XML 76 R66.htm IDEA: XBRL DOCUMENT v3.7.0.1

Commitments and Contingencies Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
SBA Loans, Probability of Future Losses	$ 1,700,000
SBA Recourse Provision	$ 6,000	$ 0	$ 2,068,000

X

- Definition

SBA Loans, Probability of Future Losses

+ References

No definition available.

+ Details

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

X

- Definition

SBA Recourse Provision

+ References

No definition available.

+ Details

Name:	fbiz_SBARecourseProvision
Namespace Prefix:	fbiz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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