XML 61 R47.htm IDEA: XBRL DOCUMENT
v3.20.4

Commitments and Contingencies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Lending Related And Other Commitments | Financial instruments whose contract amounts represent potential credit risk were as follows:
|  | At December 31,
|  | 2020 |  | 2019
|  | (In Thousands)
Commitments to extend credit, primarily commercial loans |  | $ | 654,093 |  |  | $ | 555,374 |
Standby letters of credit |  | 8,086 |  |  | 8,918 |
Summary of SBA Recourse Reserve Activity | The summary of the activity in the SBA recourse reserve is as follows:
|  | As of and For the Year Ended December 31,
|  | 2020 |  | 2019
|  | (In Thousands)
Balance at the beginning of the period |  | $ | 1,345 |  |  | $ | 2,956 |
SBA recourse (benefit) provision |  | (278) |  |  | 188 |
Charge-offs, net |  | (344) |  |  | (1,799) |
Balance at the end of the period |  | $ | 723 |  |  | $ | 1,345 |

X
- Definition Summary of SBA Recourse Reserve [Table Text Block] + References No definition available. + Details
Name: | fbiz_SummaryofSBARecourseReserveTableTextBlock
Namespace Prefix: | fbiz_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
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

X
- Definition Tabular disclosure of information about obligations resulting from other commitments. + References No definition available. + Details
Name: | us-gaap_OtherCommitmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration