10-Q 1 bku-20220930.htm 10-Q bku-20220930
000150400812/312022Q3false00015040082022-01-012022-09-300001504008exch:XNYS2022-01-012022-09-3000015040082022-10-31xbrli:shares00015040082022-09-30iso4217:USD00015040082021-12-310001504008us-gaap:LoansMember2022-09-300001504008us-gaap:LoansMember2021-12-31iso4217:USDxbrli:shares00015040082022-07-012022-09-3000015040082021-07-012021-09-3000015040082021-01-012021-09-3000015040082020-12-3100015040082021-09-300001504008us-gaap:CommonStockMember2022-06-300001504008us-gaap:AdditionalPaidInCapitalMember2022-06-300001504008us-gaap:RetainedEarningsMember2022-06-300001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-06-3000015040082022-06-300001504008us-gaap:CommonStockMember2022-07-012022-09-300001504008us-gaap:AdditionalPaidInCapitalMember2022-07-012022-09-300001504008us-gaap:RetainedEarningsMember2022-07-012022-09-300001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-07-012022-09-300001504008us-gaap:CommonStockMember2022-09-300001504008us-gaap:AdditionalPaidInCapitalMember2022-09-300001504008us-gaap:RetainedEarningsMember2022-09-300001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-09-300001504008us-gaap:CommonStockMember2021-06-300001504008us-gaap:AdditionalPaidInCapitalMember2021-06-300001504008us-gaap:RetainedEarningsMember2021-06-300001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-06-3000015040082021-06-300001504008us-gaap:CommonStockMember2021-07-012021-09-300001504008us-gaap:AdditionalPaidInCapitalMember2021-07-012021-09-300001504008us-gaap:RetainedEarningsMember2021-07-012021-09-300001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-07-012021-09-300001504008us-gaap:CommonStockMember2021-09-300001504008us-gaap:AdditionalPaidInCapitalMember2021-09-300001504008us-gaap:RetainedEarningsMember2021-09-300001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-09-300001504008us-gaap:CommonStockMember2021-12-310001504008us-gaap:AdditionalPaidInCapitalMember2021-12-310001504008us-gaap:RetainedEarningsMember2021-12-310001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-12-310001504008us-gaap:CommonStockMember2022-01-012022-09-300001504008us-gaap:AdditionalPaidInCapitalMember2022-01-012022-09-300001504008us-gaap:RetainedEarningsMember2022-01-012022-09-300001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2022-01-012022-09-300001504008us-gaap:CommonStockMember2020-12-310001504008us-gaap:AdditionalPaidInCapitalMember2020-12-310001504008us-gaap:RetainedEarningsMember2020-12-310001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2020-12-310001504008us-gaap:CommonStockMember2021-01-012021-09-300001504008us-gaap:AdditionalPaidInCapitalMember2021-01-012021-09-300001504008us-gaap:RetainedEarningsMember2021-01-012021-09-300001504008us-gaap:AccumulatedOtherComprehensiveIncomeMember2021-01-012021-09-300001504008stpr:FL2022-09-30bku:banking_centerbku:county0001504008stpr:NY2022-09-300001504008stpr:TX2022-09-300001504008us-gaap:USTreasurySecuritiesMember2022-09-300001504008bku:USGovernmentagencyandsponsoredenterpriseresidentialmortgagebackedsecuritiesMember2022-09-300001504008bku:UsGovernmentSponsoredEnterprisesDebtSecuritiesCommercialMember2022-09-300001504008us-gaap:ResidentialMortgageBackedSecuritiesMember2022-09-300001504008us-gaap:CommercialMortgageBackedSecuritiesMember2022-09-300001504008bku:SinglefamilyrentalrealestatebackedsecuritiesMember2022-09-300001504008us-gaap:CollateralizedLoanObligationsMember2022-09-300001504008bku:NonMortgageAssetBackedSecuritiesMember2022-09-300001504008us-gaap:USStatesAndPoliticalSubdivisionsMember2022-09-300001504008bku:SmallBusinessAdministrationSecuritiesMember2022-09-300001504008us-gaap:DebtSecuritiesMember2022-09-300001504008us-gaap:EquitySecuritiesMember2022-09-300001504008us-gaap:USTreasurySecuritiesMember2021-12-310001504008bku:USGovernmentagencyandsponsoredenterpriseresidentialmortgagebackedsecuritiesMember2021-12-310001504008bku:UsGovernmentSponsoredEnterprisesDebtSecuritiesCommercialMember2021-12-310001504008us-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001504008us-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001504008bku:SinglefamilyrentalrealestatebackedsecuritiesMember2021-12-310001504008us-gaap:CollateralizedLoanObligationsMember2021-12-310001504008bku:NonMortgageAssetBackedSecuritiesMember2021-12-310001504008us-gaap:USStatesAndPoliticalSubdivisionsMember2021-12-310001504008bku:SmallBusinessAdministrationSecuritiesMember2021-12-310001504008us-gaap:DebtSecuritiesMember2021-12-310001504008us-gaap:EquitySecuritiesMember2021-12-31bku:bond0001504008us-gaap:AvailableforsaleSecuritiesMember2022-09-300001504008us-gaap:AvailableforsaleSecuritiesMember2021-12-31bku:securitybku:rental0001504008us-gaap:ResidentialMortgageBackedSecuritiesMember2022-01-012022-09-30xbrli:pure0001504008us-gaap:CommercialMortgageBackedSecuritiesMember2022-01-012022-09-300001504008bku:SinglefamilyrentalrealestatebackedsecuritiesMember2022-01-012022-09-300001504008us-gaap:CollateralizedLoanObligationsMember2022-01-012022-09-300001504008bku:NonMortgageAssetBackedSecuritiesMember2022-01-012022-09-300001504008us-gaap:USStatesAndPoliticalSubdivisionsMember2022-01-012022-09-300001504008bku:OneToFourSingleFamilyResidentialMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMember2021-12-310001504008bku:GovernmentInsuredResidentialMember2022-09-300001504008bku:GovernmentInsuredResidentialMember2021-12-310001504008bku:ConsumerloanandhomeequitylineofcreditMember2022-09-300001504008bku:ConsumerloanandhomeequitylineofcreditMember2021-12-310001504008us-gaap:ResidentialPortfolioSegmentMember2022-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2021-12-310001504008srt:MultifamilyMember2022-09-300001504008srt:MultifamilyMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMember2021-12-310001504008bku:ConstructionLandMember2022-09-300001504008bku:ConstructionLandMember2021-12-310001504008bku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008bku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008bku:CommercialAndIndustrialMember2022-09-300001504008bku:CommercialAndIndustrialMember2021-12-310001504008bku:PaymentProtectionPlanMember2022-09-300001504008bku:PaymentProtectionPlanMember2021-12-310001504008bku:PinnaclePublicFinanceMember2022-09-300001504008bku:PinnaclePublicFinanceMember2021-12-310001504008bku:BridgefranchisefinanceMember2022-09-300001504008bku:BridgefranchisefinanceMember2021-12-310001504008bku:BridgeequipmentfinanceMember2022-09-300001504008bku:BridgeequipmentfinanceMember2021-12-310001504008bku:MortgagewarehouselendingMember2022-09-300001504008bku:MortgagewarehouselendingMember2021-12-310001504008us-gaap:CommercialPortfolioSegmentMember2022-09-300001504008us-gaap:CommercialPortfolioSegmentMember2021-12-310001504008us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember2022-09-300001504008us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember2021-12-310001504008us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember2022-01-012022-09-300001504008us-gaap:FinancialAssetAcquiredWithCreditDeteriorationMember2021-01-012021-12-310001504008bku:OneToFourSingleFamilyResidentialMember2022-07-012022-09-300001504008bku:OneToFourSingleFamilyResidentialMember2022-01-012022-09-300001504008bku:OneToFourSingleFamilyResidentialMember2021-07-012021-09-300001504008bku:OneToFourSingleFamilyResidentialMember2021-01-012021-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2022-06-300001504008us-gaap:CommercialPortfolioSegmentMember2022-06-300001504008us-gaap:ResidentialPortfolioSegmentMember2021-06-300001504008us-gaap:CommercialPortfolioSegmentMember2021-06-300001504008bku:FundedLoansMemberus-gaap:ResidentialPortfolioSegmentMember2022-07-012022-09-300001504008bku:FundedLoansMemberus-gaap:CommercialPortfolioSegmentMember2022-07-012022-09-300001504008bku:FundedLoansMember2022-07-012022-09-300001504008bku:FundedLoansMemberus-gaap:ResidentialPortfolioSegmentMember2021-07-012021-09-300001504008bku:FundedLoansMemberus-gaap:CommercialPortfolioSegmentMember2021-07-012021-09-300001504008bku:FundedLoansMember2021-07-012021-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2022-07-012022-09-300001504008us-gaap:CommercialPortfolioSegmentMember2022-07-012022-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2021-07-012021-09-300001504008us-gaap:CommercialPortfolioSegmentMember2021-07-012021-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2022-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2021-09-300001504008us-gaap:CommercialPortfolioSegmentMember2021-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2021-12-310001504008us-gaap:ResidentialPortfolioSegmentMember2020-12-310001504008us-gaap:CommercialPortfolioSegmentMember2020-12-310001504008bku:FundedLoansMemberus-gaap:ResidentialPortfolioSegmentMember2022-01-012022-09-300001504008bku:FundedLoansMemberus-gaap:CommercialPortfolioSegmentMember2022-01-012022-09-300001504008bku:FundedLoansMember2022-01-012022-09-300001504008bku:FundedLoansMemberus-gaap:ResidentialPortfolioSegmentMember2021-01-012021-09-300001504008bku:FundedLoansMemberus-gaap:CommercialPortfolioSegmentMember2021-01-012021-09-300001504008bku:FundedLoansMember2021-01-012021-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2022-01-012022-09-300001504008us-gaap:CommercialPortfolioSegmentMember2022-01-012022-09-300001504008us-gaap:ResidentialPortfolioSegmentMember2021-01-012021-09-300001504008us-gaap:CommercialPortfolioSegmentMember2021-01-012021-09-300001504008bku:AccruedInterestReceivableMember2022-07-012022-09-300001504008bku:AccruedInterestReceivableMember2021-07-012021-09-300001504008bku:AccruedInterestReceivableMember2022-01-012022-09-300001504008bku:AccruedInterestReceivableMember2021-01-012021-09-300001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancingReceivables1To29DaysPastDueMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancingReceivables1To29DaysPastDueMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberbku:LoantoValueSixtyPercentOneorLessMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberbku:LoantoValueSixtyPercentonetoSeventyPercentMemberMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberbku:A7180Member2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberbku:LoanToValueEightyPercentOrMoreMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberbku:LoantoValueSixtyPercentOneorLessMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberbku:LoantoValueSixtyPercentonetoSeventyPercentMemberMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberbku:A7180Member2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberbku:LoanToValueEightyPercentOrMoreMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberbku:FICOScore760orGreaterMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberbku:FICOScore720to759Member2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberbku:FICOScore719orLessMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberbku:FICOScore760orGreaterMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberbku:FICOScore720to759Member2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberbku:FICOScore719orLessMember2021-12-310001504008srt:MinimumMemberus-gaap:CommercialPortfolioSegmentMember2022-09-300001504008srt:MaximumMemberus-gaap:CommercialPortfolioSegmentMember2022-09-300001504008us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:PassMember2022-09-300001504008us-gaap:SpecialMentionMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2022-09-300001504008us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:SubstandardMember2022-09-300001504008us-gaap:CommercialRealEstatePortfolioSegmentMember2022-09-300001504008bku:CommercialAndIndustrialPortfolioSegmentMemberus-gaap:PassMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:CommercialAndIndustrialPortfolioSegmentMember2022-09-300001504008bku:CommercialAndIndustrialPortfolioSegmentMemberus-gaap:SubstandardMember2022-09-300001504008bku:CommercialAndIndustrialPortfolioSegmentMemberus-gaap:DoubtfulMember2022-09-300001504008bku:CommercialAndIndustrialPortfolioSegmentMember2022-09-300001504008us-gaap:PassMemberbku:PinnaclePublicFinanceMember2022-09-300001504008bku:BridgeequipmentfinanceMemberus-gaap:PassMember2022-09-300001504008bku:BridgeequipmentfinanceMemberus-gaap:SubstandardMember2022-09-300001504008us-gaap:PassMemberbku:BridgefranchisefinanceMember2022-09-300001504008us-gaap:SubstandardMemberbku:BridgefranchisefinanceMember2022-09-300001504008us-gaap:DoubtfulMemberbku:BridgefranchisefinanceMember2022-09-300001504008bku:MortgagewarehouselendingMemberus-gaap:PassMember2022-09-300001504008us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:PassMember2021-12-310001504008us-gaap:SpecialMentionMemberus-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001504008us-gaap:CommercialRealEstatePortfolioSegmentMemberus-gaap:SubstandardMember2021-12-310001504008us-gaap:CommercialRealEstatePortfolioSegmentMember2021-12-310001504008bku:CommercialAndIndustrialPortfolioSegmentMemberus-gaap:PassMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:CommercialAndIndustrialPortfolioSegmentMember2021-12-310001504008bku:CommercialAndIndustrialPortfolioSegmentMemberus-gaap:SubstandardMember2021-12-310001504008bku:CommercialAndIndustrialPortfolioSegmentMemberus-gaap:DoubtfulMember2021-12-310001504008bku:CommercialAndIndustrialPortfolioSegmentMember2021-12-310001504008us-gaap:PassMemberbku:PinnaclePublicFinanceMember2021-12-310001504008bku:BridgeequipmentfinanceMemberus-gaap:PassMember2021-12-310001504008bku:BridgeequipmentfinanceMemberus-gaap:SubstandardMember2021-12-310001504008us-gaap:PassMemberbku:BridgefranchisefinanceMember2021-12-310001504008us-gaap:SubstandardMemberbku:BridgefranchisefinanceMember2021-12-310001504008us-gaap:DoubtfulMemberbku:BridgefranchisefinanceMember2021-12-310001504008bku:MortgagewarehouselendingMemberus-gaap:PassMember2021-12-310001504008srt:MultifamilyMemberus-gaap:PassMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:PassMember2022-09-300001504008bku:ConstructionLandMemberus-gaap:PassMember2022-09-300001504008us-gaap:PassMemberbku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008us-gaap:PassMemberbku:CommercialAndIndustrialMember2022-09-300001504008bku:PaymentProtectionPlanMemberus-gaap:PassMember2022-09-300001504008us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2022-09-300001504008us-gaap:SpecialMentionMembersrt:MultifamilyMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:CommercialRealEstateNonOwnerOccupiedMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:ConstructionLandMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:CommercialAndIndustrialMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:PaymentProtectionPlanMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:PinnaclePublicFinanceMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:BridgefranchisefinanceMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:BridgeequipmentfinanceMember2022-09-300001504008us-gaap:SpecialMentionMemberbku:MortgagewarehouselendingMember2022-09-300001504008us-gaap:SpecialMentionMemberus-gaap:CommercialPortfolioSegmentMember2022-09-300001504008srt:MultifamilyMemberbku:SubstandardAccruingMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMemberbku:SubstandardAccruingMember2022-09-300001504008bku:ConstructionLandMemberbku:SubstandardAccruingMember2022-09-300001504008bku:CommercialRealEstateOwnerOccupiedMemberbku:SubstandardAccruingMember2022-09-300001504008bku:CommercialAndIndustrialMemberbku:SubstandardAccruingMember2022-09-300001504008bku:PaymentProtectionPlanMemberbku:SubstandardAccruingMember2022-09-300001504008bku:PinnaclePublicFinanceMemberbku:SubstandardAccruingMember2022-09-300001504008bku:BridgefranchisefinanceMemberbku:SubstandardAccruingMember2022-09-300001504008bku:BridgeequipmentfinanceMemberbku:SubstandardAccruingMember2022-09-300001504008bku:MortgagewarehouselendingMemberbku:SubstandardAccruingMember2022-09-300001504008us-gaap:CommercialPortfolioSegmentMemberbku:SubstandardAccruingMember2022-09-300001504008srt:MultifamilyMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:ConstructionLandMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:CommercialRealEstateOwnerOccupiedMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:CommercialAndIndustrialMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:PaymentProtectionPlanMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:PinnaclePublicFinanceMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:BridgefranchisefinanceMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:BridgeequipmentfinanceMemberbku:SubstandardNonAccruingMember2022-09-300001504008bku:MortgagewarehouselendingMemberbku:SubstandardNonAccruingMember2022-09-300001504008us-gaap:CommercialPortfolioSegmentMemberbku:SubstandardNonAccruingMember2022-09-300001504008srt:MultifamilyMemberus-gaap:DoubtfulMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:DoubtfulMember2022-09-300001504008bku:ConstructionLandMemberus-gaap:DoubtfulMember2022-09-300001504008us-gaap:DoubtfulMemberbku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008us-gaap:DoubtfulMemberbku:CommercialAndIndustrialMember2022-09-300001504008bku:PaymentProtectionPlanMemberus-gaap:DoubtfulMember2022-09-300001504008us-gaap:DoubtfulMemberbku:PinnaclePublicFinanceMember2022-09-300001504008bku:BridgeequipmentfinanceMemberus-gaap:DoubtfulMember2022-09-300001504008bku:MortgagewarehouselendingMemberus-gaap:DoubtfulMember2022-09-300001504008us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMember2022-09-300001504008us-gaap:CommercialPortfolioSegmentMember2022-09-300001504008srt:MultifamilyMemberus-gaap:PassMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:PassMember2021-12-310001504008bku:ConstructionLandMemberus-gaap:PassMember2021-12-310001504008us-gaap:PassMemberbku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008us-gaap:PassMemberbku:CommercialAndIndustrialMember2021-12-310001504008bku:PaymentProtectionPlanMemberus-gaap:PassMember2021-12-310001504008us-gaap:CommercialPortfolioSegmentMemberus-gaap:PassMember2021-12-310001504008us-gaap:SpecialMentionMembersrt:MultifamilyMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:CommercialRealEstateNonOwnerOccupiedMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:ConstructionLandMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:CommercialAndIndustrialMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:PaymentProtectionPlanMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:PinnaclePublicFinanceMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:BridgefranchisefinanceMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:BridgeequipmentfinanceMember2021-12-310001504008us-gaap:SpecialMentionMemberbku:MortgagewarehouselendingMember2021-12-310001504008us-gaap:SpecialMentionMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001504008srt:MultifamilyMemberbku:SubstandardAccruingMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMemberbku:SubstandardAccruingMember2021-12-310001504008bku:ConstructionLandMemberbku:SubstandardAccruingMember2021-12-310001504008bku:CommercialRealEstateOwnerOccupiedMemberbku:SubstandardAccruingMember2021-12-310001504008bku:CommercialAndIndustrialMemberbku:SubstandardAccruingMember2021-12-310001504008bku:PaymentProtectionPlanMemberbku:SubstandardAccruingMember2021-12-310001504008bku:PinnaclePublicFinanceMemberbku:SubstandardAccruingMember2021-12-310001504008bku:BridgefranchisefinanceMemberbku:SubstandardAccruingMember2021-12-310001504008bku:BridgeequipmentfinanceMemberbku:SubstandardAccruingMember2021-12-310001504008bku:MortgagewarehouselendingMemberbku:SubstandardAccruingMember2021-12-310001504008us-gaap:CommercialPortfolioSegmentMemberbku:SubstandardAccruingMember2021-12-310001504008srt:MultifamilyMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:ConstructionLandMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:CommercialRealEstateOwnerOccupiedMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:CommercialAndIndustrialMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:PaymentProtectionPlanMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:PinnaclePublicFinanceMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:BridgefranchisefinanceMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:BridgeequipmentfinanceMemberbku:SubstandardNonAccruingMember2021-12-310001504008bku:MortgagewarehouselendingMemberbku:SubstandardNonAccruingMember2021-12-310001504008us-gaap:CommercialPortfolioSegmentMemberbku:SubstandardNonAccruingMember2021-12-310001504008srt:MultifamilyMemberus-gaap:DoubtfulMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:DoubtfulMember2021-12-310001504008bku:ConstructionLandMemberus-gaap:DoubtfulMember2021-12-310001504008us-gaap:DoubtfulMemberbku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008us-gaap:DoubtfulMemberbku:CommercialAndIndustrialMember2021-12-310001504008bku:PaymentProtectionPlanMemberus-gaap:DoubtfulMember2021-12-310001504008us-gaap:DoubtfulMemberbku:PinnaclePublicFinanceMember2021-12-310001504008bku:BridgeequipmentfinanceMemberus-gaap:DoubtfulMember2021-12-310001504008bku:MortgagewarehouselendingMemberus-gaap:DoubtfulMember2021-12-310001504008us-gaap:CommercialPortfolioSegmentMemberus-gaap:DoubtfulMember2021-12-310001504008us-gaap:CommercialPortfolioSegmentMember2021-12-310001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancialAssetNotPastDueMember2022-09-300001504008bku:OneToFourSingleFamilyResidentialMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberus-gaap:UsGovernmentAgencyInsuredLoansMember2022-09-300001504008us-gaap:UsGovernmentAgencyInsuredLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008us-gaap:UsGovernmentAgencyInsuredLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-09-300001504008us-gaap:UsGovernmentAgencyInsuredLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008us-gaap:UsGovernmentAgencyInsuredLoansMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberus-gaap:UsGovernmentAgencyInsuredLoansMember2021-12-310001504008us-gaap:UsGovernmentAgencyInsuredLoansMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008us-gaap:UsGovernmentAgencyInsuredLoansMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001504008us-gaap:UsGovernmentAgencyInsuredLoansMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008us-gaap:UsGovernmentAgencyInsuredLoansMember2021-12-310001504008us-gaap:ConsumerLoanMemberus-gaap:FinancialAssetNotPastDueMember2022-09-300001504008us-gaap:ConsumerLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008us-gaap:ConsumerLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-09-300001504008us-gaap:ConsumerLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008us-gaap:ConsumerLoanMember2022-09-300001504008us-gaap:ConsumerLoanMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001504008us-gaap:ConsumerLoanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008us-gaap:ConsumerLoanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001504008us-gaap:ConsumerLoanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008us-gaap:ConsumerLoanMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMembersrt:MultifamilyMember2022-09-300001504008srt:MultifamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008us-gaap:FinancingReceivables60To89DaysPastDueMembersrt:MultifamilyMember2022-09-300001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:MultifamilyMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMembersrt:MultifamilyMember2021-12-310001504008srt:MultifamilyMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008us-gaap:FinancingReceivables60To89DaysPastDueMembersrt:MultifamilyMember2021-12-310001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMembersrt:MultifamilyMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberbku:CommercialRealEstateNonOwnerOccupiedMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberbku:CommercialRealEstateNonOwnerOccupiedMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberbku:ConstructionLandMember2022-09-300001504008bku:ConstructionLandMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008bku:ConstructionLandMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-09-300001504008bku:ConstructionLandMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberbku:ConstructionLandMember2021-12-310001504008bku:ConstructionLandMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008bku:ConstructionLandMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001504008bku:ConstructionLandMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberbku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008us-gaap:FinancingReceivables30To59DaysPastDueMemberbku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberbku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberbku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008us-gaap:FinancingReceivables30To59DaysPastDueMemberbku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberbku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberbku:CommercialAndIndustrialMember2022-09-300001504008bku:CommercialAndIndustrialMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:CommercialAndIndustrialMember2022-09-300001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberbku:CommercialAndIndustrialMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberbku:CommercialAndIndustrialMember2021-12-310001504008bku:CommercialAndIndustrialMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:CommercialAndIndustrialMember2021-12-310001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberbku:CommercialAndIndustrialMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberbku:PaymentProtectionPlanMember2022-09-300001504008bku:PaymentProtectionPlanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008bku:PaymentProtectionPlanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-09-300001504008bku:PaymentProtectionPlanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberbku:PaymentProtectionPlanMember2021-12-310001504008bku:PaymentProtectionPlanMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008bku:PaymentProtectionPlanMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001504008bku:PaymentProtectionPlanMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberbku:PinnaclePublicFinanceMember2022-09-300001504008bku:PinnaclePublicFinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:PinnaclePublicFinanceMember2022-09-300001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberbku:PinnaclePublicFinanceMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberbku:PinnaclePublicFinanceMember2021-12-310001504008bku:PinnaclePublicFinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:PinnaclePublicFinanceMember2021-12-310001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberbku:PinnaclePublicFinanceMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberbku:BridgefranchisefinanceMember2022-09-300001504008bku:BridgefranchisefinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:BridgefranchisefinanceMember2022-09-300001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberbku:BridgefranchisefinanceMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberbku:BridgefranchisefinanceMember2021-12-310001504008bku:BridgefranchisefinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:BridgefranchisefinanceMember2021-12-310001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMemberbku:BridgefranchisefinanceMember2021-12-310001504008bku:BridgeequipmentfinanceMemberus-gaap:FinancialAssetNotPastDueMember2022-09-300001504008bku:BridgeequipmentfinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008bku:BridgeequipmentfinanceMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2022-09-300001504008bku:BridgeequipmentfinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008bku:BridgeequipmentfinanceMemberus-gaap:FinancialAssetNotPastDueMember2021-12-310001504008bku:BridgeequipmentfinanceMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008bku:BridgeequipmentfinanceMemberus-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001504008bku:BridgeequipmentfinanceMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMemberbku:MortgagewarehouselendingMember2022-09-300001504008bku:MortgagewarehouselendingMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:MortgagewarehouselendingMember2022-09-300001504008bku:MortgagewarehouselendingMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMemberbku:MortgagewarehouselendingMember2021-12-310001504008bku:MortgagewarehouselendingMemberus-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008us-gaap:FinancingReceivables60To89DaysPastDueMemberbku:MortgagewarehouselendingMember2021-12-310001504008bku:MortgagewarehouselendingMemberus-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008us-gaap:FinancialAssetNotPastDueMember2022-09-300001504008us-gaap:FinancingReceivables30To59DaysPastDueMember2022-09-300001504008us-gaap:FinancingReceivables60To89DaysPastDueMember2022-09-300001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2022-09-300001504008us-gaap:FinancialAssetNotPastDueMember2021-12-310001504008us-gaap:FinancingReceivables30To59DaysPastDueMember2021-12-310001504008us-gaap:FinancingReceivables60To89DaysPastDueMember2021-12-310001504008us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDueMember2021-12-310001504008bku:SmallbusinessfinanceMember2022-09-300001504008bku:SmallbusinessfinanceMember2021-12-310001504008us-gaap:ResidentialPortfolioSegmentMemberus-gaap:ResidentialRealEstateMember2022-09-300001504008us-gaap:ResidentialPortfolioSegmentMemberus-gaap:ResidentialRealEstateMember2021-12-310001504008us-gaap:CommercialRealEstateMembersrt:MultifamilyMember2022-09-300001504008us-gaap:CommercialRealEstateMembersrt:MultifamilyMember2021-12-310001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:CommercialRealEstateMember2022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMemberus-gaap:CommercialRealEstateMember2021-12-310001504008bku:ConstructionLandMemberus-gaap:CommercialRealEstateMember2022-09-300001504008bku:ConstructionLandMemberus-gaap:CommercialRealEstateMember2021-12-310001504008us-gaap:CommercialRealEstateMemberbku:CommercialRealEstateOwnerOccupiedMember2022-09-300001504008us-gaap:CommercialRealEstateMemberbku:CommercialRealEstateOwnerOccupiedMember2021-12-310001504008us-gaap:CommercialRealEstateMemberbku:CommercialAndIndustrialMember2022-09-300001504008us-gaap:CommercialRealEstateMemberbku:CommercialAndIndustrialMember2021-12-310001504008us-gaap:EquipmentMemberbku:BridgefranchisefinanceMember2022-09-300001504008us-gaap:EquipmentMemberbku:BridgefranchisefinanceMember2021-12-310001504008us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2022-09-300001504008us-gaap:CommercialRealEstateMemberus-gaap:CommercialPortfolioSegmentMember2021-12-310001504008us-gaap:SecuredDebtMember2022-09-300001504008us-gaap:SecuredDebtMember2021-12-310001504008us-gaap:UsGovernmentAgencyInsuredLoansMember2022-07-012022-09-300001504008us-gaap:UsGovernmentAgencyInsuredLoansMember2021-07-012021-09-300001504008bku:CommercialRealEstateOwnerOccupiedMember2022-07-012022-09-300001504008bku:CommercialRealEstateOwnerOccupiedMember2021-07-012021-09-300001504008bku:CommercialAndIndustrialMember2022-07-012022-09-300001504008bku:CommercialAndIndustrialMember2021-07-012021-09-300001504008bku:BridgefranchisefinanceMember2022-07-012022-09-300001504008bku:BridgefranchisefinanceMember2021-07-012021-09-300001504008us-gaap:UsGovernmentAgencyInsuredLoansMember2022-01-012022-09-300001504008us-gaap:UsGovernmentAgencyInsuredLoansMember2021-01-012021-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMember2022-01-012022-09-300001504008bku:CommercialRealEstateNonOwnerOccupiedMember2021-01-012021-09-300001504008bku:CommercialRealEstateOwnerOccupiedMember2022-01-012022-09-300001504008bku:CommercialRealEstateOwnerOccupiedMember2021-01-012021-09-300001504008bku:CommercialAndIndustrialMember2022-01-012022-09-300001504008bku:CommercialAndIndustrialMember2021-01-012021-09-300001504008bku:BridgefranchisefinanceMember2022-01-012022-09-300001504008bku:BridgefranchisefinanceMember2021-01-012021-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberbku:PayfixedinterestrateswapsMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberbku:PayfixedinterestrateswapsMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:CashFlowHedgingMember2022-01-012022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberbku:PayfixedinterestrateswapsMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberbku:PayfixedinterestrateswapsMemberus-gaap:OtherLiabilitiesMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberbku:PayfixedinterestrateswapsMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberbku:PayfixedinterestrateswapsMemberus-gaap:CashFlowHedgingMember2022-01-012022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberbku:PayfixedinterestrateswapsMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberbku:PayfixedinterestrateswapsMemberus-gaap:OtherLiabilitiesMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberbku:PayfixedinterestrateswapsMemberus-gaap:FederalFundsEffectiveSwapRateMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberbku:PayfixedinterestrateswapsMemberus-gaap:FederalFundsEffectiveSwapRateMemberus-gaap:CashFlowHedgingMember2022-01-012022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberbku:PayfixedinterestrateswapsMemberus-gaap:FederalFundsEffectiveSwapRateMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberbku:PayfixedinterestrateswapsMemberus-gaap:OtherLiabilitiesMemberus-gaap:FederalFundsEffectiveSwapRateMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestRateCapMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestRateCapMemberus-gaap:CashFlowHedgingMember2022-01-012022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberus-gaap:InterestRateCapMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMemberus-gaap:InterestRateCapMemberus-gaap:CashFlowHedgingMember2022-09-300001504008bku:InterestRateCollarMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:CashFlowHedgingMember2022-09-300001504008bku:InterestRateCollarMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember2022-09-300001504008bku:InterestRateCollarMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:CashFlowHedgingMember2022-01-012022-09-300001504008bku:InterestRateCollarMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:CashFlowHedgingMember2022-09-300001504008bku:InterestRateCollarMemberus-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:OtherLiabilitiesMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:InterestRateSwapMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:InterestRateSwapMember2022-01-012022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberus-gaap:FairValueHedgingMemberus-gaap:InterestRateSwapMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:FairValueHedgingMemberus-gaap:OtherLiabilitiesMemberus-gaap:InterestRateSwapMember2022-09-300001504008bku:PayfixedinterestrateswapsMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:NondesignatedMember2022-09-300001504008bku:PayfixedinterestrateswapsMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:NondesignatedMember2022-01-012022-09-300001504008bku:PayfixedinterestrateswapsMemberus-gaap:NondesignatedMember2022-09-300001504008us-gaap:OtherAssetsMemberbku:PayfixedinterestrateswapsMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:NondesignatedMember2022-09-300001504008bku:PayfixedinterestrateswapsMemberus-gaap:OtherLiabilitiesMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:NondesignatedMember2022-09-300001504008us-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-09-300001504008us-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-01-012022-09-300001504008us-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-09-300001504008us-gaap:OtherAssetsMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-09-300001504008us-gaap:OtherLiabilitiesMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-09-300001504008us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberbku:PayfixedinterestrateswapsMemberus-gaap:NondesignatedMember2022-09-300001504008us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberbku:PayfixedinterestrateswapsMemberus-gaap:NondesignatedMember2022-01-012022-09-300001504008us-gaap:OtherAssetsMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberbku:PayfixedinterestrateswapsMemberus-gaap:NondesignatedMember2022-09-300001504008us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberbku:PayfixedinterestrateswapsMemberus-gaap:OtherLiabilitiesMemberus-gaap:NondesignatedMember2022-09-300001504008us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-09-300001504008us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-01-012022-09-300001504008us-gaap:OtherAssetsMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-09-300001504008us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:OtherLiabilitiesMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2022-09-300001504008bku:InterestRateCapsPurchasedIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2022-09-300001504008bku:InterestRateCapsPurchasedIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2022-01-012022-09-300001504008us-gaap:OtherAssetsMemberbku:InterestRateCapsPurchasedIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2022-09-300001504008us-gaap:OtherLiabilitiesMemberbku:InterestRateCapsPurchasedIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2022-09-300001504008bku:InterestRateCapsSoldIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2022-09-300001504008bku:InterestRateCapsSoldIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2022-01-012022-09-300001504008us-gaap:OtherAssetsMemberbku:InterestRateCapsSoldIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2022-09-300001504008bku:InterestRateCapsSoldIndexedTo1MonthLiborMemberus-gaap:OtherLiabilitiesMemberus-gaap:NondesignatedMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:InterestRateFloorMemberus-gaap:CashFlowHedgingMember2022-09-300001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMember2021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMember2021-01-012021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMember2021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMemberus-gaap:LondonInterbankOfferedRateLIBORMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMember2021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestRateSwapMemberus-gaap:FederalFundsEffectiveSwapRateMemberus-gaap:CashFlowHedgingMember2021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMemberus-gaap:InterestRateSwapMemberus-gaap:CashFlowHedgingMember2021-01-012021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberus-gaap:InterestRateSwapMemberus-gaap:FederalFundsEffectiveSwapRateMemberus-gaap:CashFlowHedgingMember2021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMemberus-gaap:InterestRateSwapMemberus-gaap:FederalFundsEffectiveSwapRateMemberus-gaap:CashFlowHedgingMember2021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestRateCapMemberus-gaap:CashFlowHedgingMember2021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:InterestRateCapMemberus-gaap:CashFlowHedgingMember2021-01-012021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherAssetsMemberus-gaap:InterestRateCapMemberus-gaap:CashFlowHedgingMember2021-12-310001504008us-gaap:DesignatedAsHedgingInstrumentMemberus-gaap:OtherLiabilitiesMemberus-gaap:InterestRateCapMemberus-gaap:CashFlowHedgingMember2021-12-310001504008bku:PayfixedinterestrateswapsMemberus-gaap:NondesignatedMember2021-12-310001504008bku:PayfixedinterestrateswapsMemberus-gaap:NondesignatedMember2021-01-012021-12-310001504008us-gaap:OtherAssetsMemberbku:PayfixedinterestrateswapsMemberus-gaap:NondesignatedMember2021-12-310001504008bku:PayfixedinterestrateswapsMemberus-gaap:OtherLiabilitiesMemberus-gaap:NondesignatedMember2021-12-310001504008us-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2021-12-310001504008us-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2021-01-012021-12-310001504008us-gaap:OtherAssetsMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2021-12-310001504008us-gaap:OtherLiabilitiesMemberus-gaap:NondesignatedMemberbku:PayvariableinterestrateswapsMember2021-12-310001504008bku:InterestRateCapsPurchasedIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2021-12-310001504008bku:InterestRateCapsPurchasedIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2021-01-012021-12-310001504008us-gaap:OtherAssetsMemberbku:InterestRateCapsPurchasedIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2021-12-310001504008us-gaap:OtherLiabilitiesMemberbku:InterestRateCapsPurchasedIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2021-12-310001504008bku:InterestRateCapsSoldIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2021-12-310001504008bku:InterestRateCapsSoldIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2021-01-012021-12-310001504008us-gaap:OtherAssetsMemberbku:InterestRateCapsSoldIndexedTo1MonthLiborMemberus-gaap:NondesignatedMember2021-12-310001504008bku:InterestRateCapsSoldIndexedTo1MonthLiborMemberus-gaap:OtherLiabilitiesMemberus-gaap:NondesignatedMember2021-12-310001504008us-gaap:BorrowingsMember2022-07-012022-09-300001504008us-gaap:BorrowingsMember2021-07-012021-09-300001504008us-gaap:BorrowingsMember2022-01-012022-09-300001504008us-gaap:BorrowingsMember2021-01-012021-09-300001504008us-gaap:DepositsMember2022-07-012022-09-300001504008us-gaap:DepositsMember2021-07-012021-09-300001504008us-gaap:DepositsMember2022-01-012022-09-300001504008us-gaap:DepositsMember2021-01-012021-09-300001504008us-gaap:InterestIncomeMember2022-07-012022-09-300001504008us-gaap:InterestIncomeMember2021-07-012021-09-300001504008us-gaap:InterestIncomeMember2022-01-012022-09-300001504008us-gaap:InterestIncomeMember2021-01-012021-09-300001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-06-300001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-06-300001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-07-012022-09-300001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-07-012022-09-300001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-09-300001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-09-300001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-06-300001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-06-300001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-07-012021-09-300001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-07-012021-09-300001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-09-300001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-09-300001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-12-310001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-12-310001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2022-01-012022-09-300001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2022-01-012022-09-300001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2020-12-310001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2020-12-310001504008us-gaap:AccumulatedNetUnrealizedInvestmentGainLossMember2021-01-012021-09-300001504008us-gaap:AccumulatedGainLossNetCashFlowHedgeParentMember2021-01-012021-09-300001504008us-gaap:FairValueInputsLevel1Memberus-gaap:USTreasurySecuritiesMember2022-09-300001504008us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008us-gaap:USTreasurySecuritiesMember2022-09-300001504008us-gaap:FairValueInputsLevel1Memberbku:USGovernmentagencyandsponsoredenterpriseresidentialmortgagebackedsecuritiesMember2022-09-300001504008us-gaap:FairValueInputsLevel2Memberbku:USGovernmentagencyandsponsoredenterpriseresidentialmortgagebackedsecuritiesMember2022-09-300001504008bku:USGovernmentagencyandsponsoredenterpriseresidentialmortgagebackedsecuritiesMember2022-09-300001504008us-gaap:FairValueInputsLevel1Memberbku:UsGovernmentSponsoredEnterprisesDebtSecuritiesCommercialMember2022-09-300001504008bku:UsGovernmentSponsoredEnterprisesDebtSecuritiesCommercialMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008bku:UsGovernmentSponsoredEnterprisesDebtSecuritiesCommercialMember2022-09-300001504008us-gaap:FairValueInputsLevel1Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2022-09-300001504008us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008us-gaap:ResidentialMortgageBackedSecuritiesMember2022-09-300001504008us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMember2022-09-300001504008us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMember2022-09-300001504008us-gaap:CommercialMortgageBackedSecuritiesMember2022-09-300001504008us-gaap:FairValueInputsLevel1Memberbku:SinglefamilyrentalrealestatebackedsecuritiesMember2022-09-300001504008bku:SinglefamilyrentalrealestatebackedsecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008bku:SinglefamilyrentalrealestatebackedsecuritiesMember2022-09-300001504008us-gaap:FairValueInputsLevel1Memberus-gaap:CollateralizedLoanObligationsMember2022-09-300001504008us-gaap:CollateralizedLoanObligationsMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008us-gaap:CollateralizedLoanObligationsMember2022-09-300001504008bku:NonMortgageAssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-09-300001504008bku:NonMortgageAssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008bku:NonMortgageAssetBackedSecuritiesMember2022-09-300001504008us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001504008us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008us-gaap:USStatesAndPoliticalSubdivisionsMember2022-09-300001504008bku:SmallBusinessAdministrationSecuritiesMemberus-gaap:FairValueInputsLevel1Member2022-09-300001504008bku:SmallBusinessAdministrationSecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008bku:SmallBusinessAdministrationSecuritiesMember2022-09-300001504008us-gaap:FairValueInputsLevel1Memberus-gaap:EquitySecuritiesMember2022-09-300001504008us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008us-gaap:EquitySecuritiesMember2022-09-300001504008us-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueInputsLevel1Member2022-09-300001504008us-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008us-gaap:DerivativeFinancialInstrumentsAssetsMember2022-09-300001504008us-gaap:FairValueInputsLevel1Member2022-09-300001504008us-gaap:FairValueInputsLevel2Member2022-09-300001504008us-gaap:DerivativeFinancialInstrumentsLiabilitiesMemberus-gaap:FairValueInputsLevel1Member2022-09-300001504008us-gaap:DerivativeFinancialInstrumentsLiabilitiesMemberus-gaap:FairValueInputsLevel2Member2022-09-300001504008us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2022-09-300001504008us-gaap:FairValueInputsLevel1Memberus-gaap:USTreasurySecuritiesMember2021-12-310001504008us-gaap:USTreasurySecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008us-gaap:USTreasurySecuritiesMember2021-12-310001504008us-gaap:FairValueInputsLevel1Memberbku:USGovernmentagencyandsponsoredenterpriseresidentialmortgagebackedsecuritiesMember2021-12-310001504008us-gaap:FairValueInputsLevel2Memberbku:USGovernmentagencyandsponsoredenterpriseresidentialmortgagebackedsecuritiesMember2021-12-310001504008bku:USGovernmentagencyandsponsoredenterpriseresidentialmortgagebackedsecuritiesMember2021-12-310001504008us-gaap:FairValueInputsLevel1Memberbku:UsGovernmentSponsoredEnterprisesDebtSecuritiesCommercialMember2021-12-310001504008bku:UsGovernmentSponsoredEnterprisesDebtSecuritiesCommercialMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008bku:UsGovernmentSponsoredEnterprisesDebtSecuritiesCommercialMember2021-12-310001504008us-gaap:FairValueInputsLevel1Memberus-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001504008us-gaap:ResidentialMortgageBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008us-gaap:ResidentialMortgageBackedSecuritiesMember2021-12-310001504008us-gaap:FairValueInputsLevel1Memberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001504008us-gaap:FairValueInputsLevel2Memberus-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001504008us-gaap:CommercialMortgageBackedSecuritiesMember2021-12-310001504008us-gaap:FairValueInputsLevel1Memberbku:SinglefamilyrentalrealestatebackedsecuritiesMember2021-12-310001504008bku:SinglefamilyrentalrealestatebackedsecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008bku:SinglefamilyrentalrealestatebackedsecuritiesMember2021-12-310001504008us-gaap:FairValueInputsLevel1Memberus-gaap:CollateralizedLoanObligationsMember2021-12-310001504008us-gaap:CollateralizedLoanObligationsMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008us-gaap:CollateralizedLoanObligationsMember2021-12-310001504008bku:NonMortgageAssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-12-310001504008bku:NonMortgageAssetBackedSecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008bku:NonMortgageAssetBackedSecuritiesMember2021-12-310001504008us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel1Member2021-12-310001504008us-gaap:USStatesAndPoliticalSubdivisionsMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008us-gaap:USStatesAndPoliticalSubdivisionsMember2021-12-310001504008bku:SmallBusinessAdministrationSecuritiesMemberus-gaap:FairValueInputsLevel1Member2021-12-310001504008bku:SmallBusinessAdministrationSecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008bku:SmallBusinessAdministrationSecuritiesMember2021-12-310001504008us-gaap:FairValueInputsLevel1Memberus-gaap:EquitySecuritiesMember2021-12-310001504008us-gaap:EquitySecuritiesMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008us-gaap:EquitySecuritiesMember2021-12-310001504008bku:ServicingRightsMemberus-gaap:FairValueInputsLevel1Member2021-12-310001504008bku:ServicingRightsMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008bku:ServicingRightsMember2021-12-310001504008us-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueInputsLevel1Member2021-12-310001504008us-gaap:DerivativeFinancialInstrumentsAssetsMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008us-gaap:DerivativeFinancialInstrumentsAssetsMember2021-12-310001504008us-gaap:FairValueInputsLevel1Member2021-12-310001504008us-gaap:FairValueInputsLevel2Member2021-12-310001504008us-gaap:DerivativeFinancialInstrumentsLiabilitiesMemberus-gaap:FairValueInputsLevel1Member2021-12-310001504008us-gaap:DerivativeFinancialInstrumentsLiabilitiesMemberus-gaap:FairValueInputsLevel2Member2021-12-310001504008us-gaap:DerivativeFinancialInstrumentsLiabilitiesMember2021-12-310001504008bku:ImpairedLoansMemberus-gaap:FairValueInputsLevel3Member2022-09-300001504008bku:ImpairedLoansMemberus-gaap:FairValueInputsLevel3Member2021-12-310001504008us-gaap:FairValueInputsLevel3Memberbku:OREOandRepossessedAssetsMember2022-09-300001504008us-gaap:FairValueInputsLevel3Memberbku:OREOandRepossessedAssetsMember2021-12-310001504008us-gaap:PropertySubjectToOperatingLeaseMemberus-gaap:FairValueInputsLevel3Member2022-09-300001504008us-gaap:PropertySubjectToOperatingLeaseMemberus-gaap:FairValueInputsLevel3Member2021-12-310001504008us-gaap:FairValueInputsLevel3Member2022-09-300001504008us-gaap:FairValueInputsLevel3Member2021-12-310001504008us-gaap:CarryingReportedAmountFairValueDisclosureMember2022-09-300001504008us-gaap:CarryingReportedAmountFairValueDisclosureMember2021-12-310001504008us-gaap:LoanOriginationCommitmentsMember2022-09-300001504008us-gaap:UnusedLinesOfCreditMember2022-09-300001504008us-gaap:StandbyLettersOfCreditMember2022-09-30

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
                
For the quarterly period ended September 30, 2022
Commission File Number: 001-35039 

BankUnited, Inc.
(Exact name of registrant as specified in its charter)
Delaware27-0162450
(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)
14817 Oak LaneMiami LakesFL33016
(Address of principal executive offices) (Zip Code)
 
Registrant’s telephone number, including area code: (305569-2000 
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes  ý  No  o 
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes  ý  No  o 
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. 
Large accelerated filer
Accelerated filer
 ☐
Emerging growth company
Non-accelerated filer
Smaller reporting company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act o
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes    No  ☒ 
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date. 
ClassTrading SymbolName of Exchange on Which Registered
Common Stock, $0.01 Par ValueBKUNew York Stock Exchange

The number of outstanding shares of the registrant common stock, $0.01 par value, as of October 31, 2022 was 77,270,109.






BANKUNITED, INC.
Form 10-Q
For the Quarter Ended September 30, 2022
TABLE OF CONTENTS

i


GLOSSARY OF DEFINED TERMS

The following acronyms and terms may be used throughout this Form 10-Q, including the consolidated financial statements and related notes.
ACLAllowance for credit losses
AFSAvailable for sale
ALCOAsset/Liability Committee
ALMAsset Liability Management
AOCIAccumulated other comprehensive income
ARMAdjustable rate mortgage
ASCAccounting Standards Codification
ASUAccounting Standards Update
BFGBridge Funding Group, Inc.
BKUBankUnited, Inc.
BOLIBank Owned Life Insurance
BankUnitedBankUnited, National Association
The BankBankUnited, National Association
BridgeBridge Funding Group, Inc.
Buyout loansFHA and VA insured mortgages from third party servicers who have exercised their right to purchase these loans out of GNMA securitizations
CARES ActCoronavirus Aid, Relief, and Economic Security Act
CECLCurrent expected credit losses
CET1Common Equity Tier 1 capital
C&ICommercial and Industrial loans, including owner-occupied commercial real estate
CLOCollateralized loan obligations
CMBSCommercial mortgage-backed securities
CMEChicago Mercantile Exchange
CMOsCollateralized mortgage obligations
COVID-19Coronavirus disease of 2019
CRECommercial real estate loans, including multi-family; non-owner occupied commercial real estate; and construction and land
DSCRDebt Service Coverage Ratio
EVEEconomic value of equity
FASBFinancial Accounting Standards Board
FDIAFederal Deposit Insurance Act
FHAFederal Housing Administration
FHLBFederal Home Loan Bank
FICOFair Isaac Corporation (credit score)
FRBFederal Reserve Bank
GAAPU.S. generally accepted accounting principles
GDPGross Domestic Product
GNMAGovernment National Mortgage Association
HPIHome price indices
ISDAInternational Swaps and Derivatives Association
LGDLoss Given Default
LIBORLondon InterBank Offered Rate
LTVLoan-to-value
ii


MBSMortgage-backed securities
MSAMetropolitan Statistical Area
MWLMortgage warehouse lending
Non-OOCRENon-owner occupied commercial real estate
NRSRONationally recognized statistical rating organization
OOCREOwner occupied commercial real estate
OREOOther real estate owned
PCDPurchased credit-deteriorated
PDProbability of default
PinnaclePinnacle Public Finance, Inc.
PPNRPre-tax, pre-provision net revenue
PPPSmall Business Administration’s Paycheck Protection Program
REITReal Estate Investment Trust
SBAU.S. Small Business Administration
SECSecurities and Exchange Commission
SOFRSecured Overnight Financing Rate
S&P 500Standard & Poor's 500 Index
TDRTroubled-debt restructuring
Tri-StateNew York, New Jersey and Connecticut
UPBUnpaid principal balance
VA loanLoan guaranteed by the U.S. Department of Veterans Affairs
WARMWeighted-average remaining maturity

iii


PART I - FINANCIAL INFORMATION
Item 1.  Financial Statements and Supplementary Data
BANKUNITED, INC. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS - UNAUDITED
(In thousands, except share and per share data)
September 30,
2022
December 31,
2021
ASSETS  
Cash and due from banks:  
Non-interest bearing$18,380 $19,143 
Interest bearing707,758 295,714 
Cash and cash equivalents 726,138 314,857 
Investment securities (including securities recorded at fair value of $9,787,427 and $10,054,198)
9,797,427 10,064,198 
Non-marketable equity securities261,784 135,859 
Loans24,266,732 23,765,053 
Allowance for credit losses (130,671)(126,457)
Loans, net24,136,061 23,638,596 
Bank owned life insurance 308,176 309,477 
Operating lease equipment, net579,693 640,726 
Goodwill77,637 77,637 
Other assets707,978 634,046 
Total assets$36,594,894 $35,815,396 
LIABILITIES AND STOCKHOLDERS’ EQUITY  
Liabilities:  
Demand deposits:  
Non-interest bearing$8,794,109 $8,975,621 
Interest bearing2,341,342 3,709,493 
Savings and money market12,513,398 13,368,745 
Time3,700,226 3,384,243 
Total deposits27,349,075 29,438,102 
Federal funds purchased  199,000 
FHLB advances5,295,000 1,905,000 
Notes and other borrowings721,045 721,416 
Other liabilities748,789 514,117 
Total liabilities 34,113,909 32,777,635 
Commitments and contingencies
Stockholders' equity:  
Common stock, par value $0.01 per share, 400,000,000 shares authorized; 77,599,408 and 85,647,986 shares issued and outstanding
776 856 
Paid-in capital381,411 707,503 
Retained earnings2,506,539 2,345,342 
Accumulated other comprehensive loss(407,741)(15,940)
Total stockholders' equity 2,480,985 3,037,761 
Total liabilities and stockholders' equity $36,594,894 $35,815,396 
 
1
The accompanying notes are an integral part of these consolidated financial statements





BANKUNITED, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF INCOME - UNAUDITED
(In thousands, except per share data)
 Three Months Ended September 30,Nine Months Ended September 30,
 2022202120222021
Interest income:  
Loans$244,884 $194,689 $645,669 $602,544 
Investment securities77,109 38,243 174,928 114,418 
Other4,031 1,413 8,364 4,613 
Total interest income 326,024 234,345 828,961 721,575 
Interest expense:
Deposits53,206 14,273 85,569 53,965 
Borrowings36,982 24,950 73,498 77,937 
Total interest expense 90,188 39,223 159,067 131,902 
Net interest income before provision for credit losses 235,836 195,122 669,894 589,673 
Provision for (recovery of) credit losses
3,720 (11,842)35,546 (67,365)
Net interest income after provision for credit losses 232,116 206,964 634,348 657,038 
Non-interest income:
Deposit service charges and fees6,064 5,553 17,920 15,870 
Gain (loss) on investment securities, net
135 (664)(16,125)5,856 
Lease financing13,180 13,212 39,958 39,222 
Other non-interest income3,693 7,377 9,070 27,583 
Total non-interest income 23,072 25,478 50,823 88,531 
Non-interest expense:
Employee compensation and benefits66,097 57,224 195,646 172,971 
Occupancy and equipment 11,719 11,760 34,630 35,127 
Deposit insurance expense4,398 3,552 11,794 15,224 
Professional fees 3,184 2,312 8,702 6,363 
Technology19,813 16,687 54,715 49,279 
Depreciation of operating lease equipment12,646 12,944 37,841 37,995 
Other non-interest expense20,248 13,563 48,503 42,756 
Total non-interest expense 138,105 118,042 391,831 359,715 
Income before income taxes
117,083 114,400 293,340 385,854 
Provision for income taxes
29,233 27,459 72,576 96,125 
Net income
$87,850 $86,941 $220,764 $289,729 
Earnings per common share, basic$1.13 $0.94 $2.73 $3.12 
Earnings per common share, diluted$1.12 $0.94 $2.71 $3.12 
2
The accompanying notes are an integral part of these consolidated financial statements





BANKUNITED, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - UNAUDITED
(In thousands)
 Three Months Ended September 30,Nine Months Ended September 30,
 2022202120222021
Net income
$87,850 $86,941 $220,764 $289,729 
Other comprehensive income (loss), net of tax: 
Unrealized gains (losses) on investment securities available for sale: 
Net unrealized holding gain (loss) arising during the period(117,300)(16,205)(470,249)(24,764)
Reclassification adjustment for net securities gains realized in income
(258)(606)(2,906)(5,679)
Net change in unrealized gains (losses) on securities available for sale(117,558)(16,811)(473,155)(30,443)
Unrealized gains (losses) on derivative instruments:
Net unrealized holding gain (loss) arising during the period30,495 1,263 74,540 16,930 
Reclassification adjustment for net (gains) losses realized in income(283)10,359 6,814 32,603 
Net change in unrealized gains (losses) on derivative instruments30,212 11,622 81,354 49,533 
Other comprehensive income (loss)(87,346)(5,189)(391,801)19,090 
Comprehensive income (loss)$504 $81,752 $(171,037)$308,819 

3
The accompanying notes are an integral part of these consolidated financial statements



BANKUNITED, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED
(In thousands)

 Nine Months Ended September 30,
 20222021
Cash flows from operating activities:  
Net income
$220,764 $289,729 
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and accretion, net(5,444)(16,294)
Provision for (recovery of) credit losses
35,546 (67,365)
(Gain) loss on investment securities, net
16,125 (5,856)
Equity based compensation18,178 17,510 
Depreciation and amortization 57,737 56,122 
Deferred income taxes13,647 7,835 
Proceeds from sale of loans held for sale589,681 651,840 
(Increase) decrease in other assets
259,044 (128,937)
Increase in other liabilities
111,863 148,437 
Net cash provided by operating activities
1,317,141 953,021 
Cash flows from investing activities:  
Purchases of investment securities(2,713,761)(4,378,200)
Proceeds from repayments and calls of investment securities1,514,500 1,980,551 
Proceeds from sale of investment securities798,205 1,348,346 
Purchases of non-marketable equity securities(336,375)(16,199)
Proceeds from redemption of non-marketable equity securities210,450 56,480 
Purchases of loans(2,000,568)(3,681,706)
Loan originations and repayments, net 872,339 3,907,957 
Proceeds from sale of loans, net21,327 210,525 
(Acquisition) disposition of operating lease equipment, net23,256 (44,179)
Other investing activities(34,639)(13,270)
Net cash used in investing activities
(1,645,266)(629,695)
4
The accompanying notes are an integral part of these consolidated financial statements



BANKUNITED, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)
(In thousands)



 Nine Months Ended September 30,
 20222021
Cash flows from financing activities:  
Net increase (decrease) in deposits (2,089,027)620,457 
Net increase (decrease) in federal funds purchased(199,000)19,000 
Additions to FHLB borrowings4,075,000 1,231,001 
Repayments of FHLB borrowings(685,000)(1,921,000)
Dividends paid (60,082)(65,114)
Repurchase of common stock(336,533)(136,686)
Other financing activities34,048 38,322 
Net cash provided by (used in) financing activities
739,406 (214,020)
Net increase in cash and cash equivalents
411,281 109,306 
Cash and cash equivalents, beginning of period 314,857 397,716 
Cash and cash equivalents, end of period $726,138 $507,022 
Supplemental disclosure of cash flow information:
Interest paid $138,143 $125,834 
Income taxes (refunded) paid, net$(117,145)$247,798 
Supplemental schedule of non-cash investing and financing activities:
Transfers from loans to loans held for sale$613,243 $832,903 
Dividends declared, not paid$19,361 $20,676 
Unsettled securities trades, net$ $154,285 
Obligations incurred in acquisition of affordable housing limited partnerships$65,000 $ 



5
The accompanying notes are an integral part of these consolidated financial statements





BANKUNITED, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - UNAUDITED
(In thousands, except share data)
 Common
Shares
Outstanding
Common
Stock
Paid-in
Capital
Retained
Earnings
Accumulated
Other
Comprehensive
Loss
Total
Stockholders’
Equity
Balance at June 30, 2022
77,944,216 $779 $387,583 $2,438,050 $(320,395)$2,506,017 
Comprehensive income   87,850 (87,346)504 
Dividends ($0.25 per common share)
   (19,361) (19,361)
Equity based compensation4,300  4,647   4,647 
Forfeiture of unvested shares and shares surrendered for tax withholding obligations
(34,999) (30)  (30)
Repurchase of common stock (314,109)(3)(10,789)  (10,792)
Balance at September 30, 202277,599,408 $776 $381,411 $2,506,539 $(407,741)$2,480,985 
Balance at June 30, 2021
93,238,553 $932 $1,011,786 $2,173,698 $(24,873)$3,161,543 
Comprehensive income   86,941 (5,189)81,752 
Dividends ($0.23 per common share)
   (20,676) (20,676)
Equity based compensation9,756 1 3,554   3,555 
Forfeiture of unvested shares and shares surrendered for tax withholding obligations
(13,007)(1)(76)  (77)
Repurchase of common stock (3,185,976)(32)(129,391)  (129,423)
Balance at September 30, 202190,049,326 $900 $885,873 $2,239,963 $(30,062)$3,096,674 
 Common
Shares
Outstanding
Common
Stock
Paid-in
Capital
Retained
Earnings
Accumulated
Other
Comprehensive
Loss
Total
Stockholders’
Equity
Balance at December 31, 202185,647,986 $856 $707,503 $2,345,342 $(15,940)$3,037,761 
Comprehensive loss   220,764 (391,801)(171,037)
Dividends ($0.75 per common share)
   (59,567) (59,567)
Equity based compensation496,361 5 15,592   15,597 
Forfeiture of unvested shares and shares surrendered for tax withholding obligations
(199,339)(2)(5,234)  (5,236)
Repurchase of common stock (8,345,600)(83)(336,450)  (336,533)
Balance at September 30, 202277,599,408 $776 $381,411 $2,506,539 $(407,741)$2,480,985 
Balance at December 31, 202093,067,500 $