SBARecourseReserve	673000	usd
CY2021Q2	fbiz	Sba Recourse Reserve SBARecourseReserve	830000	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	0	usd
CY2022Q2	fbiz	Fair Value Liabilities Level2to Level1 Transfers Amount1 FairValueLiabilitiesLevel2toLevel1TransfersAmount1	0	usd
CY2022Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	0	usd
CY2022Q2	fbiz	Fair Value Assets Level1to Level2 Transfers Amount1 FairValueAssetsLevel1toLevel2TransfersAmount1	0	usd
CY2021	fbiz	Fair Value Liabilities Level1to Level2 Transfers Amount1 FairValueLiabilitiesLevel1toLevel2TransfersAmount1	0	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	0	usd
	fbiz	Fair Value Liabilities Level1to Level2 Transfers Amount1 FairValueLiabilitiesLevel1toLevel2TransfersAmount1	0	usd
	fbiz	Fair Value Assets Level2to Level1 Transfers Amount1 FairValueAssetsLevel2toLevel1TransfersAmount1	0	usd
CY2021	fbiz	Fair Value Liabilities Level2to Level1 Transfers Amount1 FairValueLiabilitiesLevel2toLevel1TransfersAmount1	0	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	usd
CY2021	fbiz	Fair Value Assets Level2to Level1 Transfers Amount1 FairValueAssetsLevel2toLevel1TransfersAmount1	0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	usd
CY2021	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	0	usd
	fbiz	Fair Value Liabilities Level2to Level1 Transfers Amount1 FairValueLiabilitiesLevel2toLevel1TransfersAmount1	0	usd
CY2022Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	0	usd
CY2022Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	0	usd
CY2022Q2	fbiz	Fair Value Liabilities Level1to Level2 Transfers Amount1 FairValueLiabilitiesLevel1toLevel2TransfersAmount1	0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	0	usd
CY2022Q2	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	0	usd
	fbiz	Fair Value Assets Level1to Level2 Transfers Amount1 FairValueAssetsLevel1toLevel2TransfersAmount1	0	usd
CY2022Q2	fbiz	Fair Value Assets Level2to Level1 Transfers Amount1 FairValueAssetsLevel2toLevel1TransfersAmount1	0	usd
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	0	usd
CY2021	fbiz	Fair Value Assets Level1to Level2 Transfers Amount1 FairValueAssetsLevel1toLevel2TransfersAmount1	0	usd
CY2022Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	95484000	usd
CY2022Q2	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	95484000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	208643000	usd
CY2022Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	208643000	usd
CY2022Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	13968000	usd
CY2022Q2	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	13849000	usd
CY2022Q2	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	2256000	usd
CY2022Q2	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	2437000	usd
CY2022Q2	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2265996000	usd
CY2022Q2	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	2258728000	usd
CY2022Q2	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	22959000	usd
CY2022Q2	us-gaap	Interest Receivable InterestReceivable	6433000	usd
CY2022Q2	fbiz	Accrued Interest Receivable Fair Value Disclosure AccruedInterestReceivableFairValueDisclosure	6433000	usd
CY2022Q2	us-gaap	Deposits Deposits	1869331000	usd
CY2022Q2	us-gaap	Deposits Fair Value Disclosure DepositsFairValueDisclosure	1869191000	usd
CY2022Q2	fbiz	Federal Home Loan Bank And Other Borrowings FederalHomeLoanBankAndOtherBorrowings	596642000	usd
CY2022Q2	fbiz	Federal Home Loan Bank And Other Borrowings Fair Value Disclosure FederalHomeLoanBankAndOtherBorrowingsFairValueDisclosure	587308000	usd
CY2022Q2	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1708000	usd
CY2022Q2	us-gaap	Accrued Liabilities Fair Value Disclosure AccruedLiabilitiesFairValueDisclosure	1708000	usd
CY2022Q2	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	116000	usd
CY2022Q2	fbiz	Standby Letters Of Credit Fair Value Disclosure StandbyLettersOfCreditFairValueDisclosure	116000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	57110000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	57110000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	205702000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	205702000	usd
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	19746000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	20276000	usd
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	3570000	usd
CY2021Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	3927000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2215072000	usd
CY2021Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	2241093000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	13336000	usd
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	5497000	usd
CY2021Q4	fbiz	Accrued Interest Receivable Fair Value Disclosure AccruedInterestReceivableFairValueDisclosure	5497000	usd
CY2021Q4	us-gaap	Deposits Deposits	1957923000	usd
CY2021Q4	us-gaap	Deposits Fair Value Disclosure DepositsFairValueDisclosure	1968195000	usd
CY2021Q4	fbiz	Federal Home Loan Bank And Other Borrowings FederalHomeLoanBankAndOtherBorrowings	403451000	usd
CY2021Q4	fbiz	Federal Home Loan Bank And Other Borrowings Fair Value Disclosure FederalHomeLoanBankAndOtherBorrowingsFairValueDisclosure	409894000	usd
CY2021Q4	us-gaap	Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust	10076000	usd
CY2021Q4	us-gaap	Fair Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	8844000	usd
CY2021Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1008000	usd
CY2021Q4	us-gaap	Accrued Liabilities Fair Value Disclosure AccruedLiabilitiesFairValueDisclosure	1008000	usd
CY2021Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	203000	usd
CY2021Q4	fbiz	Standby Letters Of Credit Fair Value Disclosure StandbyLettersOfCreditFairValueDisclosure	203000	usd
CY2022Q2	fbiz	Accumulated Derivative Credit Valuation Adjustment AccumulatedDerivativeCreditValuationAdjustment	191000	usd
CY2021Q4	fbiz	Accumulated Derivative Credit Valuation Adjustment AccumulatedDerivativeCreditValuationAdjustment	191000	usd
	us-gaap	Description Of Material Affects Of Noncompliance DescriptionOfMaterialAffectsOfNoncompliance	Failure to meet minimum capital requirements can result in certain mandatory, and possibly additional discretionary actions on the part of regulators, that if undertaken, could have a direct material effect on the Bank’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory practices.
CY2022Q2	us-gaap	Capital Capital	309573000	usd
CY2022Q2	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1156
CY2022Q2	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	214312000	usd
CY2022Q2	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2022Q2	fbiz	Capital Requiredfor Capital Adequacy Plus Capital Conservation Buffer CapitalRequiredforCapitalAdequacyPlusCapitalConservationBuffer	281285000	usd
CY2022Q2	fbiz	Capital Requiredfor Capital Adequacy Plus Conservation Bufferto Risk Weighted Assets CapitalRequiredforCapitalAdequacyPlusConservationBuffertoRiskWeightedAssets	0.1050
CY2022Q2	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	250331000	usd
CY2022Q2	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.0934
CY2022Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	160734000	usd
CY2022Q2	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2022Q2	fbiz	Tier One Risk Based Capital Requiredfor Capital Adequacy Plus Capital Conservation Buffer TierOneRiskBasedCapitalRequiredforCapitalAdequacyPlusCapitalConservationBuffer	227707000	usd
CY2022Q2	fbiz	Tier One Risk Based Capital Requiredfor Capital Adequacy Plus Conservation Bufferto Risk Weighted Assets TierOneRiskBasedCapitalRequiredforCapitalAdequacyPlusConservationBuffertoRiskWeightedAssets	0.0850
CY2022Q2	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	238339000	usd
CY2022Q2	fbiz	Common Equity Tier One Capitalto Risk Weighted Assets CommonEquityTierOneCapitaltoRiskWeightedAssets	0.0890
CY2022Q2	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	120551000	usd
CY2022Q2	fbiz	Common Equity Tier One Capital Requiredfor Capital Adequacyto Risk Weighted Assets CommonEquityTierOneCapitalRequiredforCapitalAdequacytoRiskWeightedAssets	0.0450
CY2022Q2	fbiz	Common Equity Tier One Capital Requiredfor Capital Adequacy Plus Capital Conservation Buffer CommonEquityTierOneCapitalRequiredforCapitalAdequacyPlusCapitalConservationBuffer	187523000	usd
CY2022Q2	fbiz	Common Equity Tier One Capital Requiredfor Capital Adequacy Plus Conservation Bufferto Risk Weighted Assets CommonEquityTierOneCapitalRequiredforCapitalAdequacyPlusConservationBuffertoRiskWeightedAssets	0.0700
CY2022Q2	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	250331000	usd
CY2022Q2	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0919
CY2022Q2	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	108923000	usd
CY2022Q2	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2022Q2	fbiz	Tier One Leverage Capital Requiredfor Capital Adequacy Plus Capital Conservation Buffer TierOneLeverageCapitalRequiredforCapitalAdequacyPlusCapitalConservationBuffer	108923000	usd
CY2022Q2	fbiz	Tier One Leverage Capital Requiredfor Capital Adequacy Plus Conservation Bufferto Risk Weighted Assets TierOneLeverageCapitalRequiredforCapitalAdequacyPlusConservationBuffertoRiskWeightedAssets	0.0400
CY2021Q4	us-gaap	Capital Capital	281745000	usd
CY2021Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1082
CY2021Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	208337000	usd
CY2021Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2021Q4	fbiz	Capital Requiredfor Capital Adequacy Plus Capital Conservation Buffer CapitalRequiredforCapitalAdequacyPlusCapitalConservationBuffer	273443000	usd
CY2021Q4	fbiz	Capital Requiredfor Capital Adequacy Plus Conservation Bufferto Risk Weighted Assets CapitalRequiredforCapitalAdequacyPlusConservationBuffertoRiskWeightedAssets	0.1050
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	232795000	usd
CY2021Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.0894
CY2021Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	156253000	usd
CY2021Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2021Q4	fbiz	Tier One Risk Based Capital Requiredfor Capital Adequacy Plus Capital Conservation Buffer TierOneRiskBasedCapitalRequiredforCapitalAdequacyPlusCapitalConservationBuffer	221358000	usd
CY2021Q4	fbiz	Tier One Risk Based Capital Requiredfor Capital Adequacy Plus Conservation Bufferto Risk Weighted Assets TierOneRiskBasedCapitalRequiredforCapitalAdequacyPlusConservationBuffertoRiskWeightedAssets	0.0850
CY2021Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	222719000	usd
CY2021Q4	fbiz	Common Equity Tier One Capitalto Risk Weighted Assets CommonEquityTierOneCapitaltoRiskWeightedAssets	0.0855
CY2021Q4	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	117190000	usd
CY2021Q4	fbiz	Common Equity Tier One Capital Requiredfor Capital Adequacyto Risk Weighted Assets CommonEquityTierOneCapitalRequiredforCapitalAdequacytoRiskWeightedAssets	0.0450
CY2021Q4	fbiz	Common Equity Tier One Capital Requiredfor Capital Adequacy Plus Capital Conservation Buffer CommonEquityTierOneCapitalRequiredforCapitalAdequacyPlusCapitalConservationBuffer	182295000	usd
CY2021Q4	fbiz	Common Equity Tier One Capital Requiredfor Capital Adequacy Plus Conservation Bufferto Risk Weighted Assets CommonEquityTierOneCapitalRequiredforCapitalAdequacyPlusConservationBuffertoRiskWeightedAssets	0.0700
CY2021Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	232795000	usd
CY2021Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.0894
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	104145000	usd
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2021Q4	fbiz	Tier One Leverage Capital Requiredfor Capital Adequacy Plus Capital Conservation Buffer TierOneLeverageCapitalRequiredforCapitalAdequacyPlusCapitalConservationBuffer	104145000	usd
CY2021Q4	fbiz	Tier One Leverage Capital Requiredfor Capital Adequacy Plus Conservation Bufferto Risk Weighted Assets TierOneLeverageCapitalRequiredforCapitalAdequacyPlusConservationBuffertoRiskWeightedAssets	0.0400

Files In Submission

Name	View Source	Status
R43.htm	Edgar Link	pending
0001521951-22-000051-index-headers.html	Edgar Link	pending
0001521951-22-000051-index.html	Edgar Link	pending
0001521951-22-000051.txt	Edgar Link	pending
0001521951-22-000051-xbrl.zip	Edgar Link	pending
fbiz-20220630.htm	Edgar Link	pending
fbiz-20220630.xsd	Edgar Link	pending
fbiz-20220630_cal.xml	Edgar Link	unprocessable
fbiz-20220630_def.xml	Edgar Link	unprocessable
fbiz-20220630_htm.xml	Edgar Link	completed
fbiz-20220630_lab.xml	Edgar Link	unprocessable
fbiz-20220630_pre.xml	Edgar Link	unprocessable
fbiz20220630exhibit311.htm	Edgar Link	pending
fbiz20220630exhibit312.htm	Edgar Link	pending
fbiz20220630exhibit32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R9999.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$FBIZ
FIRST BUSINESS FINANCIAL SERVICES, INC. Stock $fbiz

2022 Q3 Form 10-Q Financial Statement

#000152195122000051 Filed on July 29, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FBIZ FIRST BUSINESS FINANCIAL SERVICES, INC. Stock $fbiz

2022 Q3 Form 10-Q Financial Statement

#000152195122000051 Filed on July 29, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FBIZ
FIRST BUSINESS FINANCIAL SERVICES, INC. Stock $fbiz