XML 89 R75.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) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2023 | Dec. 31, 2020
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Including | $ 32,997 | $ 24,230 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 31,275 | 24,230 | $ 24,336 |  | $ 28,521
Financing Receivable, Allowance for Credit Loss, Writeoff | (1,781) | (979) | (3,508) |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 548 | 4,741 | 5,126 |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | (1,233) | 3,762 | 1,618 |  |
Financing Receivable, Credit Loss, Expense (Reversal) | 8,182 | (3,868) | (5,803) |  |
Allowance for loan and lease losses - begin | 24,230 |  |  |  |
Allowance for loan and lease losses - end | 31,275 | 24,230 |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 1,722 |  |  |  |
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 1,818 |  |  | $ 484 |
Off-Balance-Sheet, Credit Loss, Liability |  |  |  | $ 1,300 |
Commercial real estate — owner occupied |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Including | 1,540 | 1,766 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 1,525 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 9 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | 9 |  |  |  |
Financing Receivable, Credit Loss, Expense (Reversal) | (31) |  |  |  |
Allowance for loan and lease losses - end | 1,525 |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 15 |  |  |  |
Commercial real estate — owner occupied | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | (204) |  |  |  |
Commercial real estate — non-owner occupied |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Including | 5,636 | 5,108 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 5,596 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 1 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | 1 |  |  |  |
Financing Receivable, Credit Loss, Expense (Reversal) | 769 |  |  |  |
Allowance for loan and lease losses - end | 5,596 |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 40 |  |  |  |
Commercial real estate — non-owner occupied | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | (242) |  |  |  |
Construction |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Including | 2,125 | 1,646 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 1,244 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 0 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | 0 |  |  |  |
Financing Receivable, Credit Loss, Expense (Reversal) | (317) |  |  |  |
Allowance for loan and lease losses - end | 1,244 |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 881 |  |  |  |
Construction | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 796 |  |  |  |
Multi-family |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Including | 3,571 | 2,634 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 3,562 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 0 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | 0 |  |  |  |
Financing Receivable, Credit Loss, Expense (Reversal) | 1,323 |  |  |  |
Allowance for loan and lease losses - end | 3,562 |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 9 |  |  |  |
Multi-family | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | (386) |  |  |  |
1-4 family |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Including | 266 | 207 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 243 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 40 |  |  |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | 40 |  |  |  |
Financing Receivable, Credit Loss, Expense (Reversal) | 64 |  |  |  |
Allowance for loan and lease losses - end | 243 |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 23 |  |  |  |
1-4 family | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | (45) |  |  |  |
Total commercial real estate |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest |  | 12,560 | 15,110 |  | 17,157
Financing Receivable, Allowance for Credit Loss, Writeoff |  | 0 | (256) |  |
Financing Receivable, Allowance for Credit Loss, Recovery |  | 4,262 | 3,935 |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery |  | 4,262 | 3,679 |  |
Financing Receivable, Credit Loss, Expense (Reversal) |  | (6,812) | (5,726) |  |
Commercial and industrial |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Including | 19,408 | 12,403 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 18,710 | 11,128 | 8,413 |  | 10,593
Financing Receivable, Allowance for Credit Loss, Writeoff | (1,781) | (958) | (3,227) |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 478 | 437 | 1,168 |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | (1,303) | (521) | (2,059) |  |
Financing Receivable, Credit Loss, Expense (Reversal) | 6,435 | 3,236 | (121) |  |
Allowance for loan and lease losses - end | 18,710 |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 698 |  |  |  |
Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 1,873 |  |  |  |
Consumer and other |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Including | 451 | 466 |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 395 | 542 | 813 |  | $ 771
Financing Receivable, Allowance for Credit Loss, Writeoff | 0 | (21) | (25) |  |
Financing Receivable, Allowance for Credit Loss, Recovery | 20 | 42 | 23 |  |
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery | 20 | 21 | (2) |  |
Financing Receivable, Credit Loss, Expense (Reversal) | (61) | $ (292) | $ 44 |  |
Allowance for loan and lease losses - end | 395 |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 56 |  |  |  |
Consumer and other | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |
Allowance for credit losses: |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 26 |  |  |  |

X
- Definition Financing Receivable, Allowance for Credit Loss, Including unfunded credit commitment reserves + References No definition available. + Details
Name: | fbiz_FinancingReceivableAllowanceForCreditLossIncluding
Namespace Prefix: | fbiz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss. + 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/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (4) -Publisher SEC + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(4) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(3) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481696/310-30-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 3: 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 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482454/460-10-45-1 + Details
Name: | us-gaap_OffBalanceSheetCreditLossLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
Name: | us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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: |