XML 90 R76.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Allowance for Loan and Lease Losses by Methodology) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | $ 25,286 | $ 22,580 |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 5,989 | 1,650 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 31,275 | 24,230 | $ 24,336 | $ 28,521
Financing Receivable, Collectively Evaluated for Impairment | 2,829,421 | 2,439,400 |  |
Financing Receivable, Individually Evaluated for Impairment | 20,597 | 3,815 |  |
Loans and Leases Receivable, Gross | 2,850,018 | 2,443,215 |  |
Commercial real estate — owner occupied |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 1,525 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 1,525 |  |  |
Financing Receivable, Collectively Evaluated for Impairment | 256,479 |  |  |
Financing Receivable, Individually Evaluated for Impairment | 0 |  |  |
Loans and Leases Receivable, Gross | 256,479 |  |  |
Commercial real estate — non-owner occupied |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 5,596 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 5,596 |  |  |
Financing Receivable, Collectively Evaluated for Impairment | 773,494 |  |  |
Financing Receivable, Individually Evaluated for Impairment | 0 |  |  |
Loans and Leases Receivable, Gross | 773,494 |  |  |
Construction |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 1,244 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 1,244 |  |  |
Financing Receivable, Collectively Evaluated for Impairment | 193,080 |  |  |
Financing Receivable, Individually Evaluated for Impairment | 0 |  |  |
Loans and Leases Receivable, Gross | 193,080 |  |  |
Multi-family |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 3,562 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 3,562 |  |  |
Financing Receivable, Collectively Evaluated for Impairment | 450,529 |  |  |
Financing Receivable, Individually Evaluated for Impairment | 0 |  |  |
Loans and Leases Receivable, Gross | 450,529 |  |  |
1-4 family |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 221 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 22 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 243 |  |  |
Financing Receivable, Collectively Evaluated for Impairment | 26,267 |  |  |
Financing Receivable, Individually Evaluated for Impairment | 22 |  |  |
Loans and Leases Receivable, Gross | 26,289 |  |  |
Total commercial real estate |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment |  | 12,560 |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment |  | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 12,560 | 15,110 | 17,157
Financing Receivable, Collectively Evaluated for Impairment |  | 1,541,920 |  |
Financing Receivable, Individually Evaluated for Impairment |  | 30 |  |
Loans and Leases Receivable, Gross |  | 1,541,950 |  |
Commercial and industrial |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 12,743 | 9,478 |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 5,967 | 1,650 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 18,710 | 11,128 | 8,413 | 10,593
Financing Receivable, Collectively Evaluated for Impairment | 1,085,260 | 849,542 |  |
Financing Receivable, Individually Evaluated for Impairment | 20,575 | 3,785 |  |
Loans and Leases Receivable, Gross | 1,105,835 | 853,327 |  |
Consumer and other |  |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 395 | 542 |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0 |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 395 | 542 | $ 813 | $ 771
Financing Receivable, Collectively Evaluated for Impairment | 44,312 | 47,938 |  |
Financing Receivable, Individually Evaluated for Impairment | 0 | 0 |  |
Loans and Leases Receivable, Gross | $ 44,312 | $ 47,938 |  |

X
- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (g) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (g) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph c -Publisher SEC + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L(5)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C + Details
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11C -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L(5)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-2 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_CommercialRealEstateLoansReceivableOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_CommercialRealEstateLoansReceivableNonOwnerOccupiedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_CommercialRealEstateLoansReceivableConstructionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_CommercialRealEstateLoansReceivableMultiFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_CommercialRealEstateLoansReceivable14FamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_CommercialandIndustrialLoansandLeasesReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fbiz_ConsumerAndOtherLoansReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |