XML 70 R60.htm IDEA: XBRL DOCUMENT v3.10.0.1

FHLB Advances, Other Borrowings and Junior Subordinated Notes Payable (Composition of Borrowed Funds) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 375,442,000		$ 217,917,000
Borrowed funds, average balance	$ 305,114,000	$ 140,083,000
Borrowed funds, interest rate during period	2.63%	3.14%
Long-term borrowings
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 210,942,000		180,907,000
Short-term borrowings
Composition of Borrowed Funds [Line Items]
Borrowed funds	164,500,000		37,010,000
Federal funds purchased
Composition of Borrowed Funds [Line Items]
Borrowed funds	0		0
Borrowed funds, average balance	$ 240,000	$ 66,000
Borrowed funds, interest rate during period	2.41%	1.22%
FHLB advances
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 341,000,000		183,500,000
Borrowed funds, average balance	$ 270,445,000	$ 105,276,000
Borrowed funds, interest rate during period	1.95%	1.40%
Line of credit
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 0		10,000
Borrowed funds, average balance	$ 7,000	$ 328,000
Borrowed funds, interest rate during period	4.43%	3.64%
Other borrowings
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 675,000		675,000
Borrowed funds, average balance	$ 675,000	$ 1,241,000
Borrowed funds, interest rate during period	8.09%	14.50%
Subordinated notes payable
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 23,741,000		23,713,000
Borrowed funds, average balance	$ 23,725,000	$ 23,161,000
Borrowed funds, interest rate during period	6.66%	6.93%
Junior subordinated notes
Composition of Borrowed Funds [Line Items]
Borrowed funds	$ 10,026,000		$ 10,019,000
Borrowed funds, average balance	$ 10,022,000	$ 10,011,000
Borrowed funds, interest rate during period	11.01%	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://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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: