XML 71 R61.htm IDEA: XBRL DOCUMENT v3.10.0.1

FHLB Advances, Other Borrowings and Junior Subordinated Notes Payable (Composition of Borrowed Funds) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 291,459	$ 217,917
Borrowed funds, average balance	$ 312,460	$ 140,083
Borrowed funds, interest rate during period	2.67%	3.14%
Long-term borrowings
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 185,959	$ 180,907
Short-term borrowings
Composition of Borrowed Funds [Line Items]
Borrowed funds	105,500	37,010
Federal funds purchased
Composition of Borrowed Funds [Line Items]
Borrowed funds	0	0
Borrowed funds, average balance	$ 159	$ 66
Borrowed funds, interest rate during period	2.43%	1.22%
FHLB advances
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 257,000	$ 183,500
Borrowed funds, average balance	$ 277,866	$ 105,276
Borrowed funds, interest rate during period	2.01%	1.40%
Line of credit
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 0	$ 10
Borrowed funds, average balance	$ 5	$ 328
Borrowed funds, interest rate during period	4.46%	3.64%
Other borrowings
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 675	$ 675
Borrowed funds, average balance	$ 675	$ 1,241
Borrowed funds, interest rate during period	8.12%	14.50%
Subordinated notes payable
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 23,755	$ 23,713
Borrowed funds, average balance	$ 23,732	$ 23,161
Borrowed funds, interest rate during period	6.65%	6.93%
Junior subordinated notes
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 10,029	$ 10,019
Borrowed funds, average balance	$ 10,023	$ 10,011
Borrowed funds, interest rate during period	11.07%	11.11%

X

- Definition

Borrowed Funds, Average Balance

+ References

No definition available.

+ Details

Name:	fbiz_BorrowedFundsAverageBalance
Namespace Prefix:	fbiz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

[Line Items] for Composition of Borrowed Funds [Table]

+ References

No definition available.

+ Details

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

X

- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13,16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LongTermDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_ShortTermDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_FederalFundsPurchasedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fbiz_FHLBadvancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=fbiz_OtherBorrowingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_JuniorSubordinatedDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: