XML 80 R70.htm IDEA: XBRL DOCUMENT
v3.19.1

Fair Value Disclosures (Measured on a Recurring Basis) (Details) - Fair value on a recurring basis - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Interest rate swaps |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Derivative Liability | $ 9,430 | $ 4,779
Interest rate swaps | Fair Value Measurements - Level 1 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Derivative Liability | 0 | 0
Interest rate swaps | Fair Value Measurements - Level 2 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Derivative Liability | 9,430 | 4,779
Interest rate swaps | Fair Value Measurements - Level 3 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Derivative Liability | 0 | 0
Interest rate swaps |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 8,337 | 4,637
Interest rate swaps | Fair Value Measurements - Level 1 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Interest rate swaps | Fair Value Measurements - Level 2 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 8,337 | 4,637
Interest rate swaps | Fair Value Measurements - Level 3 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
U.S. government agency securities - government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 994 | 990
U.S. government agency securities - government-sponsored enterprises | Fair Value Measurements - Level 1 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
U.S. government agency securities - government-sponsored enterprises | Fair Value Measurements - Level 2 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 994 | 990
U.S. government agency securities - government-sponsored enterprises | Fair Value Measurements - Level 3 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Municipal securities |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 5,820 | 5,886
Municipal securities | Fair Value Measurements - Level 1 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Municipal securities | Fair Value Measurements - Level 2 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 5,820 | 5,886
Municipal securities | Fair Value Measurements - Level 3 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Mortgage backed securities - government issued |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 40,123 | 19,628
Mortgage backed securities - government issued | Fair Value Measurements - Level 1 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Mortgage backed securities - government issued | Fair Value Measurements - Level 2 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 40,123 | 19,628
Mortgage backed securities - government issued | Fair Value Measurements - Level 3 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Mortgage backed securities - government-sponsored enterprises |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 107,676 | 109,478
Mortgage backed securities - government-sponsored enterprises | Fair Value Measurements - Level 1 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Mortgage backed securities - government-sponsored enterprises | Fair Value Measurements - Level 2 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 107,676 | 109,478
Mortgage backed securities - government-sponsored enterprises | Fair Value Measurements - Level 3 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Other securities |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 2,170 | 2,376
Other securities | Fair Value Measurements - Level 1 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 0 | 0
Other securities | Fair Value Measurements - Level 2 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | 2,170 | 2,376
Other securities | Fair Value Measurements - Level 3 Inputs |  |
Fair Value, Assets and Liabilities Measured on a Recurring Basis |  |
Assets, Fair Value Disclosure | $ 0 | $ 0

X
- Definition Fair Value, Assets and Liabilities Measured on a Recurring Basis [Line Items] + References No definition available. + Details
Name: | fbiz_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItemsLineItems
Namespace Prefix: | fbiz_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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=99377789&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://fasb.org/us-gaap/role/ref/legacyRef -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 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=us-gaap_InterestRateSwapMember
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_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_NontaxableMunicipalBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
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: |