XML 95 R80.htm IDEA: XBRL DOCUMENT
v3.20.4

Junior Subordinated Debt Owed to Unconsolidated Trusts (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Junior subordinated debt owed to unconsolidated trusts |  |
Junior subordinated debt owed to unconsolidated trusts | $ 71,468 | $ 71,308
Parent |  |
Junior subordinated debt owed to unconsolidated trusts |  |
Junior subordinated debt owed to unconsolidated trusts | $ 71,468 | $ 71,308
Trust Preferred Securities |  |
Junior subordinated debt owed to unconsolidated trusts |  |
Percentage limit on inclusion of qualifying trust preferred securities in Tier I Capital | 25.00% |
Trust preferred securities qualified as Tier I capital (as a percent) | 100.00% |
Maximum of holding companies assets retained | $ 15,000,000 |
Junior Subordinated Notes | Trust Preferred Securities |  |
Junior subordinated debt owed to unconsolidated trusts |  |
Maximum period to defer payment of interest on the notes and, therefore, distributions on the trust preferred securities | 5 years |

X
- Definition Represents the percentage limit on inclusion of qualifying trust preferred securities in Tier 1 Capital. + References No definition available. + Details
Name: | buse_LimitOnInclusionOfQualifiedTrustPreferredSecuritiesInTierOneCapitalPercentage
Namespace Prefix: | buse_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the asset threshold for Companies to maintain trust preferred securities in capital. + References No definition available. + Details
Name: | buse_MaximumOfHoldingCompaniesAssetsRetained
Namespace Prefix: | buse_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the maximum period during which the entity has the right to defer payment of interest on the debt instrument and distributions on the trust preferred securities. + References No definition available. + Details
Name: | buse_MaximumPeriodToDeferInterestOnDebtInstrumentAndDistributionsOnTrustPreferredSecurities
Namespace Prefix: | buse_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of trust preferred securities that qualified as Tier 1 capital. + References No definition available. + Details
Name: | buse_PercentageOfTrustPreferredSecuritiesQualifiedAsTierOneCapital
Namespace Prefix: | buse_
Data Type: | num:percentItemType
Balance Type: | na
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTermsAxis=us-gaap_TrustPreferredSecuritiesSubjectToMandatoryRedemptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_JuniorSubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |