XML 95 R77.htm IDEA: XBRL DOCUMENT v3.21.2

Fair Value Disclosures (Measured on a Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swaps - liabilities, carrying amount	$ 31,890	$ 54,927
Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swaps - liabilities, carrying amount	31,890	54,927
Fair value on a recurring basis | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swaps - liabilities, carrying amount	31,890	54,927
Fair value on a recurring basis | Interest rate swaps | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swaps - liabilities, carrying amount	0	0
Fair value on a recurring basis | Interest rate swaps | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swaps - liabilities, carrying amount	31,890	54,927
Fair value on a recurring basis | Interest rate swaps | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Interest rate swaps - liabilities, carrying amount	0	0
Fair value on a recurring basis | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	28,678	49,377
Fair value on a recurring basis | Interest rate swaps | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Fair value on a recurring basis | Interest rate swaps | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	28,678	49,377
Fair value on a recurring basis | Interest rate swaps | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Fair value on a recurring basis | US treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	4,971
Fair value on a recurring basis | US treasuries | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0
Fair value on a recurring basis | US treasuries | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	4,971
Fair value on a recurring basis | US treasuries | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0
Fair value on a recurring basis | U.S. government agency securities - government-sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	20,565	22,629
Fair value on a recurring basis | U.S. government agency securities - government-sponsored enterprises | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Fair value on a recurring basis | U.S. government agency securities - government-sponsored enterprises | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	20,565	22,629
Fair value on a recurring basis | U.S. government agency securities - government-sponsored enterprises | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Fair value on a recurring basis | Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	30,497	24,779
Fair value on a recurring basis | Municipal securities | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Fair value on a recurring basis | Municipal securities | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	30,497	24,779
Fair value on a recurring basis | Municipal securities | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Fair value on a recurring basis | Other securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	2,242	2,279
Fair value on a recurring basis | Other securities | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Fair value on a recurring basis | Other securities | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	2,242	2,279
Fair value on a recurring basis | Other securities | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
GNMA | Fair value on a recurring basis | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	15,413	10,403
GNMA | Fair value on a recurring basis | Residential mortgage-backed securities | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
GNMA | Fair value on a recurring basis | Residential mortgage-backed securities | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	15,413	10,403
GNMA | Fair value on a recurring basis | Residential mortgage-backed securities | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
GNMA | Fair value on a recurring basis | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	6,080	5,464
GNMA | Fair value on a recurring basis | Commercial mortgage-backed securities | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
GNMA | Fair value on a recurring basis | Commercial mortgage-backed securities | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	6,080	5,464
GNMA | Fair value on a recurring basis | Commercial mortgage-backed securities | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Government Sponsored Enterprises | Fair value on a recurring basis | Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	88,557	105,006
Government Sponsored Enterprises | Fair value on a recurring basis | Residential mortgage-backed securities | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Government Sponsored Enterprises | Fair value on a recurring basis | Residential mortgage-backed securities | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	88,557	105,006
Government Sponsored Enterprises | Fair value on a recurring basis | Residential mortgage-backed securities | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Government Sponsored Enterprises | Fair value on a recurring basis | Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	25,731	13,365
Government Sponsored Enterprises | Fair value on a recurring basis | Commercial mortgage-backed securities | Fair Value Measurements - Level 1 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	0	0
Government Sponsored Enterprises | Fair value on a recurring basis | Commercial mortgage-backed securities | Fair Value Measurements - Level 2 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	25,731	13,365
Government Sponsored Enterprises | Fair value on a recurring basis | Commercial mortgage-backed securities | Fair Value Measurements - Level 3 Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure	$ 0	$ 0

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

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

X

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313

+ Details

Name:	us-gaap_DerivativeLiabilities
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

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=fbiz_OtherDebtandEquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=fbiz_GNMAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=fbiz_GovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: