XML 54 R44.htm IDEA: XBRL DOCUMENT
v3.20.2

Significant Events CARES Act (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2020 USD ($)
Significant Events [Abstract] |  |
SBA Paycheck Protection Program Loans Outstanding, Gross Amount | $ 332,300 | $ 332,300
SBA Paycheck Protection Program, Loan & Leases Receiveable, Deferred Income | 6,900 | 6,900
SBA Paycheck Protection Program Interest Income, Loans | $ 1,100 | $ 2,000

X
- Definition SBA Paycheck Protection Program Interest Income, Loans + References No definition available. + Details
Name: | fbiz_SBAPaycheckProtectionProgramInterestIncomeLoans
Namespace Prefix: | fbiz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition SBA Paycheck Protection Program, Loan & Leases Receiveable, Deferred Income + References No definition available. + Details
Name: | fbiz_SBAPaycheckProtectionProgramLoanLeasesReceiveableDeferredIncome
Namespace Prefix: | fbiz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition SBA Paycheck Protection Program Loans Outstanding, Gross Amount + References No definition available. + Details
Name: | fbiz_SBAPaycheckProtectionProgramLoansOutstandingGrossAmount
Namespace Prefix: | fbiz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Significant Events [Abstract] + References No definition available. + Details
Name: | fbiz_SignificantEventsAbstract
Namespace Prefix: | fbiz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration