XML 83 R70.htm IDEA: XBRL DOCUMENT v3.8.0.1

Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Troubled Debt Restructurings by Modification Type) (Details) $ in Thousands	Dec. 31, 2017 USD ($) securities loans	Dec. 31, 2016 USD ($) securities loans
Troubled debt restructurings:
Number of Loans | loans	27	30
Recorded Investment	$ 9,147	$ 13,560
Commercial and industrial
Troubled debt restructurings:
Number of Loans | loans	10	10
Recorded Investment	$ 4,951	$ 7,058
Extension of term | Commercial real estate:
Troubled debt restructurings:
Number of Loans | loans	0	1
Recorded Investment	$ 0	$ 8
Extension of term | Consumer and other:
Troubled debt restructurings:
Number of Loans | loans	1	1
Recorded Investment	$ 328	$ 378
Interest rate concession | Commercial real estate:
Troubled debt restructurings:
Number of Loans | securities	12	1
Recorded Investment	$ 3,793	$ 52
Combination of extension of term and interest rate conession | Commercial real estate:
Troubled debt restructurings:
Number of Loans | loans	1	16
Recorded Investment	$ 54	$ 6,056
Combination of extension of term and interest rate conession | Commercial and industrial
Troubled debt restructurings:
Number of Loans | loans	10	10
Recorded Investment	$ 4,951	$ 7,058
Combination of extension of term and interest rate conession | Consumer and other:
Troubled debt restructurings:
Number of Loans | loans	3	1
Recorded Investment	$ 21	$ 8

X

- Definition

Financing Receivable, Modifications, Number of Contracts3

+ References

No definition available.

+ Details

Name:	fbiz_FinancingReceivableModificationsNumberofContracts3
Namespace Prefix:	fbiz_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Financing Receivable, Modifications, Post-Modification Recorded Investment3

+ References

No definition available.

+ Details

Name:	fbiz_FinancingReceivableModificationsPostModificationRecordedInvestment3
Namespace Prefix:	fbiz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_CommercialAndIndustrialLoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=fbiz_TroubledDebtRestructuringExtensionOfTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_TotalConsumerAndOtherLoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=fbiz_TroubledDebtRestructuringInterestRateConcessionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=fbiz_TroubledDebtRestructuringCombinationOfExtensionOfTermAndInterestRateConcessionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: