XML 63 R57.htm IDEA: XBRL DOCUMENT v3.25.3

Loans, Lease Receivables, and Allowance for Credit Losses - Schedule of Non-Accrual Loans and Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	$ 8,331	$ 13,125
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	15,182	15,242
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	$ 0	$ 0
Total non-accrual loans and leases to gross loans and leases	0.70%	0.91%
Allowance for credit losses to gross loans and leases	1.15%	1.20%
Allowance for credit losses to non-accrual loans and leases	163.24%	131.38%
Commercial Real Estate
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	$ 0	$ 0
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	0	591
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	0	0
Commercial Real Estate | Owner Occupied
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	0	0
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	0	591
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	0	0
Commercial Real Estate | Non-owner Occupied
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	0	0
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	0	0
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	0	0
Commercial Real Estate | Construction
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	0	0
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	0	0
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	0	0
Commercial Real Estate | Multi-family
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	0	0
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	0	0
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	0	0
Commercial Real Estate | 1-4 Family
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	0	0
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	0	0
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	0	0
Commercial and Industrial
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	8,331	13,125
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	15,182	14,651
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	0	0
Consumer and Other
Financing Receivable, Impaired
Non-accrual loans and leases, Non-accrual With No Allowance for Credit Loss	0	0
Non-accrual loans and leases, Non-accrual With Allowance for Credit Loss	0	0
Non-accrual loans and leases, Loans Past Due Over 89 Days Still Accruing	$ 0	$ 0

X

- Definition

Ratio of allowance for loan and lease losses to gross loans and leases.

+ References

No definition available.

+ Details

Name:	fbiz_RatioOfAllowanceForLoanAndLeaseLossesToGrossLoansAndLeases
Namespace Prefix:	fbiz_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Ratio of Allowance for Loan and Leases Losses to Non-accrual Loans and Leases

+ References

No definition available.

+ Details

Name:	fbiz_RatioOfAllowanceForLoanAndLeasesLossesToNonAccrualLoansAndLeases
Namespace Prefix:	fbiz_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableImpairedLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Reflects the percentage derived from dividing impaired loans on which interest has ceased to be accrued by total loans.

+ References

No definition available.

+ Details

Name:	us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_OwnerOccupiedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_NonOwnerOccupiedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_MultiFamilyLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_OneToFourFamilyLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=fbiz_CommercialandIndustrialLoansandLeasesReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=fbiz_ConsumerAndOtherLoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: