XML 79 R67.htm IDEA: XBRL DOCUMENT v3.22.2.2

Deposits (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Deposits
Deposits		$ 2,087,545	$ 1,957,923
Average balance, deposits	$ 1,904,133	$ 1,943,303
Deposits, weighted average interest rate during the period	0.19%	0.34%
Non-interest-bearing transaction accounts
Deposits
Deposits		$ 564,141	589,559
Average balance, deposits	$ 536,981	$ 568,131
Deposits, weighted average interest rate during the period	0.00%	0.00%
Interest-bearing transaction accounts
Deposits
Deposits		$ 461,883	530,225
Average balance, deposits	$ 506,693	$ 507,402
Deposits, weighted average interest rate during the period	0.19%	0.42%
Money market accounts
Deposits
Deposits		$ 742,545	754,410
Average balance, deposits	$ 693,608	$ 765,839
Deposits, weighted average interest rate during the period	0.17%	0.43%
Certificates of deposit
Deposits
Deposits		$ 160,655	54,091
Average balance, deposits	$ 47,020	$ 80,093
Deposits, weighted average interest rate during the period	0.84%	0.85%
Wholesale deposits
Deposits
Deposits		$ 158,321	$ 29,638
Average balance, deposits	$ 119,831	$ 21,838
Deposits, weighted average interest rate during the period	0.82%	2.66%

X

- Definition

Average Balance, Deposits

+ References

No definition available.

+ Details

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

X

- Definition

[Line Items] for Deposit [Table]

+ References

No definition available.

+ Details

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

X

- Definition

Deposits, Weighted Average Interest Rate During the Period

+ References

No definition available.

+ Details

Name:	fbiz_DepositsWeightedAverageInterestRateDuringthePeriod
Namespace Prefix:	fbiz_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

+ 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 210.9-03.12)
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

+ Details

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

X

- Details

Name:	fbiz_DepositTypeAxis=fbiz_NoninterestbearingTransactionAccountsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	fbiz_DepositTypeAxis=fbiz_InterestbearingTransactionAccountsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	fbiz_DepositTypeAxis=fbiz_MoneyMarketAccountsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	fbiz_DepositTypeAxis=fbiz_NonbrokeredCertificatesofDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	fbiz_DepositTypeAxis=fbiz_BrokeredCertificatesofDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: