XML 64 R47.htm IDEA: XBRL DOCUMENT
v3.19.2

Securities (Unrealized Losses Available for Sale) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value |  |
Fair Value Less than 12 Months | $ 1,751 | $ 8,416
Fair Value 12 Months or Longer | 33,936 | 90,849
Total Fair Value | 35,687 | 99,265
Unrealized Loss Less than 12 Months | 0 | 53
Unrealized Loss 12 Months or Longer | 407 | 2,254
Total Unrealized Loss | 407 | 2,307
U.S. government agency securities - government-sponsored enterprises |  |
Fair Value |  |
Fair Value Less than 12 Months |  | 0
Fair Value 12 Months or Longer |  | 990
Total Fair Value |  | 990
Unrealized Loss Less than 12 Months |  | 0
Unrealized Loss 12 Months or Longer |  | 9
Total Unrealized Loss |  | 9
Municipal securities |  |
Fair Value |  |
Fair Value Less than 12 Months | 0 | 0
Fair Value 12 Months or Longer | 1,127 | 4,371
Total Fair Value | 1,127 | 4,371
Unrealized Loss Less than 12 Months | 0 | 0
Unrealized Loss 12 Months or Longer | 3 | 69
Total Unrealized Loss | 3 | 69
Mortgage backed securities - government issued |  |
Fair Value |  |
Fair Value Less than 12 Months | 0 | 0
Fair Value 12 Months or Longer | 6,672 | 13,748
Total Fair Value | 6,672 | 13,748
Unrealized Loss Less than 12 Months | 0 | 0
Unrealized Loss 12 Months or Longer | 159 | 426
Total Unrealized Loss | 159 | 426
Mortgage backed securities - government-sponsored enterprises |  |
Fair Value |  |
Fair Value Less than 12 Months | 1,751 | 8,178
Fair Value 12 Months or Longer | 25,160 | 69,602
Total Fair Value | 26,911 | 77,780
Unrealized Loss Less than 12 Months | 0 | 46
Unrealized Loss 12 Months or Longer | 242 | 1,683
Total Unrealized Loss | 242 | 1,729
Other securities |  |
Fair Value |  |
Fair Value Less than 12 Months | 0 | 238
Fair Value 12 Months or Longer | 977 | 2,138
Total Fair Value | 977 | 2,376
Unrealized Loss Less than 12 Months | 0 | 7
Unrealized Loss 12 Months or Longer | 3 | 67
Total Unrealized Loss | $ 3 | $ 74

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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: |