XML 131 R116.htm IDEA: XBRL DOCUMENT v3.3.1.900

Commitments and Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Commitments to extend credit, primarily commercial loans
Lending Related Commitments by Type [Line Items]
Lending related commitments	$ 512,627	$ 406,183
Standby letters of credit
Lending Related Commitments by Type [Line Items]
Lending related commitments	$ 18,622	$ 17,555

X

- Definition

Lending related commitments.

+ References

No definition available.

+ Details

Name:	fbiz_LendingRelatedCommitments
Namespace Prefix:	fbiz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

[Line Items] for Lending Related Commitments by Type [Table]

+ References

No definition available.

+ Details

Name:	fbiz_LendingRelatedCommitmentsByTypeLineItems
Namespace Prefix:	fbiz_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	fbiz_LendingRelatedCommitmentsByTypeAxis=us-gaap_CommitmentsToExtendCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	fbiz_LendingRelatedCommitmentsByTypeAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: