BUSE


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets
us-gaap:ConsolidatedEntities

us-gaap:CapitalToRiskWeightedAssets
us-gaap:ConsolidatedEntities

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:PlanName

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpense

us-gaap:InterestIncomeExpenseNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
us-gaap:InterestIncomeOperating

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:ProfitLoss
us-gaap:ProductOrService
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:TierOneRiskBasedCapital
us-gaap:ConsolidatedEntities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:EquitySecuritiesFvNi
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:CreditFacility, us-gaap:VariableRate
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

buse:AccretionOfPremiumsAndDiscountsOnTimeDeposits

buse:AmortizationOfDiscountOnFederalHomeLoanBankAdvances
us-gaap:BusinessAcquisition
buse:BusinessCombinationConsiderationTransferredPerShareInCash
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
buse:BusinessCombinationSharesReceived
dei:LegalEntity
buse:BusinessCombinationSpecialCashDividend
dei:LegalEntity, us-gaap:StatementScenario
us-gaap:BusinessAcquisition

buse:CollateralDependentLoans

buse:CommercialAndMortgageTransferToRealEstate

buse:CommonStockDividendsPerRestrictedStockShareDeclared
us-gaap:StatementEquityComponents
buse:CommonStockDividendsRestrictedStockDeclared
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
buse:DerivativeGainLossesOnDerivativePayFixedReceiveFloating
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
buse:DerivativeGainLossesOnDerivativePayFloatingReceiveFixed
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
buse:FinancingReceivableFeesCaresAct

buse:GainLossOnLifeInsuranceProceeds

buse:GainLossOnSaleOfLoansNet

buse:GainsLossesOnSalesOfOtherRealEstateExcludingAllowance

buse:IncreaseDecreaseInReserveForUnfundedCommitments

buse:InterchangeExpense

buse:InterestExpenseSeniorNotes
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment
buse:LoansAndLeasesReceivableLimitAboveWhichLoansAreAnnuallyReviewed
us-gaap:InternalCreditAssessment
us-gaap:Range, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
buse:LoansAndLeasesReceivableLimitAboveWhichLoansAreProcessedThroughExpeditedUnderwritingProcess
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
buse:LoansInProcessOfForeclosure
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
buse:NetFeeIncomeAccretion
us-gaap:Range, us-gaap:SubsequentEventType
buse:NonOperatingExpensesBeforeTax
us-gaap:SubsequentEventType
buse:NumberOfBankingCentersConsolidated

buse:OperatingLeasePaymentsFixedPayment

buse:OperatingLeasePaymentsLiabilityReduction

buse:RepurchaseOfStockTreasuryStock
us-gaap:StatementEquityComponents
us-gaap:AwardType
buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentsEarnedWeightedAverageGrantDateFairValue

buse:StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit
us-gaap:StatementEquityComponents

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet

us-gaap:AmortizationOfMortgageServicingRightsMSRs

us-gaap:BankOwnedLifeInsuranceIncome
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationAcquisitionRelatedCosts
us-gaap:BusinessAcquisition, us-gaap:IncomeStatementLocation
us-gaap:IncomeStatementLocation
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommunicationsAndInformationTechnology

us-gaap:DebtAndEquitySecuritiesRealizedGainLoss
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
us-gaap:DebtInstrumentDecreaseForgiveness

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:Depreciation
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainOnDerivative
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeLossOnDerivative
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EquipmentExpense

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:FinancingInterestExpense

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancialInstrumentPerformanceStatus
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivableSignificantPurchases

us-gaap:GainLossOnSaleOfInvestments

us-gaap:GainLossOnSaleOfMortgageLoans
us-gaap:ProductOrService

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf

us-gaap:ImpairmentOfRealEstate

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInEquitySecuritiesFvNi

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseJuniorSubordinatedDebentures

us-gaap:InterestExpenseOtherLongTermDebt

us-gaap:InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase

us-gaap:InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase

us-gaap:InterestExpenseSubordinatedNotesAndDebentures
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:InterestExpenseTradingLiabilities

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeOther

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:LaborAndRelatedExpense

us-gaap:LeaseCost

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue

us-gaap:LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans

us-gaap:MortgageServicingRightsMSRImpairmentRecovery

us-gaap:NoninterestExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:OccupancyNet

us-gaap:OperatingLeaseCost

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
us-gaap:StatementEquityComponents

us-gaap:OtherNoninterestExpense

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale

us-gaap:PaymentsForProceedsFromLoansReceivable

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross

us-gaap:PaymentsToAcquireLifeInsurancePolicies

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:ProceedsFromBankDebt

us-gaap:ProceedsFromLifeInsurancePolicies

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromOtherDebt

us-gaap:ProceedsFromSaleOfEquityMethodInvestments
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
us-gaap:ProceedsFromSaleOfLoansReceivable

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale

us-gaap:ProceedsFromSaleOfOtherRealEstate

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:RepaymentsOfBankDebt

us-gaap:RepaymentsOfOtherDebt

us-gaap:RevenueNotFromContractWithCustomerExcludingInterestIncome
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:BusinessAcquisition
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice
us-gaap:Range, us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShortTermLeaseCost

us-gaap:StockIssuedDuringPeriodValueAcquisitions
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:VariableLeaseCost

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

buse:AvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
buse:BankPropertyHeldForSaleFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

buse:BrokeredDeposits

buse:BrokeredSavingDepositsAndMoneyMarketDeposits

buse:BrokeredTimeDeposits
us-gaap:BusinessAcquisition
buse:BusiPercentageOfCashTransferredInBusinessCombinationAsConsideration.nessCombinationCashConsiderationTransferredPercentage
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
buse:BusinessCombinationEquityConsiderationTransferredPercentage
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits
us-gaap:BusinessAcquisition
buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoans
us-gaap:BusinessAcquisition
buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageServicingRights
us-gaap:BusinessAcquisition
buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets
us-gaap:BusinessAcquisition
buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherBorrowings
us-gaap:BusinessAcquisition
buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilities
us-gaap:BusinessAcquisition
buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSecuritiesAvailableForSale

buse:CommonEquityTierOneRiskBasedCapital
us-gaap:ConsolidatedEntities

buse:CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities

buse:CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities

buse:CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities

buse:CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
us-gaap:ConsolidatedEntities

buse:CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets
us-gaap:ConsolidatedEntities

buse:CustomerAssetsHeldInTrust

buse:DeferredTaxAssetsLeaseLiabilities

buse:DeferredTaxAssetsPurchaseAccountingAdjustments

buse:DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationCosts

buse:DeferredTaxLiabilitiesPurchaseAccountingAdjustments

buse:DeferredTaxLiabilitiesUnrealizedGainsOnEquitySecurities

buse:DeferredTaxLiabilitiesUnrealizedGainsOnSecuritiesAvailableForSaleAndCashFlowHedges

buse:DepositsInterestBearingTransactionDepositsSavingDepositsAndMoneyMarketDeposits
us-gaap:DerivativeInstrumentRisk
buse:DerivativeSwapTypeVariableRate
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
buse:FinancingReceivableAmortizedCostCaresAct
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
buse:FinancingReceivableForgivenessApplicationAmount
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
buse:FinancingReceivablePaymentDeferralModificationsNotClassifiedAsTroubledDebtRestructuringAmount

buse:FinancingReceivablePriorLoans
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

buse:FinancingReceivablePurchasedCreditImpairedEvaluatedForImpairment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:InterestBearingTransactionDeposits
us-gaap:ConsolidatedEntities
buse:InvestmentsInBankingSubsidiaries
us-gaap:ConsolidatedEntities
buse:InvestmentsInNonBankingSubsidiaries

buse:LesseeOperatingLeaseLiabilityInterest

buse:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour
us-gaap:ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTerms
buse:LimitOnInclusionOfQualifiedTrustPreferredSecuritiesInTierOneCapitalPercentage
us-gaap:RelatedPartyTransactionsByRelatedParty
buse:LoansAndLeasesReceivableRelatedPartiesUnusedCommitments

buse:LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
buse:OtherServicingAssetAtFairValueAmount
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
buse:PaycheckProtectionProgramLoansAcquiredAmount
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
buse:PaycheckProtectionProgramLoansOriginated
us-gaap:ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTerms
buse:PercentageOfTrustPreferredSecuritiesQualifiedAsTierOneCapital
us-gaap:Collateral
buse:RealEstateInForeclosure

buse:ReserveForUnfundedCommitments
us-gaap:AwardType
buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue
us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:PlanName
us-gaap:AwardType
buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue
us-gaap:AwardType
buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstandingWeightedAverageGrantDateFairValue

buse:TimeDeposits250000OrMore

us-gaap:AccountsReceivableGross
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:InternalCreditAssessment

us-gaap:AccountsReceivableNet
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:Range, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:AlternativeInvestmentMeasurementInput
us-gaap:Range, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique
us-gaap:StatementEquityComponents
us-gaap:AociBeforeTaxAttributableToParent

us-gaap:AociDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossCumulativeGainLossAfterTax
us-gaap:StatementEquityComponents
us-gaap:AociTaxAttributableToParent

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionSharePrice
us-gaap:StatementScenario, us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationAcquiredReceivablesEstimatedUncollectible
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationAcquiredReceivablesGrossContractualAmount
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment

us-gaap:Capital
us-gaap:ConsolidatedEntities

us-gaap:CapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities

us-gaap:CapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities

us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashAndDueFromBanks

us-gaap:CashCashEquivalentsAndFederalFundsSold
us-gaap:ConsolidatedEntities

us-gaap:CashSurrenderValueOfLifeInsurance

us-gaap:DebtInstrumentCarryingAmount
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:Collateral
us-gaap:DebtSecuritiesAvailableForSaleRestricted

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions

us-gaap:DebtWeightedAverageInterestRate

us-gaap:DeferredDiscountsFinanceChargesAndInterestIncludedInReceivables

us-gaap:DeferredFinanceCostsNet
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses
us-gaap:BusinessAcquisition
us-gaap:DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesMortgageServicingRights

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:Deposits
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeAssetNotionalAmount
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAssets
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeAverageVariableInterestRate
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeCollateralRightToReclaimCash
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeLiabilities
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByMeasurementFrequency
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeLiabilityNotionalAmount
us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:AwardType

us-gaap:EquityMethodInvestmentsFairValueDisclosure

us-gaap:FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
us-gaap:FinancialInstrument

us-gaap:FederalHomeLoanBankAdvancesLongTerm

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities
us-gaap:FinancingReceivableBeforeAllowanceForCreditLossAndFee

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableModificationsRecordedInvestment
us-gaap:FinancialInstrumentPerformanceStatus

us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivableRecordedInvestmentPastDue
us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivableRevolving
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableUnamortizedLoanFeeCost

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:ForeclosedAssets
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:HedgedLiabilityFairValueHedge

us-gaap:ImpairedFinancingReceivableRecordedInvestment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:ImpairedFinancingReceivableRelatedAllowance
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:InterestBearingDepositLiabilities

us-gaap:InterestBearingDepositsInBanks
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:InterestPayableCurrentAndNoncurrent
us-gaap:DerivativeInstrumentRisk
us-gaap:InterestRateDerivativesAtFairValueNet
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:InterestReceivable

us-gaap:JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LifeSettlementContractsFairValueMethodFaceValue

us-gaap:LoansAndLeasesReceivableRelatedParties

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LongTermDebtFairValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LongTermDebtMeasurementInput
us-gaap:FairValueByMeasurementFrequency
us-gaap:Range, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:Range, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique

us-gaap:MortgageLoansInProcessOfForeclosureAmount

us-gaap:NoninterestBearingDepositLiabilities
us-gaap:CreditFacility
us-gaap:ObligationWithJointAndSeveralLiabilityArrangementAmountRecognized

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities
us-gaap:Range, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:OtherRealEstateOwnedMeasurementInput
us-gaap:Range, us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:ValuationTechnique

us-gaap:OtherShortTermBorrowings
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:RealEstateAcquiredThroughForeclosure
us-gaap:Collateral
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure

us-gaap:SecuritiesSoldUnderAgreementsToRepurchase

us-gaap:SeniorNotes
us-gaap:ConsolidatedEntities

us-gaap:ServicingAssetAtFairValueAmount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
us-gaap:BusinessAcquisition
us-gaap:SharePrice
us-gaap:StatementScenario, us-gaap:BusinessAcquisition

us-gaap:ShortTermBorrowings
us-gaap:ShortTermDebtType

us-gaap:StockholdersEquityBeforeTreasuryStock

us-gaap:SubordinatedDebt
us-gaap:ConsolidatedEntities

us-gaap:TierOneLeverageCapital
us-gaap:ConsolidatedEntities

us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities

us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets

us-gaap:TierOneLeverageCapitalToAverageAssets
us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
us-gaap:ConsolidatedEntities

us-gaap:TimeDepositMaturitiesAfterRollingYearFive

us-gaap:TimeDepositMaturitiesAfterYearFive

us-gaap:TimeDepositMaturitiesNextRollingTwelveMonths

us-gaap:TimeDepositMaturitiesRollingYearFive

us-gaap:TimeDepositMaturitiesRollingYearFour

us-gaap:TimeDepositMaturitiesRollingYearThree

us-gaap:TimeDepositMaturitiesRollingYearTwo

us-gaap:TimeDepositMaturitiesYearFive

us-gaap:TimeDepositMaturitiesYearFour

us-gaap:TimeDepositMaturitiesYearThree

us-gaap:TimeDepositMaturitiesYearTwo

us-gaap:TimeDeposits

us-gaap:TimeDeposits100000OrMore
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:TimeDepositsAtCarryingValue

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
NonCurrent Assets
Operating Lease Right Of Use Asset
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Stockholders Equity
Common Stock Value
Per Share
Common Stock Dividends Per Share Cash Paid
CashFlow
Payments To Acquire Property Plant And Equipment
NetCashProvidedByUsedInOperatingActivities
Gain Loss On Sale Of Property Plant Equipment
NetCashProvidedByUsedInInvestingActivities
Payments To Acquire Property Plant And Equipment
NetCashProvidedByUsedInFinancingActivities
Payments For Repurchase Of Common Stock
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
BanksAndOrInsurance
Interest And Dividend Income Operating
AssetsBanks
Property Plant And Equipment Net
LiabilitiesBanks
Short Term Borrowings

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁▁█████████████████0.0580.0560.0560.0560.0560.0560.0560.0560.0560.0560.0490.0490.0490.0490.0490.0460.0390.0390.0390.0390.0390.0290.0290.0290.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.088NA0.081NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 55.730883NANA54.73854.70554.913NA55.64655.94153.578NA49.24749.22449.179NA45.76438.75238.754NA38.65435.29228.929NA29.14287.56387.508NA87.33987.26387.231NA87.07686.7386.711NA86.66286.63786.63NA86.60886.617NANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 55.050071NANA54.58654.48954.662NA55.4155.63853.277NA48.89248.81548.775NA45.32438.31138.293NA38.25634.98428.739NA28.98987.00686.957NA86.9286.89586.866NA86.80186.7386.703NA86.65486.62886.62NA86.59786.597NANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:CommonStockNANANA0.3NANANA0.237NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▆█▆▇▆▄▆▅▅▆▆▆▆▅▃▅▅▅▄▅▄▄▅▄▂▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁0.540.690.520.560.470.280.520.450.430.480.520.550.510.450.250.410.430.40.30.40.350.360.370.360.110.090.080.10.090.090.070.080.080.060.050.050.050.080.050.080.070.090.090000000000000020.070.07
us-gaap:EarningsPerShareDiluted ▆█▆▇▆▄▆▅▅▆▆▆▆▅▃▅▅▅▄▅▄▄▄▄▂▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁0.530.690.520.560.470.280.520.450.430.480.510.550.510.450.250.410.430.390.30.40.350.360.360.360.110.090.080.10.090.090.070.080.080.060.050.050.050.080.050.080.070.090.090000000000000020.070.07
us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets ████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1.318e-051.384e-051.344e-051.308e-051.273e-071.22e-071.249e-071.219e-071.243e-071.2420000000000001e-071.299e-071.25e-071.244e-071.232e-071.214e-071.226e-071.36e-071.369e-071.2920000000000002e-071.28e-071.259e-071.376e-071.3289999999999998e-071.58e-071.618e-071.6359999999999998e-071.738e-07NANANA1.6919999999999998e-07NANANA1.734e-07NANANA1.7349999999999999e-07NANANANANANA
us-gaap:CapitalToRiskWeightedAssets ████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1.641e-051.739e-051.704e-051.663e-051.623e-071.385e-071.403e-071.371e-071.396e-071.3950000000000002e-071.483e-071.434e-071.442e-071.4319999999999999e-071.415e-071.438e-071.618e-071.487e-071.4039999999999999e-071.391e-071.365e-071.502e-071.455e-071.7069999999999999e-071.7460000000000001e-071.764e-071.866e-07NANANA1.8210000000000002e-07NANANA1.863e-07NANANA1.865e-07NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AllocatedShareBasedCompensationExpense █▁2.4371.4NANA1.0691.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax █▂▆▇▇▇▆▆█▇▇▆▅▄▃▅▄▄▂▄▄▄▂▃▂▃▂▂▃▂▂▃▁▂▁▂▂▂▂▃▃▂▂▂36.678.32826.12929.31729.74233.50526.1427.59237.11733.87631.50224.723.67115.6589.02418.93816.91914.9994.73314.20914.03714.4116.19712.1337.02210.1777.7437.35610.678.3665.0158.5270.5365.5622.4066.5416.3017.5275.8769.32310.4928.2743.4177.154NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▅█▅▆▅▂▅▅▄▅▅▅▅▄▄▄▃▃▁▃▂▁36.62848.63536.22139.94732.81819.2235.71732.8830.78735.05434.18135.9433.61130.19530.69828.34525.1623.90817.72523.51119.08116.1NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▃▅▄▄▃▂▃▄▃▄▄▄▄▄█▄▄▄▃▄▃▃▃▂▃▂▂▂▂▂▂▂▂▂▁▁▁▂▁▂▂▂▂▁▁6.86210.8197.8769.1187.0123.8567.1468.0526.7029.5858.8919.0818.7498.27818.4059.5618.6818.7386.278.0896.6985.6665.8685.4085.5933.8274.7634.7084.0254.0383.5283.5723.7873.2242.5562.3311.8773.7332.7534.1513.9554.1113.7221.9212.652
us-gaap:IncomeTaxesPaid NANA2.814.8854.010.59.524.659.8650.693.05615.805NANA7.056.25313.0580.0586.2864.64.15.27.63.82.643.133.7090.1231.4531.111.3432.2960.01.110.4150.560.00.070.01.850.6360.270.0NANA
us-gaap:InterestAndFeeIncomeLoansAndLeases ▆▆▇▇▇▇███▇▆▆▆▆▆▅▃▃▄▄▃▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▃61.40462.56571.52569.80971.08972.53676.2978.08378.03171.78964.4163.58962.2960.9664.04856.76241.23640.59743.48343.00236.18725.14426.54425.09924.58624.16623.87223.55322.43722.53322.97623.09623.222.96124.16424.41224.51225.52626.86728.24329.17330.50832.95434.32635.544
us-gaap:InterestExpense ▃▃▄▅▅▇▇██▇▆▅▅▄▄▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▃▃▄▄▅7.1467.4388.3679.87610.4215.016.8618.21518.03815.89813.81111.9879.9538.8767.8016.5783.6432.9143.0043.0572.5861.5821.521.5351.5591.5931.571.61.6351.6941.8812.0032.2152.5322.9553.4663.9514.3984.7515.0846.0326.5597.6288.83210.884
us-gaap:InterestIncomeExpenseNet ▇▇█▇█▇███▇▆▆▆▆▇▅▄▃▄▄▃▁▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂64.54264.89372.93669.75370.81369.43371.93673.47673.42868.38360.50360.77460.37259.75763.04655.94142.36642.01344.63544.13137.95227.94229.59928.19527.35126.6726.08725.91125.02124.55725.00425.23325.24524.58325.62925.54525.27425.69826.47827.72727.84128.34729.41129.63529.1
 us-gaap:InterestIncomeOperating us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities buse:PaycheckProtectionProgramNANANA4.23.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▄▁▅▇▅▆███▆▆▄▄▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▃▃▃▄▅9.8041.76711.61416.22611.3714.39119.34718.10818.24614.87613.9749.4539.8877.3257.8575.3233.1543.0083.0162.4532.6141.5911.5311.5541.5621.6351.591.6391.6661.771.952.082.3592.6973.1153.6514.0834.6744.775.5246.2527.4077.9910.883NA
us-gaap:NetIncomeLoss ▆█▆▇▅▃▆▅▅▅▅▆▅▅▃▄▃▃▂▃▃▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁▁▂▁▂▂▂▂▁29.76637.81628.34530.82925.80615.36428.57124.82824.08525.46925.2926.85924.86221.91712.29318.78416.47915.1711.45515.42212.38310.43410.68310.6269.9367.7617.5939.1098.1857.8876.927.9337.446.4334.9174.9094.8887.6435.7467.577.4479.117.3066.022NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▆█▆▇▆▃▆▅▅▅▅▆▅▅▃▄▄▃▃▃▃▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁▁▂▁▂▁▂▁▁▁29.76637.81628.34530.82925.80615.36428.57124.82824.08525.46925.2926.85924.86221.91712.29318.78416.47915.1711.45515.42212.38310.43410.52810.4449.7557.5797.4118.9278.0047.7056.0127.0246.5325.5254.0094.03.986.7354.5126.5216.1647.3345.9844.7394.402
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ▇█▇▇▆▁▇▅0.1370.6090.2070.206-0.149-2.2480.392-0.592NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▆█▅▆▅▂▆▅▄▅▅▅▅▄▁▃▂▂▁▂29.76637.81628.34530.82925.80615.36428.57124.82824.08525.46925.2926.85924.86221.91712.29318.78416.47915.1711.45515.422NANANANANANANANANANANANANANANANANANANANA7.447NANANA5.685
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService buse:RemittanceProcessing▁█4.3494.418NANA3.7183.753NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:AssetManagement1█▁13.00212.584NANA10.19311.555NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:Banking▅▄▄▃▁▄▆██▄▂▂▂8.6118.0378.2048.0147.0258.3619.0489.8429.6968.0977.3037.347.29NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:DepositAccountNANANA3.9953.7183.7533.7653.783.7173.783.7573.633.566NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:InvestmentAdviceNANANA10.54810.19311.55511.2238.8219.4889.029NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets █▇▇▇▇▆▆▆▆▆▄▄▄▄▄▄▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁12415.44910759.56310544.04710539.62810835.9659721.4059695.7299753.769612.6679537.3347702.3577889.3857775.5447778.7467860.646913.7895531.3675438.9355425.175592.2415510.1993890.633998.9763863.5653885.2743937.1843665.6073520.9173507.4493542.0613539.5753532.0243511.3893648.313618.0563529.6643524.7233536.993402.1223392.8853470.888NA3605.003NANA
us-gaap:Liabilities █▇▆▆▇▆▆▆▆▆▄▄▄▄▄▄▃▃▃▃▃▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁11069.7589493.7419273.9789283.9239599.8818503.828475.2958537.7798409.0598351.1936707.3936917.2456818.3626836.66925.6376077.7214918.2524836.5884830.8564996.1674922.0823507.3663625.793419.3373442.6863497.3843231.9683090.8893080.6823121.7273124.2113117.6453101.3593234.6053209.2593112.3433109.8763124.3242992.8552985.4193041.112NA3184.498NANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▇▆▆▆▆▆▄▄▄▄▄▄▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁12415.44910759.56310544.04710539.62810835.9659721.4059695.7299753.769612.6679537.3347702.3577889.3857775.5447778.7467860.646913.7895531.3675438.9355425.175592.2415510.1993890.633998.9763863.5653885.2743937.1843665.6073520.9173507.4493542.0613539.5753532.0243511.3893648.313618.0563529.6643524.7233536.993402.1223392.8853470.888NA3605.003NANA
us-gaap:StockholdersEquity █▇▇▇▇▇▇▇▇▇▅▅▅▅▅▄▃▃▃▃▃▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1345.6911265.8221270.0691255.7051236.0841217.5851220.4341215.9811203.6081186.141994.964972.14957.182942.146935.003836.068613.115602.347594.314596.074588.117383.264373.186444.228442.588439.8433.639430.028426.767420.334415.364414.379410.03413.705408.797417.321414.847412.666409.267407.466429.776NA420.505NANA
us-gaap:TierOneRiskBasedCapital █▇▇▇▇▇▇▆▆▆▅▅▅▅▄▄▃▃▃▃▃▁▁▂▂▂▂1062.1821007.986983.033964.399941.243921.827922.395907.23904.365898.138783.924764.579746.561729.259718.101674.354576.286565.391557.862551.711538.764400.651394.24459.497461.651455.32455.354NANANA417.564NANANA390.304NANANA379.483NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▇▃▅▄█▂▄▄▃▂▂▁▂▃▃▁▂▃▁920.81404.802688.537479.7211050.072342.848529.288525.457420.207330.407239.973160.652230.73367.525353.272214.381294.1439.511166.706NANANA319.28NANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:PropertyPlantAndEquipmentGross NANA225.138NANANA232.768NANANA192.65NANANA183.228NANANA137.511NANANA120.259NANANA116.371NANANA117.313NANANA129.457NANANA124.082NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType buse:FurnitureAndEquipmentNANA53.766NANANA54.328NANANA48.06NANANA42.323NANANA37.543NANANA34.039NANANA32.018NANANA33.622NANANA41.626NANANA38.324NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingAndBuildingImprovementsNANA130.61NANANA134.473NANANA108.137NANANA104.656NANANA73.484NANANA64.27NANANA62.794NANANA62.159NANANA65.099NANANA62.52NANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandAndLandImprovementsNANA40.762NANANA43.967NANANA36.453NANANA36.249NANANA26.484NANANA21.95NANANA21.559NANANA21.532NANANA22.732NANANA23.238NANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA89.947NANANA81.501NANANA74.978NANANA66.315NANANA59.65NANANA57.171NANANA52.397NANANA51.486NANANA58.39NANANA54.684NANANANANANA
us-gaap:AmortizationOfIntangibleAssets █▇▇▇▇██▇▇▆▃▄▄▄▄▃▃▃▃▃▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂2.652.4012.4392.4932.5192.5572.6812.362.4122.0941.4041.4451.491.5151.571.2861.1821.2071.2811.2821.1090.7660.8080.8070.8080.7690.7030.7010.7330.7470.7830.7830.7830.7830.8340.8270.8270.8270.8850.8850.8840.8841.0211.0221.022
us-gaap:PropertyPlantAndEquipmentNet ▇▆▇▇▇█████▅▅▅▅▅▄▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂145.437132.669135.191144.001146.951149.772151.267153.641149.726147.958117.672119.162119.835118.985116.913100.64279.49877.96777.86180.28781.00962.91163.08863.8864.83464.99663.97464.36964.56265.02965.82767.14869.37770.13671.06772.21470.11969.4169.39870.17971.162NA73.218NANA
us-gaap:Goodwill ██████████▇▇▇▇▇▆▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁317.521311.536311.536311.536311.536311.536311.536322.699314.343314.343267.685267.685267.685267.685269.346218.796102.814102.814102.814102.356102.18125.5125.5125.5125.5125.5120.68620.68620.68620.68620.68620.68620.68620.68620.68620.68620.68620.68620.68620.68620.686NA20.686NANA
us-gaap:IntangibleAssetsNetExcludingGoodwill █▆▇▇▇▇█▇██▄▄▅▅▅▄▂▂▂▃▃▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂64.27449.58451.98554.42456.51759.03661.59358.62460.98463.39632.87334.27835.72237.21238.72728.76616.07317.25518.46219.74321.0256.6677.4328.249.0489.8566.6877.398.0928.8249.57110.35411.13811.9212.70313.53714.36415.19116.01816.90317.788NA19.556NANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA51.985NANANA61.593NANANA32.873NANANA38.727NANANA18.462NANANA7.432NANANA6.687NANANA9.571NANANA12.703NANANA16.018NANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CoreDepositsNANA43.347NANANA51.1NANANA31.836NANANA37.371NANANA17.338NANANA5.231NANANA4.254NANANA6.124NANANA8.174NANANA10.373NANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationshipsNANA8.638NANANA10.493NANANA1.037NANANA1.356NANANA1.124NANANA2.201NANANA2.433NANANA3.447NANANA4.529NANANA5.645NANANANANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA3.569NANANANANANANA11.431NANANA17.296NANANA20.224NANANA21.638NANANA22.173NANANA35.642NANANA39.373NANANA48.236NANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▃▁▂▁▃▄▅▆▇█8.2287.3337.7147.2518.5119.0749.499.97910.42610.898NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EquitySecuritiesFvNi ▆▂▁█▁▁▂▁▁13.957.1465.5317.8085.1264.9365.9525.695.362NA6.169NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:TimeDepositMaturitiesYearOne NANA775.495NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo █▃▅▁1.7241.4091.5551.288NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▇▁█▄1.2890.9741.3581.129NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour █▁▅▃1.050.840.9570.894NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA0.84NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA1.7922.647NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity █▇▇▇▇▇▇▇▇▇▅▅▅▅▅▄▃▃▃▃▃▁▁▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1345.6911265.8221270.0691255.7051236.0841217.5851220.4341215.9811203.6081186.141994.964972.14957.182942.146935.003836.068613.115602.347594.314596.074588.117383.264373.186444.228442.588439.8433.639430.028426.767420.334415.364414.379410.03413.705408.797417.321414.847412.666409.267407.466429.776NA420.505NANA
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▁▁▁█████████████████0.0580.0560.0560.0560.0560.0560.0560.0560.0560.0560.0490.0490.0490.0490.0490.0460.0390.0390.0390.0390.0390.0290.0290.0290.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.088NA0.081NANA
us-gaap:AdditionalPaidInCapital █▇▇▇▇▇▇▇▇▇▆▆▆▆▆▅▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1316.7161255.0441253.361250.3911248.0451249.3011248.2161247.561246.161247.341080.0841079.1111082.3231084.4111084.889988.972780.916780.427781.716783.409785.825591.076591.053590.648593.789593.609593.687593.52593.279593.164593.144593.458594.374594.313594.411594.47594.364594.185594.009594.178594.308NA562.375NANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▆▆▆▆▆▅▅▅▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁62.92645.89720.834.718-13.951-27.599-14.813-31.868-44.878-57.125-72.167-87.532-104.504-119.467-132.122-135.552-145.996-155.507-163.689-168.552-177.372-184.792-190.265-195.832-201.851-207.213-210.384-213.386-217.906-221.524-225.722-228.222-231.747-234.796-240.321-233.838-234.343-234.836-238.085-239.441-242.499NA-249.418NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▃▇██▇▅▅▅▃▂▁▁▁▂▃▃▃▃▄▄▄▃▄▄▄▄▄▄▄▃▄▄▅▅▅▅▅▅▅▄10.7253.82133.30935.52537.03733.10114.9617.39114.6271.595-6.812-13.024-10.865-9.674-2.810.4590.305-0.1350.0366.7587.9716.3172.346.8265.3198.2335.8175.6677.424.9354.4566.3615.76712.67113.54216.05314.42113.00813.12412.99411.241NA9.032NANA
us-gaap:TreasuryStockValue █▇▇▆▆▇▅▃▂▁▁▁▂▂▃▃▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▆▆▆▆▆▆▆▆▆44.73438.99637.48634.98535.10337.27427.98517.15812.3575.7256.196.4649.82113.17315.00317.85722.14922.47723.78825.5828.34629.36629.97130.10727.42127.58128.23328.52528.77828.99329.26629.9731.11631.23531.58731.69931.9332.02632.11632.18332.183NA32.183NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▄▅▄▄▃▃▃▃▄▄▄▃▅▅▄▁█▃▃36.72845.53767.88546.68435.91718.81328.48514.9511.09536.26955.41135.37318.4593.31374.00444.214-51.43186.5710.71826.285NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities █▁▇▃▂▄▆▅▆▅█▄▄▆▄▅▄▆▅▆304.626-545.848146.297-295.261-405.472-181.22845.2910.1767.895-48.398250.055-186.698-133.25414.547-205.116-12.879-159.78883.933-40.8782.772NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▄▃▁█▂▂▃▃▃▁▃▃▂▄▂▃▃▂▃174.654216.576-5.366-321.7741076.779-24.025-69.94590.12920.81102.563-226.14581.247-21.991-93.607270.003-111.05465.8072.302-163.96964.706NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▇▃▅▁█▃▄▅▅▅▅▄▃▄▅▄▃▆516.008-283.735208.816-570.351707.224-186.443.831105.2589.890.43479.321-70.078-136.79514.253138.891-79.719-145.411272.805NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▄▅▄▄▃▃▃▃▄▄▄▃▅▅▄▁█▃▃36.72845.53767.88546.68435.91718.81328.48514.9511.09536.26955.41135.37318.4593.31374.00444.214-51.43186.5710.71826.285NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▆█▆▇▅▃▆▅▅▅▅▆▅▅▃▄▃▃▂▃▃▂▂▂▂▂▂▂▂▂▁▂▂▁▁▁▁▂▁▂▂▂▂▁29.76637.81628.34530.82925.80615.36428.57124.82824.08525.46925.2926.85924.86221.91712.29318.78416.47915.1711.45515.42212.38310.43410.68310.6269.9367.7617.5939.1098.1857.8876.927.9337.446.4334.9174.9094.8887.6435.7467.577.4479.117.3066.022NA
us-gaap:ProfitLoss ▆█▅▆▅▂▆▅▄▅▅▅▅▄▁▃▂▂▁▂29.76637.81628.34530.82925.80615.36428.57124.82824.08525.46925.2926.85924.86221.91712.29318.78416.47915.1711.45515.422NANANANANANANANANANANANANANANANANANANANA7.447NANANA5.685
us-gaap:ShareBasedCompensation ▇▅█▇▄▄▃▄▄▃▄▃▃▃▃▃▂▂▂▂▂▂▂▂▁▂▂▂▁▁▂▁▁▁▂▂▁▁▁▁▁▁▁▁2.4371.4482.7222.2051.0691.1390.7611.2051.0171.0141.0550.9440.8740.8480.8170.8020.5880.5450.4940.5170.4030.3890.4170.4090.2510.3410.3520.3560.2550.2240.4290.2550.1440.2510.2690.2730.2290.220.1790.1660.0750.0680.0680.068NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities █▁▇▃▂▄▆▅▆▅█▄▄▆▄▅▄▆▅▆304.626-545.848146.297-295.261-405.472-181.22845.2910.1767.895-48.398250.055-186.698-133.25414.547-205.116-12.879-159.78883.933-40.8782.772NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▃▂▁▂▄▄▇▇▂▂▃▆▇▆█▆▄▄▄▆▃▂▂▃▂▂▃▂▂▁▂▂▂▃▆▄▃▂▁▂▂▁▂1.1821.9111.040.1290.7152.3142.4924.8284.8661.0521.1821.8424.0864.5083.6445.2823.9592.0952.2432.0663.4471.2350.8490.9341.2691.0620.9861.2440.9520.5960.270.5690.7730.9371.6923.5092.0451.3650.680.3830.9690.7160.3140.722NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▄▃▁█▂▂▃▃▃▁▃▃▂▄▂▃▃▂▃174.654216.576-5.366-321.7741076.779-24.025-69.94590.12920.81102.563-226.14581.247-21.991-93.607270.003-111.05465.8072.302-163.96964.706NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ██████▇▇▇▇▆▆▆▆▆▅▅▅▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▁▇▃▃▃▃▃▃▃▃▃12.48412.51311.99511.99411.96812.05511.59211.63211.68110.2669.7729.7569.7439.7398.7368.2076.8856.8796.4856.5044.884.8795.0334.5364.5274.5234.5254.5234.5223.6544.3784.384.3740.90811.3074.3754.3724.3733.8454.8744.7134.9113.9043.904NA
us-gaap:PaymentsForRepurchaseOfCommonStock ▅▂▃▁▁▇█▄5.7381.512.6030.0-0.0039.67210.9694.89NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:CreditFacility,us-gaap:VariableRate buse:SecondAmendmentToRevolvingCreditFacility,buse:OneMonthLondonInterbankOfferedRateLiborNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value58000.056000.056000.056000.056000.056000.056000.056000.056000.056000.049000.049000.049000.049000.049000.046000.039000.039000.039000.039000.039000.029000.029000.029000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.081000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value555454545555534949494538383835282987878787878786868686868686
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value555454545555534848484538383834282887868686868686868686868686
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CommonStock


Antidilutive
Period End2020-09-302019-09-30
Value300000.0237000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.540.690.520.560.470.280.520.450.430.480.520.550.510.450.250.410.430.40.30.40.350.360.370.360.110.090.080.10.090.090.070.080.080.060.050.050.050.080.050.080.070.090.090.070.07
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.530.690.520.560.470.280.520.450.430.480.510.550.510.450.250.410.430.390.30.40.350.360.360.360.110.090.080.10.090.090.070.080.080.060.050.050.050.080.050.080.070.090.090.070.07
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Tier One Risk Based Capital To Risk Weighted Assets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-12-31
Value13.1813.8413.4413.080.12730.1220.12490.12190.12430.12420.12990.1250.12440.12320.12140.12260.1360.13690.12920.1280.12590.13760.13290.1580.16180.16360.17380.16920.17340.1735
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

buse:BuseyBank


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value15.315.0614.4413.860.1330.12560.14190.13110.1370.13650.13350.13360.13140.12870.11820.1174
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets116.1108.8107.4106.0104.5103.0113.6107.5110.2109.9102.8106.9105.6104.597.490.9

buse:GsbBank


Tier
Period End2021-06-30
Value16.95
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets128.6

Capital To Risk Weighted Assets

us-gaap:CapitalToRiskWeightedAssets

us-gaap:CapitalToRiskWeightedAssets


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-12-31
Value16.4117.3917.0416.630.16230.13850.14030.13710.13960.13950.14830.14340.14420.14320.14150.14380.16180.14870.14040.13910.13650.15020.14550.17070.17460.17640.18660.18210.18630.1865
Percentage of CapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

buse:BuseyBank


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value16.2216.0615.514.890.1430.13420.14920.13930.14530.14490.14190.14220.14030.13770.12780.1286
Percentage of CapitalToRiskWeightedAssets98.892.491.089.588.196.9106.3101.6104.1103.995.799.297.396.290.391.6

buse:GsbBank


Capital
Period End2021-06-30
Value18.2
Percentage of CapitalToRiskWeightedAssets110.9

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-06-302020-03-31
Value2437000.01400000.01069000.01100000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating3.41.91.31.3

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

buse:DeferredStockUnits


Allocated
Period End2021-06-302020-06-30
Value353000.0145000.0
Percentage of AllocatedShareBasedCompensationExpense14.513.6
Percentage of InterestAndDividendIncomeOperating0.50.2
Percentage of InterestAndDividendIncomeOperating buse:DeferredStockUnits0.00.0

buse:MarketBasedPerformanceStockUnits


Allocated
Period End2021-03-31
Value1700000.0
Percentage of AllocatedShareBasedCompensationExpense121.4
Percentage of InterestAndDividendIncomeOperating2.4
Percentage of InterestAndDividendIncomeOperating buse:MarketBasedPerformanceStockUnits0.0

buse:PerformanceStockUnits


Allocated
Period End2021-03-31
Value700000.0
Percentage of AllocatedShareBasedCompensationExpense50.0
Percentage of InterestAndDividendIncomeOperating1.0
Percentage of InterestAndDividendIncomeOperating buse:PerformanceStockUnits0.0

buse:RestrictedStockUnitsAndDeferredStockUnits


Allocated
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value2200000.01100000.01100000.01200000.01000000.01000000.0900000.0800000.0800000.0700000.0600000.0500000.0
Percentage of AllocatedShareBasedCompensationExpense0.0102.9100.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating2.81.41.31.31.11.21.21.11.21.11.31.1
Percentage of InterestAndDividendIncomeOperating buse:RestrictedStockUnitsAndDeferredStockUnits0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeStockOption


Allocated
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value00000100000.0100000.00100000.0100000.0100000.0
Percentage of AllocatedShareBasedCompensationExpense0.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.10.10.00.10.10.1
Percentage of InterestAndDividendIncomeOperating us-gaap:EmployeeStockOption0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PerformanceShares


Allocated
Period End2021-06-302020-09-30
Value268000.0300000.0
Percentage of AllocatedShareBasedCompensationExpense11.00.0
Percentage of InterestAndDividendIncomeOperating0.40.4
Percentage of InterestAndDividendIncomeOperating us-gaap:PerformanceShares0.00.0

us-gaap:RestrictedStockUnitsRSU


Allocated
Period End2021-06-302020-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value1816000.0924000.0-1900000.0700000.0600000.0500000.0-1300000.0500000.0400000.0400000.0-1000000.0400000.0300000.0300000.0-800000.0300000.0300000.0200000.0-700000.0300000.0100000.0300000.0300000.0200000.0200000.0200000.0200000.0
Percentage of AllocatedShareBasedCompensationExpense74.586.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating2.51.1-2.71.11.31.1-2.71.11.01.4-3.21.31.01.1-2.91.11.10.8-2.61.10.41.11.00.70.70.60.6
Percentage of InterestAndDividendIncomeOperating us-gaap:RestrictedStockUnitsRSU0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:PlanName

buse:DirectorsAndAdvisoryDirectors, buse:DeferredStockUnits, buse:The2020EquityIncentivePlan


Allocated
Period End2021-03-242020-07-07
Value800000.0600000.0
Percentage of AllocatedShareBasedCompensationExpense0.00.0
Percentage of InterestAndDividendIncomeOperating0.00.0
Percentage of InterestAndDividendIncomeOperating buse:DirectorsAndAdvisoryDirectors buse:DeferredStockUnits buse:The2020EquityIncentivePlan0.00.0

buse:ManagementViceChairmanOfBoard, us-gaap:RestrictedStockUnitsRSU, buse:The2020EquityIncentivePlan


Allocated
Period End2021-03-242020-07-07
Value5200000.06500000.0
Percentage of AllocatedShareBasedCompensationExpense0.00.0
Percentage of InterestAndDividendIncomeOperating0.00.0
Percentage of InterestAndDividendIncomeOperating buse:ManagementViceChairmanOfBoard us-gaap:RestrictedStockUnitsRSU buse:The2020EquityIncentivePlan0.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value368.3282629293326273733312423159.0241816144.7331414146.197127.022107.7437.356108.3665.0158.5270.5365.5622.4066.5416.3017.5275.8769.323108.2743.4177.154
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating51.211.532.136.836.639.729.430.140.640.242.433.933.722.812.730.336.833.49.930.134.648.819.940.824.336.028.026.740.031.918.731.32.020.58.422.521.625.018.828.431.023.79.218.6

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value36483639321935323035343533303028252317231916
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating51.167.244.650.240.422.840.235.933.741.646.049.447.844.043.345.354.753.237.249.847.154.5

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-6.675-4.022-7.09-6.444-4.77-5.71-5.471-5.685-6.795-6.089
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-18.2-8.3-19.6-16.1-14.5-29.7-15.3-17.3-22.1-17.4
Percentage of InterestAndDividendIncomeOperating-9.3-5.6-8.7-8.1-5.9-6.8-6.2-6.2-7.4-7.2
Percentage of InterestAndDividendIncomeOperating us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, buse:BankingSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value364638413219353432363235332933292423172419
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest99.694.7105.7103.799.998.9100.3104.2104.6103.196.5100.1100.499.1109.6104.996.697.195.9102.5100.7
Percentage of InterestAndDividendIncomeOperating50.963.747.152.040.422.540.337.435.242.944.449.548.043.647.547.652.851.735.751.147.4
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:BankingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, buse:RemittanceProcessingSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0.5530.5910.640.7850.7381.1851.1931.3621.5461.4351.1411.3411.3791.3330.8640.8560.8470.9260.6110.8130.753
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest1.51.21.82.02.26.23.34.15.04.13.33.74.14.42.83.03.43.93.43.53.9
Percentage of InterestAndDividendIncomeOperating0.80.80.81.00.91.41.31.51.71.71.51.82.01.91.21.41.82.11.31.71.9
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:RemittanceProcessingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, buse:WealthManagementSegment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value6.2836.0224.3874.1654.0564.7354.1762.9513.8453.5692.4423.1943.2053.8242.472.1322.8013.1092.4920.4632.168
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest17.212.412.110.412.424.611.79.012.510.27.18.99.512.78.07.511.113.014.12.011.4
Percentage of InterestAndDividendIncomeOperating8.88.35.45.25.05.64.73.24.24.23.34.44.65.63.53.46.16.95.21.05.3
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:WealthManagementSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.862107.8769.1187.0123.8567.1468.0526.7029.5858.8919.0818.7498.278189.5618.6818.7386.278.0896.6985.6665.8685.4085.5933.8274.7634.7084.0254.0383.5283.5723.7873.2242.5562.3311.8773.7332.7534.1513.9554.1113.7221.9212.652
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating9.615.09.711.58.64.68.08.87.311.412.012.512.412.126.015.318.919.413.217.116.519.218.918.219.313.517.217.115.115.413.113.113.811.98.98.06.412.48.812.711.711.810.05.06.6

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2.8144.010.59.524.659.8650.693.056157.056.253130.0586.2864.64.15.27.63.82.643.133.7090.1231.4531.111.3432.2960.01.110.4150.560.00.070.01.850.6360.270.0
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0100.0100.00.0
Percentage of InterestAndDividendIncomeOperating3.418.74.90.610.75.110.80.84.121.710.010.028.40.113.29.710.117.624.412.89.111.113.40.45.54.25.08.40.04.11.51.90.00.20.05.61.90.80.0

Interest And Fee Income Loans And Leases

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestAndFeeIncomeLoansAndLeases


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value616271697172767878716463626064564140434336252625242423232222222323222424242526282930323435
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating85.786.588.087.787.585.985.985.285.385.286.787.488.688.890.490.889.690.491.391.189.385.285.384.485.085.586.385.684.285.885.584.884.584.784.584.183.984.886.086.186.187.489.089.288.9

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value7.1467.4388.3679.87610151618181513119.9538.8767.8016.5783.6432.9143.0043.0572.5861.5821.521.5351.5591.5931.571.61.6351.6941.8812.0032.2152.5322.9553.4663.9514.3984.7515.0846.0326.5597.6288.83210
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating10.010.310.312.412.817.819.019.919.718.918.616.514.212.911.010.57.96.56.36.56.45.44.95.25.45.65.75.86.16.57.07.48.19.310.311.913.514.615.215.517.818.820.623.027.2

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value646472697069717373686060605963554242444437272928272626252524252525242525252526272728292929
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating90.089.789.787.687.282.281.080.180.381.181.483.585.887.189.089.592.193.593.793.593.694.695.194.894.694.494.394.293.993.593.092.691.990.789.788.186.585.484.884.582.281.279.477.072.8

us-gaap:InterestIncomeExpenseNet us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-3.729-3.582-3.591-3.598-2.524-2.159-2.301-2.499-2.534-2.273
Percentage of InterestIncomeExpenseNet-5.8-5.5-4.9-5.2-3.6-3.1-3.2-3.4-3.5-3.3
Percentage of InterestAndDividendIncomeOperating-5.2-5.0-4.4-4.5-3.1-2.6-2.6-2.7-2.8-2.7
Percentage of InterestAndDividendIncomeOperating us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestIncomeExpenseNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, buse:BankingSegment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value6868767373717475757062626261645743424544382829282726
Percentage of InterestIncomeExpenseNet105.7105.5104.9105.1103.5103.1103.2103.4103.4103.3102.8103.0102.9102.8102.6102.9102.4101.3101.2101.2101.0101.0100.8100.8100.8100.8
Percentage of InterestAndDividendIncomeOperating95.294.694.192.190.384.883.682.883.083.883.786.088.389.591.392.194.394.794.894.694.695.695.995.695.495.1
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:BankingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, buse:RemittanceProcessingSegment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.0210.020.020.0210.0190.0190.020.020.0180.0180.0180.0170.0160.0160.0160.0150.0150.0140.0140.0130.0140.0140.0130.0140.0130.013
Percentage of InterestIncomeExpenseNet0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.00.00.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:RemittanceProcessingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Income Operating

us-gaap:InterestIncomeOperating us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

us-gaap:InterestIncomeOperating

buse:PaycheckProtectionProgram


Interest
Period End2020-09-302020-06-30
Value4200000.03000000.0
Percentage of InterestIncomeOperating100.0100.0
Percentage of InterestAndDividendIncomeOperating5.33.7
Percentage of InterestAndDividendIncomeOperating buse:PaycheckProtectionProgram0.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value9.8041.7671116111419181814139.4539.8877.3257.8575.3233.1543.0083.0162.4532.6141.5911.5311.5541.5621.6351.591.6391.6661.771.952.082.3592.6973.1153.6514.0834.6744.775.5246.2527.4077.9910
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating13.72.414.320.414.017.021.819.719.917.718.813.014.110.711.18.56.96.76.35.26.45.44.95.25.45.85.76.06.26.77.37.68.69.910.912.614.015.515.316.818.521.221.628.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2937283025152824242525262421121816151115121010109.9367.7617.5939.1098.1857.8876.927.9337.446.4334.9174.9094.8887.6435.7467.577.4479.117.3066.022
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.552.334.938.731.818.232.227.126.330.234.036.935.431.917.430.035.833.824.032.730.535.334.335.734.427.527.533.130.730.025.729.127.123.717.216.916.725.418.423.122.026.119.715.7

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-4.757-2.823-3.968-4.659-3.789-4.019-5.424-4.059-4.306-4.862
Percentage of NetIncomeLoss-16.0-7.5-14.0-15.1-14.7-26.2-19.0-16.3-17.9-19.1
Percentage of InterestAndDividendIncomeOperating-6.6-3.9-4.9-5.9-4.7-4.8-6.1-4.4-4.7-5.8
Percentage of InterestAndDividendIncomeOperating us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, buse:BankingSegment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2935283125142925242624262421161815141015129.703109.7339.146.645
Percentage of NetIncomeLoss98.293.9100.8103.0100.797.1103.5103.6101.5104.795.498.6100.299.7131.4100.896.297.295.8101.1100.393.098.491.692.085.6
Percentage of InterestAndDividendIncomeOperating40.849.135.139.932.017.733.328.126.731.632.536.435.431.822.830.334.532.823.033.030.632.933.832.731.623.5
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:BankingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, buse:RemittanceProcessingSegment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.4010.4290.4060.5780.5280.860.9580.9721.1051.0250.8140.9570.9860.9530.440.5050.5080.5540.3640.4860.4510.4570.380.4790.4920.358
Percentage of NetIncomeLoss1.31.11.41.92.05.63.43.94.64.03.23.64.04.33.62.73.13.73.23.23.64.43.64.55.04.6
Percentage of InterestAndDividendIncomeOperating0.60.60.50.70.61.01.11.11.21.21.11.31.41.40.60.81.11.20.81.01.11.51.21.61.71.3
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:RemittanceProcessingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, buse:WealthManagementSegment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4.8844.6823.3343.1663.0823.5993.4652.1842.8452.6412.042.282.2882.7641.4691.2371.6751.8481.4860.2841.2961.3221.1310.8941.1011.595
Percentage of NetIncomeLoss16.412.411.810.311.923.412.18.811.810.48.18.59.212.611.96.610.212.213.01.810.512.710.68.411.120.6
Percentage of InterestAndDividendIncomeOperating6.86.54.14.03.84.33.92.43.13.12.73.13.34.02.12.03.64.13.10.63.24.53.63.03.85.6
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:WealthManagementSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value2937283025152824242525262421121816151115121010109.9367.7617.5939.1098.1857.8876.927.9337.446.4334.917
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.552.334.938.731.818.232.227.126.330.234.036.935.431.917.430.035.833.824.032.730.535.334.335.734.427.527.533.130.730.025.729.127.123.717.2
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2937283025152824242525262421121816151115121010109.7557.5797.4118.9278.0047.7056.0127.0246.5325.5254.0094.03.986.7354.5126.5216.1647.3345.9844.7394.402
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.552.334.938.731.818.232.227.126.330.234.036.935.431.917.430.035.833.824.032.730.535.333.835.133.726.826.832.430.029.422.425.823.820.414.013.813.622.414.419.918.221.016.212.311.0

Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value137000.0609000.0207000.0206000.0-149000.0-2248000.0392000.0-592000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.20.80.30.3-0.2-2.70.4-0.6

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302011-06-302010-06-30
Value29372830251528242425252624211218161511157.4475.685
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.552.334.938.731.818.232.227.126.330.234.036.935.431.917.430.035.833.824.032.722.014.2

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

buse:RemittanceProcessing


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value4.3494.4183.7183.753
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating6.16.14.64.4
Percentage of InterestAndDividendIncomeOperating buse:RemittanceProcessing0.00.00.00.0

us-gaap:AssetManagement1


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value13121011
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax299.0284.8274.2307.9
Percentage of InterestAndDividendIncomeOperating18.117.412.513.7
Percentage of InterestAndDividendIncomeOperating us-gaap:AssetManagement10.00.00.00.0

us-gaap:Banking


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8.6118.0378.2048.0147.0258.3619.0489.8429.6968.0977.3037.347.29
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax198.0181.90.00.0188.9222.80.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating12.011.110.110.18.69.910.210.710.69.69.810.110.4
Percentage of InterestAndDividendIncomeOperating us-gaap:Banking0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DepositAccount


Revenue
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3.9953.7183.7533.7653.783.7173.783.7573.633.566
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0100.0100.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating5.04.64.44.24.14.14.55.15.05.1
Percentage of InterestAndDividendIncomeOperating us-gaap:DepositAccount0.00.00.00.00.00.00.00.00.00.0

us-gaap:InvestmentAdvice


Revenue
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value101011118.8219.4889.029
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0274.2307.90.00.00.00.0
Percentage of InterestAndDividendIncomeOperating13.212.513.712.69.610.410.7
Percentage of InterestAndDividendIncomeOperating us-gaap:InvestmentAdvice0.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value12415107591054410539108359721969597539612953777027889777577787860691355315438542555925510389039983863388539373665352035073542353935323511364836183529352435363402339234703605
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value157614531173
Percentage of Assets14.915.015.2
Percentage of Assets14.915.015.2
Percentage of Assets srt:ParentCompany100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value3.281-11.996-11.683-6.568-15.686-13.714-13.608-14.622
Percentage of Assets0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.2
Percentage of Assets0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.2
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, buse:BankingSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value12301106741046210457107659654963297049568949976567831771977227809685354755386536955575468383739443589
Percentage of Assets99.199.299.299.299.499.399.399.599.599.699.499.399.399.399.499.199.099.099.099.499.298.698.697.9
Percentage of Assets99.199.299.299.299.499.399.399.599.599.699.499.399.399.399.499.199.099.099.099.499.298.698.697.9
Percentage of Assets us-gaap:OperatingSegments buse:BankingSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, buse:RemittanceProcessingSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value464646464544444342413937363534333332323131303028
Percentage of Assets0.40.40.40.40.40.50.50.40.40.40.50.50.50.50.40.50.60.60.60.60.60.80.80.8
Percentage of Assets0.40.40.40.40.40.50.50.40.40.40.50.50.50.50.40.50.60.60.60.60.60.80.80.8
Percentage of Assets us-gaap:OperatingSegments buse:RemittanceProcessingSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, buse:WealthManagementSegment


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value635046424036322826222033323132292928282727272731
Percentage of Assets0.50.50.40.40.40.40.30.30.30.20.30.40.40.40.40.40.50.50.50.50.50.70.70.9
Percentage of Assets0.50.50.40.40.40.40.30.30.30.20.30.40.40.40.40.40.50.50.50.50.50.70.70.9
Percentage of Assets us-gaap:OperatingSegments buse:WealthManagementSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1106994939273928395998503847585378409835167076917681868366925607749184836483049964922350736253419344234973231309030803121312431173101323432093112310931242992298530413184
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets89.288.288.088.188.687.587.487.587.587.687.187.787.787.988.187.988.988.989.089.389.390.190.788.588.688.888.287.887.888.188.388.388.388.788.788.288.288.388.088.087.688.3

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-31
Value306233178
Percentage of Liabilities3.32.82.7
Percentage of Assets2.92.42.3
Percentage of Assets srt:ParentCompany19.416.015.2

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value12415107591054410539108359721969597539612953777027889777577787860691355315438542555925510389039983863388539373665352035073542353935323511364836183529352435363402339234703605
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-31
Value157614531173
Percentage of LiabilitiesAndStockholdersEquity14.915.015.2
Percentage of Assets14.915.015.2
Percentage of Assets srt:ParentCompany100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value1345126512701255123612171220121512031186994972957942935836613602594596588383373444442439433430426420415414410413408417414412409407429420328454
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.811.812.011.911.412.512.612.512.512.412.912.312.312.111.912.111.111.111.010.710.79.99.311.511.411.211.812.212.211.911.711.711.711.311.311.811.811.712.012.012.411.70.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-31
Value12701220994
Percentage of StockholdersEquity100.0100.0100.0
Percentage of Assets12.012.612.9
Percentage of Assets srt:ParentCompany80.684.084.8

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-1.438-1.575-2.184-2.391-2.597-2.448-0.2-0.592
Percentage of StockholdersEquity-0.1-0.1-0.2-0.2-0.2-0.2-0.0-0.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value125.396353739351517141.595-6.812-13.024-10.865-2.810.036
Percentage of StockholdersEquity0.90.42.83.03.22.91.21.51.20.1-0.7-1.3-1.1-0.30.0
Percentage of Assets0.10.10.30.40.40.40.20.20.20.0-0.1-0.2-0.1-0.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value103.821333537331417141.595-6.812-13.024-10.865-9.674-2.810.4590.305-0.1350.0366.7587.9716.3172.346.8265.3198.2335.8175.6677.424.9354.4566.3615.767121316139.0328.8129.837
Percentage of StockholdersEquity0.80.32.62.83.02.71.21.41.20.1-0.7-1.3-1.1-1.0-0.30.10.0-0.00.01.11.41.60.61.51.21.91.31.31.71.21.11.51.43.13.33.83.22.12.72.2
Percentage of Assets0.10.00.30.30.30.30.20.20.20.0-0.1-0.2-0.1-0.1-0.00.00.0-0.00.00.10.10.20.10.20.10.20.20.20.20.10.10.20.20.30.40.50.40.30.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value131612551253125012481249124812471246124710801079108210841084988780780781783785591591590593593593593593593593593594594594594594562510393
Percentage of StockholdersEquity97.899.198.799.6101.0102.6102.3102.6103.5105.2108.6111.0113.1115.1116.0118.3127.4129.6131.5131.4133.6154.2158.4133.0134.2135.0136.9138.0139.0141.1142.8143.2145.0143.7145.4142.4145.1133.7155.586.4
Percentage of Assets10.611.711.911.911.512.912.912.813.013.114.013.713.913.913.814.314.114.314.414.014.315.214.815.315.315.116.216.916.916.716.816.816.916.316.416.817.515.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value0.0580.0560.0560.0560.0560.0560.0560.0560.0560.0560.0490.0490.0490.0490.0490.0460.0390.0390.0390.0390.0390.0290.0290.0290.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0810.0680.038
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value6245204.718-13.951-27.599-14.813-31.868-44.878-57.125-72.167-87.532-104.504-119.467-132.122-135.552-145.996-155.507-163.689-168.552-177.372-184.792-190.265-195.832-201.851-207.213-210.384-213.386-217.906-221.524-225.722-228.222-231.747-234.796-240.321-233.838-238.085-249.418-256.97685
Percentage of StockholdersEquity4.73.61.60.4-1.1-2.3-1.2-2.6-3.7-4.8-7.3-9.0-10.9-12.7-14.1-16.2-23.8-25.8-27.5-28.3-30.2-48.2-51.0-44.1-45.6-47.1-48.5-49.6-51.1-52.7-54.3-55.1-56.5-56.8-58.8-56.0-58.2-59.3-78.318.9
Percentage of Assets0.50.40.20.0-0.1-0.3-0.2-0.3-0.5-0.6-0.9-1.1-1.3-1.5-1.7-2.0-2.6-2.9-3.0-3.0-3.2-4.7-4.8-5.1-5.2-5.3-5.7-6.1-6.2-6.3-6.4-6.5-6.6-6.4-6.6-6.6-7.0-6.90.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value-44.734-38.996-37.486-34.985-35.103-37.274-27.985-17.158-12.357-5.725-6.19-6.464-9.821-13.173-15.003-17.857-22.149-22.477-23.788-25.58-28.346-29.366-29.971-30.107-27.421-27.581-28.233-28.525-28.778-28.993-29.266-29.97-31.116-31.235-31.587-31.699-32.116-32.183-32.183-32.205
Percentage of StockholdersEquity-3.3-3.1-3.0-2.8-2.8-3.1-2.3-1.4-1.0-0.5-0.6-0.7-1.0-1.4-1.6-2.1-3.6-3.7-4.0-4.3-4.8-7.7-8.0-6.8-6.2-6.3-6.5-6.6-6.7-6.9-7.0-7.2-7.6-7.6-7.7-7.6-7.8-7.7-9.8-7.1
Percentage of Assets-0.4-0.4-0.4-0.3-0.3-0.4-0.3-0.2-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.3-0.4-0.4-0.4-0.5-0.5-0.8-0.7-0.8-0.7-0.7-0.8-0.8-0.8-0.8-0.8-0.8-0.9-0.9-0.9-0.9-0.9-0.90.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Tier One Risk Based Capital

us-gaap:TierOneRiskBasedCapital

us-gaap:TierOneRiskBasedCapital


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-12-31
Value10621007983964941921922907904898783764746729718674576565557551538400394459461455455417390379
Percentage of TierOneRiskBasedCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.69.49.39.28.79.59.59.39.49.410.29.79.69.49.19.810.410.410.39.99.810.39.911.911.911.612.411.810.811.2

us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities

buse:BuseyBank


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value11331094105310199829471045830842831803812784757651502
Percentage of TierOneRiskBasedCapital106.7108.6107.2105.7104.3102.8113.491.693.192.6102.5106.3105.1103.990.790.1
Percentage of Assets9.110.210.09.79.19.710.88.58.88.710.410.310.19.78.39.3
Percentage of Assets buse:BuseyBank0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

buse:GsbBank


Tier
Period End2021-06-30
Value105
Percentage of TierOneRiskBasedCapital9.9
Percentage of Assets0.8
Percentage of Assets buse:GsbBank0.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value9204046884791050342529525420330239160230367353214294439166319
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.43.86.54.69.73.55.55.44.43.53.12.03.04.74.53.15.38.13.18.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value12914725427
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents18.82.830.015.616.5
Percentage of Assets1.20.20.90.70.5
Percentage of Assets srt:ParentCompany8.21.06.10.00.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value225232192183137120116117129124
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.12.42.52.32.53.03.23.33.63.6

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

buse:FurnitureAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value53544842373432334138
Percentage of PropertyPlantAndEquipmentGross23.923.324.923.127.328.327.528.732.230.9
Percentage of Assets0.50.60.60.50.70.90.90.91.21.1
Percentage of Assets buse:FurnitureAndEquipment0.00.00.00.00.00.00.00.00.00.0

us-gaap:BuildingAndBuildingImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value130134108104736462626562
Percentage of PropertyPlantAndEquipmentGross58.057.856.157.153.453.454.053.050.350.4
Percentage of Assets1.21.41.41.31.41.61.71.81.81.8
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.00.00.00.0

us-gaap:LandAndLandImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value40433636262121212223
Percentage of PropertyPlantAndEquipmentGross18.118.918.919.819.318.318.518.417.618.7
Percentage of Assets0.40.50.50.50.50.50.60.60.60.7
Percentage of Assets us-gaap:LandAndLandImprovements0.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value89817466595752515854
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.81.00.81.11.41.41.51.61.6

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.652.4012.4392.4932.5192.5572.6812.362.4122.0941.4041.4451.491.5151.571.2861.1821.2071.2811.2821.1090.7660.8080.8070.8080.7690.7030.7010.7330.7470.7830.7830.7830.7830.8340.8270.8270.8270.8850.8850.8840.8841.0211.0221.022
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1451321351441461491511531491471171191191181161007977778081626363646463646465656769707172706969707173
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.21.31.41.41.51.61.61.61.61.51.51.51.51.51.51.41.41.41.41.51.61.61.71.71.71.71.81.81.81.91.92.01.92.02.02.02.02.02.12.12.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities

srt:ParentCompany


Property
Period End2020-12-312019-12-312018-12-31
Value0.0510.0680.067
Percentage of PropertyPlantAndEquipmentNet0.00.00.1
Percentage of Assets0.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value317311311311311311311322314314267267267267269218102102102102102252525252520202020202020202020202020202020
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.62.93.03.02.93.23.23.33.33.33.53.43.43.43.43.21.91.91.91.81.90.70.60.70.70.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.60.6

us-gaap:Goodwill us-gaap:BusinessAcquisition

buse:CumminsAmericanCorp


Goodwillus-gaap:
Period End2021-06-302021-05-31
Value6.05.985
Percentage of Goodwill1.90.0
Percentage of Assets0.00.0
Percentage of Assets buse:CumminsAmericanCorp0.00.0

us-gaap:Goodwill us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, buse:BankingSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value29428828828828828828829329329324624624624624819882828281814.8244.824
Percentage of Goodwill92.792.692.692.692.692.692.690.993.493.492.392.392.392.392.390.579.979.979.979.879.818.918.9
Percentage of Assets2.42.72.72.72.73.03.03.03.13.13.23.13.23.23.22.91.51.51.51.51.50.10.1
Percentage of Assets us-gaap:OperatingSegments buse:BankingSegment2.42.72.82.82.73.03.03.03.13.13.23.23.23.23.22.91.51.51.51.51.50.10.1

us-gaap:OperatingSegments, buse:WealthManagementSegment


Goodwillus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value141414141414142011111111111111111111111111111111
Percentage of Goodwill4.44.54.54.54.54.54.56.33.73.74.44.44.44.44.35.311.411.411.411.411.445.845.856.5
Percentage of Assets0.10.10.10.10.10.10.10.20.10.10.20.10.20.20.10.20.20.20.20.20.20.30.30.3
Percentage of Assets us-gaap:OperatingSegments buse:WealthManagementSegment22.228.030.333.135.039.043.170.945.051.155.734.936.437.536.539.339.440.941.243.242.242.242.337.4

us-gaap:Goodwill us-gaap:StatementBusinessSegments

buse:BankingSegment


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value288288246248824.824
Percentage of Goodwill92.692.692.392.379.918.9
Percentage of Assets2.73.03.23.21.50.1
Percentage of Assets buse:BankingSegment0.00.00.00.00.00.0

buse:WealthManagementSegment


Goodwillus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value14141111111111
Percentage of Goodwill4.54.54.44.311.445.856.5
Percentage of Assets0.10.10.20.10.20.30.3
Percentage of Assets buse:WealthManagementSegment0.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value6449515456596158606332343537382816171819216.6677.4328.249.0489.8566.6877.398.0928.8249.5711011111213141516161719
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.50.50.50.50.60.60.60.60.70.40.40.50.50.50.40.30.30.30.40.40.20.20.20.20.30.20.20.20.20.30.30.30.30.40.40.40.40.50.50.50.5

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value51613238187.4326.6879.5711216
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.60.40.50.30.20.20.30.40.5

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CoreDeposits


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value43513137175.2314.2546.1248.17410
Percentage of FiniteLivedIntangibleAssetsNet83.483.096.896.593.970.463.664.064.364.8
Percentage of Assets0.40.50.40.50.30.10.10.20.20.3
Percentage of Assets us-gaap:CoreDeposits0.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value8.638101.0371.3561.1242.2012.4333.4474.5295.645
Percentage of FiniteLivedIntangibleAssetsNet16.617.03.23.56.129.636.436.035.735.2
Percentage of Assets0.10.10.00.00.00.10.10.10.10.2
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.0

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value3.5691117202122353948
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.20.40.50.61.01.11.4

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.2287.3337.7147.2518.5119.0749.499.9791010
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.1

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value137.1465.53175.1264.9365.9525.695.3626.169
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.20.00.10.10.10.10.1

us-gaap:EquitySecuritiesFvNi us-gaap:ConsolidatedEntities

srt:ParentCompany


Equity
Period End2020-12-312019-12-312018-12-31
Value5.535.9236.162
Percentage of EquitySecuritiesFvNi100.099.599.9
Percentage of Assets0.10.10.1
Percentage of Assets srt:ParentCompany0.40.40.5

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2020-09-302018-12-31
Value136.169
Percentage of EquitySecuritiesFvNi73.7100.0
Percentage of Assets0.10.1
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring0.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value137.1465.534.6895.1264.9365.9525.695.362
Percentage of EquitySecuritiesFvNi100.0100.0100.026.3100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.00.00.10.10.10.1
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value137.1465.53175.1264.9365.9525.695.3626.169
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.20.00.10.10.10.10.1
Percentage of Assets us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value19614815015814415210210294724862564955614537647771454442414141464443434443525357586161656269
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.41.41.51.31.61.11.01.00.80.60.80.70.60.70.90.80.71.21.41.31.21.11.11.11.11.11.31.31.21.21.21.21.41.51.61.71.71.81.91.81.9

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-31
Value21136.782
Percentage of OtherAssets14.413.514.1
Percentage of Assets0.20.10.1
Percentage of Assets srt:ParentCompany1.41.00.6

Time Deposit Maturities Year One

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:TimeDepositMaturitiesYearOne


Time
Period End2020-12-31
Value775
Percentage of TimeDepositMaturitiesYearOne100.0
Percentage of Assets7.4

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1724000.01409000.01555000.01288000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1289000.0974000.01358000.01129000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1050000.0840000.0957000.0894000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value840000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-312020-09-30
Value1792000.02647000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0
Percentage of Assets0.00.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.287.387.7577.3428.6019.159.552101010
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.1

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value8280000.07380000.07757000.07342000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value1345126512701255123612171220121512031186994972957942935836613602594596588383373444442439433430426420415414410413408417414412409407429420328454
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.811.812.011.911.412.512.612.512.512.412.912.312.312.111.912.111.111.111.010.710.79.99.311.511.411.211.812.212.211.911.711.711.711.311.311.811.811.712.012.012.411.70.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-31
Value12701220994
Percentage of StockholdersEquity100.0100.0100.0
Percentage of Assets12.012.612.9
Percentage of Assets srt:ParentCompany80.684.084.8

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-1.438-1.575-2.184-2.391-2.597-2.448-0.2-0.592
Percentage of StockholdersEquity-0.1-0.1-0.2-0.2-0.2-0.2-0.0-0.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value125.396353739351517141.595-6.812-13.024-10.865-2.810.036
Percentage of StockholdersEquity0.90.42.83.03.22.91.21.51.20.1-0.7-1.3-1.1-0.30.0
Percentage of Assets0.10.10.30.40.40.40.20.20.20.0-0.1-0.2-0.1-0.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value103.821333537331417141.595-6.812-13.024-10.865-9.674-2.810.4590.305-0.1350.0366.7587.9716.3172.346.8265.3198.2335.8175.6677.424.9354.4566.3615.767121316139.0328.8129.837
Percentage of StockholdersEquity0.80.32.62.83.02.71.21.41.20.1-0.7-1.3-1.1-1.0-0.30.10.0-0.00.01.11.41.60.61.51.21.91.31.31.71.21.11.51.43.13.33.83.22.12.72.2
Percentage of Assets0.10.00.30.30.30.30.20.20.20.0-0.1-0.2-0.1-0.1-0.00.00.0-0.00.00.10.10.20.10.20.10.20.20.20.20.10.10.20.20.30.40.50.40.30.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value131612551253125012481249124812471246124710801079108210841084988780780781783785591591590593593593593593593593593594594594594594562510393
Percentage of StockholdersEquity97.899.198.799.6101.0102.6102.3102.6103.5105.2108.6111.0113.1115.1116.0118.3127.4129.6131.5131.4133.6154.2158.4133.0134.2135.0136.9138.0139.0141.1142.8143.2145.0143.7145.4142.4145.1133.7155.586.4
Percentage of Assets10.611.711.911.911.512.912.912.813.013.114.013.713.913.913.814.314.114.314.414.014.315.214.815.315.315.116.216.916.916.716.816.816.916.316.416.817.515.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value0.0580.0560.0560.0560.0560.0560.0560.0560.0560.0560.0490.0490.0490.0490.0490.0460.0390.0390.0390.0390.0390.0290.0290.0290.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0880.0810.0680.038
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value6245204.718-13.951-27.599-14.813-31.868-44.878-57.125-72.167-87.532-104.504-119.467-132.122-135.552-145.996-155.507-163.689-168.552-177.372-184.792-190.265-195.832-201.851-207.213-210.384-213.386-217.906-221.524-225.722-228.222-231.747-234.796-240.321-233.838-238.085-249.418-256.97685
Percentage of StockholdersEquity4.73.61.60.4-1.1-2.3-1.2-2.6-3.7-4.8-7.3-9.0-10.9-12.7-14.1-16.2-23.8-25.8-27.5-28.3-30.2-48.2-51.0-44.1-45.6-47.1-48.5-49.6-51.1-52.7-54.3-55.1-56.5-56.8-58.8-56.0-58.2-59.3-78.318.9
Percentage of Assets0.50.40.20.0-0.1-0.3-0.2-0.3-0.5-0.6-0.9-1.1-1.3-1.5-1.7-2.0-2.6-2.9-3.0-3.0-3.2-4.7-4.8-5.1-5.2-5.3-5.7-6.1-6.2-6.3-6.4-6.5-6.6-6.4-6.6-6.6-7.0-6.90.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312009-12-312008-12-31
Value-44.734-38.996-37.486-34.985-35.103-37.274-27.985-17.158-12.357-5.725-6.19-6.464-9.821-13.173-15.003-17.857-22.149-22.477-23.788-25.58-28.346-29.366-29.971-30.107-27.421-27.581-28.233-28.525-28.778-28.993-29.266-29.97-31.116-31.235-31.587-31.699-32.116-32.183-32.183-32.205
Percentage of StockholdersEquity-3.3-3.1-3.0-2.8-2.8-3.1-2.3-1.4-1.0-0.5-0.6-0.7-1.0-1.4-1.6-2.1-3.6-3.7-4.0-4.3-4.8-7.7-8.0-6.8-6.2-6.3-6.5-6.6-6.7-6.9-7.0-7.2-7.6-7.6-7.7-7.6-7.8-7.7-9.8-7.1
Percentage of Assets-0.4-0.4-0.4-0.3-0.3-0.4-0.3-0.2-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.3-0.4-0.4-0.4-0.5-0.5-0.8-0.7-0.8-0.7-0.7-0.8-0.8-0.8-0.8-0.8-0.8-0.9-0.9-0.9-0.9-0.9-0.90.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value58000.056000.056000.056000.056000.056000.056000.056000.056000.056000.049000.049000.049000.049000.049000.046000.039000.039000.039000.039000.039000.029000.029000.029000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.088000.081000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value131612551253125012481249124812471246124710801079108210841084988780780781783785591591590593593593593593593593593594594594594594594594594594562
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.611.711.911.911.512.912.912.813.013.114.013.713.913.913.814.314.114.314.414.014.315.214.815.315.315.116.216.916.916.716.816.816.916.316.416.816.916.817.517.517.115.6

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value6245204.718-13.951-27.599-14.813-31.868-44.878-57.125-72.167-87.532-104.504-119.467-132.122-135.552-145.996-155.507-163.689-168.552-177.372-184.792-190.265-195.832-201.851-207.213-210.384-213.386-217.906-221.524-225.722-228.222-231.747-234.796-240.321-233.838-234.343-234.836-238.085-239.441-242.499-249.418
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.40.20.0-0.1-0.3-0.2-0.3-0.5-0.6-0.9-1.1-1.3-1.5-1.7-2.0-2.6-2.9-3.0-3.0-3.2-4.7-4.8-5.1-5.2-5.3-5.7-6.1-6.2-6.3-6.4-6.5-6.6-6.4-6.6-6.6-6.6-6.6-7.0-7.1-7.0-6.9

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value103.821333537331417141.595-6.812-13.024-10.865-9.674-2.810.4590.305-0.1350.0366.7587.9716.3172.346.8265.3198.2335.8175.6677.424.9354.4566.3615.76712131614131312119.032
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.30.30.30.30.20.20.20.0-0.1-0.2-0.1-0.1-0.00.00.0-0.00.00.10.10.20.10.20.10.20.20.20.20.10.10.20.20.30.40.50.40.40.40.40.30.3

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4438373435372717125.7256.196.4649.8211315172222232528292930272728282828292931313131313232323232
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.30.30.40.30.20.10.10.10.10.10.20.20.30.40.40.40.50.50.80.70.80.70.70.80.80.80.80.80.80.90.90.90.90.90.90.90.90.90.9

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value36456746351828141.09536553518937444-51.431861026
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating51.263.083.558.644.222.332.116.31.243.074.648.626.2136.0104.570.7-111.8415.322.555.7

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value304-545.848146-295.261-405.472-181.228450.1767-48.398250-186.698-133.25414-205.116-12.879-159.78883-40.8782.772
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating424.9-754.7179.9-370.8-499.1-214.651.00.274.2-57.4336.5-256.6-189.521.2-289.5-20.6-347.3186.8-85.85.9

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value174216-5.366-321.7741076-24.025-69.9459020102-226.14581-21.991-93.607270-111.054652.302-163.96964
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating243.6299.4-6.6-404.11325.5-28.5-78.898.322.8121.7-304.3111.7-31.3-136.4381.1-177.6143.05.1-344.2137.1

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value516-283.735208-570.351707-186.443.831105899079-70.078-136.79514138-79.719-145.411272
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating719.8-392.3256.8-716.3870.6-220.84.3114.898.2107.3106.7-96.3-194.520.8196.0-127.5-316.0607.2

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value36456746351828141.09536553518937444-51.431861026
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating51.263.083.558.644.222.332.116.31.243.074.648.626.2136.0104.570.7-111.8415.322.555.7

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2937283025152824242525262421121816151115121010109.9367.7617.5939.1098.1857.8876.927.9337.446.4334.9174.9094.8887.6435.7467.577.4479.117.3066.022
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.552.334.938.731.818.232.227.126.330.234.036.935.431.917.430.035.833.824.032.730.535.334.335.734.427.527.533.130.730.025.729.127.123.717.216.916.725.418.423.122.026.119.715.7

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-4.757-2.823-3.968-4.659-3.789-4.019-5.424-4.059-4.306-4.862
Percentage of NetIncomeLoss-16.0-7.5-14.0-15.1-14.7-26.2-19.0-16.3-17.9-19.1
Percentage of InterestAndDividendIncomeOperating-6.6-3.9-4.9-5.9-4.7-4.8-6.1-4.4-4.7-5.8
Percentage of InterestAndDividendIncomeOperating us-gaap:IntersegmentElimination0.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, buse:BankingSegment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2935283125142925242624262421161815141015129.703109.7339.146.645
Percentage of NetIncomeLoss98.293.9100.8103.0100.797.1103.5103.6101.5104.795.498.6100.299.7131.4100.896.297.295.8101.1100.393.098.491.692.085.6
Percentage of InterestAndDividendIncomeOperating40.849.135.139.932.017.733.328.126.731.632.536.435.431.822.830.334.532.823.033.030.632.933.832.731.623.5
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:BankingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, buse:RemittanceProcessingSegment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.4010.4290.4060.5780.5280.860.9580.9721.1051.0250.8140.9570.9860.9530.440.5050.5080.5540.3640.4860.4510.4570.380.4790.4920.358
Percentage of NetIncomeLoss1.31.11.41.92.05.63.43.94.64.03.23.64.04.33.62.73.13.73.23.23.64.43.64.55.04.6
Percentage of InterestAndDividendIncomeOperating0.60.60.50.70.61.01.11.11.21.21.11.31.41.40.60.81.11.20.81.01.11.51.21.61.71.3
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:RemittanceProcessingSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, buse:WealthManagementSegment


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4.8844.6823.3343.1663.0823.5993.4652.1842.8452.6412.042.282.2882.7641.4691.2371.6751.8481.4860.2841.2961.3221.1310.8941.1011.595
Percentage of NetIncomeLoss16.412.411.810.311.923.412.18.811.810.48.18.59.212.611.96.610.212.213.01.810.512.710.68.411.120.6
Percentage of InterestAndDividendIncomeOperating6.86.54.14.03.84.33.92.43.13.12.73.13.34.02.12.03.64.13.10.63.24.53.63.03.85.6
Percentage of InterestAndDividendIncomeOperating us-gaap:OperatingSegments buse:WealthManagementSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value2937283025152824242525262421121816151115121010109.9367.7617.5939.1098.1857.8876.927.9337.446.4334.917
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.552.334.938.731.818.232.227.126.330.234.036.935.431.917.430.035.833.824.032.730.535.334.335.734.427.527.533.130.730.025.729.127.123.717.2
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302011-06-302010-06-30
Value29372830251528242425252624211218161511157.4475.685
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.552.334.938.731.818.232.227.126.330.234.036.935.431.917.430.035.833.824.032.722.014.2

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2437000.01448000.02722000.02205000.01069000.01139000.0761000.01205000.01017000.01014000.01055000.0944000.0874000.0848000.0817000.0802000.0588000.0545000.0494000.0517000.0403000.0389000.0417000.0409000.0251000.0341000.0352000.0356000.0255000.0224000.0429000.0255000.0144000.0251000.0269000.0273000.0229000.0220000.0179000.0166000.075000.068000.068000.068000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value304-545.848146-295.261-405.472-181.228450.1767-48.398250-186.698-133.25414-205.116-12.879-159.78883-40.8782.772
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating424.9-754.7179.9-370.8-499.1-214.651.00.274.2-57.4336.5-256.6-189.521.2-289.5-20.6-347.3186.8-85.85.9

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1.1821.9111.040.1290.7152.3142.4924.8284.8661.0521.1821.8424.0864.5083.6445.2823.9592.0952.2432.0663.4471.2350.8490.9341.2691.0620.9861.2440.9520.5960.270.5690.7730.9371.6923.5092.0451.3650.680.3830.9690.7160.3140.722
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value174216-5.366-321.7741076-24.025-69.9459020102-226.14581-21.991-93.607270-111.054652.302-163.96964
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating243.6299.4-6.6-404.11325.5-28.5-78.898.322.8121.7-304.3111.7-31.3-136.4381.1-177.6143.05.1-344.2137.1

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value121211111112111111109.7729.7569.7439.7398.7368.2076.8856.8796.4856.5044.884.8795.0334.5364.5274.5234.5254.5234.5223.6544.3784.384.3740.908114.3754.3724.3733.8454.8744.7134.9113.9043.904
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value5.7381.512.6030.0-0.0039.672104.89
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.00.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:CreditFacility, us-gaap:VariableRate

us-gaap:DebtInstrumentInterestRateStatedPercentage

buse:SecondAmendmentToRevolvingCreditFacility, buse:OneMonthLondonInterbankOfferedRateLibor


Debt
Period End2021-05-28
Value1.75
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations buse:SecondAmendmentToRevolvingCreditFacility buse:OneMonthLondonInterbankOfferedRateLibor0.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value23.5323.5323.5323.5323.5321.8722.021.9921.7621.3920.5816.9715.1343.6448.99
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:AccretionOfPremiumsAndDiscountsOnTimeDeposits

buse:AccretionOfPremiumsAndDiscountsOnTimeDeposits


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value304000.0246000.0271000.0-47000.0335000.0374000.0412000.0434000.0469000.0333000.0
Percentage of AccretionOfPremiumsAndDiscountsOnTimeDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:AmortizationOfDiscountOnFederalHomeLoanBankAdvances

buse:AmortizationOfDiscountOnFederalHomeLoanBankAdvances


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value202000.0214000.0199000.0167000.0127000.093000.093000.091000.091000.034000.037000.037000.0
Percentage of AmortizationOfDiscountOnFederalHomeLoanBankAdvances100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:BusinessCombinationConsiderationTransferredPerShareInCash us-gaap:BusinessAcquisition

buse:BusinessCombinationConsiderationTransferredPerShareInCash

buse:CumminsAmericanCorp


Business
Period End2021-05-312021-01-19
Value14174.027970.0
Percentage of BusinessCombinationConsiderationTransferredPerShareInCash100.0100.0

buse:BusinessCombinationConsiderationTransferredPerShareInCash us-gaap:StatementScenario, us-gaap:BusinessAcquisition

srt:ScenarioForecast, buse:CumminsAmericanCorp


Business
Period End2021-01-19
Value27970.0
Percentage of BusinessCombinationConsiderationTransferredPerShareInCash100.0

buse:BusinessCombinationSharesReceived us-gaap:StatementScenario, us-gaap:BusinessAcquisition

buse:BusinessCombinationSharesReceived

srt:ScenarioForecast, buse:CumminsAmericanCorp


Business
Period End2021-01-19
Value444.48
Percentage of BusinessCombinationSharesReceived100.0

buse:BusinessCombinationSpecialCashDividend dei:LegalEntity

buse:BusinessCombinationSpecialCashDividend

buse:CumminsAmericanCorp


Business
Period End2021-01-19
Value60
Percentage of BusinessCombinationSpecialCashDividend100.0

buse:Gsb


Business
Period End2021-01-19
Value60
Percentage of BusinessCombinationSpecialCashDividend100.0

buse:BusinessCombinationSpecialCashDividend dei:LegalEntity, us-gaap:StatementScenario

buse:CumminsAmericanCorp, srt:ScenarioForecast


Business
Period End2021-01-19
Value60
Percentage of BusinessCombinationSpecialCashDividend100.0

buse:Gsb, srt:ScenarioForecast


Business
Period End2021-01-19
Value60
Percentage of BusinessCombinationSpecialCashDividend100.0

buse:BusinessCombinationSpecialCashDividend us-gaap:BusinessAcquisition

buse:CumminsAmericanCorp


Business
Period End2021-05-28
Value60
Percentage of BusinessCombinationSpecialCashDividend0.0

buse:CollateralDependentLoans

buse:CollateralDependentLoans


Collateral
Period End2021-06-302021-03-312020-12-31
Value1.915-2.7
Percentage of CollateralDependentLoans100.0100.0100.0

buse:CommercialAndMortgageTransferToRealEstate

buse:CommercialAndMortgageTransferToRealEstate


Commercial
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value123000.014000.0385000.01324000.0580000.0578000.02523000.0953000.0819000.0577000.0319000.0581000.02777000.0348000.0940000.0219000.068000.0190000.0600000.0832000.01302000.041000.0
Percentage of CommercialAndMortgageTransferToRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:CommonStockDividendsPerRestrictedStockShareDeclared

buse:CommonStockDividendsPerRestrictedStockShareDeclared


Common
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value0.230.220.220.210.210.210.210.20.20.20.20.180.180.180.180.170.170.170.170.170.350.050.050.050.050.050.040.040.040.12
Percentage of CommonStockDividendsPerRestrictedStockShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:CommonStockDividendsRestrictedStockDeclared us-gaap:StatementEquityComponents

buse:CommonStockDividendsRestrictedStockDeclared

us-gaap:AdditionalPaidInCapital


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value-253000.0-236000.0-238000.0-166000.0-190000.0-173000.076000.0-186000.0-157000.0-161000.0-153000.0-133000.0-154000.0-128000.0-110000.0-161000.0-78000.0-103000.0-89000.0-98000.0-83000.0-82000.0-83000.0-71000.0-47000.0-67000.0-66000.0-66000.0-45000.0-35000.0-42000.0-28000.0-93000.0
Percentage of CommonStockDividendsRestrictedStockDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value253000.0236000.0238000.0166000.0190000.0173000.0-76000.0186000.0157000.0161000.0153000.0131000.0156000.0128000.0110000.0161000.078000.0103000.089000.098000.083000.082000.083000.071000.048000.066000.066000.066000.045000.035000.042000.028000.093000.0
Percentage of CommonStockDividendsRestrictedStockDeclared-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-98.5-101.3-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-102.1-98.5-100.0-100.0-100.0-100.0-100.0-100.0-100.0

buse:DerivativeGainLossesOnDerivativePayFixedReceiveFloating us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

buse:DerivativeGainLossesOnDerivativePayFixedReceiveFloating

us-gaap:InterestRateSwap, buse:NoninterestExpenses


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-1.26410460.549-2.861-23.47826-4.695
Percentage of DerivativeGainLossesOnDerivativePayFixedReceiveFloating100.0100.0100.0100.0100.0100.0100.0100.0

buse:DerivativeGainLossesOnDerivativePayFloatingReceiveFixed us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

buse:DerivativeGainLossesOnDerivativePayFloatingReceiveFixed

us-gaap:InterestRateSwap, buse:NoninterestExpenses


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.264-10.5952.86123
Percentage of DerivativeGainLossesOnDerivativePayFloatingReceiveFixed100.0100.0100.0100.0

us-gaap:InterestRateSwap, buse:NoninterestIncome


Derivative
Period End2020-09-302019-09-30
Value-0.5494.695
Percentage of DerivativeGainLossesOnDerivativePayFloatingReceiveFixed0.00.0

buse:FinancingReceivableFeesCaresAct us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

buse:FinancingReceivableFeesCaresAct

buse:PaycheckProtectionProgram


Financing
Period End2020-12-31
Value0.0
Percentage of FinancingReceivableFeesCaresAct0.0

buse:GainLossOnLifeInsuranceProceeds

buse:GainLossOnLifeInsuranceProceeds


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value14000.001242000.014000.095000.0493000.0
Percentage of GainLossOnLifeInsuranceProceeds100.00.0100.0100.0100.0100.0

buse:GainLossOnSaleOfLoansNet

buse:GainLossOnSaleOfLoansNet


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2.7643.3695.6429.977.4873.95.797
Percentage of GainLossOnSaleOfLoansNet100.0100.0100.0100.0100.0100.0100.0

buse:GainsLossesOnSalesOfOtherRealEstateExcludingAllowance

buse:GainsLossesOnSalesOfOtherRealEstateExcludingAllowance


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-162000.01000.0180000.00-46000.0-1000.018000.0-2000.083000.03000.0
Percentage of GainsLossesOnSalesOfOtherRealEstateExcludingAllowance100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

buse:IncreaseDecreaseInReserveForUnfundedCommitments

buse:IncreaseDecreaseInReserveForUnfundedCommitments


Increase
Period End2020-09-302020-06-30
Value300000.0600000.0
Percentage of IncreaseDecreaseInReserveForUnfundedCommitments100.0100.0

buse:InterchangeExpense

buse:InterchangeExpense


Interchange
Period End2021-06-302021-03-312020-06-302020-03-31
Value1442000.01484000.01198000.01169000.0
Percentage of InterchangeExpense100.0100.0100.0100.0

buse:InterestExpenseSeniorNotes

buse:InterestExpenseSeniorNotes


Interest
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value400000.0399000.0400000.0400000.0400000.0399000.0400000.0399000.0400000.0399000.0400000.0400000.0400000.0162000.0
Percentage of InterestExpenseSeniorNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:LoansAndLeasesReceivableLimitAboveWhichLoansAreAnnuallyReviewed us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment

buse:LoansAndLeasesReceivableLimitAboveWhichLoansAreAnnuallyReviewed

us-gaap:CommercialLoan, buse:WatchList


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-06-302014-03-31
Value01000000.00001000000.00001000000.00001000000.00001000000.00001000000.0001000000.00500000.0
Percentage of LoansAndLeasesReceivableLimitAboveWhichLoansAreAnnuallyReviewed0.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.0100.00.0100.0

buse:LoansAndLeasesReceivableLimitAboveWhichLoansAreAnnuallyReviewed us-gaap:InternalCreditAssessment

us-gaap:SpecialMention


Loans
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value350000.0000350000.0000350000.0000350000.0000350000.00-650000.01000000.0001000000.0
Percentage of LoansAndLeasesReceivableLimitAboveWhichLoansAreAnnuallyReviewed35.00.00.00.035.00.00.00.035.00.00.00.035.00.00.00.035.00.00.0100.00.00.0100.0

buse:LoansAndLeasesReceivableLimitAboveWhichLoansAreProcessedThroughExpeditedUnderwritingProcess us-gaap:Range, us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:LoansAndLeasesReceivableLimitAboveWhichLoansAreProcessedThroughExpeditedUnderwritingProcess

srt:Maximum, us-gaap:CommercialRealEstate


Loans
Period End2021-06-302021-03-312020-12-312019-09-30
Value01000000.000
Percentage of LoansAndLeasesReceivableLimitAboveWhichLoansAreProcessedThroughExpeditedUnderwritingProcess0.0100.00.00.0

buse:LoansInProcessOfForeclosure us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:LoansInProcessOfForeclosure

us-gaap:ResidentialRealEstate


Loans
Period End2021-01-31
Value400000.0
Percentage of LoansInProcessOfForeclosure100.0

buse:NetFeeIncomeAccretion us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

buse:NetFeeIncomeAccretion

buse:PaycheckProtectionProgramFirstRound


Net
Period End2021-03-31
Value3300000.0
Percentage of NetFeeIncomeAccretion100.0

buse:PaycheckProtectionProgramSecondRound


Net
Period End2021-03-31
Value300000.0
Percentage of NetFeeIncomeAccretion9.1

buse:NonOperatingExpensesBeforeTax us-gaap:Range, us-gaap:SubsequentEventType

buse:NonOperatingExpensesBeforeTax

srt:Maximum, us-gaap:SubsequentEvent


Non
Period End2020-12-31
Value7500000.0
Percentage of NonOperatingExpensesBeforeTax100.0

srt:Minimum, us-gaap:SubsequentEvent


Non
Period End2020-12-31
Value7000000.0
Percentage of NonOperatingExpensesBeforeTax93.3

buse:NumberOfBankingCentersConsolidated us-gaap:SubsequentEventType

buse:NumberOfBankingCentersConsolidated

us-gaap:SubsequentEvent


Number
Period End2021-07-272020-12-312020-09-30
Value15.012.012.0
Percentage of NumberOfBankingCentersConsolidated100.0100.0100.0

buse:OperatingLeasePaymentsFixedPayment

buse:OperatingLeasePaymentsFixedPayment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value590000.0546000.0687000.0616000.0612000.0611000.0608000.0605000.0570000.0513000.0
Percentage of OperatingLeasePaymentsFixedPayment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:OperatingLeasePaymentsLiabilityReduction

buse:OperatingLeasePaymentsLiabilityReduction


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value546000.0495000.0679000.0546000.0534000.0530000.0531000.0526000.0490000.0463000.0
Percentage of OperatingLeasePaymentsLiabilityReduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:RepurchaseOfStockTreasuryStock

buse:RepurchaseOfStockTreasuryStock


Repurchase
Period End2021-06-302020-06-30
Value5738000.0-3000.0
Percentage of RepurchaseOfStockTreasuryStock100.0100.0

buse:RepurchaseOfStockTreasuryStock us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Repurchase
Period End2021-06-302020-06-30
Value5738000.0-3000.0
Percentage of RepurchaseOfStockTreasuryStock100.0100.0

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentsEarnedWeightedAverageGrantDateFairValue us-gaap:AwardType

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentsEarnedWeightedAverageGrantDateFairValue

buse:DeferredStockUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2.2620.67-0.38-1.56-4.5925.5-0.010.510.2525.31-0.990.22-0.4231.180.61-0.170.1629.620.671.150.9518.43
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentsEarnedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2.1520.67-0.36-1.71-4.5825.500.510.2525.31-1.090.29-0.4231.180.56-0.20.1629.620.651.060.9518.43
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsDividendEquivalentsEarnedWeightedAverageGrantDateFairValue95.1100.094.7109.699.8100.0-0.0100.0100.0100.0110.1131.8100.0100.091.8117.6100.0100.097.092.2100.0100.0

buse:StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit

buse:StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value00-560000.0-75000.0-22000.0-6000.0-2190000.0129000.0-1063000.0-72000.0-298000.0-304000.048000.0-103000.0-548000.0-254000.0-1000.0-6000.00-122000.0-3000.0-16000.0-13000.00-11000.0-10000.0-105000.0-80000.0-3000.0-30000.0-16000.0
Percentage of StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

buse:StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0-2000.0-2467000.0-179000.0-59000.0-6000.0-2364000.0-171000.0129000.0-4184000.0-1875000.0-300000.0-4252000.048000.0-1017000.0-548000.0-2836000.0-15000.0-78000.00-3546000.0-32000.0-206000.0-146000.00-94000.0-135000.0-731000.0-1132000.0-29000.0-253000.0-16000.0
Percentage of StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit0.00.0440.5238.7268.2100.0107.90.0100.0393.62604.2100.71398.7100.0987.4100.01116.51500.01300.00.02906.61066.71287.51123.10.0854.51350.0696.21415.0966.7843.3100.0

us-gaap:TreasuryStock


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value02000.01907000.0104000.037000.00174000.0171000.003121000.01803000.02000.03948000.00914000.002582000.014000.072000.003424000.029000.0190000.0133000.0083000.0125000.0626000.01052000.026000.0223000.00
Percentage of StockIssuedDuringPeriodValueEquityInstrumentsOtherThanOptionsVestedAndRelatedTaxBenefit0.00.0-340.5-138.7-168.2-0.0-7.90.00.0-293.6-2504.2-0.7-1298.70.0-887.4-0.0-1016.5-1400.0-1200.00.0-2806.6-966.7-1187.5-1023.10.0-754.5-1250.0-596.2-1315.0-866.7-743.3-0.0

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-5.906-4.554-3.018-2.637-2.192-1.869-14.4062.5713.0352.6941.8372.242.9773.3985.8763.0591.5221.7483.12.3671.7150.2470.2540.6190.3410.262-1.78-1.828-1.911-1.786-1.923-2.084-2.188-2.549-2.564-2.548-2.393-2.225-2.019-1.784-1.384-1.438
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease

us-gaap:AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1.7-6.7963.1415.54912172.3673.4112.5172.111
Percentage of AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:RealEstateConstruction


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.671-1.250.37-0.3810.5740.889-0.124-0.3590.4110.002
Percentage of AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease-39.518.411.8-6.94.55.2-5.2-10.516.30.1

buse:RetailOther


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.0350.09-0.1580.0170.0020.0910.1040.2260.1010.048
Percentage of AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease-119.7-1.3-5.00.30.00.54.46.64.02.3

buse:RetailRealEstate


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.404-2.2762.415-0.3832.9814.037-0.11-0.0860.9411.357
Percentage of AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease-23.833.576.9-6.923.123.4-4.6-2.537.464.3

us-gaap:CommercialLoan


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1.42-0.6650.0932.5932.4735.6731.4760.4631.1611.793
Percentage of AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease83.59.83.046.719.233.062.413.646.184.9

us-gaap:CommercialRealEstate


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-3.39-2.6950.4213.7036.8616.5261.0213.167-0.097-1.089
Percentage of AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease199.439.713.466.753.237.943.192.8-3.9-51.6

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value527000.0655000.0907000.0643000.0473000.0735000.02267000.0678000.0884000.0625000.0
Percentage of AllowanceForDoubtfulAccountsReceivableRecoveries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableRecoveries us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:RealEstateConstruction


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value49000.0145000.0404000.026000.025000.0146000.0218000.0164000.087000.082000.0
Percentage of AllowanceForDoubtfulAccountsReceivableRecoveries9.322.144.54.05.319.99.624.29.813.1

buse:RetailOther


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value83000.085000.057000.089000.081000.0119000.0144000.0113000.0103000.0104000.0
Percentage of AllowanceForDoubtfulAccountsReceivableRecoveries15.713.06.313.817.116.26.416.711.716.6

buse:RetailRealEstate


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value151000.0265000.0311000.0301000.0262000.0338000.0302000.0221000.0369000.0192000.0
Percentage of AllowanceForDoubtfulAccountsReceivableRecoveries28.740.534.346.855.446.013.332.641.730.7

us-gaap:CommercialLoan


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value205000.086000.0104000.0124000.088000.088000.01580000.0147000.0137000.0183000.0
Percentage of AllowanceForDoubtfulAccountsReceivableRecoveries38.913.111.519.318.612.069.721.715.529.3

us-gaap:CommercialRealEstate


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value39000.074000.031000.0103000.017000.044000.023000.033000.0188000.064000.0
Percentage of AllowanceForDoubtfulAccountsReceivableRecoveries7.411.33.416.03.66.01.04.921.310.2

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.5380.9641.8413.3971.7024.1483.8512.4992.9412.469
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:RealEstateConstruction


Allowance
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.00.2090.00.018
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs0.021.70.00.5

buse:RetailOther


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0640.1870.090.1710.1050.2990.2670.2880.1780.13
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs4.219.44.95.06.27.26.911.56.15.3

buse:RetailRealEstate


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.1570.0030.9180.1390.2920.7080.2190.2260.20.517
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs10.20.349.94.117.217.15.79.06.820.9

us-gaap:CommercialLoan


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.00.2620.6942.51.142.0421.2910.8172.5631.807
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs65.027.237.773.667.049.233.532.787.173.2

us-gaap:CommercialRealEstate


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.3170.3030.1390.5690.1651.0992.0741.1680.00.015
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs20.631.47.616.89.726.553.946.70.00.6

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.4571.9472.2322.3522.1762.4872.6052.5713.0352.694
Percentage of AmortizationOfDeferredLoanOriginationFeesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfMortgageServicingRightsMSRs

us-gaap:AmortizationOfMortgageServicingRightsMSRs


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1345000.01616000.01735000.01307000.01349000.01276000.0649000.0839000.0686000.0536000.0378000.0394000.0
Percentage of AmortizationOfMortgageServicingRightsMSRs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:BankOwnedLifeInsuranceIncome


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1476000.0964000.01019000.01022000.02282000.01057000.02745000.01573000.02102000.0884000.0828000.0-302000.0502000.0726000.0393000.0716000.0540000.0348000.0265000.0579000.0484000.0194000.0364000.0358000.0353000.0379000.0360000.0358000.0-315000.0393000.0274000.0229000.0358000.0328000.0204000.0377000.0363000.0659000.0290000.0-635000.0346000.0456000.0318000.0343000.0
Percentage of BankOwnedLifeInsuranceIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationAcquisitionRelatedCosts

buse:CumminsAmericanCorp


Business
Period End2021-06-302021-03-31
Value2.70.3
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts us-gaap:BusinessAcquisition, us-gaap:IncomeStatementLocation

buse:InvestorsSecurityTrustCompany, buse:NonInterestExpense


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.10.10.10.20.50.10.2
Percentage of BusinessCombinationAcquisitionRelatedCosts0.00.00.00.00.00.00.00.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts us-gaap:IncomeStatementLocation

buse:NonInterestExpense


Business
Period End2020-12-312020-09-30
Value0.30.2
Percentage of BusinessCombinationAcquisitionRelatedCosts0.00.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferred1

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value129
Percentage of BusinessCombinationConsiderationTransferred1100.0

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value59
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable100.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred

buse:CumminsAmericanCorp


Business
Period End2021-01-19
Value169
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred100.0

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging


Cash
Period End2021-06-302021-03-312020-12-31
Value0-300000.0-600000.0
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths0.0100.0100.0

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease


Certain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value2.59.0-2.3-2.3-2.217
Percentage of CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value0.230.220.220.210.210.210.210.20.20.20.20.180.180.180.180.170.170.170.170.170.350.050.050.050.050.050.040.040.040.12
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value0.230.230.220.220.220.220.210.210.210.210.20.20.20.20.180.180.180.180.170.170.170.150.050.050.050.050.040.040.040.040.040.040.040.040.040.040.04
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommunicationsAndInformationTechnology

us-gaap:CommunicationsAndInformationTechnology


Communications
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4.8194.284.0433.9374.0514.3956.4625.0325.6164.4013.9924.0164.035.2316.0055.7533.9393.5987.9684.435.0153.2323.0973.0823.2123.5492.782.62.6872.8122.6522.6062.5682.6392.6953.5682.6392.1592.212.1452.172.112.1222.0081.951
Percentage of CommunicationsAndInformationTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesRealizedGainLoss

us-gaap:DebtAndEquitySecuritiesRealizedGainLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value94000.025000.014000.011000.0125000.01574000.0629000.0296000.0-10000.0-174000.0-1991000.00160000.0
Percentage of DebtAndEquitySecuritiesRealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:DebtInstrumentDecreaseForgiveness us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

us-gaap:DebtInstrumentDecreaseForgiveness

buse:PaycheckProtectionProgramFirstRound


Debt
Period End2021-03-31
Value478
Percentage of DebtInstrumentDecreaseForgiveness100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value499000.025000.014000.011000.0146000.01561000.0629000.0298000.0391000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGain100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value94000.025000.014000.011000.0143000.01556000.0629000.0297000.0-10000.0-183000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss


Debt
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value405000.0003000.05000.001000.0401000.0183000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedLoss100.00.00.0100.0100.00.0100.0100.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2.9012.8082.8893.0683.1513.1653.1783.0273.0032.6712.3982.412.3642.384
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings

us-gaap:InterestRateContract, us-gaap:CashFlowHedging


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value137000.0609000.0-149000.0-2248000.0
Percentage of DerivativeExcludedComponentGainLossRecognizedInEarnings100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeGainLossOnDerivativeNet

buse:InterestRateLockCommitmentsAndForwardSalesCommitments


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-22000.0-20000.0-674000.0154000.0-51000.0-20000.0-40000.0-107000.080000.0-31000.0-322000.0-53000.0739000.0714000.074000.01424000.0562000.0-1499000.0
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value137000.0-1575000.0-149000.0-2448000.0
Percentage of DerivativeGainLossOnDerivativeNet0.00.0745.0363.2

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

buse:InterestRateLockCommitmentsAndForwardSalesCommitments, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value-865000.0-348000.0-2565000.0-2198000.0
Percentage of DerivativeGainLossOnDerivativeNet0.00.012825.0326.1

us-gaap:DerivativeGainOnDerivative us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeGainOnDerivative

us-gaap:InterestRateLockCommitments, us-gaap:DesignatedAsHedgingInstrument, buse:GainLossOnSaleOfMortgageLoans


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.4930.4722.2134.849
Percentage of DerivativeGainOnDerivative100.0100.0100.0100.0

us-gaap:DerivativeGainOnDerivative us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

buse:InterestRateLockCommitmentsAndForwardSalesCommitments, buse:NoninterestIncome


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value4.0141.9296.672.3411.6551.9291.0781.0980.6411.0230.7322.0953.8224.9423.8656.403108.271
Percentage of DerivativeGainOnDerivative0.087.2137.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeLossOnDerivative us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeLossOnDerivative

us-gaap:ForwardContracts, us-gaap:DesignatedAsHedgingInstrument, buse:GainLossOnSaleOfMortgageLoans


Derivative
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.3580.824.7787.047
Percentage of DerivativeLossOnDerivative100.0100.0100.0100.0

us-gaap:DerivativeLossOnDerivative us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

buse:InterestRateLockCommitmentsAndForwardSalesCommitments, buse:NoninterestExpenses


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value4.0361.9497.3442.1871.7061.9491.1181.2050.5611.0541.0542.1483.0834.2283.7914.979109.77
Percentage of DerivativeLossOnDerivative0.040.8104.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value121211111112111111109.7729.7569.7439.7398.7538.186.8856.8796.4956.4944.884.8794.8784.3544.3454.3424.3434.3414.3413.4723.473.47110
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value121211111112111111109.7729.7569.7439.7398.7538.186.8856.8796.4956.4944.884.8794.8784.3544.3454.3424.3434.3414.3413.4723.473.47110
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquipmentExpense

us-gaap:EquipmentExpense


Equipment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2066000.02026000.02239000.02325000.02537000.02449000.02570000.02489000.02352000.02095000.01815000.01715000.01790000.01913000.01966000.01785000.01719000.01619000.02027000.01836000.01644000.01084000.01165000.01319000.01283000.01191000.01118000.01250000.01153000.01204000.01161000.01211000.01222000.01254000.01288000.01276000.01310000.01272000.01319000.01294000.01340000.01324000.01360000.01493000.01578000.0
Percentage of EquipmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value804000.01616000.0841000.0-437000.0190000.0-987000.0-24000.065000.0-1016000.0216000.0
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingInterestExpense

us-gaap:FinancingInterestExpense


Financing
Period End2021-06-302021-03-312020-06-302020-03-31
Value399000.0400000.0399000.0400000.0
Percentage of FinancingInterestExpense100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2


Financing
Period End2021-06-302021-03-312020-06-302020-03-312019-03-312018-09-30
Value400000.0500000.0400000.0500000.000
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.0100.0100.0100.00.00.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FinancialInstrumentPerformanceStatus

buse:RetailRealEstate, us-gaap:NonperformingFinancingReceivable


Financing
Period End2021-06-302021-03-31
Value0100000.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.020.0

us-gaap:CommercialLoan, us-gaap:NonperformingFinancingReceivable


Financing
Period End2021-06-302021-03-312020-06-302020-03-31
Value0500000.00500000.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.0100.00.0100.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:InternalCreditAssessment

buse:RetailRealEstate, us-gaap:PerformingFinancingReceivable


Financing
Period End2020-12-312020-09-302020-06-30
Value400000.0200000.0200000.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.050.0

us-gaap:FinancingReceivableSignificantPurchases us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:FinancingReceivableSignificantPurchases

buse:RetailRealEstate


Financing
Period End2021-06-302020-06-302020-03-31
Value320.043
Percentage of FinancingReceivableSignificantPurchases100.00.0100.0

us-gaap:GainLossOnSaleOfInvestments

us-gaap:GainLossOnSaleOfInvestments


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value94000.025000.014000.011000.0143000.01556000.0621000.0296000.0-1000.0-183000.0171000.00
Percentage of GainLossOnSaleOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:GainLossOnSaleOfMortgageLoans

us-gaap:GainLossOnSaleOfMortgageLoans


Gain
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value5.7932.7051.3813.5763.3312.8511.9451.0571.2721.5731.6432.713.5262.772.1342.8614.8423.3690.88
Percentage of GainLossOnSaleOfMortgageLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfMortgageLoans us-gaap:ProductOrService

us-gaap:MortgageBanking


Gain
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.7472.6662.7051.381
Percentage of GainLossOnSaleOfMortgageLoans0.00.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-31
Value852000.0134000.0-88000.0-7000.0-154000.0-37000.01000.02000.0-92000.0-24000.024000.0-81000.0-53000.0-52000.0270000.01000.052000.04000.0-215000.0-7000.0-38000.09000.0-210000.0-151000.023000.0-11000.0-263000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment


Impaired
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-312013-03-31
Value214048413427273959
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:RealEstateConstruction


Impaired
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-31
Value0.450.8880.5860.8470.7160.885
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment2.12.21.22.12.13.2

buse:RetailRealEstate


Impaired
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-31
Value5.561213131311
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment25.731.628.733.438.343.5

us-gaap:CommercialLoan


Impaired
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-31
Value7.52411159.818106.147
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment34.828.431.623.829.422.6

us-gaap:CommercialRealEstate


Impaired
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-31
Value8.075151816108.065
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment37.437.738.440.629.929.6

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf


Impairment
Period End2020-12-312020-09-30
Value6865000.00
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf100.00.0

us-gaap:ImpairmentOfRealEstate

us-gaap:ImpairmentOfRealEstate


Impairment
Period End2020-12-312019-12-31
Value25000.00
Percentage of ImpairmentOfRealEstate100.00.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-1356000.0-2448000.02579000.01588000.02864000.0-1722000.03720000.00-2065000.0-1751000.0-2523000.0-1095000.0-429000.0-3172000.0-17387000.05511000.0-978000.0-1053000.0-4901000.0-2673000.06019000.0-1398000.0-4971000.01219000.0886000.0-119000.0-716000.0-4584000.0-4463000.0-2952000.0-3385000.0-2089000.0-2221000.0-2415000.0
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value13919635-267.01293671-27.658977075-19.969-13.304-54.24-20.15-42.414-47.99-92.155-58.374-185.995
Percentage of IncreaseDecreaseInDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInEquitySecuritiesFvNi

us-gaap:IncreaseDecreaseInEquitySecuritiesFvNi


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value804000.01616000.0841000.0-437000.0190000.0-987000.0-24000.065000.0
Percentage of IncreaseDecreaseInEquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-19.51734-26.0277.39226-38.2412.99111-26.231-19.318-70.11154.798-69.255241515-26.076-23.20638-15.255-6.831-3.9892.609-9.323-15.218411623-55.11158.27217-8.2157.27112-25.59416-2.0383.1096.062-18.2488.563-5.135
Percentage of IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value9.255-0.262.46415-11.234-0.991-3.651-0.57-4.2973.121-7.7245.021.452-2.8455.626-6.176.493-14.3726.1971.394-8.361.1762.165-1.1340.778-1.672-4.5592.408-0.3520.229-0.703-0.712-7.208-1.257-5.538-0.628-2.3340.132-3.6762.718-2.748-4.039-32.3772.39
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-15.010.75-6.182-0.8651.69-1.194-3.77712-12.841-3.4279.415.766-2.58-10.4011.32-10.35211-6.943-7.4133.1221.025-3.0221.608-0.6722.89-5.1553.559-0.2661.345-5.2881.129-0.7971.529-1.9241.788-0.3691.418-1.8450.835-0.572-2.042-2.254-3.807-0.358
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value717281798184889191847472706870624644474740293129282827272626262727272829293031323334373839
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseDeposits


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.2953.7324.6386.1057.7211213141412108.9466.9045.9874.8743.8512.1632.0442.0672.0991.7921.1071.1321.1751.211.2391.1951.261.3061.3621.5221.6561.8242.0972.472.963.3183.7484.1244.4574.825.2596.177.3349.259
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseJuniorSubordinatedDebentures

us-gaap:InterestExpenseJuniorSubordinatedDebentures


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value732000.0725000.0740000.0740000.0736000.0744000.0756000.0852000.0892000.0914000.0867000.0854000.0814000.0715000.0669000.0649000.0621000.0587000.0573000.0538000.0462000.0337000.0317000.0306000.0301000.0293000.0298000.0298000.0294000.0293000.0301000.0303000.0301000.0301000.0318000.0329000.0328000.0337000.0319000.0301000.0616000.0683000.0685000.0699000.0684000.0
Percentage of InterestExpenseJuniorSubordinatedDebentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseOtherLongTermDebt

us-gaap:InterestExpenseOtherLongTermDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value116000.029000.030000.038000.034000.0423000.0588000.0700000.0741000.0579000.0284000.0245000.0213000.0
Percentage of InterestExpenseOtherLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase

us-gaap:InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value60000.057000.064000.088000.0100000.0408000.0559000.0579000.0627000.0583000.0487000.0426000.0372000.0341000.0360000.0291000.0204000.0123000.0119000.0102000.090000.082000.050000.044000.037000.051000.072000.040000.035000.039000.058000.044000.040000.044000.062000.063000.076000.078000.069000.087000.0100000.0
Percentage of InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase

us-gaap:InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value64000.019000.019000.030000.0118000.067000.0156000.0200000.0494000.0191000.0279000.0324000.0457000.0476000.0575000.0447000.027000.047000.0180000.0263000.0185000.013000.01000.0006000.09000.09000.08000.09000.09000.09000.09000.010000.010000.042000.041000.03000.0
Percentage of InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseSubordinatedNotesAndDebentures

us-gaap:InterestExpenseSubordinatedNotesAndDebentures


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2480000.02476000.02477000.02475000.01312000.0731000.0731000.0731000.0731000.0731000.0731000.0792000.0794000.0793000.0794000.0799000.0299000.0
Percentage of InterestExpenseSubordinatedNotesAndDebentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseTradingLiabilities us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:InterestExpenseTradingLiabilities

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging


Interest
Period End2020-12-312020-09-302020-06-30
Value300000.0300000.0200000.0
Percentage of InterestExpenseTradingLiabilities100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value667169645752697070666060585860544141434236262828272626252423232323222222202021222223192021
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeOther

us-gaap:InterestIncomeOther


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value245000.0150000.0127000.0213000.0145000.01238000.01824000.02181000.01083000.01232000.0911000.0649000.0508000.0423000.0
Percentage of InterestIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxExempt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value958000.01005000.01094000.01141000.01166000.01151000.01175000.01180000.01200000.01076000.01068000.01166000.01204000.01260000.01335000.01068000.0726000.0727000.0754000.0788000.0775000.0769000.0833000.0840000.0799000.0825000.0781000.0810000.0824000.0838000.0955000.0978000.0977000.0983000.01009000.0989000.0876000.0802000.0737000.0717000.0677000.0705000.0732000.0751000.0744000.0
Percentage of InterestIncomeSecuritiesTaxExempt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesTaxable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value9.0818.6118.5578.4668.8339.5089.5071011108.8368.0066.8316.4135.4644.6894.0473.6033.4023.3983.5763.6113.7423.7913.5253.2723.0043.1483.3952.882.9543.1623.2833.1713.4173.6043.8373.7683.6353.8454.0233.6893.363.3833.696
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value34303132283435383432272625282825
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value750000.0756000.0652000.0736000.0781000.0806000.0712000.0798000.0711000.0659000.0500000.0600000.0700000.0700000.0
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue


Life
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value989000.0964000.01005000.01022000.01040000.01043000.01047000.01080000.01086000.0978000.0
Percentage of LifeInsuranceCorporateOrBankOwnedChangeInValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans

us-gaap:LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans


Loans
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value400000.0500000.0400000.0500000.0700000.0500000.0400000.0700000.0600000.0400000.0300000.0400000.0500000.0400000.0200000.0200000.0300000.0200000.0100000.0100000.0100000.0
Percentage of LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MortgageServicingRightsMSRImpairmentRecovery

us-gaap:MortgageServicingRightsMSRImpairmentRecovery


Mortgage
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-30
Value2000.0-508000.044000.078000.0349000.0177000.00
Percentage of MortgageServicingRightsMSRImpairmentRecovery100.0100.0100.0100.0100.0100.00.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value625464565360656868574845475153463637443936272827283028262626272727293230292727252525252727
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.211.5533.6941.6591.9122.1222.5212.7392.7873.664
Percentage of NoninterestExpense5.12.85.82.93.63.53.84.04.16.4

us-gaap:NoninterestExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, buse:BankingSegment


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4842504441485256564538373741423829293731281920212123
Percentage of NoninterestExpense77.377.278.779.378.580.280.883.183.679.078.380.680.081.179.582.479.877.983.579.479.772.173.075.575.476.6

us-gaap:OperatingSegments, buse:RemittanceProcessingSegment


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4.2774.293.613.5233.2432.9032.8912.7462.5892.7642.9412.7182.6242.4662.2282.192.1742.1122.132.0912.1572.292.1892.1862.2051.946
Percentage of NoninterestExpense6.87.95.66.26.14.84.44.03.84.86.05.95.54.84.24.75.95.64.85.35.98.37.77.87.86.4

us-gaap:OperatingSegments, buse:WealthManagementSegment


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value6.7176.5656.3616.4976.2546.9747.1786.0435.7495.5645.3624.3074.7034.9115.2393.8963.983.9643.5855.093.7044.1053.883.9644.144.019
Percentage of NoninterestExpense10.712.09.911.511.811.511.08.98.59.711.09.49.99.69.98.310.810.58.112.910.214.813.714.214.613.2

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:NoninterestIncomeOtherOperatingIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.9281.1352.73.3391.7260.823-2.3744.8013.173.0523.0232.4062.5951.8953.1121.731.7641.280.3671.650.7851.5341.5861.1761.0431.1020.5460.8630.921.1410.9671.4021.1031.1321.5580.9031.3693.4070.4890.8270.7491.210.4470.5270.802
Percentage of NoninterestIncomeOtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet

us-gaap:OccupancyNet


Occupancy
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4.2464.5634.1884.2564.4484.7154.8114.6524.5114.2023.5323.7613.6893.8213.8053.7143.1263.1853.3333.4012.7322.1672.2082.092.1612.2452.0782.0862.0552.2432.1492.0552.1032.1822.3012.2372.1562.2052.1352.2112.1362.4152.1882.3742.231
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value608000.0564000.0647000.0622000.0635000.0620000.0628000.0619000.0584000.0533000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6.767-30.097-2.423-1.7184.08520-2.8233.356138.4076.212-2.159
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-69000.0410000.0-293000.014000.0-10000.0-2237000.0396000.0-598000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-69000.0410000.0-293000.014000.0-10000.0-2237000.0396000.0-598000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:InterestRateContract, us-gaap:CashFlowHedging


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-69000.0410000.0-293000.014000.0-10000.02237000.0396000.0-598000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-97000.0574000.0-410000.020000.0-14000.0-3129000.0554000.0-837000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax140.6140.0139.9142.9140.0-139.9139.9140.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-28000.0-164000.0117000.0-6000.04000.0892000.0-158000.0239000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-28000.0164000.0-117000.06000.0-4000.0-892000.0-320000.0-239000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax100.0-100.0-100.0-100.0-100.0-100.0202.5-100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-206000.0-199000.0-500000.0-192000.0139000.011000.04000.0-6000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-206000.0-199000.0-500000.0-192000.0139000.011000.08000.0-6000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0200.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:InterestRateContract, us-gaap:CashFlowHedging


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value206000.0199000.0500000.0192000.0-139000.0-11000.08000.0-6000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-288000.0-278000.0-700000.0-268000.0195000.015000.06000.0-9000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax-139.8-139.7-140.0-139.6-140.3-136.475.0150.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value82000.0-79000.0-200000.0-76000.056000.04000.02000.0-3000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value82000.079000.0200000.076000.0-56000.0-4000.0-2000.03000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value6.904-29.488-2.216-1.5123.93618-2.4312.764138.4076.212-2.159-1.191-6.259-3.2690.1540.44-0.171-6.722-1.2131.6543.977-4.4861.507-2.9142.4160.15-1.7532.4850.479-1.9050.594-6.904-0.871-2.5111.6321.413-0.1160.131.7533.045-0.836-3.8891.132
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value6.904-29.488-2.216-1.5123.93618-2.4312.764138.4076.212-2.159-1.191-6.259-3.2690.1540.44-0.171-6.722-1.2131.6543.977-4.4861.507-2.9142.4160.15-1.7532.4850.479-1.9050.594-6.904-0.871-2.511
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax


Other
Period End2020-09-302019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-30
Value-11000.089000.0-10000.0171000.00160000.00290000.0-4000.0857000.02000.011000.0152000.01067000.0401000.00-22000.01000.0736000.00-3000.043000.0471000.082000.01022000.0511000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-3000.0-25000.011000.0143000.01556000.0-837000.0297000.0-10000.0-184000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax0.00.0-100.00.00.00.0333.7100.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2000.018000.010000.08000.0102000.01108000.0448000.0212000.0-7000.0-132000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2000.018000.08000.0102000.01108000.0-598000.0212000.0-7000.0-132000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax100.0100.0100.0100.0100.0-133.5100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1000.0-7000.0-4000.0-3000.0-41000.0-448000.0181000.085000.03000.052000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1000.0-7000.0-3000.0-41000.0-448000.0-181000.0-85000.03000.052000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax100.0100.0100.0100.0100.0-100.0-100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value9.469-42.072-3.375-2.3925.857305.9854.991186.7996.908-3.019
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6.769-30.079-2.413-1.714.187214.2863.568134.8594.939-2.159
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6.769-30.079-2.413-1.714.187214.2863.568134.8594.939-2.159
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.711-0.962-0.6821.678.5891.6991.4235.1891.941.969-0.86
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.7-11.993-0.962-0.6821.678.5891.6991.4235.1891.941.969-0.86
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense

us-gaap:OtherNoninterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value107.416128.9948.972102.745141812108.968109.741108.1266.3085.5286.3955.9486.4714.4855.4214.3254.5915.3014.8844.2884.6793.8954.5324.7844.7224.7336.9275.115.4475.1015.4494.9964.6784.5543.524.5865.564
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value669111125832918219922316083891161229732140743232560368649535396886735856654260116143130157121151146197128
Percentage of PaymentsForOriginationOfMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromLoansReceivable

us-gaap:PaymentsForProceedsFromLoansReceivable


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-42.587-36.501-319.81-106.9248264171371672
Percentage of PaymentsForProceedsFromLoansReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value00560000.075000.022000.06000.072000.01062000.0299000.0716000.001259000.0548000.0249000.02000.010000.00242000.05000.022000.020000.0013000.012000.0124000.083000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation0.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value48478937555082273112691011251.2829912.16413125164
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

buse:CumminsAmericanCorp


Payments
Period End2021-05-31
Value70
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireLifeInsurancePolicies

us-gaap:PaymentsToAcquireLifeInsurancePolicies


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value16000.097000.004000.05000.0111000.03000.00
Percentage of PaymentsToAcquireLifeInsurancePolicies100.0100.00.0100.0100.0100.0100.00.0

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireMarketableSecurities


Payments
Period End2021-06-302021-03-312020-12-312020-09-30
Value5.00.9980.013
Percentage of PaymentsToAcquireMarketableSecurities100.0100.00.0100.0

us-gaap:ProceedsFromBankDebt

us-gaap:ProceedsFromBankDebt


Proceeds
Period End2020-12-312020-09-30
Value02391000.0
Percentage of ProceedsFromBankDebt0.0100.0

us-gaap:ProceedsFromLifeInsurancePolicies

us-gaap:ProceedsFromLifeInsurancePolicies


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value184000.002238000.0274000.002243000.0
Percentage of ProceedsFromLifeInsurancePolicies100.00.0100.0100.00.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2172071881611571581752201034348323943385155475764694948375856473250546044425677395347423121323734
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromOtherDebt

us-gaap:ProceedsFromOtherDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.0122200.00.00.060
Percentage of ProceedsFromOtherDebt0.00.0100.0100.00.00.00.0100.0

us-gaap:ProceedsFromSaleOfEquityMethodInvestments

us-gaap:ProceedsFromSaleOfEquityMethodInvestments


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.2370.998130.00.0040.0290.5160.00.00.9580.00.0
Percentage of ProceedsFromSaleOfEquityMethodInvestments100.0100.0100.00.0100.0100.0100.00.00.0100.00.00.0

us-gaap:ProceedsFromSaleOfLoansReceivable us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

us-gaap:ProceedsFromSaleOfLoansReceivable

buse:PaycheckProtectionProgramFirstRound


Proceeds
Period End2021-03-31
Value749
Percentage of ProceedsFromSaleOfLoansReceivable100.0

buse:PaycheckProtectionProgramSecondRound


Proceeds
Period End2021-03-31
Value262
Percentage of ProceedsFromSaleOfLoansReceivable35.0

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value899814928731816520419814593981201201653784483734936276934143246778368616653496514213614314513514913422212094130267203
Percentage of ProceedsFromSaleOfMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfOtherRealEstate

us-gaap:ProceedsFromSaleOfOtherRealEstate


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1.1160.2940.9470.0790.3320.0810.410.9520.9720.1471.0233.5530.0830.6390.9550.3040.5363.2290.5872.5221.0230.3660.1630.3270.1750.4250.0841.4030.6770.5751.3330.8330.4651.0145.7213.4532.9072.8698.2681.7031.3783.4829.576.679
Percentage of ProceedsFromSaleOfOtherRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value3399000.01759000.08000.04000.0195000.0607000.031000.0390000.0298000.024000.01602000.011000.0567000.044000.01621000.019000.0833000.012000.01000.0296000.06000.09000.070000.01000.05000.02000.07000.02248000.0139000.0462000.0058000.0019000.097000.00-1000.0110000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.00.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00005000.041000.0216000.0130000.0741000.028000.00137000.0
Percentage of ProceedsFromStockOptionsExercised0.00.00.00.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.3111.9452.8881.6981.9861.8242.1032.6223.1923.187
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanAndLeaseLosses


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1.7-6.7963.1415.54912172.3673.4112.5172.1110.4050.7582.2581.0082.8091.4940.50.51.51.951.11.01.00.10.00.50.00.01.01.01.52.02.02.03.53.54.55.05.05.05.05.0109.5
Percentage of ProvisionForLoanAndLeaseLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-1.7-6.7963.1415.54912172.3673.4112.5172.1110.4050.7582.2581.0082.8091.4940.50.51.51.951.11.01.00.10.00.50.00.01.01.01.52.02.02.03.53.54.55.05.05.05.05.0109.57.5
Percentage of ProvisionForLoanLossesExpensed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfBankDebt

us-gaap:RepaymentsOfBankDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312018-12-31
Value4.1640.1630.161.19321200
Percentage of RepaymentsOfBankDebt100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfOtherDebt

us-gaap:RepaymentsOfOtherDebt


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0200.0541.51.51.51.5
Percentage of RepaymentsOfOtherDebt0.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RevenueNotFromContractWithCustomerExcludingInterestIncome

us-gaap:RevenueNotFromContractWithCustomerExcludingInterestIncome


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3331303227273130
Percentage of RevenueNotFromContractWithCustomerExcludingInterestIncome100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueNotFromContractWithCustomerExcludingInterestIncome us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.2641.1130.195-1.187-0.334-1.429-0.65-0.447
Percentage of RevenueNotFromContractWithCustomerExcludingInterestIncome0.83.50.6-3.7-1.2-5.2-2.1-1.4

us-gaap:RevenueNotFromContractWithCustomerExcludingInterestIncome us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, buse:BankingSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1412151814131618
Percentage of RevenueNotFromContractWithCustomerExcludingInterestIncome45.341.050.357.450.247.953.359.2

us-gaap:OperatingSegments, buse:RemittanceProcessingSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4.8094.8614.234.2873.9624.0694.0644.088
Percentage of RevenueNotFromContractWithCustomerExcludingInterestIncome14.615.513.913.314.214.812.813.2

us-gaap:OperatingSegments, buse:WealthManagementSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value131210101011118.994
Percentage of RevenueNotFromContractWithCustomerExcludingInterestIncome39.440.035.233.036.942.635.929.1

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1462000.0148000.0615000.000128000.00159000.0764000.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.00.00.0100.00.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability us-gaap:BusinessAcquisition

buse:CumminsAmericanCorp


Right
Period End2021-06-30
Value371000.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability25.4

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-30
Value-1.9426.98-0.0828.96-2.990
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

buse:DeferredStockUnits


Share
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.0524.5400000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-312016-12-312016-07-112012-12-312012-09-30
Value024.540000022.440.01-0.24
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

buse:DeferredStockUnits


Share
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.9620.67-0.27-0.34-0.13-0.11-0.060.050.210.16-6.8129.620.080.081.5918.43
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value000.1400-3.300.13014.600.020.5714.02
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue-0.0-0.0-107.7-0.0-0.0-6600.00.081.3-0.049.30.025.035.876.1

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2020-12-31
Value-5.28
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value023.530
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice0.0100.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:Range, us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

srt:Maximum, buse:MarketBasedPerformanceStockUnits


Sharebased
Period End2021-03-31
Value160.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.0

srt:Maximum, buse:PerformanceStockUnits


Sharebased
Period End2021-03-31
Value140.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage87.5

srt:Maximum, us-gaap:PerformanceShares


Sharebased
Period End2021-03-312020-09-30
Value140.0160.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage87.50.0

srt:Minimum, buse:MarketBasedPerformanceStockUnits


Sharebased
Period End2021-03-31
Value0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage0.0

srt:Minimum, buse:PerformanceStockUnits


Sharebased
Period End2021-03-31
Value0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage0.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:PlanName

srt:Director, buse:DeferredStockUnits, buse:The2020EquityIncentivePlan


Sharebased
Period End2021-05-19
Value100.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage0.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value16000.018000.0-10000.015000.015000.015000.015000.046000.08000.015000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions

us-gaap:StockIssuedDuringPeriodValueAcquisitions


Stock
Period End2021-06-302019-12-312019-09-302019-06-302019-03-312016-12-312016-09-30
Value580.00.00.01660.00.0
Percentage of StockIssuedDuringPeriodValueAcquisitions100.00.00.00.0100.00.00.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302019-12-312019-09-302019-06-302019-03-312016-12-312016-09-30
Value580.00.00.01660.00.0
Percentage of StockIssuedDuringPeriodValueAcquisitions100.00.00.00.0100.00.00.0

us-gaap:CommonStock


Stock
Period End2021-06-302019-12-312019-09-302019-06-302019-03-312016-12-312016-09-30
Value0.0020.00.00.00.0070.00.0
Percentage of StockIssuedDuringPeriodValueAcquisitions0.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value111000.093000.0112000.0231000.0135000.0104000.0113000.0272000.0107000.091000.092000.0246000.087000.086000.0103000.0200000.060000.047000.043000.0163000.041000.057000.045000.0148000.054000.072000.041000.044000.024000.027000.022000.033000.029000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value9000.0-23000.0-7000.0-38000.037000.021000.029000.050000.020000.033000.0-80000.0-248000.0-88000.0-91000.0-122000.0-239000.0-64000.0-90000.0-92000.0-370000.0-95000.0-129000.0-86000.0-280000.0-105000.0-181000.0-91000.0-104000.0-54000.0-67000.0-71000.0-96000.0-83000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan8.1-24.7-6.2-16.527.420.225.718.418.736.3-87.0-100.8-101.1-105.8-118.4-119.5-106.7-191.5-214.0-227.0-231.7-226.3-191.1-189.2-194.4-251.4-222.0-236.4-225.0-248.1-322.7-290.9-286.2

us-gaap:TreasuryStock


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value102000.0116000.0119000.0269000.098000.083000.084000.0222000.087000.058000.0172000.0494000.0175000.0177000.0225000.0439000.0124000.0137000.0135000.0533000.0136000.0186000.0131000.0428000.0159000.0253000.0132000.0148000.078000.094000.093000.0129000.0112000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan91.9124.7106.2116.572.679.874.381.681.363.7187.0200.8201.1205.8218.4219.5206.7291.5314.0327.0331.7326.3291.1289.2294.4351.4322.0336.4325.0348.1422.7390.9386.2

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value2437000.01448000.02722000.02205000.01069000.01139000.0761000.01205000.01017000.01014000.01055000.0944000.0874000.0848000.0817000.0802000.0588000.0545000.0494000.0517000.0403000.0389000.0417000.0409000.0251000.0341000.0352000.0356000.0255000.0224000.0429000.0255000.0144000.0251000.0269000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value2437000.01448000.02722000.02205000.01069000.01139000.0761000.01205000.01017000.01014000.01055000.0944000.0874000.0848000.0817000.0802000.0588000.0545000.0494000.0517000.0403000.0389000.0417000.0409000.0251000.0341000.0352000.0356000.0255000.0224000.0429000.0255000.0144000.0251000.0269000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense


Stock
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value00101000.0001524000.0-197000.040000.0216000.0130000.0461000.028000.00137000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense0.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value00-41000.0-10000.0-7000.0-6000.0-19000.0-72000.0-384000.0-138000.0-1161000.0-1206000.0-2216000.0-139000.0-103000.0-681000.0-1664000.0-105000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense0.00.0-40.60.00.00.0-1.20.0194.9-345.0-537.5-927.7-480.7-496.40.0-497.10.00.0

us-gaap:TreasuryStock


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value00142000.010000.07000.06000.01543000.072000.0187000.0178000.01377000.01336000.02677000.0167000.0103000.0818000.01668000.052000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense0.00.0140.60.00.00.0101.20.0-94.9445.0637.51027.7580.7596.40.0597.10.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302015-12-31
Value1.512.6030.0-0.0039.672104.898.4330.0
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.00.0100.0100.0100.0100.0100.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302015-12-31
Value1.512.6030.0-0.0039.672104.898.4330.0
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.00.0100.0100.0100.0100.0100.00.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value126000.0174000.015000.099000.0131000.0171000.069000.0133000.0119000.0111000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value680810.0152000.0216000.0251000.0236000.0303000.0301000.0355000.0409000.0404000.0440000.0441000.0461000.0398000.0308000.0190000.0153000.0557000.0551000.0419000.0368000.0365000.0275000.08000.08000.09000.010000.011000.020000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:AvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue

buse:AvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1.021.880.30.210.47
Percentage of AvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue100.0100.0100.0100.0100.0

buse:BankPropertyHeldForSaleFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique

buse:BankPropertyHeldForSaleFairValueDisclosure

buse:BankPropertyHeldForSale, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, buse:AppraisalOfCollateralOrRealEstateListingPriceValuationTechnique


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7.3799.101103.5943.5943.4134.0041.8321.8321.8321.8323.7113.711
Percentage of BankPropertyHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:BankPropertyHeldForSaleFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7.3799.101103.5943.5943.4134.0041.8321.8321.8321.8323.7113.711
Percentage of BankPropertyHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:BankPropertyHeldForSaleFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7.3799.101103.5943.5943.4134.0041.8321.8321.8321.8323.7113.711
Percentage of BankPropertyHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:BrokeredDeposits

buse:BrokeredDeposits


Brokered
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-312011-12-31
Value5.35.35.25.557108121262250247425.05.05.05.00.40.50.50.729
Percentage of BrokeredDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:BrokeredSavingDepositsAndMoneyMarketDeposits

buse:BrokeredSavingDepositsAndMoneyMarketDeposits


Brokered
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-09-302018-06-302017-12-31
Value2.0022.6992.25111311312305175
Percentage of BrokeredSavingDepositsAndMoneyMarketDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:BrokeredTimeDeposits

buse:BrokeredTimeDeposits


Brokered
Period End2021-06-302021-03-312020-12-312019-12-312018-09-302018-06-302017-12-31
Value0.2615.2595.2575.498351311247
Percentage of BrokeredTimeDeposits100.0100.0100.0100.0100.0100.0100.0

buse:BusiPercentageOfCashTransferredInBusinessCombinationAsConsideration.nessCombinationCashConsiderationTransferredPercentage us-gaap:BusinessAcquisition

buse:BusiPercentageOfCashTransferredInBusinessCombinationAsConsideration.nessCombinationCashConsiderationTransferredPercentage

buse:CumminsAmericanCorp


Busi
Period End2021-01-19
Value73.0
Percentage of BusiPercentageOfCashTransferredInBusinessCombinationAsConsideration.nessCombinationCashConsiderationTransferredPercentage100.0

buse:BusiPercentageOfCashTransferredInBusinessCombinationAsConsideration.nessCombinationCashConsiderationTransferredPercentage us-gaap:StatementScenario, us-gaap:BusinessAcquisition

srt:ScenarioForecast, buse:CumminsAmericanCorp


Busi
Period End2021-01-19
Value73.0
Percentage of BusiPercentageOfCashTransferredInBusinessCombinationAsConsideration.nessCombinationCashConsiderationTransferredPercentage100.0

buse:BusinessCombinationEquityConsiderationTransferredPercentage us-gaap:BusinessAcquisition

buse:BusinessCombinationEquityConsiderationTransferredPercentage

buse:CumminsAmericanCorp


Business
Period End2021-01-19
Value27.0
Percentage of BusinessCombinationEquityConsiderationTransferredPercentage100.0

buse:BusinessCombinationEquityConsiderationTransferredPercentage us-gaap:StatementScenario, us-gaap:BusinessAcquisition

srt:ScenarioForecast, buse:CumminsAmericanCorp


Business
Period End2021-01-19
Value27.0
Percentage of BusinessCombinationEquityConsiderationTransferredPercentage100.0

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits us-gaap:BusinessAcquisition

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value1324
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits100.0

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoans us-gaap:BusinessAcquisition

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoans

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value430
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoans100.0

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageServicingRights us-gaap:BusinessAcquisition

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageServicingRights

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value629000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedMortgageServicingRights100.0

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets us-gaap:BusinessAcquisition

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value8.178
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets100.0

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherBorrowings us-gaap:BusinessAcquisition

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherBorrowings

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value16
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherBorrowings100.0

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilities us-gaap:BusinessAcquisition

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilities

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value18
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherLiabilities100.0

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSecuritiesAvailableForSale us-gaap:BusinessAcquisition

buse:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSecuritiesAvailableForSale

buse:CumminsAmericanCorp


Business
Period End2021-05-31
Value702
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSecuritiesAvailableForSale100.0

buse:CommonEquityTierOneRiskBasedCapital

buse:CommonEquityTierOneRiskBasedCapital


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value988933909890867847848833830824709690672655644600502491484478468347341335333327
Percentage of CommonEquityTierOneRiskBasedCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:CommonEquityTierOneRiskBasedCapital us-gaap:ConsolidatedEntities

buse:BuseyBank


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value11331094105310199829471045830842831803812784757651502
Percentage of CommonEquityTierOneRiskBasedCapital114.7117.2115.9114.5113.2111.8123.399.7101.4100.9113.2117.7116.6115.6101.1103.8

buse:GsbBank


Common
Period End2021-06-30
Value105
Percentage of CommonEquityTierOneRiskBasedCapital10.7

buse:CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy

buse:CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value362327329331332340332334327325271389382377340316243237221220219149133130128125
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy us-gaap:ConsolidatedEntities

buse:BuseyBank


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value333327328331332339331285276274270387380375317219
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy91.999.899.899.899.999.899.885.284.584.299.899.599.599.493.299.2

buse:GsbBank


Common
Period End2021-06-30
Value28
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy7.7

buse:CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets

buse:CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4.54.54.54.50.0450.0450.0450.0450.0450.0450.0450.063750.063750.063750.05750.05750.05750.05750.051250.051250.051250.051250.0450.0450.0450.045
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets us-gaap:ConsolidatedEntities

buse:BuseyBank


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value4.54.54.54.50.0450.0450.0450.0450.0450.0450.0450.063750.063750.063750.05750.05125
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:GsbBank


Common
Period End2021-06-30
Value4.5
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0

buse:CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized

buse:CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value523473475479480491480483472470392397390384384357275268280280278189192189185180
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized us-gaap:ConsolidatedEntities

buse:BuseyBank


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value481472474478479490479411399395391395388382358278
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized91.999.899.899.899.999.899.885.284.584.299.899.599.599.493.299.2

buse:GsbBank


Common
Period End2021-06-30
Value40
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized7.7

buse:CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

buse:CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value6.56.56.56.50.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.065
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets us-gaap:ConsolidatedEntities

buse:BuseyBank


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value6.56.56.56.50.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.0650.065
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:GsbBank


Common
Period End2021-06-30
Value6.5
Percentage of CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets100.0

buse:CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets

buse:CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value12.2612.8312.4312.080.11730.11220.11490.1120.11410.1140.11770.11290.11210.11070.1090.10920.11860.1190.11220.1110.10950.11910.11520.11520.11710.1178
Percentage of CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

buse:BuseyBank


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value15.315.0614.4413.860.1330.12560.14190.13110.1370.13650.13350.13360.13140.12870.11820.1174
Percentage of CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets124.8117.4116.2114.7113.4111.9123.5117.1120.1119.7113.4118.3117.2116.3108.4104.6

buse:GsbBank


Common
Period End2021-06-30
Value16.95
Percentage of CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets138.3

buse:CustomerAssetsHeldInTrust

buse:CustomerAssetsHeldInTrust


Customer
Period End2021-06-302021-03-312020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value124001080010200970071006000540051005200500042003800
Percentage of CustomerAssetsHeldInTrust100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:DeferredTaxAssetsLeaseLiabilities

buse:DeferredTaxAssetsLeaseLiabilities


Deferred
Period End2020-12-312019-12-31
Value2142000.02650000.0
Percentage of DeferredTaxAssetsLeaseLiabilities100.0100.0

buse:DeferredTaxAssetsPurchaseAccountingAdjustments

buse:DeferredTaxAssetsPurchaseAccountingAdjustments


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.47114.5637.7127.1861.308
Percentage of DeferredTaxAssetsPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0

buse:DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationCosts

buse:DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationCosts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2654000.01730000.01593000.01168000.0
Percentage of DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationCosts100.0100.0100.0100.0

buse:DeferredTaxLiabilitiesPurchaseAccountingAdjustments

buse:DeferredTaxLiabilitiesPurchaseAccountingAdjustments


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1835000.01023000.01102000.01262000.02242000.0645000.0
Percentage of DeferredTaxLiabilitiesPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0

buse:DeferredTaxLiabilitiesUnrealizedGainsOnEquitySecurities

buse:DeferredTaxLiabilitiesUnrealizedGainsOnEquitySecurities


Deferred
Period End2020-12-312019-12-312018-12-31
Value276000.0593000.0662000.0
Percentage of DeferredTaxLiabilitiesUnrealizedGainsOnEquitySecurities100.0100.0100.0

buse:DeferredTaxLiabilitiesUnrealizedGainsOnSecuritiesAvailableForSaleAndCashFlowHedges

buse:DeferredTaxLiabilitiesUnrealizedGainsOnSecuritiesAvailableForSaleAndCashFlowHedges


Deferred
Period End2020-12-312019-12-31
Value146.032
Percentage of DeferredTaxLiabilitiesUnrealizedGainsOnSecuritiesAvailableForSaleAndCashFlowHedges100.0100.0

buse:DepositsInterestBearingTransactionDepositsSavingDepositsAndMoneyMarketDeposits

buse:DepositsInterestBearingTransactionDepositsSavingDepositsAndMoneyMarketDeposits


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value331226792743255325552598254524582390240218521879195320582026186015512516245325111949
Percentage of DepositsInterestBearingTransactionDepositsSavingDepositsAndMoneyMarketDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:DerivativeSwapTypeVariableRate us-gaap:DerivativeInstrumentRisk

buse:DerivativeSwapTypeVariableRate

us-gaap:InterestRateSwap


Derivative
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value39529025520316712194958580
Percentage of DerivativeSwapTypeVariableRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:DerivativeSwapTypeVariableRate us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:InterestRateSwap, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value408401395395342325290
Percentage of DerivativeSwapTypeVariableRate0.00.0100.00.00.00.0100.0

buse:FinancingReceivableAmortizedCostCaresAct us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

buse:FinancingReceivableAmortizedCostCaresAct

buse:PaycheckProtectionProgram


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value390522446736729
Percentage of FinancingReceivableAmortizedCostCaresAct100.0100.0100.0100.0100.0

buse:PaycheckProtectionProgramCaresAct


Financing
Period End2021-06-30
Value93
Percentage of FinancingReceivableAmortizedCostCaresAct23.8

buse:PaycheckProtectionProgramEconomicAidAct


Financing
Period End2021-06-30
Value297
Percentage of FinancingReceivableAmortizedCostCaresAct76.2

buse:FinancingReceivableForgivenessApplicationAmount us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

buse:FinancingReceivableForgivenessApplicationAmount

buse:PaycheckProtectionProgram


Financing
Period End2020-12-31
Value167
Percentage of FinancingReceivableForgivenessApplicationAmount100.0

buse:PaycheckProtectionProgramFirstRound


Financing
Period End2021-03-31
Value131
Percentage of FinancingReceivableForgivenessApplicationAmount0.0

buse:FinancingReceivablePaymentDeferralModificationsNotClassifiedAsTroubledDebtRestructuringAmount us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

buse:FinancingReceivablePaymentDeferralModificationsNotClassifiedAsTroubledDebtRestructuringAmount

buse:PersonalLoan


Financing
Period End2020-12-31
Value47
Percentage of FinancingReceivablePaymentDeferralModificationsNotClassifiedAsTroubledDebtRestructuringAmount100.0

us-gaap:CommercialLoan


Financing
Period End2020-12-31
Value208
Percentage of FinancingReceivablePaymentDeferralModificationsNotClassifiedAsTroubledDebtRestructuringAmount437.3

us-gaap:HomeEquityLoan


Financing
Period End2020-12-31
Value0.1
Percentage of FinancingReceivablePaymentDeferralModificationsNotClassifiedAsTroubledDebtRestructuringAmount0.2

buse:FinancingReceivablePriorLoans

buse:FinancingReceivablePriorLoans


Financing
Period End2021-06-302021-03-312020-12-31
Value868926650
Percentage of FinancingReceivablePriorLoans100.0100.0100.0

buse:FinancingReceivablePriorLoans us-gaap:FinancingReceivablePortfolioSegment

buse:RetailOther


Financing
Period End2021-06-302021-03-312020-12-31
Value4.5370.8580.497
Percentage of FinancingReceivablePriorLoans0.50.10.1

buse:RetailRealEstate


Financing
Period End2021-06-302021-03-312020-12-31
Value358361263
Percentage of FinancingReceivablePriorLoans41.339.140.5

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-31
Value157159105
Percentage of FinancingReceivablePriorLoans18.117.216.3

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-31
Value346402278
Percentage of FinancingReceivablePriorLoans39.943.442.9

us-gaap:ConstructionLoans


Financing
Period End2021-06-302021-03-312020-12-31
Value1.4181.8361.445
Percentage of FinancingReceivablePriorLoans0.20.20.2

buse:FinancingReceivablePriorLoans us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

buse:RetailOther, us-gaap:Doubtful


Financing
Period End2021-06-302021-03-312020-12-31
Value0.0020.0580.057
Percentage of FinancingReceivablePriorLoans0.00.00.0

buse:RetailOther, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-31
Value4.5350.80.44
Percentage of FinancingReceivablePriorLoans0.50.10.1

buse:RetailRealEstate, buse:WatchList


Financing
Period End2021-06-302021-03-312020-12-31
Value0.3880.8460.233
Percentage of FinancingReceivablePriorLoans0.00.10.0

buse:RetailRealEstate, us-gaap:Doubtful


Financing
Period End2021-06-302021-03-312020-12-31
Value4.6734.8184.815
Percentage of FinancingReceivablePriorLoans0.50.50.7

buse:RetailRealEstate, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-31
Value349351257
Percentage of FinancingReceivablePriorLoans40.238.039.5

buse:RetailRealEstate, us-gaap:SpecialMention


Financing
Period End2021-06-302021-03-31
Value1.9341.948
Percentage of FinancingReceivablePriorLoans0.20.2

buse:RetailRealEstate, us-gaap:Substandard


Financing
Period End2021-06-302021-03-312020-12-31
Value2.4852.4971.631
Percentage of FinancingReceivablePriorLoans0.30.30.3

us-gaap:CommercialPortfolioSegment, buse:WatchList


Financing
Period End2021-06-302021-03-312020-12-31
Value9.831210
Percentage of FinancingReceivablePriorLoans1.11.41.7

us-gaap:CommercialPortfolioSegment, us-gaap:Doubtful


Financing
Period End2021-06-302021-03-312020-12-31
Value0.1180.5520.068
Percentage of FinancingReceivablePriorLoans0.00.10.0

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-31
Value12912679
Percentage of FinancingReceivablePriorLoans14.913.712.3

us-gaap:CommercialPortfolioSegment, us-gaap:SpecialMention


Financing
Period End2021-06-302021-03-312020-12-31
Value181813
Percentage of FinancingReceivablePriorLoans2.12.02.1

us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-312020-12-31
Value0.080.1251.233
Percentage of FinancingReceivablePriorLoans0.00.00.2

us-gaap:CommercialRealEstatePortfolioSegment, buse:WatchList


Financing
Period End2021-06-302021-03-312020-12-31
Value414827
Percentage of FinancingReceivablePriorLoans4.85.24.2

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Doubtful


Financing
Period End2021-06-302021-03-312020-12-31
Value1.8541.9381.647
Percentage of FinancingReceivablePriorLoans0.20.20.3

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-31
Value291334227
Percentage of FinancingReceivablePriorLoans33.636.234.9

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:SpecialMention


Financing
Period End2021-06-302021-03-312020-12-31
Value9.7941321
Percentage of FinancingReceivablePriorLoans1.11.53.4

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-312020-12-31
Value1.763.0051.377
Percentage of FinancingReceivablePriorLoans0.20.30.2

us-gaap:ConstructionLoans, buse:WatchList


Financing
Period End2021-06-302021-03-31
Value0.1410.156
Percentage of FinancingReceivablePriorLoans0.00.0

us-gaap:ConstructionLoans, us-gaap:Doubtful


Financing
Period End2020-12-31
Value0.001
Percentage of FinancingReceivablePriorLoans0.0

us-gaap:ConstructionLoans, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-31
Value1.2771.681.444
Percentage of FinancingReceivablePriorLoans0.10.20.2

buse:FinancingReceivablePurchasedCreditImpairedEvaluatedForImpairment

buse:FinancingReceivablePurchasedCreditImpairedEvaluatedForImpairment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2279000.02272000.02557000.02593000.02581000.03048000.03810000.04100000.04683000.02778000.0
Percentage of FinancingReceivablePurchasedCreditImpairedEvaluatedForImpairment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:FinancingReceivablePurchasedCreditImpairedEvaluatedForImpairment us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:RealEstateConstruction


Financing
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value255000.0255000.0255000.0435000.0435000.0435000.0
Percentage of FinancingReceivablePurchasedCreditImpairedEvaluatedForImpairment10.09.89.914.311.410.6

buse:RetailRealEstate


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value371000.0366000.0386000.0412000.0453000.0696000.0922000.01173000.094000.098000.0
Percentage of FinancingReceivablePurchasedCreditImpairedEvaluatedForImpairment16.316.115.115.917.622.824.228.62.03.5

us-gaap:CommercialRealEstate


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1908000.01906000.01916000.01922000.01865000.01904000.02435000.02461000.04558000.02262000.0
Percentage of FinancingReceivablePurchasedCreditImpairedEvaluatedForImpairment83.783.974.974.172.362.563.960.097.381.4

buse:InterestBearingTransactionDeposits

buse:InterestBearingTransactionDeposits


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value272223122263226622261982198920391926181214351325123812121166118910161032
Percentage of InterestBearingTransactionDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:InvestmentsInBankingSubsidiaries us-gaap:ConsolidatedEntities

buse:InvestmentsInBankingSubsidiaries

srt:ParentCompany


Investments
Period End2020-12-312019-12-312018-12-31
Value141714171088
Percentage of InvestmentsInBankingSubsidiaries100.0100.0100.0

buse:InvestmentsInNonBankingSubsidiaries us-gaap:ConsolidatedEntities

buse:InvestmentsInNonBankingSubsidiaries

srt:ParentCompany


Investments
Period End2020-12-312019-12-31
Value2.7460.806
Percentage of InvestmentsInNonBankingSubsidiaries100.0100.0

buse:LesseeOperatingLeaseLiabilityInterest

buse:LesseeOperatingLeaseLiabilityInterest


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value565000.0679000.0728000.0851000.0
Percentage of LesseeOperatingLeaseLiabilityInterest100.0100.0100.0100.0

buse:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

buse:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2021-06-302021-03-31
Value1708000.01792000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour100.0100.0

buse:LimitOnInclusionOfQualifiedTrustPreferredSecuritiesInTierOneCapitalPercentage us-gaap:ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTerms

buse:LimitOnInclusionOfQualifiedTrustPreferredSecuritiesInTierOneCapitalPercentage

us-gaap:TrustPreferredSecuritiesSubjectToMandatoryRedemption


Limit
Period End2020-12-31
Value25.0
Percentage of LimitOnInclusionOfQualifiedTrustPreferredSecuritiesInTierOneCapitalPercentage100.0

buse:LoansAndLeasesReceivableRelatedPartiesUnusedCommitments us-gaap:RelatedPartyTransactionsByRelatedParty

buse:LoansAndLeasesReceivableRelatedPartiesUnusedCommitments

buse:DirectorAndExecutiveOfficer


Loans
Period End2020-12-31
Value50
Percentage of LoansAndLeasesReceivableRelatedPartiesUnusedCommitments100.0

buse:LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated

buse:LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value524.5844.7574.931353583858650
Percentage of LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

buse:OtherServicingAssetAtFairValueAmount us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

buse:OtherServicingAssetAtFairValueAmount

us-gaap:FairValueInputsLevel3, us-gaap:CarryingReportedAmountFairValueDisclosure


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1573000.01528000.01434000.01199000.01136000.01070000.01071000.01039000.0845000.0839000.0781000.0616000.0390000.0353000.0280000.0204000.0186000.0
Percentage of OtherServicingAssetAtFairValueAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2084000.02055000.01966000.01696000.01623000.01632000.01740000.01676000.01434000.01413000.01443000.01236000.01041000.0947000.0901000.0921000.0683000.0
Percentage of OtherServicingAssetAtFairValueAmount132.5134.5137.1141.5142.9152.5162.5161.3169.7168.4184.8200.6266.9268.3321.8451.5367.2

buse:PaycheckProtectionProgramLoansAcquiredAmount us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

buse:PaycheckProtectionProgramLoansAcquiredAmount

buse:PaycheckProtectionProgram


Paycheck
Period End2021-06-30
Value43
Percentage of PaycheckProtectionProgramLoansAcquiredAmount100.0

buse:PaycheckProtectionProgramCaresAct


Paycheck
Period End2021-06-30
Value15
Percentage of PaycheckProtectionProgramLoansAcquiredAmount36.3

buse:PaycheckProtectionProgramEconomicAidAct


Paycheck
Period End2021-06-30
Value27
Percentage of PaycheckProtectionProgramLoansAcquiredAmount63.7

buse:PaycheckProtectionProgramLoansOriginated us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

buse:PaycheckProtectionProgramLoansOriginated

buse:PaycheckProtectionProgram


Paycheck
Period End2021-06-30
Value1045
Percentage of PaycheckProtectionProgramLoansOriginated100.0

buse:PaycheckProtectionProgramCaresAct


Paycheck
Period End2021-06-30
Value749
Percentage of PaycheckProtectionProgramLoansOriginated71.7

buse:PaycheckProtectionProgramEconomicAidAct


Paycheck
Period End2021-06-30
Value296
Percentage of PaycheckProtectionProgramLoansOriginated28.3

buse:PercentageOfTrustPreferredSecuritiesQualifiedAsTierOneCapital us-gaap:ScheduleOfSharesSubjectToMandatoryRedemptionBySettlementTerms

buse:PercentageOfTrustPreferredSecuritiesQualifiedAsTierOneCapital

us-gaap:TrustPreferredSecuritiesSubjectToMandatoryRedemption


Percentage
Period End2020-12-31
Value100.0
Percentage of PercentageOfTrustPreferredSecuritiesQualifiedAsTierOneCapital100.0

buse:RealEstateInForeclosure us-gaap:Collateral

buse:RealEstateInForeclosure

us-gaap:ResidentialRealEstate


Real
Period End2020-12-31
Value1000000.0
Percentage of RealEstateInForeclosure100.0

buse:ReserveForUnfundedCommitments

buse:ReserveForUnfundedCommitments


Reserve
Period End2020-09-302020-06-302020-03-312020-01-01
Value7300000.07100000.06500000.05500000.0
Percentage of ReserveForUnfundedCommitments100.0100.0100.0100.0

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue us-gaap:AwardType

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue

buse:MarketBasedPerformanceStockUnits


Share
Period End2021-03-31
Value1700000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue100.0

us-gaap:PerformanceShares


Share
Period End2021-03-31
Value700000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue41.2

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue us-gaap:TitleOfIndividual, us-gaap:AwardType, us-gaap:PlanName

buse:DirectorsAndAdvisoryDirectors, buse:DeferredStockUnits, buse:The2020EquityIncentivePlan


Share
Period End2021-03-24
Value800000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue0.0

buse:ManagementViceChairmanOfBoard, us-gaap:RestrictedStockUnitsRSU, buse:The2020EquityIncentivePlan


Share
Period End2021-03-24
Value5200000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue0.0

srt:Director, buse:DeferredStockUnits, buse:The2020EquityIncentivePlan


Share
Period End2021-05-19
Value100000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodValue0.0

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue us-gaap:AwardType

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue

buse:DeferredStockUnits


Share
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value24.324.3424.4124.4723.423.3622.2727.5722.4222.4121.121.0621.020.4918.6718.618.5418.517.217.1717.16
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312012-06-30
Value23.9323.9728.1327.2127.2627.4626.1326.1322.7822.7222.3421.2118.9618.7817.1417.115.01
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageGrantDateFairValue98.598.2115.0116.3116.7123.394.8116.6108.0107.9109.0113.6101.9101.599.799.70.0

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstandingWeightedAverageGrantDateFairValue us-gaap:AwardType

buse:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstandingWeightedAverageGrantDateFairValue

buse:DeferredStockUnits


Share
Period End2021-06-30
Value24.3
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstandingWeightedAverageGrantDateFairValue100.0

buse:TimeDeposits250000OrMore

buse:TimeDeposits250000OrMore


Time
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-31
Value17115519223428232929730934034826424921722419717875757080232428
Percentage of TimeDeposits250000OrMore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGross

us-gaap:AccountsReceivableGross


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value71856779681471217229674566875568
Percentage of AccountsReceivableGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableGross us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

buse:RealEstateConstruction


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value500422461407433448401288
Percentage of AccountsReceivableGross7.06.26.85.76.06.66.05.2

buse:RetailOther


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value18433374042484928
Percentage of AccountsReceivableGross2.60.50.50.60.60.70.70.5

buse:RetailRealEstate


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value15251343140714801548165616931480
Percentage of AccountsReceivableGross21.219.820.720.821.424.625.326.6

us-gaap:CommercialLoan


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value20542067201422812357176717481405
Percentage of AccountsReceivableGross28.630.529.632.032.626.226.125.2

us-gaap:CommercialRealEstate


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value29202912289229122847282527932366
Percentage of AccountsReceivableGross40.643.042.440.939.441.941.842.5

us-gaap:AccountsReceivableGross us-gaap:FinancingReceivablePortfolioSegment

buse:RetailOther


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1843337404248
Percentage of AccountsReceivableGross2.60.50.50.60.60.7

buse:RetailRealEstate


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value152513431407148015481656
Percentage of AccountsReceivableGross21.219.820.720.821.424.6

us-gaap:CommercialPortfolioSegment


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value205420672014228123571767
Percentage of AccountsReceivableGross28.630.529.632.032.626.2

us-gaap:CommercialRealEstatePortfolioSegment


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value292029122892291228472825
Percentage of AccountsReceivableGross40.643.042.440.939.441.9

us-gaap:ConstructionLoans


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value500422461407433448
Percentage of AccountsReceivableGross7.06.26.85.76.06.6

us-gaap:AccountsReceivableGross us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

buse:RetailOther, us-gaap:Doubtful


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.0410.0980.1040.090.1530.0860.0570.03
Percentage of AccountsReceivableGross0.00.00.00.00.00.00.00.0

buse:RetailOther, us-gaap:Pass


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value18432373942484726
Percentage of AccountsReceivableGross2.60.50.50.60.60.70.70.5

buse:RetailRealEstate, buse:WatchList


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value139.879101012139.1256.425
Percentage of AccountsReceivableGross0.20.10.20.20.20.20.10.1

buse:RetailRealEstate, us-gaap:Doubtful


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value8.2418.4958.7998.4989.2178.9718.9356.698
Percentage of AccountsReceivableGross0.10.10.10.10.10.10.10.1

buse:RetailRealEstate, us-gaap:Pass


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value14961318138214521518162416611448
Percentage of AccountsReceivableGross20.819.420.320.421.024.124.826.0

buse:RetailRealEstate, us-gaap:SpecialMention


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value2.3422.3762.4714.0693.6173.6525.3556.792
Percentage of AccountsReceivableGross0.00.00.00.10.10.10.10.1

buse:RetailRealEstate, us-gaap:Substandard


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4.6724.3023.7024.8484.6136.3877.0015.435
Percentage of AccountsReceivableGross0.10.10.10.10.10.10.10.1

us-gaap:CommercialPortfolioSegment, buse:WatchList


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value131123136145136150172172
Percentage of AccountsReceivableGross1.81.82.02.01.92.22.63.1

us-gaap:CommercialPortfolioSegment, us-gaap:Doubtful


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value107.9498.5237.9126.4367.3929.09617
Percentage of AccountsReceivableGross0.10.10.10.10.10.10.10.3

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value18161830176820112078148114581126
Percentage of AccountsReceivableGross25.327.026.028.228.722.021.820.2

us-gaap:CommercialPortfolioSegment, us-gaap:SpecialMention


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value7678728294856647
Percentage of AccountsReceivableGross1.11.21.11.21.31.31.00.8

us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1927273341424142
Percentage of AccountsReceivableGross0.30.40.40.50.60.60.60.8

us-gaap:CommercialRealEstatePortfolioSegment, buse:WatchList


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value379407383255233178186137
Percentage of AccountsReceivableGross5.36.05.63.63.22.62.82.5

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Doubtful


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value8.7655.1645.5037.1399.0098.9419.17810
Percentage of AccountsReceivableGross0.10.10.10.10.10.10.10.2

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value24462400239325412476250924772106
Percentage of AccountsReceivableGross34.035.435.135.734.337.237.037.8

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:SpecialMention


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value676875719310010585
Percentage of AccountsReceivableGross0.91.01.11.01.31.51.61.5

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1831343734282636
Percentage of AccountsReceivableGross0.30.50.50.50.50.40.40.7

us-gaap:ConstructionLoans, buse:WatchList


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1519242623284514
Percentage of AccountsReceivableGross0.20.30.40.40.30.40.70.3

us-gaap:ConstructionLoans, us-gaap:Doubtful


Accounts
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.0010.2590.280.2820.630.018
Percentage of AccountsReceivableGross0.00.00.00.00.00.0

us-gaap:ConstructionLoans, us-gaap:Pass


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value482400434376405415351268
Percentage of AccountsReceivableGross6.75.96.45.35.66.25.34.8

us-gaap:ConstructionLoans, us-gaap:SpecialMention


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.0080.0090.0770.6030.6853.2223.9283.899
Percentage of AccountsReceivableGross0.00.00.00.00.00.00.10.1

us-gaap:ConstructionLoans, us-gaap:Substandard


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value2.42.42.5462.7972.8320.6990.7371.888
Percentage of AccountsReceivableGross0.00.00.00.00.00.00.00.0

us-gaap:AccountsReceivableGross us-gaap:InternalCreditAssessment

buse:WatchList


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value540560554439406370413330
Percentage of AccountsReceivableGross7.58.38.16.25.65.56.25.9

us-gaap:Doubtful


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value2721222325252734
Percentage of AccountsReceivableGross0.40.30.30.30.30.40.40.6

us-gaap:Pass