XML 46 R59.htm IDEA: XBRL DOCUMENT
v2.4.0.8

FHLB Advances, Other Borrowings and Junior Subordinated Notes Payable (Composition of Borrowed Funds) (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | $ 18,251 | $ 22,251
Borrowed funds, weighted average balance | 25,110 | 28,982
Borrowed funds, interest rate during period | 6.86% | 6.78%
Long-term borrowings |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 18,241 | 22,241
Short-term borrowings |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 10 | 10
Federal funds purchased |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 0 | 0
Borrowed funds, weighted average balance | 224 | 260
Borrowed funds, interest rate during period | 0.81% | 0.74%
FHLB advances |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 0 | 0
Borrowed funds, weighted average balance | 6,282 | 6,471
Borrowed funds, interest rate during period | 0.16% | 0.19%
Line of credit |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 10 | 10
Borrowed funds, weighted average balance | 10 | 10
Borrowed funds, interest rate during period | 3.27% | 3.41%
Subordinated notes payable |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 7,926 | 11,926
Borrowed funds, weighted average balance | 8,279 | 11,926
Borrowed funds, interest rate during period | 7.19% | 6.92%
Junior subordinated notes |  |
Composition of Borrowed Funds [Line Items] |  |
Borrowed funds | 10,315 | 10,315
Borrowed funds, weighted average balance | $ 10,315 | $ 10,315
Borrowed funds, interest rate during period | 10.68% | 10.78%

X
- Definition Borrowed Funds, Weighted Average Balance + References No definition available. + Details
Name: | fbiz_BorrowedFundsWeightedAverageBalance
Namespace Prefix: | fbiz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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, collateralized financings, and capital lease obligations. + References No definition available. + Details
Name: | us-gaap_BorrowedFunds
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=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: 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