SBSI


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

Table of contents



us-gaap:CommonStockValue
us-gaap:ConsolidatedEntities

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CapitalToRiskWeightedAssets
us-gaap:ConsolidatedEntities

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:IncomeLossFromContinuingOperations
us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxesPaid

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpense

us-gaap:InterestIncomeExpenseNet
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestPaidNet

us-gaap:MarketingAndAdvertisingExpense

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:RealizedInvestmentGainsLosses

us-gaap:Assets
us-gaap:ConsolidatedEntities

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
dei:LegalEntity
us-gaap:TierOneRiskBasedCapital
us-gaap:ConsolidatedEntities

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:FurnitureAndFixturesGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:LongTermDebt

us-gaap:DebtAndCapitalLeaseObligations
us-gaap:DebtInstrument

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue
us-gaap:ConsolidatedEntities

us-gaap:AdditionalPaidInCapitalCommonStock
us-gaap:ConsolidatedEntities

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities

us-gaap:TreasuryStockValue
us-gaap:ConsolidatedEntities

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

sbsi:ATMExpense

sbsi:AdjustmentToPensionLiability
us-gaap:LongtermDebtType
sbsi:Aggregateprincipalamountofsubordinatednotes

sbsi:AmortizationofUnrealizedGainsLossesonSecuritiesTransferredBetweenAvailableforSaleAndHeldtoMaturityDebtSecuritiesBeforeTax
us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

sbsi:Bookvaluepercommonshare
us-gaap:DebtInstrument
sbsi:BorrowingsAverageAmountOutstanding
us-gaap:DebtInstrument
sbsi:BorrowingsMaximumMonthendOutstandingAmount

sbsi:FeeAndCommissionsDepositorAccount

sbsi:FeesAndCommissionsFiduciaryAndTrustActivity

sbsi:FinancingReceivableNonaccrualInterestIncomeReversal

sbsi:InterestIncomeOtherStocksAndBonds

sbsi:InterestexpenseFederalHomeLoanBankAdvances

sbsi:LoansTransferredToOtherRepossessedAssetsAndRealEstateThroughForeclosure

sbsi:NoninterestIncomeExcludingNetGainLossOnSaleOfSecurities

sbsi:OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossandPriorServiceCostCreditReclassificationAdjustmentfromAOCIbeforeTax

sbsi:OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditPlanAmendmentBeforeTax

sbsi:ReductionInRightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:BrokerageCommissionsRevenue

us-gaap:Communication

us-gaap:CurrentIncomeTaxExpenseBenefit
us-gaap:LongtermDebtType, us-gaap:StatementScenario, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DebtInstrumentInterestRateDuringPeriod

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss
us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanRestructuringModification
us-gaap:LoanRestructuringModification

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1

us-gaap:GainLossOnDispositionOfAssets

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainsLossesOnSalesOfOtherRealEstate

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndOtherIncome

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm

us-gaap:InterestExpenseJuniorSubordinatedDebentures

us-gaap:InterestExpenseOther

us-gaap:InterestExpenseSubordinatedNotesAndDebentures

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeOther

us-gaap:InterestIncomeSecuritiesCorporateDebtOperating

us-gaap:InterestIncomeSecuritiesMortgageBacked

us-gaap:InterestIncomeSecuritiesStateAndMunicipal

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesUSTreasuryAndOtherUSGovernment

us-gaap:InvestmentIncomeNetAmortizationOfDiscountAndPremium

us-gaap:LaborAndRelatedExpense

us-gaap:NetChangeInterestAndNoninterestBearingDepositsDomestic

us-gaap:NoninterestExpense

us-gaap:NoninterestIncome

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:OccupancyNet

us-gaap:OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:OtherComprehensiveIncomeLossTax
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherInterestAndDividendIncome

us-gaap:OtherNoninterestExpense

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireFederalReserveStock

us-gaap:PaymentsToAcquireFinanceReceivables

us-gaap:PaymentsToAcquireLifeInsurancePolicies

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings

us-gaap:ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan

us-gaap:ProceedsFromIssuanceOfSubordinatedLongTermDebt

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfFederalReserveStock

us-gaap:ProceedsFromSaleOfForeclosedAssets

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanLeaseAndOtherLosses

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:UnrealizedGainLossOnInvestments
us-gaap:LineOfCreditFacility
sbsi:AdditionalFundingAvailable
us-gaap:TitleOfIndividual
sbsi:BankOwnedLifeInsuranceAggregateDeathBenefitsProvidedInContractBeforeInflationAdjustment
us-gaap:TitleOfIndividual
sbsi:BankOwnedLifeInsuranceAggregateDeathBenefitsProvidedInContractInflationAdjusted

sbsi:BorrowedFundsMaturingAfterYearFive
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturinginYearFive
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturinginYearFour
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturinginYearThree
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturinginYearTwo
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipal
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFive
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFour
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearThree
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearTwo
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInTheNextRollingTwelveMonths
us-gaap:DebtInstrument

sbsi:BorrowedFundsMaturitiesRepaymentsofPrincipalintheNextTwelveMonths
us-gaap:DebtInstrument
sbsi:DepositsByCustomerAlternative
sbsi:Certificatesandothertimedeposits250000ormore
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
sbsi:CommercialRealEstateFarmLand
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
sbsi:CommercialRealEstateMultifamily
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
sbsi:CommercialRealEstateOwnerandNonOwnerOccupiedRealEstate

sbsi:DebtSecuritiesHeldtoMaturityNetofAllowanceforCreditLosses
us-gaap:FinancialInstrument

sbsi:DeferredTaxAssetFairValueAdjustmentonAcquiredLoans

sbsi:DeferredTaxAssetOperatingLeaseLiabilities

sbsi:DeferredTaxAssetsUnfundedStatusOfDefinedBenefitPlan

sbsi:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

sbsi:DeferredTaxLiabilitiesPensionPlan
us-gaap:RetirementPlanType
sbsi:DefinedBenefitPlanExpectedFutureBenefitPayments
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
sbsi:DerivativeWeightedAveragePayRate
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
sbsi:DerivativeWeightedAverageReceiveRate
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

sbsi:FinancingReceivableCollateralDependent
us-gaap:FinancialInstrumentPerformanceStatus
sbsi:FinancingReceivableNonperformingAndRepossessedAssets
sbsi:DepositsByCustomerAlternative
sbsi:InterestBearingDomesticDepositCheckingPremierBusinessChecking
sbsi:DepositsByCustomerAlternative
sbsi:InterestBearingDomesticDepositMoneyMarketPlatinum
us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
sbsi:InvestmentInSubsidiariesAtEquityInUnderlyingNetAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
sbsi:InvestmentSecuritiesHeldtomaturitySecuritiesFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

sbsi:LesseeOperatingLeaseLeaseNotYetCommencedPaymentsDue

sbsi:LoansAndLeasesReceivableRelatedPartiesAsPercentOfShareholdersEquity

sbsi:LoansinProcessofForeclosure

sbsi:NumberofSquareFeetOccupied
us-gaap:RetirementPlanType
sbsi:PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossTax

sbsi:RestructuredNonaccrualLoans

sbsi:SecuritiesTransferredUnrealizedLossNetOfTax
us-gaap:AwardType
sbsi:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue
us-gaap:TitleOfIndividual
sbsi:SplitDollarAgreements
sbsi:DepositsByCustomerAlternative
sbsi:TimeDepositsLessthan250000Domestic

sbsi:TransferredSecuritiesUnrealizedLossBeforeTax

sbsi:UnsettledTradesToPurchaseSecuritiesLiability

sbsi:UnsettledTradesToRepurchaseCommonStock
sbsi:ClassOfDepositLiabilities
sbsi:WeightedAverageCostDomesticDepositBrokered
us-gaap:RetirementPlanType
us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

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:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:BankOwnedLifeInsurance

us-gaap:BuildingsAndImprovementsGross
dei:LegalEntity
us-gaap:Capital
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:CashAndDueFromBanks
us-gaap:ConsolidatedEntities

us-gaap:CollateralAlreadyPostedAggregateFairValue
dei:LegalEntity
us-gaap:CommonEquityTierOneCapital
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CommonEquityTierOneCapitalRatio
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:CommonEquityTierOneCapitalRequiredToBeWellCapitalized
us-gaap:DebtInstrument
us-gaap:DebtInstrumentFaceAmount
us-gaap:LongtermDebtType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrumentFairValue
us-gaap:FairValueByMeasurementBasis
us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateEffectivePercentage

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:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss

us-gaap:DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss
us-gaap:FinancialInstrument
us-gaap:DebtInstrument
us-gaap:DebtWeightedAverageInterestRate
us-gaap:TitleOfIndividual
us-gaap:DeferredCompensationArrangementWithIndividualRecordedLiability

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:Deposits
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:DepositsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:DerivativeAssetFairValueGrossLiability

us-gaap:DerivativeAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:DerivativeCollateralRightToReclaimCash

us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:DerivativeLiabilityCollateralRightToReclaimCashOffset

us-gaap:DerivativeLiabilityFairValueGrossAsset
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquitySecuritiesFvNiAndWithoutReadilyDeterminableFairValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:EquitySecuritiesFvNiCost
us-gaap:FairValueByMeasurementFrequency
us-gaap:CounterpartyName
us-gaap:FairValueConcentrationOfRiskDerivativeFinancialInstrumentsAssets

us-gaap:FairValueDisclosureOffbalanceSheetRisksAmountLiability
us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FederalFundsPurchasedAndSecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase
us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch
us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds
us-gaap:Range
us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresInterestRateAtPeriodEnd
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:FederalHomeLoanBankStock
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FinancialLiabilitiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss

us-gaap:FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest

us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableExcludingAccruedInterestRevolving
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancialInstrumentPerformanceStatus
us-gaap:FinancingReceivableModificationsRecordedInvestment

us-gaap:FinancingReceivableNonaccrualNoAllowance

us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancialInstrumentPerformanceStatus
us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableRecordedInvestmentPastDue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivableRevolving
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ForeclosedAssets
us-gaap:FairValueByMeasurementFrequency

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount

us-gaap:HeldToMaturitySecuritiesFairValue
us-gaap:FinancialInstrument

us-gaap:HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost

us-gaap:HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost

us-gaap:HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:ImpairedFinancingReceivableRecordedInvestment
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:FairValueByMeasurementFrequency

us-gaap:InterestBearingDepositLiabilities

us-gaap:InterestBearingDepositLiabilitiesDomestic
sbsi:DepositsByCustomerAlternative

us-gaap:InterestBearingDepositsInBanks
sbsi:ClassOfDepositLiabilities
us-gaap:InterestBearingDomesticDepositBrokered
sbsi:DepositsByCustomerAlternative
us-gaap:InterestBearingDomesticDepositMoneyMarket
sbsi:DepositsByCustomerAlternative
us-gaap:InterestBearingDomesticDepositNegotiableOrderOfWithdrawalNOW
sbsi:DepositsByCustomerAlternative
us-gaap:InterestBearingDomesticDepositSavings

us-gaap:InterestReceivable
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:InvestmentInFederalHomeLoanBankStockFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:InvestmentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust
us-gaap:ConsolidatedEntities

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears
us-gaap:LineOfCreditFacility
us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LoansAndLeasesReceivableAllowance

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount

us-gaap:LoansAndLeasesReceivableNetReportedAmount

us-gaap:LoansAndLeasesReceivableRelatedParties
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:MortgageBackedSecuritiesHeldToMaturityFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:MortgageLoansInProcessOfForeclosureAmount

us-gaap:NetRentableArea

us-gaap:NoninterestBearingDepositLiabilities

us-gaap:NoninterestBearingDepositLiabilitiesDomestic
sbsi:DepositsByCustomerAlternative

us-gaap:NotesReceivableGross
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:LoanRestructuringModification

us-gaap:NotesReceivableNet

us-gaap:OffBalanceSheetCreditLossLiability
us-gaap:CumulativeEffectPeriodOfAdoption

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:FinancialInstrumentPerformanceStatus
us-gaap:OtherForeclosedAssets

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities

us-gaap:OtherLongTermDebt
us-gaap:LongtermDebtType
sbsi:ClassOfDepositLiabilities
us-gaap:PercentageOfInterestBearingDomesticDepositsToDepositsBrokered

us-gaap:PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged
us-gaap:FinancialInstrumentPerformanceStatus
us-gaap:RealEstateAcquiredThroughForeclosure

us-gaap:RelatedPartyDepositLiabilities

us-gaap:SecuritiesSoldUnderAgreementsToRepurchase
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SubordinatedDebt
us-gaap:ConsolidatedEntities
us-gaap:LongtermDebtType
dei:LegalEntity
us-gaap:TierOneLeverageCapital
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
dei:LegalEntity
us-gaap:TierOneLeverageCapitalToAverageAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

us-gaap:TimeDepositMaturitiesAfterYearFive

us-gaap:TimeDepositMaturitiesYearFive

us-gaap:TimeDepositMaturitiesYearFour

us-gaap:TimeDepositMaturitiesYearThree

us-gaap:TimeDepositMaturitiesYearTwo

us-gaap:TimeDeposits
us-gaap:LongtermDebtType
us-gaap:UnamortizedDebtIssuanceExpense

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Income Tax Expense Benefit
Balance Sheet
Intangible Assets Net Excluding Goodwill
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Intangible Assets Net Excluding Goodwill
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Derivative Liabilities
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Common Stock Value
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
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
BanksAndOrInsurance
Securities Sold Under Agreements To Repurchase
AssetsBanks
Other Assets
LiabilitiesBanks
Deposits

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ███████████████▆▆▆▆▅▅▄▄▄▄▄▄▂▂▂▂▂▂▂▁▁▁▁▁▁▁47.43947.4347.41947.40247.38747.37347.3647.34647.33347.3247.30747.29147.27847.26547.25340.32140.30639.37539.3236.48936.45534.85334.83234.80334.77633.23933.22326.73126.64426.61925.48325.45125.4225.3924.30824.24724.22824.19923.14623.11223.092NA22.075NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█32.79932.937NA33.09833.08333.805NA33.90133.87633.846NA35.28835.23335.2NA29.5729.51928.777NA26.41526.34925.252NA25.44525.42525.403NA18.96518.92518.902NA17.92517.88117.877NA17.3770.01735318.204NA17.2860.017269NANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█32.63232.829NA33.04733.01633.691NA33.77333.72633.697NA35.11435.06235.022NA29.3729.31828.569NA26.26226.2325.186NA25.3625.33725.322NA18.86418.83218.818NA17.87617.84917.857NA17.3630.01734118.191NA17.2790.017263NANANANANA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▁█0.0030.679NA0.8350.860.775NA0.4770.480.49NA0.0840.0530.041NA0.0450.0520.052NA0.0030.0220.095NA0.0580.0120.01NA0.0030.0180.024NA0.00.0170.025NA0.0160.0040.008NA0.0290.003NANANANANA
us-gaap:EarningsPerShareBasic ▆█▇▇▆▃▅▅▅▅▅▅▅▅▄▅▅▅▅▅▅▅▅▅▅▄▁▄▅▅▆▅▅▅▅▅▅▅▅▆▆▅▅▆▅▆0.651.040.890.820.650.120.510.590.550.560.50.580.580.460.330.490.490.520.430.490.430.540.460.460.440.37-0.20.320.550.440.680.430.560.480.470.50.450.580.550.70.670.490.440000000000000170.670.560.7
us-gaap:EarningsPerShareDiluted ▆█▇▇▆▃▅▅▅▅▅▅▅▅▄▅▅▅▅▅▅▅▅▅▅▄▁▄▅▅▆▄▅▅▅▅▅▅▅▆▆▅▅▆▅▆0.651.040.890.820.650.120.510.580.550.560.50.580.570.460.330.490.490.520.430.490.430.540.460.460.440.37-0.20.320.550.440.680.420.560.480.470.50.450.580.550.70.670.490.440000000000000170.670.560.7
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets dei:LegalEntity sbsi:BankSubsidiariesNANA1.841e-05NANANA1.758e-07NANANA1.8590000000000002e-07NANANA1.827e-07NANANA1.7979999999999998e-07NANANA1.4360000000000002e-07NANANA1.555e-07NANANA2.022e-07NANANA2.06e-07NANANA2.026e-07NANANANANANANA
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities us-gaap:ConsolidatedEntitiesNANA1.608e-05NANANA1.546e-07NANANA1.6289999999999998e-07NANANA1.6120000000000001e-07NANANA1.6370000000000002e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity sbsi:BankSubsidiariesNANA1.9379999999999997e-05NANANA1.82e-07NANANA1.934e-07NANANA1.8859999999999998e-07NANANA1.86e-07NANANA1.507e-07NANANA1.613e-07NANANA2.146e-07NANANA2.1859999999999999e-07NANANA2.152e-07NANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities us-gaap:ConsolidatedEntitiesNANA2.178e-05NANANA1.843e-07NANANA1.959e-07NANANA1.9220000000000001e-07NANANA2.01e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ComprehensiveIncomeNetOfTax 46.618NANA30.33431.02633.256NA31.54839.31853.272NA8.63414.8510.579NA14.81922.52718.891NA5.55419.83328.806NA20.5221.95714.483NA7.37415.915.052NA6.831-17.2332.73NA16.1886.513.583NA19.91723.89112.462NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest NA4.597NANANA33.256NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA5.23519.91723.89112.462-3.09610.95914.1367.537
 us-gaap:IncomeLossFromContinuingOperations us-gaap:DerivativeInstrumentRisk,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:InterestRateSwap,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,sbsi:AccumulatedNetGainLossFromTerminatedInterestRateSwapDerivativesNANA0.0040.0050.0040.0070.0180.0170.0170.0170.0180.0170.0170.0170.0140.0140.0140.0060.00.00.00.0NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperations us-gaap:InformationByCategoryOfDebtSecurity,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:AvailableforsaleSecurities,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss▂▄▂▂▅█▂▂▂▂▂▁▂▁▂▂▂0.0111.583-0.0190.0622.1034.3770.0330.0330.3290.2020.048-0.585-0.262-0.653-0.1620.407-0.049NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▆█▇▇▆▃▅▆▆▅▅▆▆▅▅▅▅▅▄▅▄▅▄▄▄▄▁▃▄▄▄▃▄▄▄▄▄▄▄▄▄▄▃▄▄▅24.20438.84133.83730.85724.3634.43220.18923.45322.17921.95419.90222.49523.56318.34116.20118.40117.83417.99713.41215.60614.16716.48913.1313.73313.13111.282-7.8635.85411.2959.38313.4687.91811.80110.3799.57210.1659.33713.22912.03315.14614.7711.0258.27215.11112.30116.13
us-gaap:IncomeTaxExpenseBenefit ▆▇▇▇▆▄▆▆▆▆▆▅▆▅█▇▆▆▅▆▆▆▅▅▅▅▁▄▄▅▅▄▅▅▅▅▅▆▆▆▆▅▅▇▆2.8874.754.2653.7832.8090.4792.8543.6613.5693.1372.5212.1923.362.15.873.93.3533.01.8392.72.83.01.4381.9711.9671.903-3.918-0.2430.8381.1591.2810.3041.7291.8541.3521.5581.6083.092.473.6293.2411.7861.463.8112.53NA
us-gaap:IncomeTaxesPaid ▇▁▄▅▆▁▄▅▄▁▁▃▁▁▄▄▆▁▁▁▆▁▄▄▃▁▁▂▄▁▂▂▃▁▁▃█▃▃▄▄▁▂▆▆▁6.00.253.04.05.00.03.04.03.50.00.02.00.00.03.02.85.50.00.00.25.50.03.253.252.00.00.00.753.050.51.31.11.60.00.02.07.22.02.53.03.50.01.14.94.650.0
us-gaap:InterestAndFeeIncomeLoansAndLeases ▆▆▇▇▇█████▇▇▇▇▅▄▄▄▄▃▄▄▃▃▃▃▁▁▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁35.7236.03839.25538.18539.11541.89542.52243.16542.98241.61940.72939.83139.30138.8332.96729.32228.0927.25426.82625.7426.23327.76524.82723.78723.88723.91616.76217.16818.30518.36318.2318.62518.3917.66517.31917.84717.52616.7716.10616.22917.1317.27117.84516.92617.43717.765
us-gaap:InterestExpense ▂▃▃▃▅▇████▇▆▆▅▅▅▄▄▃▃▂▂▂▁▁▁▁▁▁▁▁▁▁▁▂▂▂▃▃▃▄▄▄▅▅▅6.9397.2628.1979.09111.22416.05117.35718.18217.54117.90215.61214.74213.68613.06111.79811.51310.5859.6089.0397.2026.716.3955.2674.9264.8454.8164.2594.124.234.3474.3534.174.3445.1015.8226.4566.8977.728.1918.6379.1579.64610.47711.46411.45511.911
us-gaap:InterestIncomeExpenseNet ▇▇█▇█▇▇▆▇▆▆▆▇▇▆▅▅▅▅▄▅▅▅▄▄▄▂▃▃▃▃▂▂▁▁▂▂▂▂▂▂▂▂▁▁▂45.64746.30348.70746.58647.27144.70143.17642.37343.13141.12542.4142.4143.11144.13338.30634.9635.42435.2834.64133.9334.37936.61734.69733.28532.90533.79125.35425.7227.85627.89228.66225.2723.84120.9320.57622.00822.54523.99624.56524.01624.56722.25922.33221.28919.3723.076
 us-gaap:InterestIncomeExpenseNonoperatingNet us-gaap:DerivativeInstrumentRisk,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:InterestRateSwap,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,sbsi:AccumulatedNetGainLossFromTerminatedInterestRateSwapDerivativesNANA0.0050.0060.0060.0080.0220.0220.0210.0220.0220.0220.0220.0210.0220.0210.022NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▁▂▁▃▃▇▆█▆▇▅6.6968.2887.16211.3610.59418.08516.84219.78415.60218.22413.635NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MarketingAndAdvertisingExpense ▃▃▄▄▁█▇▅▇█▇▅▇▆▅▃▄▅▅▅▆▆▆▅▆▆▅▃▅▄▇▅▆▅▆▅▅▅▆▅▄▄▅▅▄▄0.4750.4370.5040.5190.2920.8320.7910.5930.7330.8470.7860.6480.7750.6850.6010.4870.5480.5830.6480.5880.7220.6850.7260.6420.6830.6570.5820.4890.6050.5430.7460.5990.6560.6410.650.6060.6030.6040.720.5910.550.5530.6220.6160.5440.537
us-gaap:NetIncomeLoss ▆█▇▇▆▂▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▃▁▃▄▃▄▃▄▃▃▃▃▄▃▄▄▃▃▄▃▄21.31734.09129.57227.07421.5543.95317.33519.79218.6118.81717.38120.30320.20316.25110.33114.51114.48114.98911.57312.86511.39513.51611.69211.76211.1649.379-3.9456.09710.4578.22412.1877.61410.0728.5258.228.6077.72910.1399.56311.51711.0368.3747.15811.0489.25211.645
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▇▂▇▅▆▇▃▆▇█▆▃▄▃▄▅▅▅▁▄▅▆▄▅▄▅▄▅▅▅▆▅▂▄▃▅▄▄▄▆▆25.301-29.49422.8093.269.47229.303-12.45511.75620.70834.45518.763-11.669-5.352-15.672-4.3580.3088.0463.902-36.227-7.3118.43815.29-7.778.76-9.2075.104-8.0811.2775.4436.8289.908-0.783-27.305-5.795-11.5897.581-1.219-6.556-4.32811.35410.765NANANANANA
us-gaap:ProfitLoss ▆█▇▇▆▂▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▃▁▃▄▃▄▃▄▃▃▃▃▄▃▄▄▃▃▄▄▄21.31734.09129.57227.07421.5543.95317.33519.79218.6118.81717.38120.30320.20316.25110.33114.51114.48114.98911.57312.86511.39513.51611.69211.76211.1649.379-3.9456.09710.4578.22414.9797.61410.0728.5258.228.6077.72910.1399.56311.51711.5299.2396.81211.39.77112.175
us-gaap:RealizedInvestmentGainsLosses ▇▄▁▁▆▇▅▆██▇▅▅▄0.017-0.107-0.249-0.2320.0010.053-0.07-0.0270.0870.0760.059-0.042-0.042-0.092NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █▇▇███▇▇▆▆▆▆▆▆▇▅▅▅▅▅▄▄▄▄▄▄▄▁▂▂▂▂▁▁▁▁▁▁▁▁▁7182.4086998.8867008.2277190.967329.6117273.6386748.9136542.0756372.876217.1966123.4946105.3546250.1736373.1976498.0975484.435578.4825656.2495563.7675464.9035035.0055019.0125162.0764837.4754856.0184732.3934807.2613368.0313498.6623434.3443445.6633467.9743384.9783312.0973237.4033221.0853400.9563217.4443303.8173210.2793115.208NA2999.621NANANA
us-gaap:Liabilities █▇▇███▇▆▆▆▆▆▆▆▇▅▅▅▅▅▄▄▅▄▄▄▄▁▂▂▂▂▂▁▁▁▂▁▁▁▁6288.0086140.2896132.936351.8126512.0066477.8385944.3335731.6225585.1055459.1635392.2035352.8485498.3635626.8015743.9574928.4075031.4175124.7835045.4934992.3434562.7054561.4364718.0144390.3274424.3444297.5794382.0183076.9223214.7023162.9513186.1453228.6663149.5453056.3852979.642944.5123137.62957.5653044.892952.1362870.733NA2784.185NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇███▇▇▆▆▆▆▆▆▇▅▅▅▅▅▄▄▄▄▄▄▄▁▂▂▂▂▁▁▁▁▁▁▁▁▁7182.4086998.8867008.2277190.967329.6117273.6386748.9136542.0756372.876217.1966123.4946105.3546250.1736373.1976498.0975484.435578.4825656.2495563.7675464.9035035.0055019.0125162.0764837.4754856.0184732.3934807.2613368.0313498.6623434.3443445.6633467.9743384.9783312.0973237.4033221.0853400.9563217.4443303.8173210.2793115.208NA2999.621NANANA
us-gaap:StockholdersEquity ███▇▇▇▇▇▇▇▆▆▆▆▇▄▄▄▄▄▄▃▃▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁▁▁▁894.4858.597875.297839.148817.605795.8804.58810.453787.765758.033731.291752.506751.81746.396754.14556.023547.065531.466518.274472.56472.3457.576444.062447.148431.674434.814425.243291.109283.96271.393259.518239.308235.433255.712257.763276.573263.356259.879258.927258.143242.479NA214.323NANANA
 us-gaap:TierOneRiskBasedCapital dei:LegalEntity sbsi:BankSubsidiariesNANA768.2NANANA738.311NANANA714.991NANANA711.157NANANA566.423NANANA416.378NANANA384.009NANANA312.879NANANA282.936NANANA268.874NANANANANANANA
 us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities us-gaap:ConsolidatedEntitiesNANA671.147NANANA649.465NANANA626.718NANANA627.532NANANA515.831NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▄▃▃▃▃▃▃▃▄█▃▅▇█▆▅▇▇▅▆▂▂▂▂▂▃▂▂▅▂▁▂▁▂▄▄▃▁▁▁▁▁▂▂▁▁128.488107.623108.40896.204100.806112.213110.697114.824132.521269.943120.719174.072232.069262.811198.692184.513235.832246.994169.654199.08864.11368.45480.97571.89477.029107.17884.65569.221154.42357.39254.43159.67649.79755.118150.63131.972106.23646.20843.23847.13148.45449.6279.07379.17246.28538.162
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▂▁▁▁▁▂▂▂▂█▂▄128.488107.623108.40896.204100.806112.213110.697114.824132.521269.943120.719174.072NANA198.692NANANA169.654NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:PropertyPlantAndEquipmentGross NANA219.867NANANA221.596NANANA207.938NANANA199.382NANANA164.573NANANA159.695NANANA157.785NANANA94.275NANANA88.721NANANA86.095NANANANANANANA
us-gaap:FurnitureAndFixturesGross NANA39.842NANANA44.647NANANA41.81NANANA40.565NANANA36.603NANANA35.069NANANA36.045NANANA27.382NANANANANANANANANANANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA75.291NANANA77.684NANANA71.966NANANA65.742NANANA58.57NANANA51.766NANANA44.925NANANA42.215NANANA38.646NANANA35.5NANANANANANANA
us-gaap:AmortizationOfIntangibleAssets ▃▄▄▄▅▅▆▆▆▇▇▇██▃▁▁▁0.730.7660.8250.8810.9310.981.031.081.1291.1791.2281.2791.3281.3780.7260.3880.410.431NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet ████████▇▇▇▇▇▇▇▅▅▅▅▅▅▅▅▅▅▅▆▁▁▁▁▁▁▁▁▁▁▁▁▁▁142.835144.628144.576147.169147.715146.212143.912141.683140.105138.29135.972133.939132.578131.625133.64107.099105.938105.327106.003106.777107.242107.556107.929109.087110.493111.903112.8653.88953.32252.55452.0651.21350.18649.98550.07549.92550.2550.38150.59550.48150.568NA50.144NANANA
us-gaap:Goodwill ███████████████▄▄▄▄▄▄▄▄▄▄▄▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁201.116201.116201.116201.116201.116201.116201.116201.116201.116201.116201.116201.116201.246201.246201.24691.5291.5291.5291.5291.5291.5291.5291.5291.5290.57190.39491.37222.03422.03422.03422.03422.03422.03422.03422.03422.03422.03422.03422.03422.03422.034NA22.034NANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▃▄▄▄▄▅▅▅▆▆▆▇▇██▂▂▂▂▃▃▃▃▃▃▃▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁8.2488.9789.74410.56911.4512.38113.36114.39115.47116.617.77919.00920.28721.61522.9933.3793.7674.1774.6085.065.5346.0296.5487.097.6548.2428.8440.10.1230.1490.1780.2110.2450.2830.3240.3690.4160.4670.5220.580.642NA0.777NANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CoreDepositsNANA6.6NANANA9.5NANANA13.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:CustomerRelationshipsNANA3.1NANANA3.8NANANA4.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▇▇▇██▅▅▅▅▅▁15.47215.78815.06316.61617.0779.6719.75510.0469.8129.4550.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:TimeDepositMaturitiesYearOne NANA651.898NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:LongTermDebt ███▁▁▁▁▁▁▁▁257.57257.524257.506158.962158.916158.871158.826158.781158.738158.695158.653NANANA158.489310.505320.658411.31601.464621.64559.148622.301562.592558.867632.565609.856660.363536.315566.021566.871559.66528.45502.119450.115429.408442.179427.3341.929321.035335.769338.29NA433.79NANANA
us-gaap:DebtAndCapitalLeaseObligations NA687.845855.699994.5121165.4631492.271001.102988.577849.821628.498755.875728.852943.323938.5181185.348NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtAndCapitalLeaseObligations us-gaap:DebtInstrument us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNA22.31523.17241.56871.305217.928.3589.62626.0648.63736.818.9758.2877.8259.498NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtAndCapitalLeaseObligations us-gaap:DebtInstrument us-gaap:FederalHomeLoanBankAdvancesNA665.53832.527952.9441094.1581274.37972.744978.951823.757619.861719.065561.267776.467772.1651017.361NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet █▄▇▄▃▂▁16.4569.86915.5499.618.0936.9644.823NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA1.518NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA1.379NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA1.225NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA1.22NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA14.037NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ███▇▇▇▇▇▇▇▆▆▆▆▇▄▄▄▄▄▄▃▃▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁▁▁▁894.4858.597875.297839.148817.605795.8804.58810.453787.765758.033731.291752.506751.81746.396754.14556.023547.065531.466518.274472.56472.3457.576444.062447.148431.674434.814425.243291.109283.96271.393259.518239.308235.433255.712257.763276.573263.356259.879258.927258.143242.479NA214.323NANANA
us-gaap:CommonStockValue ███████████████▆▆▆▆▅▅▄▄▄▄▄▄▂▂▂▂▂▂▂▁▁▁▁▁▁▁47.43947.4347.41947.40247.38747.37347.3647.34647.33347.3247.30747.29147.27847.26547.25340.32140.30639.37539.3236.48936.45534.85334.83234.80334.77633.23933.22326.73126.64426.61925.48325.45125.4225.3924.30824.24724.22824.19923.14623.11223.092NA22.075NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ███████████████▆▅▅▅▄▄▄▄▄▄▃▃▂▂▂▁▁▁▁▁▁▁▁▁▁▁777.413774.815771.511770.639769.407768.44766.718765.512764.22763.582762.47761.594759.562758.653757.439563.553561.728536.653535.24459.808458.817424.753424.078423.167422.392390.515389.886244.15240.305239.678214.091213.242212.648212.151195.602194.485193.994193.553176.791176.086178.45NA162.877NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▆▅▄▄▄▄▄▃▄▃▃▂▂▁▁▂▂▁▁▃▂▂▂▃▃▄▃▃▄▄▄▃▄▄▄▃▄▄▃145.277134.782111.20893.91677.13465.86380.27474.47765.18357.02364.79758.57848.84339.18432.85125.67719.40837.9230.09826.4219.87449.25441.52737.78331.87159.21855.39665.40963.46956.99778.67369.25265.21958.7270.70871.69166.56562.33972.64670.02861.472NA64.567NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax █▇█▇▇▆▅▅▅▄▂▁▂▂▃▃▃▃▃▄▅▄▄▄▄▄▄▄▄▄▃▃▃▄▅▅▅▅▅▅▅64.88739.58669.0846.27143.01133.5394.23616.6914.935-15.773-50.228-68.991-57.322-51.97-36.298-26.237-26.545-34.591-38.493-2.2665.045-3.393-18.683-10.913-19.673-10.466-15.57-7.489-8.766-14.209-21.037-30.945-30.162-2.8572.93814.5276.9468.16514.72117.2947.842NA-6.819NANANA
us-gaap:TreasuryStockValue ██▇▇▇▇▅▅▅▅▅▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁140.616138.016123.921119.08119.334119.41594.00893.57393.90694.11993.05545.96646.55146.73647.10547.29147.83247.89147.89147.89147.89147.89137.69237.69237.69237.69237.69237.69237.69237.69237.69237.69237.69237.69235.79328.37728.37728.37728.37728.37728.377NA28.377NANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▁0.6860.674NA0.7860.7720.695NA0.5220.5710.6610.6910.6610.5090.4560.4220.480.4190.4940.3850.3980.4030.3550.4140.4140.2940.2730.2440.2650.2910.2860.340.1980.1660.2070.2080.170.0940.0390.1180.117NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃█▆▅▃▁▄▄▃▄▃▅▄▆▃▄▃▅▄▅▂▄▃▅▂▄▁▄▃▄▃▄▂▃▂▄▃▄▃▄▃▄▂▃▂▄17.80462.41540.26932.78219.368-1.89920.65225.13814.34220.47419.29232.5828.86541.66514.37328.60916.04732.70120.12831.0419.48126.07513.24231.0067.06521.668-4.51423.25310.46626.82910.1626.3414.22518.789.00523.82610.08426.65316.87720.95213.55322.28.83612.238.22923.291
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▆█▇▆▁▄▄▃▇▅▇▇█▇▆▇▆▄▃▆▇▃▆▄▇▄▆▆▆▆▅▅▅▆█▄█▅▅▆▅▆▆▆▆-105.136-34.71200.016110.727-25.345-509.133-217.844-183.644-274.215108.873-66.40797.85778.811151.64381.29621.257.32412.917-204.003-299.194-22.437141.23-331.21623.19-169.72393.34-159.39638.46447.5746.068-5.374-103.95-131.084-127.395-11.17174.705-186.968160.593-102.624-98.651-46.443-93.63-7.33-2.25440.449-16.146
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▁▂▃█▅▄▄▃▃▁▂▂▂▂▂▃▅▇▃▁▆▃▄▂▅▂▄▃▃▄▄▃▃▂▅▁▄▄▃▄▃▃▃▃108.197-28.49-228.081-148.111-5.43512.548193.065140.809122.45119.877-6.238-188.434-138.418-129.189-81.49-101.128-84.53331.722154.441403.1288.615-179.826327.055-59.331132.509-92.485179.344-146.91938.991-29.936-10.03187.488121.53813.10320.823-172.795236.912-184.27681.85476.37631.72441.977-1.60522.911-40.555-21.149
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▅▄▅▄▄▄▄▄▁█▃20.865-0.78512.204-4.602-11.4071.516-4.127-17.697-137.422149.224-53.353NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▅▇▅▆▅▁▅▅▅▅▇▇█▅█▆▅▅▅▇▇▅▅▅▅▄▇▅▅▅▅▄▅▆-0.1392.161-0.1250.650.12-5.0750.126-0.1460.0160.1261.6192.0972.693-0.2553.0610.4360.036-0.019-0.1481.411.318-0.812-0.678-0.695-0.484-1.5351.397-0.961-0.504-0.857-0.523-1.269-0.1831.031NANANANA-1.9940.685NANA-0.3420.827NANA
us-gaap:DepreciationDepletionAndAmortization ▆▆▆▇▇▇▇▇▇▇████▆▅▅▅▅▅▄▄▄▄▄▄▁2.8982.8822.9563.0753.0323.0213.0013.0573.033.0233.4743.4933.5123.5662.9572.4052.4292.4172.4722.2842.1592.1692.1572.1792.1652.1230.867NANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃█▆▅▃▁▄▄▃▄▃▅▄▆▃▄▃▅▄▅▂▄▃▅▂▄▁▄▃▄▃▄▂▃▂▄▃▄▃▄▃▄▂▃▂▄17.80462.41540.26932.78219.368-1.89920.65225.13814.34220.47419.29232.5828.86541.66514.37328.60916.04732.70120.12831.0419.48126.07513.24231.0067.06521.668-4.51423.25310.46626.82910.1626.3414.22518.789.00523.82610.08426.65316.87720.95213.55322.28.83612.238.22923.291
us-gaap:NetIncomeLoss ▆█▇▇▆▂▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▃▁▃▄▃▄▃▄▃▃▃▃▄▃▄▄▃▃▄▃▄21.31734.09129.57227.07421.5543.95317.33519.79218.6118.81717.38120.30320.20316.25110.33114.51114.48114.98911.57312.86511.39513.51611.69211.76211.1649.379-3.9456.09710.4578.22412.1877.61410.0728.5258.228.6077.72910.1399.56311.51711.0368.3747.15811.0489.25211.645
us-gaap:ProfitLoss ▆█▇▇▆▂▅▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▃▁▃▄▃▄▃▄▃▃▃▃▄▃▄▄▃▃▄▄▄21.31734.09129.57227.07421.5543.95317.33519.79218.6118.81717.38120.30320.20316.25110.33114.51114.48114.98911.57312.86511.39513.51611.69211.76211.1649.379-3.9456.09710.4578.22414.9797.61410.0728.5258.228.6077.72910.1399.56311.51711.5299.2396.81211.39.77112.175
us-gaap:ShareBasedCompensation ▇▇███▇▇▆▆▇▇▇▆▅▅▅▅▅▄▅▅▄▅▅▄▃▃▃▄▄▄▃▂▃▃▃▂▁▂▂▁▁▁▁0.6860.6740.7670.7860.7720.6950.6340.5220.5710.6610.6910.6610.5090.4560.4220.480.4190.4940.3850.3980.4030.3550.4140.4140.2940.2730.2440.2650.2910.2860.340.1980.1660.2070.2080.170.0940.0390.1180.1170.0260.00.00.0NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▆█▇▆▁▄▄▃▇▅▇▇█▇▆▇▆▄▃▆▇▃▆▄▇▄▆▆▆▆▅▅▅▆█▄█▅▅▆▅▆▆▆▆-105.136-34.71200.016110.727-25.345-509.133-217.844-183.644-274.215108.873-66.40797.85778.811151.64381.29621.257.32412.917-204.003-299.194-22.437141.23-331.21623.19-169.72393.34-159.39638.46447.5746.068-5.374-103.95-131.084-127.395-11.17174.705-186.968160.593-102.624-98.651-46.443-93.63-7.33-2.25440.449-16.146
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▄▂▄▆▇█▆▇▇█▆▅▃▄▆▅▂▂▃▃▃▂▁▁▂▁▂▃▂▃▃▂▁▂▁▁▁▂▁▂▂▂▃▃▃2.1112.3961.2192.333.6274.2594.4343.5493.864.044.5813.7093.1362.0182.5433.1642.6391.2871.361.8621.6791.6481.2410.6960.6051.2230.8821.4021.5931.2851.7641.981.1130.8051.0730.6030.7770.6560.9640.7821.0771.0921.321.9821.8051.795
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▁▂▃█▅▄▄▃▃▁▂▂▂▂▂▃▅▇▃▁▆▃▄▂▅▂▄▃▃▄▄▃▃▂▅▁▄▄▃▄▃▃▃▃108.197-28.49-228.081-148.111-5.43512.548193.065140.809122.45119.877-6.238-188.434-138.418-129.189-81.49-101.128-84.53331.722154.441403.1288.615-179.826327.055-59.331132.509-92.485179.344-146.91938.991-29.936-10.03187.488121.53813.10320.823-172.795236.912-184.27681.85476.37631.72441.977-1.60522.911-40.555-21.149
us-gaap:PaymentsOfDividendsCommonStock ▇▇█▇▇▇▇▇▇▆▇▇▇▆▆▅▅▄▅▄▃▃▅▃▃▃▄▂▂▂▃▂▂▂▆▂▂▁▄▁▁▁▃▁▁▁10.77510.47612.23210.24510.23310.49411.4910.47110.45310.10711.12110.53310.5179.8088.838.2188.0087.1437.8946.3015.9945.7747.8675.8325.8265.5466.0544.1483.9543.7635.5493.5753.5693.3959.1763.4723.4662.976.2572.9612.7952.6585.3072.6752.6892.552
us-gaap:PaymentsForRepurchaseOfCommonStock ▂▃▂▁▁▅▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▃▁▁▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁▁4.58314.1275.1470.00.025.8420.8560.00.01.32547.1930.00.00.00.00.00.00.00.00.00.010.1990.00.00.00.00.00.00.00.00.00.00.01.8997.4160.00.00.00.00.0NANA0.1164.6920.00.024
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

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
Value474747474747474747474747474747404039393636343434343333262626252525252424242423232322
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 Assets0.70.70.70.70.60.70.70.70.70.80.80.80.80.70.70.70.70.70.70.70.70.70.70.70.70.70.70.80.80.80.70.70.80.80.80.80.70.80.70.70.70.7

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Common
Period End2020-12-312019-12-312018-12-312017-12-31
Value47474747
Percentage of CommonStockValue100.0100.0100.0100.0
Percentage of Assets0.70.70.80.7
Percentage of Assets srt:ParentCompany4.24.95.35.2

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value3232333333333333353535292928262625252525181818171717170.01735318170.017269
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value3232333333333333353535292928262625252525181818171717170.01734118170.017263
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value3000.0679000.0835000.0860000.0775000.0477000.0480000.0490000.084000.053000.041000.045000.052000.052000.03000.022000.095000.058000.012000.010000.03000.018000.024000.0017000.025000.016000.04000.08000.029000.03000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.651.040.890.820.650.120.510.590.550.560.50.580.580.460.330.490.490.520.430.490.430.540.460.460.440.37-0.20.320.550.440.680.430.560.480.470.50.450.580.550.70.670.490.440.670.560.7
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.651.040.890.820.650.120.510.580.550.560.50.580.570.460.330.490.490.520.430.490.430.540.460.460.440.37-0.20.320.550.440.680.420.560.480.470.50.450.580.550.70.670.490.440.670.560.7
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Tier One Risk Based Capital To Risk Weighted Assets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets dei:LegalEntity

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets

sbsi:BankSubsidiaries


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value18.410.17580.18590.18270.17980.14360.15550.20220.2060.2026
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:ConsolidatedEntities


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value16.080.15460.16290.16120.1637
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets87.387.987.688.291.0

Capital To Risk Weighted Assets

us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity

us-gaap:CapitalToRiskWeightedAssets

sbsi:BankSubsidiaries


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value19.380.1820.19340.18860.1860.15070.16130.21460.21860.2152
Percentage of CapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:ConsolidatedEntities


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value21.780.18430.19590.19220.201
Percentage of CapitalToRiskWeightedAssets112.4101.3101.3101.9108.1

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value463031333139538.634140.5791422185.5541928201.957147.37415156.831-17.2332.73166.513.583192312
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating88.754.553.054.752.164.890.315.126.11.031.949.042.113.548.367.053.75.237.524.749.646.723.2-61.110.556.922.111.361.070.839.1

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-03-312020-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4.597335.235192312-3.09610147.537
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating8.654.716.061.070.839.1-9.433.545.921.5

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeLossFromContinuingOperations

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, sbsi:AccumulatedNetGainLossFromTerminatedInterestRateSwapDerivatives


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4000.05000.04000.07000.018000.017000.017000.017000.018000.017000.017000.017000.014000.014000.014000.06000.00000
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateSwap us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome sbsi:AccumulatedNetGainLossFromTerminatedInterestRateSwapDerivatives0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-1263000.0-1239000.0-1317000.0-1258000.0-635000.074000.0167000.0377000.0491000.0510000.0411000.0303000.0244000.084000.0-53000.0-79000.0-159000.0
Percentage of IncomeLossFromContinuingOperations0.00.0-32925.0-25160.0-15875.01057.1927.82217.62888.23000.02283.31782.41435.3494.1-378.6-564.3-1135.7
Percentage of InterestAndDividendIncomeOperating-2.4-2.3-2.3-2.3-1.10.10.30.60.80.90.70.50.40.1-0.1-0.2-0.3
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateSwap us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperations us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

sbsi:SecuritiesTransferredBetweenHeldtoMaturityAndAvailableforSaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-308000.0-329000.0-369000.0-312000.0-169000.0-96000.0-105000.0-89000.0-63000.0-388000.0-407000.0522000.0-989000.0-109000.0-42000.0-318000.0-138000.0
Percentage of IncomeLossFromContinuingOperations0.00.0-9225.0-6240.0-4225.0-1371.4-583.3-523.5-370.6-2282.4-2261.13070.6-5817.6-641.2-300.0-2271.4-985.7
Percentage of InterestAndDividendIncomeOperating-0.6-0.6-0.6-0.6-0.3-0.2-0.2-0.1-0.1-0.7-0.70.9-1.7-0.2-0.1-0.7-0.3
Percentage of InterestAndDividendIncomeOperating sbsi:SecuritiesTransferredBetweenHeldtoMaturityAndAvailableforSaleSecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AvailableforsaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value11000.01583000.0-19000.062000.02103000.04377000.033000.033000.0329000.0202000.048000.0-585000.0-262000.0-653000.0-162000.0407000.0-49000.0
Percentage of IncomeLossFromContinuingOperations0.00.0-475.01240.052575.062528.6183.3194.11935.31188.2266.7-3441.2-1541.2-3841.2-1157.12907.1-350.0
Percentage of InterestAndDividendIncomeOperating0.03.0-0.00.13.67.20.10.10.50.30.1-1.0-0.5-1.1-0.30.9-0.1
Percentage of InterestAndDividendIncomeOperating us-gaap:AvailableforsaleSecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value24383330244.4322023222119222318161817171315141613131311-7.8635.854119.383137.91811109.572109.33713121514118.272151216
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating46.072.559.555.441.67.333.438.736.637.234.339.441.532.132.339.638.840.130.737.934.538.332.935.934.829.2-26.619.635.229.140.826.941.939.936.335.731.741.736.746.443.834.625.246.139.946.1

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
Value2.8874.754.2653.7832.8090.4792.8543.6613.5693.1372.5212.1923.362.15.873.93.3533.01.8392.72.83.01.4381.9711.9671.903-3.918-0.2430.8381.1591.2810.3041.7291.8541.3521.5581.6083.092.473.6293.2411.7861.463.8112.53
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 InterestAndDividendIncomeOperating5.58.97.56.84.80.84.76.05.95.34.33.85.93.711.78.47.36.74.26.66.87.03.65.25.24.9-13.2-0.82.63.63.91.06.17.15.15.55.59.77.511.19.65.64.411.68.2

us-gaap:IncomeTaxExpenseBenefit us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, sbsi:AccumulatedNetGainLossFromTerminatedInterestRateSwapDerivatives


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0010.0010.0020.0010.0040.0050.0040.0050.0040.0050.0050.0040.0080.0070.0080.0030.00.00.00.0
Percentage of IncomeTaxExpenseBenefit0.00.00.10.20.10.10.10.20.20.20.10.20.10.20.20.10.00.00.00.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateSwap us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome sbsi:AccumulatedNetGainLossFromTerminatedInterestRateSwapDerivatives0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-0.336-0.329-0.35-0.335-0.1680.0190.0450.10.130.1360.1090.0810.0650.022-0.029-0.043-0.086
Percentage of IncomeTaxExpenseBenefit-11.6-6.9-8.2-8.9-6.04.01.62.73.64.34.33.71.91.0-0.5-1.1-2.6
Percentage of InterestAndDividendIncomeOperating-0.6-0.6-0.6-0.6-0.30.00.10.20.20.20.20.10.10.0-0.1-0.1-0.2
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateSwap us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

sbsi:SecuritiesTransferredBetweenHeldtoMaturityAndAvailableforSaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-0.082-0.087-0.098-0.082-0.046-0.025-0.028-0.023-0.017-0.103-0.1080.139-0.263-0.029-0.022-0.172-0.075
Percentage of IncomeTaxExpenseBenefit-2.8-1.8-2.3-2.2-1.6-5.2-1.0-0.6-0.5-3.3-4.36.3-7.8-1.4-0.4-4.4-2.2
Percentage of InterestAndDividendIncomeOperating-0.2-0.2-0.2-0.1-0.1-0.0-0.0-0.0-0.0-0.2-0.20.2-0.5-0.1-0.0-0.4-0.2
Percentage of InterestAndDividendIncomeOperating sbsi:SecuritiesTransferredBetweenHeldtoMaturityAndAvailableforSaleSecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AvailableforsaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.0040.42-0.0050.0160.5591.1640.0090.0090.0870.0540.013-0.156-0.07-0.174-0.0870.22-0.026
Percentage of IncomeTaxExpenseBenefit0.18.8-0.10.419.9243.00.30.22.41.70.5-7.1-2.1-8.3-1.55.6-0.8
Percentage of InterestAndDividendIncomeOperating0.00.8-0.00.01.01.90.00.00.10.10.0-0.3-0.1-0.3-0.20.5-0.1
Percentage of InterestAndDividendIncomeOperating us-gaap:AvailableforsaleSecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6.00.253.04.05.00.03.04.03.50.00.02.00.00.03.02.85.50.00.00.25.50.03.253.252.00.00.00.753.050.51.31.11.60.00.02.07.22.02.53.03.50.01.14.94.650.0
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.00.00.0100.0100.0100.00.00.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0
Percentage of InterestAndDividendIncomeOperating11.40.55.37.28.50.05.06.65.80.00.03.50.00.06.06.012.00.00.00.513.40.08.18.55.30.00.02.59.51.63.93.75.70.00.07.024.56.37.69.210.40.03.415.015.10.0

Interest And Fee Income Loans And Leases

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestAndFeeIncomeLoansAndLeases


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value35363938394142434241403939383229282726252627242323231617181818181817171717161616171717161717
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating67.967.369.068.666.969.070.271.370.870.570.269.769.267.965.863.161.160.761.462.663.864.662.162.363.361.956.657.557.057.055.263.365.267.965.662.759.552.949.249.750.854.154.451.756.650.8

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value6.9397.2628.1979.091111617181717151413131111109.6089.0397.2026.716.3955.2674.9264.8454.8164.2594.124.234.3474.3534.174.3445.1015.8226.4566.8977.728.1918.6379.1579.64610111111
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating13.213.614.416.319.226.428.730.028.930.326.925.824.122.823.524.823.021.420.717.516.314.913.212.912.812.514.413.813.213.513.214.215.419.622.122.723.424.325.026.527.230.231.935.037.234.0

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value45464846474443424341424243443834353534333436343332332525272728252320202222232424242222211923
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating86.886.485.683.780.873.671.370.071.169.773.174.275.977.276.575.277.078.679.382.583.785.186.887.187.287.585.686.286.886.586.885.884.680.477.977.376.675.775.073.572.869.868.165.062.866.0

Interest Income Expense Nonoperating Net

us-gaap:InterestIncomeExpenseNonoperatingNet us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestIncomeExpenseNonoperatingNet

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, sbsi:AccumulatedNetGainLossFromTerminatedInterestRateSwapDerivatives


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5000.06000.06000.08000.022000.022000.021000.022000.022000.022000.022000.021000.022000.021000.022000.0
Percentage of InterestIncomeExpenseNonoperatingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateSwap us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome sbsi:AccumulatedNetGainLossFromTerminatedInterestRateSwapDerivatives0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


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
Value-1599000.0-1568000.0-1667000.0-1593000.0-803000.093000.0212000.0477000.0621000.0646000.0520000.0384000.0309000.0106000.0-82000.0-122000.0-245000.0
Percentage of InterestIncomeExpenseNonoperatingNet0.00.0-33340.0-26550.0-13383.31162.5963.62168.22957.12936.42363.61745.51404.5504.8-372.7-581.0-1113.6
Percentage of InterestAndDividendIncomeOperating-3.0-2.9-2.9-2.9-1.40.20.40.81.01.10.90.70.50.2-0.2-0.3-0.5
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateSwap us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6.6968.2887.1621110181619151813
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating12.715.512.620.418.129.827.832.725.730.923.5

Marketing And Advertising Expense

us-gaap:MarketingAndAdvertisingExpense

us-gaap:MarketingAndAdvertisingExpense


Marketing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value475000.0437000.0504000.0519000.0292000.0832000.0791000.0593000.0733000.0847000.0786000.0648000.0775000.0685000.0601000.0487000.0548000.0583000.0648000.0588000.0722000.0685000.0726000.0642000.0683000.0657000.0582000.0489000.0605000.0543000.0746000.0599000.0656000.0641000.0650000.0606000.0603000.0604000.0720000.0591000.0550000.0553000.0622000.0616000.0544000.0537000.0
Percentage of MarketingAndAdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.90.80.90.90.51.41.31.01.21.41.41.11.41.21.21.01.21.31.51.41.81.61.81.71.81.72.01.61.91.72.32.02.32.52.52.12.01.92.21.81.61.71.91.91.81.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21342927213.953171918181720201610141414111211131111119.379-3.9456.097108.224127.614108.5258.228.6077.729109.56311118.3747.158119.25211
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.563.652.048.636.86.528.632.730.731.930.035.535.628.420.631.231.533.426.531.327.731.429.330.829.624.3-13.320.432.625.536.925.935.732.731.130.226.332.029.235.332.726.221.833.730.033.3

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-09-302010-09-30
Value213427213.9531918181720201610141111
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.563.648.636.86.532.730.731.930.035.535.628.420.631.235.333.7
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value25-29.494223.269.47229-12.45511203418-11.669-5.352-15.672-4.3580.3088.0463.902-36.227-7.3118.43815-7.778.76-9.2075.104-8.0811.2775.4436.8289.908-0.783-27.305-5.795-11.5897.581-1.219-6.556-4.3281110
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating48.1-55.140.15.916.248.2-20.619.434.158.432.3-20.4-9.4-27.4-8.70.717.58.7-82.9-17.820.535.5-19.422.9-24.413.2-27.34.317.021.230.0-2.7-96.9-22.3-43.926.6-4.1-20.7-13.234.831.9

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value25-29.4943.269.4722911203418-11.669-5.352-15.672-4.3580.3088.0463.902-36.227-7.3118.43815-7.778.76-9.2075.104-8.0811.2775.4436.8289.908-0.783-27.305-5.795-11.5897.581-1.219-6.556-4.32811
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating48.1-55.15.916.248.219.434.158.432.3-20.4-9.4-27.4-8.70.717.58.7-82.9-17.820.535.5-19.422.9-24.413.2-27.34.317.021.230.0-2.7-96.9-22.3-43.926.6-4.1-20.7-13.234.8
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21342927213.953171918181720201610141414111211131111119.379-3.9456.097108.224147.614108.5258.228.6077.729109.56311119.2396.812119.77112
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.563.652.048.636.86.528.632.730.731.930.035.535.628.420.631.231.533.426.531.327.731.429.330.829.624.3-13.320.432.625.545.425.935.732.731.130.226.332.029.235.334.229.020.834.531.734.8

Realized Investment Gains Losses

us-gaap:RealizedInvestmentGainsLosses

us-gaap:RealizedInvestmentGainsLosses


Realized
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
Value17000.0-107000.0-249000.0-232000.01000.053000.0-70000.0-27000.087000.076000.059000.0-42000.0-42000.0-92000.0
Percentage of RealizedInvestmentGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.0-0.2-0.4-0.40.00.1-0.1-0.00.10.10.1-0.1-0.1-0.2

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
Value718269987008719073297273674865426372621761236105625063736498548455785656556354645035501951624837485647324807336834983434344534673384331232373221340032173303321031152999
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 End2020-12-312019-12-312018-12-312017-12-31
Value1135965893914
Percentage of Assets16.214.314.614.1
Percentage of Assets16.214.314.614.1
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

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
Value628861406132635165126477594457315585545953925352549856265743492850315124504549924562456147184390442442974382307632143162318632283149305629792944313729573044295228702784
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 Assets87.587.787.588.388.889.188.187.687.687.888.187.788.088.388.489.990.290.690.791.490.690.991.490.891.190.891.291.491.992.192.593.193.092.392.091.492.391.992.292.092.292.8

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value259161162160
Percentage of Liabilities4.22.73.02.8
Percentage of Assets3.72.42.62.5
Percentage of Assets srt:ParentCompany22.916.718.117.6

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
Value718269987008719073297273674865426372621761236105625063736498548455785656556354645035501951624837485647324807336834983434344534673384331232373221340032173303321031152999
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 End2020-12-312019-12-312018-12-312017-12-31
Value1135965893914
Percentage of LiabilitiesAndStockholdersEquity16.214.314.614.1
Percentage of Assets16.214.314.614.1
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value894858875839817795804810787758731752751746754556547531518472472457444447431434425291283271259239235255257276263259258258242214
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.512.312.511.711.210.911.912.412.412.211.912.312.011.711.610.19.89.49.38.69.49.18.69.28.99.28.88.68.17.97.56.97.07.78.08.67.78.17.88.07.87.1

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value875804731754
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets12.511.911.911.6
Percentage of Assets srt:ParentCompany77.183.381.982.4

us-gaap:StockholdersEquity us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value0.1490.1490.149-0.022-0.02-0.146-0.145-0.143-0.142-0.14-0.139-0.136-0.135-0.134-0.133-0.133-0.044
Percentage of StockholdersEquity0.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets0.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:PensionPlansDefinedBenefit us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-29.556-29.55-30.056-36.205-36.855-31.409-31.985-24.702-25.173-25.687-26.115-24.972-25.404-25.894-26.269-19.247-18.4
Percentage of StockholdersEquity-3.3-3.4-3.4-4.3-4.5-3.9-4.0-3.0-3.2-3.4-3.6-3.3-3.4-3.5-3.5-3.7-4.1
Percentage of Assets-0.4-0.4-0.4-0.5-0.5-0.4-0.5-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.3-0.4
Percentage of Assets us-gaap:PensionPlansDefinedBenefit us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-8.334-7.144-17.091-19.806-20.904-17.236-1.672-3.283-0.824.1537.14611109.6526.3993.8693.9574.9614.5950.0
Percentage of StockholdersEquity-0.9-0.8-2.0-2.4-2.6-2.2-0.2-0.4-0.10.51.01.61.41.30.80.70.70.90.90.0
Percentage of Assets-0.1-0.1-0.2-0.3-0.3-0.2-0.0-0.1-0.00.10.10.20.20.20.10.10.10.10.10.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value10276116102100823844315.901-31.12-55.812-42.536-35.594-16.295-11.509-11.644-20.425-23.708172616-0.2399.711.396116.238-8.656
Percentage of StockholdersEquity11.58.913.312.212.310.34.75.53.90.8-4.3-7.4-5.7-4.8-2.2-2.1-2.1-3.8-4.63.85.63.6-0.12.20.32.51.5-3.3
Percentage of Assets1.41.11.71.41.41.10.60.70.50.1-0.5-0.9-0.7-0.6-0.3-0.2-0.2-0.4-0.40.30.50.3-0.00.20.00.20.1-0.3
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value6439694643334.236164.935-15.773-50.228-68.991-57.322-51.97-36.298-26.237-26.545-34.591-38.493-2.2665.045-3.393-18.683-10.913-19.673-10.466-15.57-7.489-8.766-14.209-21.037-30.945-30.162-2.8572.938146.9468.16514
Percentage of StockholdersEquity7.34.67.95.55.34.20.52.10.6-2.1-6.9-9.2-7.6-7.0-4.8-4.7-4.9-6.5-7.4-0.51.1-0.7-4.2-2.4-4.6-2.4-3.7-2.6-3.1-5.2-8.1-12.9-12.8-1.11.15.32.63.15.7
Percentage of Assets0.90.61.00.60.60.50.10.30.1-0.3-0.8-1.1-0.9-0.8-0.6-0.5-0.5-0.6-0.7-0.00.1-0.1-0.4-0.2-0.4-0.2-0.3-0.2-0.3-0.4-0.6-0.9-0.9-0.10.10.50.20.30.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value777774771770769768766765764763762761759758757563561536535459458424424423422390389244240239214213212212195194193193176
Percentage of StockholdersEquity86.990.288.191.894.196.695.394.597.0100.7104.3101.2101.0101.6100.4101.4102.7101.0103.397.397.192.895.594.697.889.891.783.984.688.382.589.190.383.075.970.373.774.568.3
Percentage of Assets10.811.111.010.710.510.611.411.712.012.312.512.512.211.911.710.310.19.59.68.49.18.58.28.78.78.38.17.26.97.06.26.16.36.46.06.05.76.05.4
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value474747474747474747474747474747404039393636343434343333262626252525252424242423
Percentage of StockholdersEquity5.35.55.45.65.86.05.95.86.06.26.56.36.36.36.37.37.47.47.67.77.77.67.87.88.17.67.89.29.49.89.810.610.89.99.48.89.29.38.9
Percentage of Assets0.70.70.70.70.60.70.70.70.70.80.80.80.80.70.70.70.70.70.70.70.70.70.70.70.70.70.70.80.80.80.70.70.80.80.80.80.70.80.7
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value145134111937765807465576458483932251937302619494137315955656356786965587071666272
Percentage of StockholdersEquity16.215.712.711.29.48.310.09.28.37.58.97.86.55.24.44.63.57.15.85.64.210.89.48.47.413.613.022.522.421.030.328.927.723.027.425.925.324.028.1
Percentage of Assets2.01.91.61.31.10.91.21.11.00.91.11.00.80.60.50.50.30.70.50.50.41.00.80.80.71.31.21.91.81.72.32.01.91.82.22.22.01.92.2
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value-140.616-138.016-123.921-119.08-119.334-119.415-94.008-93.573-93.906-94.119-93.055-45.966-46.551-46.736-47.105-47.291-47.832-47.891-47.891-47.891-47.891-47.891-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-35.793-28.377-28.377-28.377-28.377
Percentage of StockholdersEquity-15.7-16.1-14.2-14.2-14.6-15.0-11.7-11.5-11.9-12.4-12.7-6.1-6.2-6.3-6.2-8.5-8.7-9.0-9.2-10.1-10.1-10.5-8.5-8.4-8.7-8.7-8.9-12.9-13.3-13.9-14.5-15.8-16.0-14.7-13.9-10.3-10.8-10.9-11.0
Percentage of Assets-2.0-2.0-1.8-1.7-1.6-1.6-1.4-1.4-1.5-1.5-1.5-0.8-0.7-0.7-0.7-0.9-0.9-0.8-0.9-0.9-1.0-1.0-0.7-0.8-0.8-0.8-0.8-1.1-1.1-1.1-1.1-1.1-1.1-1.1-1.1-0.9-0.8-0.9-0.9
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Tier One Risk Based Capital

us-gaap:TierOneRiskBasedCapital dei:LegalEntity

us-gaap:TierOneRiskBasedCapital

sbsi:BankSubsidiaries


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value768738714711566416384312282268
Percentage of TierOneRiskBasedCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.010.911.710.910.28.18.09.18.78.1
Percentage of Assets sbsi:BankSubsidiaries0.00.00.00.00.00.00.00.00.00.0

us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities

us-gaap:ConsolidatedEntities


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value671649626627515
Percentage of TierOneRiskBasedCapital87.488.087.788.291.1
Percentage of Assets9.69.610.29.79.3
Percentage of Assets us-gaap:ConsolidatedEntities0.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value128107108961001121101141322691201742322621981842352461691996468807177107846915457545949551501311064643474849797946385266
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.51.51.31.41.51.61.82.14.32.02.93.74.13.13.44.24.43.03.61.31.41.61.51.62.31.82.14.41.71.61.71.51.74.74.13.11.41.31.51.60.02.60.00.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value10010118.483421.766
Percentage of CashAndCashEquivalentsAtCarryingValue92.39.29.54.325.32.2
Percentage of Assets1.40.20.20.10.80.0
Percentage of Assets srt:ParentCompany8.81.11.30.90.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-31
Value12810710896100112110114132269120174198169
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.51.51.31.41.51.61.82.14.32.02.93.13.0

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
Value219221207199164159157948886
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.13.33.43.13.03.13.32.72.72.6

Furniture And Fixtures Gross

us-gaap:FurnitureAndFixturesGross

us-gaap:FurnitureAndFixturesGross


Furniture
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3944414036353627
Percentage of FurnitureAndFixturesGross100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.70.70.60.70.70.70.8

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
Value75777165585144423835
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.21.21.01.11.00.91.21.21.1

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value730000.0766000.0825000.0881000.0931000.0980000.01030000.01080000.01129000.01179000.01228000.01279000.01328000.01378000.0726000.0388000.0410000.0431000.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value142144144147147146143141140138135133132131133107105105106106107107107109110111112535352525150495049505050505050
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 Assets2.02.12.12.02.02.02.12.22.22.22.22.22.12.12.12.01.91.91.92.02.12.12.12.32.32.42.31.61.51.51.51.51.51.51.51.51.51.61.51.61.61.7

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
Value201201201201201201201201201201201201201201201919191919191919191909091222222222222222222222222222222
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 Assets2.82.92.92.82.72.83.03.13.23.23.33.33.23.23.11.71.61.61.61.71.81.81.81.91.91.91.90.70.60.60.60.60.70.70.70.70.60.70.70.70.70.7

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
Value8.2488.9789.7441011121314151617192021223.3793.7674.1774.6085.065.5346.0296.5487.097.6548.2428.8440.10.1230.1490.1780.2110.2450.2830.3240.3690.4160.4670.5220.580.6420.777
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 Assets0.10.10.10.10.20.20.20.20.20.30.30.30.30.30.40.10.10.10.10.10.10.10.10.10.20.20.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:CoreDeposits


Finite
Period End2020-12-312019-12-312018-12-31
Value6.69.513
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0
Percentage of Assets0.10.10.2
Percentage of Assets us-gaap:CoreDeposits0.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2020-12-312019-12-312018-12-31
Value3.13.84.5
Percentage of FiniteLivedIntangibleAssetsNet47.040.034.4
Percentage of Assets0.00.10.1
Percentage of Assets us-gaap:CustomerRelationships0.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-05-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value15151516176.69.6719.755109.8129.4550.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.20.20.20.20.20.00.10.10.20.20.20.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:PropertyPlantAndEquipmentByType

sbsi:OperatingLease


Operating
Period End2021-03-312021-01-312020-05-31
Value1.11.16.6
Percentage of OperatingLeaseRightOfUseAsset7.00.0100.0
Percentage of Assets0.00.00.0
Percentage of Assets sbsi:OperatingLease0.00.00.0

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
Value30232933333221231914141916121511129.8181010119.2221010111319616058595151434445444445568757
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 Assets0.40.30.40.50.50.50.30.40.30.20.20.30.30.20.20.20.20.20.20.20.20.20.20.20.20.30.41.81.71.71.71.51.51.31.41.41.31.41.41.72.81.9

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value4.7324.1864.2910
Percentage of OtherAssets16.319.530.668.7
Percentage of Assets0.10.10.10.2
Percentage of Assets srt:ParentCompany0.40.40.51.1

Time Deposit Maturities Year One

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:TimeDepositMaturitiesYearOne


Time
Period End2020-12-31
Value651
Percentage of TimeDepositMaturitiesYearOne100.0
Percentage of Assets9.3

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value257257257158158158158158158158158158310320411601621559622562558632609660536566566559528502450429442427341321335338433
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.63.73.72.22.22.22.42.42.52.62.62.45.75.77.310.811.411.112.410.911.613.012.913.715.916.216.516.215.214.813.613.313.712.610.69.710.510.914.5

Debt And Capital Lease Obligations

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DebtAndCapitalLeaseObligations


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6878559941165149210019888496287557289439381185
Percentage of DebtAndCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.812.213.815.920.514.815.113.310.112.311.915.114.718.2

us-gaap:DebtAndCapitalLeaseObligations us-gaap:DebtInstrument

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value22234171217289.626268.637368.9758.2877.8259.498
Percentage of DebtAndCapitalLeaseObligations3.22.74.26.114.62.81.03.11.44.91.20.90.80.8
Percentage of Assets0.30.30.61.03.00.40.10.40.10.60.10.10.10.1
Percentage of Assets us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FederalHomeLoanBankAdvances


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value665832952109412749729788236197195617767721017
Percentage of DebtAndCapitalLeaseObligations96.897.395.893.985.497.299.096.998.695.177.082.382.385.8
Percentage of Assets9.511.913.314.917.514.415.012.910.011.79.212.412.115.7
Percentage of Assets us-gaap:FederalHomeLoanBankAdvances0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value169.869159.618.0936.9644.8230.0
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.20.10.20.10.10.10.10.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value1518000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value1379000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value1225000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value1220000.0
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 End2020-12-31
Value14
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.2

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1717161718101010109.8110.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.20.20.20.20.20.10.20.20.20.20.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value21
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.3

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value4476000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value894858875839817795804810787758731752751746754556547531518472472457444447431434425291283271259239235255257276263259258258242214
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.512.312.511.711.210.911.912.412.412.211.912.312.011.711.610.19.89.49.38.69.49.18.69.28.99.28.88.68.17.97.56.97.07.78.08.67.78.17.88.07.87.1

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value875804731754
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets12.511.911.911.6
Percentage of Assets srt:ParentCompany77.183.381.982.4

us-gaap:StockholdersEquity us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value0.1490.1490.149-0.022-0.02-0.146-0.145-0.143-0.142-0.14-0.139-0.136-0.135-0.134-0.133-0.133-0.044
Percentage of StockholdersEquity0.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets0.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:PensionPlansDefinedBenefit us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value-29.556-29.55-30.056-36.205-36.855-31.409-31.985-24.702-25.173-25.687-26.115-24.972-25.404-25.894-26.269-19.247-18.4
Percentage of StockholdersEquity-3.3-3.4-3.4-4.3-4.5-3.9-4.0-3.0-3.2-3.4-3.6-3.3-3.4-3.5-3.5-3.7-4.1
Percentage of Assets-0.4-0.4-0.4-0.5-0.5-0.4-0.5-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.3-0.4
Percentage of Assets us-gaap:PensionPlansDefinedBenefit us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-8.334-7.144-17.091-19.806-20.904-17.236-1.672-3.283-0.824.1537.14611109.6526.3993.8693.9574.9614.5950.0
Percentage of StockholdersEquity-0.9-0.8-2.0-2.4-2.6-2.2-0.2-0.4-0.10.51.01.61.41.30.80.70.70.90.90.0
Percentage of Assets-0.1-0.1-0.2-0.3-0.3-0.2-0.0-0.1-0.00.10.10.20.20.20.10.10.10.10.10.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value10276116102100823844315.901-31.12-55.812-42.536-35.594-16.295-11.509-11.644-20.425-23.708172616-0.2399.711.396116.238-8.656
Percentage of StockholdersEquity11.58.913.312.212.310.34.75.53.90.8-4.3-7.4-5.7-4.8-2.2-2.1-2.1-3.8-4.63.85.63.6-0.12.20.32.51.5-3.3
Percentage of Assets1.41.11.71.41.41.10.60.70.50.1-0.5-0.9-0.7-0.6-0.3-0.2-0.2-0.4-0.40.30.50.3-0.00.20.00.20.1-0.3
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value6439694643334.236164.935-15.773-50.228-68.991-57.322-51.97-36.298-26.237-26.545-34.591-38.493-2.2665.045-3.393-18.683-10.913-19.673-10.466-15.57-7.489-8.766-14.209-21.037-30.945-30.162-2.8572.938146.9468.16514
Percentage of StockholdersEquity7.34.67.95.55.34.20.52.10.6-2.1-6.9-9.2-7.6-7.0-4.8-4.7-4.9-6.5-7.4-0.51.1-0.7-4.2-2.4-4.6-2.4-3.7-2.6-3.1-5.2-8.1-12.9-12.8-1.11.15.32.63.15.7
Percentage of Assets0.90.61.00.60.60.50.10.30.1-0.3-0.8-1.1-0.9-0.8-0.6-0.5-0.5-0.6-0.7-0.00.1-0.1-0.4-0.2-0.4-0.2-0.3-0.2-0.3-0.4-0.6-0.9-0.9-0.10.10.50.20.30.4
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value777774771770769768766765764763762761759758757563561536535459458424424423422390389244240239214213212212195194193193176
Percentage of StockholdersEquity86.990.288.191.894.196.695.394.597.0100.7104.3101.2101.0101.6100.4101.4102.7101.0103.397.397.192.895.594.697.889.891.783.984.688.382.589.190.383.075.970.373.774.568.3
Percentage of Assets10.811.111.010.710.510.611.411.712.012.312.512.512.211.911.710.310.19.59.68.49.18.58.28.78.78.38.17.26.97.06.26.16.36.46.06.05.76.05.4
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value474747474747474747474747474747404039393636343434343333262626252525252424242423
Percentage of StockholdersEquity5.35.55.45.65.86.05.95.86.06.26.56.36.36.36.37.37.47.47.67.77.77.67.87.88.17.67.89.29.49.89.810.610.89.99.48.89.29.38.9
Percentage of Assets0.70.70.70.70.60.70.70.70.70.80.80.80.80.70.70.70.70.70.70.70.70.70.70.70.70.70.70.80.80.80.70.70.80.80.80.80.70.80.7
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value145134111937765807465576458483932251937302619494137315955656356786965587071666272
Percentage of StockholdersEquity16.215.712.711.29.48.310.09.28.37.58.97.86.55.24.44.63.57.15.85.64.210.89.48.47.413.613.022.522.421.030.328.927.723.027.425.925.324.028.1
Percentage of Assets2.01.91.61.31.10.91.21.11.00.91.11.00.80.60.50.50.30.70.50.50.41.00.80.80.71.31.21.91.81.72.32.01.91.82.22.22.01.92.2
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value-140.616-138.016-123.921-119.08-119.334-119.415-94.008-93.573-93.906-94.119-93.055-45.966-46.551-46.736-47.105-47.291-47.832-47.891-47.891-47.891-47.891-47.891-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-37.692-35.793-28.377-28.377-28.377-28.377
Percentage of StockholdersEquity-15.7-16.1-14.2-14.2-14.6-15.0-11.7-11.5-11.9-12.4-12.7-6.1-6.2-6.3-6.2-8.5-8.7-9.0-9.2-10.1-10.1-10.5-8.5-8.4-8.7-8.7-8.9-12.9-13.3-13.9-14.5-15.8-16.0-14.7-13.9-10.3-10.8-10.9-11.0
Percentage of Assets-2.0-2.0-1.8-1.7-1.6-1.6-1.4-1.4-1.5-1.5-1.5-0.8-0.7-0.7-0.7-0.9-0.9-0.8-0.9-0.9-1.0-1.0-0.7-0.8-0.8-0.8-0.8-1.1-1.1-1.1-1.1-1.1-1.1-1.1-1.1-0.9-0.8-0.9-0.9
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value474747474747474747474747474747404039393636343434343333262626252525252424242423232322
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 Assets0.70.70.70.70.60.70.70.70.70.80.80.80.80.70.70.70.70.70.70.70.70.70.70.70.70.70.70.80.80.80.70.70.80.80.80.80.70.80.70.70.70.7

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Common
Period End2020-12-312019-12-312018-12-312017-12-31
Value47474747
Percentage of CommonStockValue100.0100.0100.0100.0
Percentage of Assets0.70.70.80.7
Percentage of Assets srt:ParentCompany4.24.95.35.2

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


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
Value777774771770769768766765764763762761759758757563561536535459458424424423422390389244240239214213212212195194193193176176178162
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.811.111.010.710.510.611.411.712.012.312.512.512.211.911.710.310.19.59.68.49.18.58.28.78.78.38.17.26.97.06.26.16.36.46.06.05.76.05.45.55.75.4

us-gaap:AdditionalPaidInCapitalCommonStock us-gaap:ConsolidatedEntities

srt:ParentCompany


Additional
Period End2020-12-312019-12-312018-12-312017-12-31
Value771766762757
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0
Percentage of Assets11.011.412.511.7
Percentage of Assets srt:ParentCompany68.079.485.382.8

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
Value145134111937765807465576458483932251937302619494137315955656356786965587071666272706164
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 Assets2.01.91.61.31.10.91.21.11.00.91.11.00.80.60.50.50.30.70.50.50.41.00.80.80.71.31.21.91.81.72.32.01.91.82.22.22.01.92.22.22.02.2

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities

srt:ParentCompany


Retained
Period End2020-12-312019-12-312018-12-312017-12-31
Value111806432
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0
Percentage of Assets1.61.21.10.5
Percentage of Assets srt:ParentCompany9.88.37.33.6

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
Value6439694643334.236164.935-15.773-50.228-68.991-57.322-51.97-36.298-26.237-26.545-34.591-38.493-2.2665.045-3.393-18.683-10.913-19.673-10.466-15.57-7.489-8.766-14.209-21.037-30.945-30.162-2.8572.938146.9468.16514177.842-6.819
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 Assets0.90.61.00.60.60.50.10.30.1-0.3-0.8-1.1-0.9-0.8-0.6-0.5-0.5-0.6-0.7-0.00.1-0.1-0.4-0.2-0.4-0.2-0.3-0.2-0.3-0.4-0.6-0.9-0.9-0.10.10.50.20.30.40.50.3-0.2

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

srt:ParentCompany


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value694.236-50.228-36.298
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0
Percentage of Assets1.00.1-0.8-0.6
Percentage of Assets srt:ParentCompany6.10.4-5.6-4.0

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
Value140138123119119119949393949345464647474747474747473737373737373737373737373528282828282828
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 Assets2.02.01.81.71.61.61.41.41.51.51.50.80.70.70.70.90.90.80.90.91.01.00.70.80.80.80.81.11.11.11.11.11.11.11.10.90.80.90.90.90.90.9

us-gaap:TreasuryStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Treasury
Period End2020-12-312019-12-312018-12-312017-12-31
Value123949347
Percentage of TreasuryStockValue100.0100.0100.0100.0
Percentage of Assets1.81.41.50.7
Percentage of Assets srt:ParentCompany10.99.710.45.1

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value686000.0674000.0786000.0772000.0695000.0522000.0571000.0661000.0691000.0661000.0509000.0456000.0422000.0480000.0419000.0494000.0385000.0398000.0403000.0355000.0414000.0414000.0294000.0273000.0244000.0265000.0291000.0286000.0340000.0198000.0166000.0207000.0208000.0170000.094000.039000.0118000.0117000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-09-30
Value686000.0674000.0786000.0772000.0695000.0522000.0571000.0661000.0691000.0661000.0509000.0456000.0422000.0480000.0419000.0494000.0385000.0398000.0403000.0355000.0414000.0414000.0294000.0273000.0244000.0265000.0291000.0286000.0340000.0198000.0166000.0207000.0208000.0170000.094000.039000.0118000.0117000.00
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1762403219-1.89920251420193228411428163220319.4812613317.06521-4.51423102610264.225189.005231026162013228.836128.22923
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating33.9116.570.858.933.1-3.134.141.523.634.733.257.050.872.828.761.634.972.946.175.523.160.633.181.118.756.1-15.277.932.683.230.889.515.072.134.183.734.384.051.564.240.269.626.937.326.766.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-105.136-34.71200110-25.345-509.133-217.844-183.644-274.215108-66.407977815181215712-204.003-299.194-22.437141-331.21623-169.72393-159.39638476.068-5.374-103.95-131.084-127.395-11.17174-186.968160-102.624-98.651-46.443-93.63-7.33-2.25440-16.146
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-199.9-64.8351.5198.9-43.3-838.1-359.9-303.3-452.0184.4-114.5171.2138.8265.1162.345.6124.628.8-467.0-727.4-54.6328.4-828.860.7-449.6241.8-538.3128.9148.318.8-16.3-353.1-465.1-489.4-42.3613.8-635.0506.3-313.3-302.1-137.7-293.5-22.3-6.9131.2-46.1

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value108-28.49-228.081-148.111-5.4351219314012219-6.238-188.434-138.418-129.189-81.49-101.128-84.533311544038.615-179.826327-59.331132-92.485179-146.91938-29.936-10.031871211320-172.795236-184.27681763141-1.60522-40.555-21.149
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating205.8-53.2-400.8-266.0-9.3843.7318.9232.5201.833.7-10.8-329.7-243.7-225.9-162.6-217.6-183.770.7353.6980.121.0-418.1818.4-155.3351.0-239.6605.6-492.4121.5-92.9-30.4297.2431.250.378.9-607.1804.7-581.0249.9233.994.1131.6-4.970.0-131.6-60.4

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value20-0.78512-4.602-11.4071.516-4.127-17.697-137.422149-53.353
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating39.7-1.521.4-8.3-19.52.5-6.8-29.2-226.5252.8-92.0

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312011-12-312011-09-302010-12-312010-09-30
Value-139000.02161000.0-125000.0650000.0120000.0-5075000.0126000.0-146000.016000.0126000.01619000.02097000.02693000.0-255000.03061000.0436000.036000.0-19000.0-148000.01410000.01318000.0-812000.0-678000.0-695000.0-484000.0-1535000.01397000.0-961000.0-504000.0-857000.0-523000.0-1269000.0-183000.01031000.0-1994000.0685000.0-342000.0827000.0
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2.8982.8822.9563.0753.0323.0213.0013.0573.033.0233.4743.4933.5123.5662.9572.4052.4292.4172.4722.2842.1592.1692.1572.1792.1652.1230.867
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1762403219-1.89920251420193228411428163220319.4812613317.06521-4.51423102610264.225189.005231026162013228.836128.22923
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating33.9116.570.858.933.1-3.134.141.523.634.733.257.050.872.828.761.634.972.946.175.523.160.633.181.118.756.1-15.277.932.683.230.889.515.072.134.183.734.384.051.564.240.269.626.937.326.766.6

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21342927213.953171918181720201610141414111211131111119.379-3.9456.097108.224127.614108.5258.228.6077.729109.56311118.3747.158119.25211
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.563.652.048.636.86.528.632.730.731.930.035.535.628.420.631.231.533.426.531.327.731.429.330.829.624.3-13.320.432.625.536.925.935.732.731.130.226.332.029.235.332.726.221.833.730.033.3

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302011-09-302010-09-30
Value213427213.9531918181720201610141111
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.563.648.636.86.532.730.731.930.035.535.628.420.631.235.333.7
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21342927213.953171918181720201610141414111211131111119.379-3.9456.097108.224147.614108.5258.228.6077.729109.56311119.2396.812119.77112
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.563.652.048.636.86.528.632.730.731.930.035.535.628.420.631.231.533.426.531.327.731.429.330.829.624.3-13.320.432.625.545.425.935.732.731.130.226.332.029.235.334.229.020.834.531.734.8

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
Value686000.0674000.0767000.0786000.0772000.0695000.0634000.0522000.0571000.0661000.0691000.0661000.0509000.0456000.0422000.0480000.0419000.0494000.0385000.0398000.0403000.0355000.0414000.0414000.0294000.0273000.0244000.0265000.0291000.0286000.0340000.0198000.0166000.0207000.0208000.0170000.094000.039000.0118000.0117000.026000.0000
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-105.136-34.71200110-25.345-509.133-217.844-183.644-274.215108-66.407977815181215712-204.003-299.194-22.437141-331.21623-169.72393-159.39638476.068-5.374-103.95-131.084-127.395-11.17174-186.968160-102.624-98.651-46.443-93.63-7.33-2.25440-16.146
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-199.9-64.8351.5198.9-43.3-838.1-359.9-303.3-452.0184.4-114.5171.2138.8265.1162.345.6124.628.8-467.0-727.4-54.6328.4-828.860.7-449.6241.8-538.3128.9148.318.8-16.3-353.1-465.1-489.4-42.3613.8-635.0506.3-313.3-302.1-137.7-293.5-22.3-6.9131.2-46.1

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.1112.3961.2192.333.6274.2594.4343.5493.864.044.5813.7093.1362.0182.5433.1642.6391.2871.361.8621.6791.6481.2410.6960.6051.2230.8821.4021.5931.2851.7641.981.1130.8051.0730.6030.7770.6560.9640.7821.0771.0921.321.9821.8051.795
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value108-28.49-228.081-148.111-5.4351219314012219-6.238-188.434-138.418-129.189-81.49-101.128-84.533311544038.615-179.826327-59.331132-92.485179-146.91938-29.936-10.031871211320-172.795236-184.27681763141-1.60522-40.555-21.149
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating205.8-53.2-400.8-266.0-9.3843.7318.9232.5201.833.7-10.8-329.7-243.7-225.9-162.6-217.6-183.770.7353.6980.121.0-418.1818.4-155.3351.0-239.6605.6-492.4121.5-92.9-30.4297.2431.250.378.9-607.1804.7-581.0249.9233.994.1131.6-4.970.0-131.6-60.4

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value101012101010111010101110109.8088.838.2188.0087.1437.8946.3015.9945.7747.8675.8325.8265.5466.0544.1483.9543.7635.5493.5753.5693.3959.1763.4723.4662.976.2572.9612.7952.6585.3072.6752.6892.552
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-302010-06-302010-03-31
Value4.583145.1470.00.0250.8560.00.01.325470.00.00.00.00.00.00.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.01.8997.4160.00.00.00.00.00.1164.6920.00.024
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.00.00.00.00.00.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.0100.0100.00.00.00.00.00.0100.0100.00.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
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
Value11.912.20.212.30.1150.108-0.0020.1560.1610.1430.0020.0970.1430.1140.040.2110.1880.167-0.010.1760.1960.18-0.0110.1440.150.169-0.182-0.0420.0740.124-0.0060.0280.1340.17
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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 End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value32.1731.5529.5926.0225.9123.7923.823.8120.4720.8720.8820.5520.5521.5918.8318.8218.82
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value169.9159.68.17.04.88.0095.0290.00.01.3590.00.03.4587.031.2550.0
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.0100.0100.0100.00.0

sbsi:ATMExpense

sbsi:ATMExpense


A
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
Value272000.0238000.0290000.0271000.0233000.0224000.0236000.0232000.0246000.0180000.0250000.0251000.0243000.0346000.0
Percentage of ATMExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:AdjustmentToPensionLiability

sbsi:AdjustmentToPensionLiability


Adjustment
Period End2020-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-8000000.0595000.0648000.0541000.01825000.0-2728000.0618000.0473000.02400000.0402000.0414000.0389000.076000.0448000.0510000.0407000.03352000.0687000.0610000.0527000.0-15274000.0257000.0285000.0229000.0-23661000.0687000.0740000.0632000.0-9867000.0495000.01478000.0-489000.09448000.0-355000.0-356000.0-355000.06470000.0-313000.0-379000.0-247000.0
Percentage of AdjustmentToPensionLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:Aggregateprincipalamountofsubordinatednotes us-gaap:LongtermDebtType

sbsi:Aggregateprincipalamountofsubordinatednotes

sbsi:A3875SubordinatedNotes


Aggregateprincipalamountofsubordinatednotesus-gaap:
Period End2020-11-06
Value100
Percentage of Aggregateprincipalamountofsubordinatednotes100.0

sbsi:A3875SubordinatedNotesDue2030


Aggregateprincipalamountofsubordinatednotesus-gaap:
Period End2020-11-06
Value100
Percentage of Aggregateprincipalamountofsubordinatednotes100.0

sbsi:AmortizationofUnrealizedGainsLossesonSecuritiesTransferredBetweenAvailableforSaleAndHeldtoMaturityDebtSecuritiesBeforeTax

sbsi:AmortizationofUnrealizedGainsLossesonSecuritiesTransferredBetweenAvailableforSaleAndHeldtoMaturityDebtSecuritiesBeforeTax


Amortizationof
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
Value-390000.0-416000.0-467000.0-394000.0-215000.0-121000.0-133000.0-112000.0-80000.0-491000.0-515000.0661000.0-1252000.0-138000.0-64000.0-490000.0-213000.0-488000.0
Percentage of AmortizationofUnrealizedGainsLossesonSecuritiesTransferredBetweenAvailableforSaleAndHeldtoMaturityDebtSecuritiesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:AmortizationofUnrealizedGainsLossesonSecuritiesTransferredBetweenAvailableforSaleAndHeldtoMaturityDebtSecuritiesBeforeTax us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

sbsi:SecuritiesTransferredBetweenHeldtoMaturityAndAvailableforSaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Amortizationof
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
Value390000.0416000.0467000.0394000.0215000.0121000.0133000.0112000.080000.0491000.0515000.0-661000.01252000.0138000.064000.0490000.0213000.0
Percentage of AmortizationofUnrealizedGainsLossesonSecuritiesTransferredBetweenAvailableforSaleAndHeldtoMaturityDebtSecuritiesBeforeTax-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

sbsi:Bookvaluepercommonshare

sbsi:Bookvaluepercommonshare


Bookvaluepercommonshare
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value26.5625.3724.7524.1123.7923.9823.3422.4821.6821.421.4321.29
Percentage of Bookvaluepercommonshare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:BorrowingsAverageAmountOutstanding us-gaap:DebtInstrument

sbsi:BorrowingsAverageAmountOutstanding

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase


Borrowings
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
Value-0.75323-20.911-24.93467690.751-0.759-1.135161.8620.3220.5938.103
Percentage of BorrowingsAverageAmountOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvances


Borrowings
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
Value-29.1727-45.592-20.222999995032-30.488816-36.614-52.48-118.798928
Percentage of BorrowingsAverageAmountOutstanding3864.53092.9218.081.1145.71430.46775.1-4226.22686.24862.9-1966.4-16298.1-20033.411460.9

sbsi:BorrowingsMaximumMonthendOutstandingAmount us-gaap:DebtInstrument

sbsi:BorrowingsMaximumMonthendOutstandingAmount

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase


Borrowings
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
Value0.0240.00.01.3592170.0040.00.028270.6880.2088.079
Percentage of BorrowingsMaximumMonthendOutstandingAmount0.0100.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvances


Borrowings
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
Value0.07230.00.00.01274720.00.010040.00.00.0957
Percentage of BorrowingsMaximumMonthendOutstandingAmount0.02947.50.00.00.0584.81822150.00.00.03544.50.00.00.011848.4

sbsi:FeeAndCommissionsDepositorAccount

sbsi:FeeAndCommissionsDepositorAccount


Fee
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
Value6.6096.1256.4196.1295.5326.2796.6476.7536.6525.9866.3256.3176.2616.1795.945.4765.255
Percentage of FeeAndCommissionsDepositorAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:FeesAndCommissionsFiduciaryAndTrustActivity

sbsi:FeesAndCommissionsFiduciaryAndTrustActivity


Fees
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
Value1496000.01383000.01354000.01253000.01221000.01305000.01685000.01523000.01520000.01541000.01573000.01568000.01931000.01760000.01156000.0873000.0899000.0
Percentage of FeesAndCommissionsFiduciaryAndTrustActivity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:FinancingReceivableNonaccrualInterestIncomeReversal

sbsi:FinancingReceivableNonaccrualInterestIncomeReversal


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value12000.018000.046000.04000.014000.0121000.0
Percentage of FinancingReceivableNonaccrualInterestIncomeReversal100.0100.0100.0100.0100.0100.0

sbsi:InterestIncomeOtherStocksAndBonds

sbsi:InterestIncomeOtherStocksAndBonds


Interest
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value845000.0627000.0391000.084000.093000.057000.026000.027000.028000.026000.026000.028000.030000.029000.027000.035000.034000.041000.039000.057000.058000.055000.054000.052000.084000.052000.053000.051000.052000.053000.053000.054000.045000.043000.014000.013000.024000.09000.07000.09000.0
Percentage of InterestIncomeOtherStocksAndBonds100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:InterestexpenseFederalHomeLoanBankAdvances

sbsi:InterestexpenseFederalHomeLoanBankAdvances


Interestexpense
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.9082.1252.3692.9293.9744.7164.6473.8994.4573.0663.1083.0073.6323.9354.1563.5513.464
Percentage of InterestexpenseFederalHomeLoanBankAdvances100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:LoansTransferredToOtherRepossessedAssetsAndRealEstateThroughForeclosure

sbsi:LoansTransferredToOtherRepossessedAssetsAndRealEstateThroughForeclosure


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value107000.0424000.0122000.0247000.042000.0338000.043000.0101000.0169000.0336000.0908000.0456000.0115000.0649000.0167000.0144000.079000.0184000.0343000.04670000.0299000.0465000.0253000.0380000.0399000.0674000.0630000.01774000.01544000.01263000.01862000.01376000.01145000.01410000.01631000.01407000.01749000.0872000.01442000.0
Percentage of LoansTransferredToOtherRepossessedAssetsAndRealEstateThroughForeclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:NoninterestIncomeExcludingNetGainLossOnSaleOfSecurities

sbsi:NoninterestIncomeExcludingNetGainLossOnSaleOfSecurities


Noninterest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value10119.5319.9571011109.282
Percentage of NoninterestIncomeExcludingNetGainLossOnSaleOfSecurities100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossandPriorServiceCostCreditReclassificationAdjustmentfromAOCIbeforeTax

sbsi:OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossandPriorServiceCostCreditReclassificationAdjustmentfromAOCIbeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-9000.0641000.0821000.0819000.0661000.0727000.0594000.0595000.0648000.0541000.0545000.0546000.0618000.0473000.0400000.0402000.0414000.0389000.0
Percentage of OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossandPriorServiceCostCreditReclassificationAdjustmentfromAOCIbeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditPlanAmendmentBeforeTax

sbsi:OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditPlanAmendmentBeforeTax


Other
Period End2020-12-312020-09-302020-06-302019-06-30
Value00163000.00
Percentage of OtherComprehensiveIncomeLossDefinedBenefitPlanPriorServiceCostCreditPlanAmendmentBeforeTax0.00.0100.00.0

sbsi:ReductionInRightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

sbsi:ReductionInRightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Reduction
Period End2020-09-30
Value89000.0
Percentage of ReductionInRightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-6103000.0-6083000.0-6337000.0-6776000.0-6673000.0-4505000.0-4504000.0-3424000.0-2498000.0-3448000.0-2800000.0-3318000.0-3499000.0-4058000.0-4137000.0-4746000.0-4189000.0-4567000.0-4881000.0-4879000.0-4856000.0-4510000.0-5083000.0-21268000.02182000.02191000.0512000.0792000.01084000.0887000.0971000.01792000.01550000.01363000.01135000.01212000.01270000.01129000.07722000.0-1059000.0-3498000.01171000.07999000.0-952000.0-3816000.01271000.0
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:BankOwnedLifeInsuranceIncome


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value645000.0626000.0655000.0680000.0650000.0569000.0582000.0622000.0559000.0544000.0554000.0552000.01185000.0632000.0632000.0636000.0635000.0634000.0649000.0656000.0647000.0674000.0640000.0661000.0653000.0669000.0393000.0320000.0307000.0314000.02277000.0327000.0264000.0254000.0330000.0260000.0254000.0266000.0252000.0288000.0261000.0286000.0288000.0297000.0285000.0285000.0
Percentage of BankOwnedLifeInsuranceIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BrokerageCommissionsRevenue

us-gaap:BrokerageCommissionsRevenue


Brokerage
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
Value850000.0780000.0628000.0564000.0499000.0580000.0531000.0555000.0477000.0517000.0499000.0532000.0506000.0450000.0632000.0561000.0682000.0547000.0466000.0551000.0535000.0575000.0555000.0540000.0472000.0639000.0
Percentage of BrokerageCommissionsRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Communication

us-gaap:Communication


Communication
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value612000.0525000.0490000.0495000.0506000.0493000.0485000.0480000.0489000.0487000.0477000.0354000.0478000.0538000.0444000.0459000.0476000.0526000.0572000.0407000.0468000.0484000.0372000.0534000.0603000.0469000.0332000.0292000.0320000.0278000.0311000.0383000.0384000.0451000.0398000.0416000.0445000.0406000.0358000.0285000.0345000.0337000.0375000.0349000.0346000.0373000.0
Percentage of Communication100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentIncomeTaxExpenseBenefit

us-gaap:CurrentIncomeTaxExpenseBenefit


Current
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312010-03-31
Value3.0262.5894.393.1332.6895.5542.7283.8073.5533.0110.9020.0950.6672.3452.8093.4543.3173.0271.9871.3311.4543.7852.1162.6662.4513.438-5.3150.7181.3422.0161.8041.5261.8950.8163.955
Percentage of CurrentIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:LongtermDebtType, us-gaap:StatementScenario, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

sbsi:A5.50SubordinatedNotesDue2026, us-gaap:ScenarioForecast, sbsi:ThreeMonthLondonInterbankOfferedRateLIBOR


Debt
Period End2021-09-29
Value0.04297
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

us-gaap:DebtInstrumentInterestRateDuringPeriod us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DebtInstrumentInterestRateDuringPeriod

sbsi:VariableRateAgreementsandFixedShorttermPayAgreements, us-gaap:CashFlowHedging


Debt
Period End2021-06-302021-03-312020-12-31
Value0.031.11-0.02
Percentage of DebtInstrumentInterestRateDuringPeriod100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value02100000.00100000.02800000.05500000.0100000.0100000.0500000.05000000.0100000.0400000.0559000.0941000.01100000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGain0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value15000.02003000.0-24000.078000.02662000.05541000.042000.042000.0416000.0256000.061000.0-741000.0-332000.0-827000.0627000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value15000.02003000.0-24000.078000.02662000.05541000.042000.042000.0416000.0256000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value052000.040000.0079000.010000.000100000.04800000.001100000.0900000.01800000.0500000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedLoss0.0100.0100.00.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPensionPlansDefinedBenefit


Defined
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
Value0-3000.0-3000.0-2000.0-3000.0-2000.0000000000000000
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Defined
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
Value-10000.0-118000.0-125000.0-125000.0-108000.0-193000.0-140000.0-139000.0-181000.0-99000.0-169000.0-169000.0-248000.0-91000.0-75000.0-75000.0-104000.0-47000.0-47000.0-46000.0-40000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.03933.34166.76250.03600.09650.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
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
Value19000.0-520000.0-694000.0-694000.0-553000.0-533000.0-457000.0-457000.0-470000.0-443000.0-378000.0-378000.0-372000.0-384000.0-328000.0-328000.0-312000.0-344000.0-410000.0-412000.0-462000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.017333.323133.334700.018433.326650.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Defined
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value2000.02000.01000.02000.01000.02000.01000.02000.02000.02000.02000.01000.01000.02000.01000.02000.01000.02000.01000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-3000.0-4000.0-4000.0-3000.0-4000.0-3000.0-4000.0-3000.0-4000.0-3000.0-4000.0-3000.0-4000.0-3000.0-3000.0-4000.0-3000.0-12000.07000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-150.0-200.0-400.0-150.0-400.0-150.0-400.0-150.0-200.0-150.0-200.0-300.0-400.0-150.0-300.0-200.0-300.0-600.0700.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets

us-gaap:OtherPensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.1256.50.0650.0725
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.1256.50.0650.0725
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:OtherPensionPlansDefinedBenefit


Defined
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
Value47000.058000.075000.075000.067000.084000.073000.074000.073000.073000.072000.073000.072000.073000.052000.053000.053000.054000.066000.066000.066000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
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
Value1273000.01437000.01344000.01344000.01320000.01668000.01507000.01508000.01511000.01504000.01620000.01621000.01622000.01620000.01512000.01513000.01513000.01512000.01307000.01306000.01257000.0
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets2708.52477.61792.01792.01970.11985.72064.42037.82069.92060.32250.02220.52252.82219.22907.72854.72854.72800.01980.31978.81904.5

us-gaap:DefinedBenefitPlanInterestCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPensionPlansDefinedBenefit


Defined
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
Value22000.024000.040000.041000.040000.041000.042000.043000.043000.041000.040000.041000.041000.041000.044000.044000.044000.045000.053000.053000.053000.0
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Defined
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
Value139000.0121000.0126000.0126000.0156000.0160000.0179000.0178000.0195000.0161000.0150000.0149000.0165000.0133000.0142000.0142000.0151000.0132000.0134000.0133000.0133000.0
Percentage of DefinedBenefitPlanInterestCost631.8504.2315.0307.3390.0390.2426.2414.0453.5392.7375.0363.4402.4324.4322.7322.7343.2293.3252.8250.9250.9

us-gaap:PensionPlansDefinedBenefit


Defined
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
Value657000.0628000.0672000.0672000.0850000.0837000.0913000.0914000.0919000.0908000.0848000.0848000.0839000.0857000.0900000.0901000.0888000.0912000.0933000.0928000.0953000.0
Percentage of DefinedBenefitPlanInterestCost2986.42616.71680.01639.02125.02041.52173.82125.62137.22214.62120.02068.32046.32090.22045.52047.72018.22026.71760.41750.91798.1

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPensionPlansDefinedBenefit


Defined
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
Value-25000.0-31000.0183000.0-32000.0-24000.0-41000.0-31000.0-31000.0-30000.0-32000.0-32000.0-32000.0-31000.0-32000.00-9000.0-9000.0-9000.0-21000.0-13000.0-13000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Defined
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
Value149000.0239000.0402000.0402000.0323000.0440000.0405000.0403000.0487000.0322000.0394000.0393000.0499000.0288000.0280000.0280000.0329000.0232000.0234000.0233000.0230000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-596.0-771.0219.7-1256.2-1345.8-1073.2-1306.5-1300.0-1623.3-1006.2-1231.2-1228.1-1609.7-900.00.0-3111.1-3655.6-2577.8-1114.3-1792.3-1769.2

us-gaap:PensionPlansDefinedBenefit


Defined
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
Value-635000.0-289000.0501000.0501000.0635000.0122000.0214000.0215000.0268000.0160000.0-11000.0-11000.0-25000.02000.062000.062000.025000.098000.0377000.0369000.0510000.0
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost2540.0932.3273.8-1565.6-2645.8-297.6-690.3-693.5-893.3-500.034.434.480.6-6.20.0-688.9-277.8-1088.9-1795.2-2838.5-3923.1

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Defined
Period End2020-12-312020-09-302020-06-302019-06-30
Value00-12000.00
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments0.00.0100.00.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312020-09-302020-06-302019-06-30
Value00-151000.00
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments0.00.01258.30.0

us-gaap:DefinedBenefitPlanServiceCost us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Defined
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value149000.0149000.046000.085000.085000.084000.0110000.060000.073000.073000.084000.063000.062000.061000.073000.051000.052000.052000.056000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value482000.0483000.0405000.0423000.0355000.0355000.0394000.0316000.0387000.0387000.0390000.0384000.0350000.0349000.0341000.0358000.0344000.0347000.0316000.0
Percentage of DefinedBenefitPlanServiceCost323.5324.2880.4497.6417.6422.6358.2526.7530.1530.1464.3609.5564.5572.1467.1702.0661.5667.3564.3

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10101010101010101110109.8088.838.2188.0087.1437.8946.3015.9945.7747.8675.8325.8265.5466.0544.1483.9543.7635.5493.5753.5693.3959.1763.4729.406-2.97-6.257-2.961-2.795-2.658-5.307-2.675-2.689-2.552
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value10101010101010101110109.8088.838.2188.0087.1437.8946.3015.9945.7747.8675.8325.8265.5466.0544.1483.9543.7635.5493.5753.5693.3959.1763.4729.406-2.97-6.257-2.961-2.795-2.658-5.307-2.675-2.689-2.552
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FederalDepositInsuranceCorporationPremiumExpense


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value435000.0454000.0456000.0469000.0174000.025000.000437000.0422000.0455000.0435000.0484000.0497000.0442000.0441000.0445000.0441000.0215000.0643000.0645000.0638000.0619000.0624000.0629000.0638000.0446000.0437000.0434000.0448000.0450000.0433000.0409000.0421000.0431000.0429000.0414000.0470000.0107000.0212000.0735000.0763000.0737000.0804000.0689000.0679000.0
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value61000.0173000.0193000.0357000.0110000.0544000.02840000.0581000.01956000.01946000.0
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-63000.037000.0-96000.0218000.0169000.0222000.0172000.0312000.07000.0421000.0
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery-103.321.4-49.761.1153.640.86.153.70.421.6

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1000.0-8000.0-1000.0-12000.0-48000.02317000.0-21000.01642000.01196000.0
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery-1.6-4.1-0.3-10.9-8.881.6-3.683.961.5

us-gaap:ConstructionLoans


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0-1000.0-16000.06000.0022000.00-12000.000
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery0.0-0.6-8.31.70.04.00.0-2.10.00.0

us-gaap:ConsumerLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value109000.0119000.0238000.0125000.0-33000.0298000.0289000.0318000.0310000.0314000.0
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery178.768.8123.335.0-30.054.810.254.715.816.1

us-gaap:ResidentialRealEstate


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value16000.018000.075000.09000.0-14000.050000.062000.0-16000.0-3000.015000.0
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery26.210.438.92.5-12.79.22.2-2.8-0.20.8

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery


Financing
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
Value466000.0622000.0402000.0361000.0436000.0451000.0411000.0419000.0441000.0339000.0381000.0707000.0488000.0471000.0273000.0347000.0498000.0530000.0539000.0711000.0645000.0887000.0458000.0605000.0521000.0872000.0422000.0556000.0517000.0545000.0998000.0860000.0512000.0617000.0457000.0451000.0-718000.0712000.0534000.0505000.0-792000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value179000.0282000.0119000.061000.056000.074000.015000.082000.0123000.030000.077000.0105000.019000.043000.012000.089000.0100000.0111000.0235000.0344000.066000.021000.029000.040000.055000.029000.032000.028000.053000.058000.043000.080000.060000.050000.041000.018000.055000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery38.445.329.616.912.816.43.619.627.98.820.214.93.99.14.425.620.120.943.648.410.22.46.36.610.63.37.65.010.310.64.39.311.78.19.04.0-7.7

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1000.08000.013000.012000.069000.054000.021000.019000.019000.025000.05000.04000.02000.02000.02000.03000.06000.06000.06000.05000.06000.07000.05000.07000.066000.02000.02000.01000.03000.01000.0328000.05000.05000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.22.03.62.815.313.15.04.35.66.60.70.80.40.70.60.61.11.10.80.80.71.50.81.37.60.50.40.20.60.138.11.00.8

us-gaap:ConstructionLoans


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value01000.017000.00011000.0012000.0007000.0000001000.00000269000.081000.034000.049000.043000.049000.048000.047000.012000.028000.027000.05000.017000.051000.023000.026000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.00.24.20.00.02.40.02.90.00.01.80.00.00.00.00.00.20.00.00.00.030.317.75.69.44.911.68.69.12.22.83.11.02.811.25.1-3.6

us-gaap:ConsumerLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value274000.0284000.0255000.0278000.0352000.0293000.0320000.0264000.0296000.0287000.0268000.0266000.0458000.0412000.0253000.0246000.0392000.0412000.0297000.0354000.0322000.0461000.0335000.0443000.0395000.0723000.0335000.0433000.0390000.0466000.0920000.0351000.0435000.0541000.0358000.0402000.0481000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery58.845.763.477.080.765.077.963.067.184.770.337.693.987.592.770.978.777.755.149.849.952.073.173.275.882.979.477.975.485.592.240.885.087.778.389.1-67.0

us-gaap:ResidentialRealEstate


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value12000.055000.03000.09000.016000.04000.022000.040000.03000.03000.04000.0331000.07000.014000.06000.010000.02000.01000.01000.07000.03000.0130000.06000.083000.015000.011000.04000.045000.026000.06000.06000.074000.07000.04000.06000.06000.0155000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery2.68.80.72.53.70.95.49.50.70.91.046.81.43.02.22.90.40.20.21.00.514.71.313.72.91.30.98.15.01.10.68.61.40.61.31.3-21.6

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs


Financing
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
Value0.5270.7950.5950.7180.5460.9953.2511.02.3972.2851.90.6620.9170.7670.6340.6771.0881.0540.6861.257111.141.0751.3010.8931.0863.832103.5464.7684.2033.5142.7053.1522.9653.062-2.7722.232.2273.179-3.023
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.1160.3190.0230.2790.2250.2960.1870.3940.130.4510.4860.0130.1720.0850.0730.0730.5740.0030.00.452100.2730.1510.0780.050.0570.0010.060.0050.00.220.0940.1270.0710.00.0270.287
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs22.040.13.938.941.229.75.839.45.419.725.62.018.811.111.510.852.80.30.036.094.223.914.06.05.65.20.00.60.10.05.22.74.72.30.00.9-10.4

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.00.0120.00.0212.3710.01.6611.2150.7830.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0210.046
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.01.70.02.172.90.069.353.241.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.81.5

us-gaap:ConstructionLoans


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.0010.0060.00.0330.00.00.00.00.00.00.00.0140.00.00.0170.0180.00.00.00.00.0240.00.00.00.00.00.00.0140.00.00.00.00.0260.00.007
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.20.80.03.30.00.00.00.00.00.00.01.80.00.01.61.70.00.00.00.02.20.00.00.00.00.00.00.30.00.00.00.00.90.0-0.3

us-gaap:ConsumerLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.3830.4030.4930.4030.3190.5910.6090.5820.6060.6010.6050.6410.6880.6680.5560.5930.4960.7460.6650.7810.6540.8480.6531.2090.8031.0233.831103.5414.7323.8923.422.5572.8072.8212.9012.343
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs72.750.782.956.158.459.418.758.225.326.331.896.875.087.187.787.645.670.896.962.15.874.460.792.989.994.2100.099.499.999.292.697.394.589.195.194.7-84.5

us-gaap:ResidentialRealEstate


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.0280.0730.0780.0180.0020.0540.0840.0240.00.0180.0260.0080.0570.00.0050.0110.0010.2870.00.0240.00.019-0.0020.0140.040.0060.00.00.00.0220.0910.00.00.2280.0580.1280.042
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs5.39.213.12.50.45.42.62.40.00.81.41.26.20.00.81.60.127.20.01.90.01.7-0.21.14.50.60.00.00.00.52.20.00.07.22.04.2-1.5

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.1060.1480.346-0.0340.1480.0620.4380.1950.6067.812
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.1060.0180.324-0.0330.1480.0030.4820.1810.4850.057
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.012.293.697.1100.04.8110.092.880.00.7

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0-0.0010.00.059-0.044-0.0350.0967.627
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.02.90.095.2-10.0-17.915.897.6

us-gaap:ResidentialRealEstate


Financing
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.0020.13-0.0020.014-0.0020.113
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2-1.987.8-0.57.2-0.31.4

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanRestructuringModification

us-gaap:CommercialLoan, sbsi:CombinationofConcessionsGrantedinLoanRestructuringModification


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.1060.0180.273-0.0330.1480.0030.4840.1810.4850.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.012.278.997.1100.04.8110.592.880.00.0

us-gaap:CommercialRealEstatePortfolioSegment, sbsi:CombinationofConcessionsGrantedinLoanRestructuringModification


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0-0.0010.00.059-0.001-0.0020.0960.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.02.90.095.2-0.2-1.015.80.0

us-gaap:ResidentialRealEstate, sbsi:CombinationofConcessionsGrantedinLoanRestructuringModification


Financing
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.0020.13-0.0020.014-0.0020.113
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2-1.987.8-0.57.2-0.31.4

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:LoanRestructuringModification

sbsi:CombinationofConcessionsGrantedinLoanRestructuringModification


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.1060.1480.295-0.0340.1480.0620.4790.1950.6060.128
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.0100.085.3100.0100.0100.0109.4100.0100.01.6

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1


Financing
Period End2021-06-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-06-30
Value230000.001400000.0-102000.0729000.000-117000.0117000.0000048000.00
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1100.00.0100.0100.0100.00.00.0100.0100.00.00.00.00.0100.00.0

us-gaap:GainLossOnDispositionOfAssets

us-gaap:GainLossOnDispositionOfAssets


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-75000.0-227000.0-56000.0-762000.0-101000.042000.0-334000.0-38000.0-215000.0-5000.0-389000.0-247000.0-97000.0-35000.0-75000.0-22000.0-55000.00-141000.0-254000.0019000.0-373000.0-74000.01000.0-138000.00-21000.007000.0-4000.0-4000.0001000.0
Percentage of GainLossOnDispositionOfAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.00.00.0100.0

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainLossOnSalesOfLoansNet


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value393000.0593000.0848000.01071000.0683000.0170000.0104000.0131000.0181000.093000.0101000.0303000.0173000.0115000.0268000.0347000.0505000.0701000.0461000.0818000.0873000.0643000.0578000.0305000.0822000.0377000.054000.0108000.081000.080000.080000.0130000.0241000.0319000.0376000.0314000.0298000.0131000.0263000.0402000.0282000.0283000.0554000.0517000.0399000.0281000.0
Percentage of GainLossOnSalesOfLoansNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainsLossesOnSalesOfOtherRealEstate

us-gaap:GainsLossesOnSalesOfOtherRealEstate


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-302010-06-302010-03-31
Value02000.0-22000.0-120000.0-8000.0-1000.07000.03000.0-2000.092000.0-22000.0-153000.0-191000.0-67000.0-8000.001000.005000.0-77000.05000.0-152000.0-43000.0-5000.0-110000.0-272000.0-72000.00-10000.0-55000.00-13000.093000.0-21000.021000.01000.0-3000.00540000.0-21000.0-127000.0-14000.0-27000.015000.0
Percentage of GainsLossesOnSalesOfOtherRealEstate0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9.158-11.278.269-6.4149.784-1.3835.969-2.6845.15-7.274.831-4.6446.436-7.8276.454-4.4284.947-6.917.725-4.7365.646-6.1525.557-5.5236.022-5.7925.24-6.2915.059-6.525.272-4.1827.273-5.3264.208-3.2013.994-5.491-0.6833.4461.448-2.818-3.8662.3194.232-3.134
Percentage of IncreaseDecreaseInAccruedInterestReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet

us-gaap:IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.468-0.857-18.396-29.737-146.59518918-16.43817-28.173270.6880.462-1.6730.4150.6590.610.717-4.4190.4518.5640.0720.1590.186-0.043-2.110.1210.0590.1431.0550.0010.0010.0-0.127-0.484-0.480.022-1.019-0.052-0.080.096-0.8630.0330.038-3.397-6.155
Percentage of IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInInterestPayableNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value242000.0-1026000.0439000.0-2269000.0630000.0-2034000.0514000.0-1601000.01938000.0-321000.02096000.0-1086000.01466000.0-1219000.01493000.0-983000.01583000.0-1523000.01608000.0348000.087000.0291000.0101000.080000.014000.0-66000.0-30000.0-29000.0-5000.0-35000.03000.034000.0-237000.0-244000.0-327000.0-101000.0-169000.0-289000.0-27000.0-286000.0-166000.0-409000.0-183000.0-148000.0-118000.0-430000.0
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1.95-6.459-29.085250.4869.318-3.005153.394-3.3050.49418-14.737-1.8756.605-0.2174.94-7.419-3.917-0.5053.189-0.591.799-0.0541.494-3.5643.3880.7261.4560.0032.422-0.1877.957-0.84-0.91.1980.964-0.9914.6670.18-4.8922.29913-3.213-0.461-1.052
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-7.47710-19.99625-4.274-17.003-5.75310-4.154-14.373-6.28116-13.9855.5013.5761.296-0.558-5.3771.3384.054-3.1151.243-0.7112.537-0.459-3.142-0.4661.5870.0243.332-2.4792.5922.252-2.183-2.2690.71-5.623.227-1.2021.2341.0081.356-1.9380.705-1.5814.38
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
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
Value167000.0108000.0-1000.051000.067000.0114000.02000.0128000.0150000.0149000.0-10000.0174000.0171000.0178000.01000.0200000.0201000.0208000.014000.0153000.0119000.066000.01000.085000.088000.081000.00101000.093000.084000.06000.049000.032000.020000.0014000.012.013000.01000.07000.06.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InformationTechnologyAndDataProcessing


Information
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
Value1406000.01312000.01220000.01215000.01295000.01227000.01259000.01116000.01086000.01076000.01057000.0977000.0939000.01023000.0882000.0732000.0688000.0725000.0687000.0736000.0739000.0749000.0771000.0819000.01237000.01031000.03099000.0543000.0486000.0501000.0503000.0528000.0444000.0543000.0
Percentage of InformationTechnologyAndDataProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value52535655586060606059585756575046464443414143393837382929323233292826262829313232333132323034
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndOtherIncome

us-gaap:InterestAndOtherIncome


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
Value16171717181817161616161616171616171616151414151413141212131317109.7268.2589.011101114161616
Percentage of InterestAndOtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseDeposits


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.3392.5973.6384.8626.2299.91910111111109.4978.5817.4515.8975.425.1384.2813.883.6043.5153.2562.6552.4852.4932.5291.9771.8761.9842.1162.0972.0112.0012.072.2262.4552.7653.3953.6813.8794.0514.0364.3574.8744.7335.005
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm

us-gaap:InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm


Interest
Period End2021-06-302020-06-30
Value1817000.02929000.0
Percentage of InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm100.0100.0

us-gaap:InterestExpenseJuniorSubordinatedDebentures

us-gaap:InterestExpenseJuniorSubordinatedDebentures


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value349000.0351000.0360000.0378000.0491000.0600000.0643000.0685000.0718000.0729000.0699000.0684000.0658000.0569000.0532000.0520000.0494000.0467000.0
Percentage of InterestExpenseJuniorSubordinatedDebentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseOther

us-gaap:InterestExpenseOther


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value11000.011000.023000.055000.0163000.0147000.071000.059000.057000.075000.081000.030000.033000.011000.05000.04000.04000.03000.0
Percentage of InterestExpenseOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseSubordinatedNotesAndDebentures

us-gaap:InterestExpenseSubordinatedNotesAndDebentures


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2423000.02395000.02051000.01427000.01412000.01411000.01426000.01425000.01410000.01400000.01431000.01423000.01407000.01398000.01429000.01413000.01398000.01393000.0
Percentage of InterestExpenseSubordinatedNotesAndDebentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value43565451421940414042394141403734343432323034323132292220252328212120181820202222222017181719
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeOther

us-gaap:InterestIncomeOther


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value17000.015000.018000.017000.023000.0180000.0247000.0206000.0450000.0433000.0508000.0491000.0471000.0448000.0441000.0527000.0378000.031000.022000.043000.015000.035000.043000.04000.09000.0
Percentage of InterestIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesCorporateDebtOperating

us-gaap:InterestIncomeSecuritiesCorporateDebtOperating


Interest
Period End2021-06-302020-06-30
Value986000.084000.0
Percentage of InterestIncomeSecuritiesCorporateDebtOperating100.0100.0

us-gaap:InterestIncomeSecuritiesMortgageBacked

us-gaap:InterestIncomeSecuritiesMortgageBacked


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4.6476.0886.6937.0489.0441112121312101010109.9311010109.2949.3999.3669.3919.2158.3187.6668.4626.8986.077.5577.6826.45.0694.683.9364.3886.6958.872121313131112131014
Percentage of InterestIncomeSecuritiesMortgageBacked100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesStateAndMunicipal

us-gaap:InterestIncomeSecuritiesStateAndMunicipal


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
Value1010109.7879.8696.6255.0734.1673.5274.1185.8956.3316.3536.3816.1495.676.1576.5546.6955.4675.1375.3555.4095.555.6455.875.7446.3326.0315.97115.5694.8994.0484.2083.8472.9682.6743.0233.0733.215
Percentage of InterestIncomeSecuritiesStateAndMunicipal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxExempt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9.1738.9658.9869.0039.2216.2065.0444.1673.5274.1185.8956.3316.3536.3816.1485.676.1576.5546.6955.4675.1375.3555.4085.5515.6445.8655.7346.3256.0215.958115.5564.8773.9584.1773.8392.9612.6673.0133.0693.2093.2292.682.3663.0172.826
Percentage of InterestIncomeSecuritiesTaxExempt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesTaxable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2921000.02323000.01753000.01175000.0732000.0512000.086000.026000.027000.028000.0103000.036000.051000.0227000.0237000.058000.0267000.0377000.0485000.0251000.0107000.0214000.0416000.0475000.0459000.0237000.0139000.0210000.0143000.0123000.0127000.0139000.0169000.0364000.0446000.022000.020000.031000.015000.011000.020000.018000.019000.020000.026000.026000.0
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesUSTreasuryAndOtherUSGovernment

us-gaap:InterestIncomeSecuritiesUSTreasuryAndOtherUSGovernment


Interest
Period End2021-06-302021-03-31
Value169000.037000.0
Percentage of InterestIncomeSecuritiesUSTreasuryAndOtherUSGovernment100.0100.0

us-gaap:InvestmentIncomeNetAmortizationOfDiscountAndPremium

us-gaap:InvestmentIncomeNetAmortizationOfDiscountAndPremium


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value460000.0223000.0260000.0441000.0162000.0244000.0155000.0116000.0502000.0438000.0312000.0309000.0655000.01057000.0324000.0141000.0387000.0290000.0407000.0433000.0881000.0799000.0681000.0466000.01034000.0565000.0-61000.0
Percentage of InvestmentIncomeNetAmortizationOfDiscountAndPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value20201919181919181718171716181514141516151417161516182112131312131313121112111011111110101110
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetChangeInterestAndNoninterestBearingDepositsDomestic

us-gaap:NetChangeInterestAndNoninterestBearingDepositsDomestic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value63160-170.747323315619111-88.715157-133.82334-133.23812651-59.922-50.025140-48.32211-48.821164127-140.496-26.338121129
Percentage of NetChangeInterestAndNoninterestBearingDepositsDomestic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value30313131293030292929302829312925252525282529282627293720202019202120191919181717181818171717
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncome

us-gaap:NoninterestIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1013101112151011119.5381010119.619.3489.4089.2939.6739.389119.37118.6119.1168.419115.9795.0196.5155.8068.2286.55211106.259108.062106.02410109.6368.577141314
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:NoninterestIncomeOtherOperatingIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value925000.02113000.01020000.01366000.0946000.01054000.0874000.01485000.01449000.0601000.01021000.01491000.01283000.01301000.0720000.0888000.01392000.01465000.01730000.01162000.0619000.01323000.0-177000.01227000.01099000.01644000.01255000.01021000.01073000.0983000.01161000.01334000.0953000.0891000.0870000.01205000.01123000.01111000.0929000.0957000.0959000.01105000.0861000.0931000.0864000.0933000.0
Percentage of NoninterestIncomeOtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet

us-gaap:OccupancyNet


Occupancy
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.6063.563.7953.5953.6683.3113.2343.433.2893.1753.4753.3963.363.5833.3272.9812.8972.8632.8254.5692.9933.3353.763.0712.5933.4591.9461.7731.7861.7541.8491.9221.8971.8711.9091.981.8511.7581.841.8661.7781.7211.7551.721.6621.643
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal

us-gaap:OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal


Off
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value157000.0-2770000.0366000.0-345000.0-1095000.01200000.0-85000.0-319000.025000.056000.0
Percentage of OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value33-48.9792561
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.2150.00.1630.00.00.00.00.00.00.00.00.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax100.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.9650.0-7.5580.0-9.8160.00.00.0-1.9940.00.00.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax3239.50.0-4636.80.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


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
Value-3.104111.774-0.197-5.439-19.62.274-2.619-5.653-3.12-5.5131.8941.7254.2452.087-0.236-1.768
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax0.00.0825.10.0-3336.80.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value33-48.979161.6012561-8.67517324630-16.885-10.371-25.501-3.2330.344134.885-66.73-10.961627-15.10213-14.6719.8023.8373.0338.58610-5.782-1.983-38.218-5.356-3.853150.917
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax0.00.07881.40.015836.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value30-37.956251.4041241-16.21714264323-14.991-8.646-21.256-6.3560.108115.078-59.611-9.8913-12.54213-14.915
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax0.00.012046.00.07962.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value32-37.334284.1261137-15.76614264323-14.771-6.775-19.838-5.5830.474126.003-55.734-11.2481223-11.95413-14.1667.853-12.6072.1398.3731015-1.203-42.008-8.916-17.82811-1.875-10.087-6.6591716
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax


Other
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-3104000.0-197000.0-5439000.0-19600000.0-2619000.0-5653000.0-3120000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax


Other
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-1599000.0-1587000.0-797000.0101000.0499000.0642000.0668000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.171-0.0020.126-0.001-0.002-0.001-0.002-0.001-0.003-0.001-0.001-0.001
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.0060.5066.1490.65-5.4460.576-7.2830.4710.5140.428-1.1430.4320.490.375
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.00.03595.9-32500.0-4322.2-57600.0364150.0-47100.0-25700.0-42800.038100.0-43200.0-49000.0-37500.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


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
Value-1.199.9472.7151.098-3.668-15.5641.611-2.463-4.973-2.993-4.7831.1761.1013.2531.396-0.088-1.004
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.00.01587.7-54900.0-2911.11556400.0-80550.0246300.0248650.0299300.0159433.3-117600.0-110100.0-325300.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value26-39.947131.5141844-6.78113253724-13.276-6.942-19.299-1.8980.1358.7813.283-41.46-8.6371016-9.9498.314-9.6044.7621.6641.2935.2586.679-1.244-28.145-5.9757.207-1.547-7.069
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.00.08055.0-75700.014650.8-4429200.0339050.0-1374900.0-1258450.0-3702100.0-823066.71327600.0694200.01929900.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value25-29.494223.269.47229-12.45511203418-11.669-5.352-15.672-4.3580.3088.0463.902-36.227-7.3118.438-7.778.76-9.207
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.00.013338.6-163000.07517.5-2930300.0622750.0-1175600.0-1035400.0-3445500.0-625433.31166900.0535200.01567200.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax


Other
Period End2020-12-312020-09-302020-06-302019-06-30
Value6.9650.0-7.5580.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax100.00.0100.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.0152.003-0.0240.0782.6625.5410.0420.0420.4160.2560.061-0.741-0.332-0.827-0.2490.627-0.0750.322-2.6762.3430.7282.4410.2040.8750.1052.4761.171.1510.4980.011-0.942-0.0035.0524.3454.3954.3023.297
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax


Other
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-1568000.0101000.0234000.0499000.0642000.0668000.0542000.0406000.0331000.0127000.0-82000.0-122000.0-245000.0-379000.0-477000.0-521000.0-460000.0-357000.000
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherComprehensiveIncomeLossTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value6.726-7.846.0640.8662.5187.789-3.3113.1255.5059.1594.988-3.102-1.423-4.166-1.2250.1664.3322.101-19.507-3.9374.5448.233-4.1844.718-4.9592.749-4.5260.8622.933.6775.334-0.42-14.703-3.121-6.2394.081-0.656-3.531-2.3316.1145.7971.735
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0430.00.0340.0-0.0010.0-0.0010.00.0010.0-0.001-0.001
Percentage of OtherComprehensiveIncomeLossTax0.70.01.40.00.00.0-0.00.00.0-0.00.10.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.0030.1351.6380.171-1.4480.152-1.9360.1250.1370.114-0.3040.1150.130.1
Percentage of OtherComprehensiveIncomeLossTax-0.0-1.727.019.7-57.52.058.54.02.51.2-6.1-3.7-9.1-2.4

us-gaap:OtherComprehensiveIncomeLossTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


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
Value-0.3152.6440.7210.292-0.974-4.1370.429-0.655-1.322-0.795-1.2720.3120.2930.8650.751-0.047-0.541
Percentage of OtherComprehensiveIncomeLossTax-4.7-33.711.933.7-38.7-53.1-13.0-21.0-24.0-8.7-25.5-10.1-20.6-20.8-61.3-28.3-12.5

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value7.044-10.6193.6620.4034.90611-1.8033.6556.6919.846.563-3.529-1.845-5.13-1.0220.0724.7281.768-22.325-4.655.4628.876-5.3574.477-5.1722.5641.0030.5892.833.597-2.044-0.669-15.155-3.217-2.8863.88-0.833-3.807
Percentage of OtherComprehensiveIncomeLossTax104.7135.460.446.5194.8151.254.5117.0121.5107.4131.6113.8129.7123.183.443.4109.184.2114.4118.1120.2107.8128.094.9104.393.3-22.268.396.697.8-38.3159.3103.1103.146.395.1127.0107.8

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value6.726-7.846.0640.8662.5187.789-3.3113.1255.5059.1594.988-3.102-1.423-4.166-1.2250.1664.3322.101-19.507-3.9374.544-4.1844.718-4.959
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax


Other
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value11-19.62.274-2.619-5.653-3.12-5.5131.8941.7254.2452.087-0.236-1.768-0.08101.07-3.134-2.2440.00.00.00.0
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1.6012561-8.67517324630-16.885-10.371-37.783-3.2330.344134.885-56.49-10.961627-15.28613-14.9159.523.2682.7518.30810-5.677-1.96-37.666-5.215-3.566150.863-4.8865.5042020
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInterestAndDividendIncome

us-gaap:OtherInterestAndDividendIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value108000.0136000.0199000.0249000.0360000.0425000.0437000.0422000.0440000.0355000.0393000.0377000.0411000.0414000.0380000.0329000.0299000.0298000.0210000.0186000.0185000.0217000.075000.065000.065000.093000.037000.036000.038000.070000.047000.036000.034000.065000.050000.057000.054000.079000.051000.050000.052000.080000.059000.059000.059000.082000.0
Percentage of OtherInterestAndDividendIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense

us-gaap:OtherNoninterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2.1192.9073.143.8663.0462.593.3612.5153.3312.9013.3382.7333.0563.1560.7763.4923.6292.9352.9344.2633.0363.7353.6573.5273.7683.8353.4572.2262.0972.3123.2672.2842.1242.1911.741.7451.7331.5091.9191.5591.2911.811.7121.5211.6471.635
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value11142128216.6514.5626.3056.9294.0274.1276.4066.5575.6027.8821014201723251917181816
Percentage of PaymentsForOriginationAndPurchasesOfLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value126000.026000.0214000.041000.096000.042000.0131000.014000.0175000.074000.0123000.06000.079000.040000.085000.05000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value26512710928683214412372
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireFederalReserveStock

us-gaap:PaymentsToAcquireFederalReserveStock


Payments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value9.6290.206-0.0620.8844.6614.9790.2949.659110.3440.260.2760.6380.4720.2840.2560.2219.2344.1980.0640.1717.6028.6543.5740.023.0741.4570.3520.0321.2846.2051.7382.7680.2561.5793.6867.0716.5875.1831.3814.2422.7610.0340.0690.036
Percentage of PaymentsToAcquireFederalReserveStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireFinanceReceivables

us-gaap:PaymentsToAcquireFinanceReceivables


Payments
Period End2021-03-312020-03-31
Value5933
Percentage of PaymentsToAcquireFinanceReceivables100.0100.0

us-gaap:PaymentsToAcquireLifeInsurancePolicies

us-gaap:PaymentsToAcquireLifeInsurancePolicies


Payments
Period End2020-09-30
Value0.0
Percentage of PaymentsToAcquireLifeInsurancePolicies0.0

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3070400911661508818003247254614091402155616328516081110420735906725161027328992916916154133219522761621812025064767762695850942345034276168296452654656227410742830185730581203
Percentage of ProceedsFromFederalHomeLoanBankBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan

us-gaap:ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value330000.0332000.0404000.0337000.0336000.0347000.0388000.0353000.0349000.0355000.0389000.0369000.0367000.0353000.0385000.0377000.0368000.0353000.0419000.0344000.0334000.0314000.0
Percentage of ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSubordinatedLongTermDebt

us-gaap:ProceedsFromIssuanceOfSubordinatedLongTermDebt


Proceeds
Period End2021-03-312017-12-312016-12-312015-12-31
Value-0.0590.0-0.0230.0
Percentage of ProceedsFromIssuanceOfSubordinatedLongTermDebt100.00.0100.00.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value82991211281078086543030154424532624322946625047526880775760767692108918782116105582521.585-65.608793397.467-89.96299
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.349106.2245.415140.3526.0246.0950.309150.4080.8890.5451.2223.519143.0118.3059.222124.0385.1685.3286.5837.354.0613.0064.0864.9349.86317326057453416151210101219171918
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value9.623376.10315013514277436
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfFederalReserveStock

us-gaap:ProceedsFromSaleOfFederalReserveStock


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1611200.00.00.00.00.08.7880.0100.0136.8310.00.0330.0810.00.00.03.6440.02.9115.6920.01.4352.4992.1726.7660.00.5770.05.2426.3061.9741.7598.5331.7751.655.0739.7384.180.00.2782.36
Percentage of ProceedsFromSaleOfFederalReserveStock100.0100.0100.00.00.00.00.00.0100.00.0100.00.0100.0100.00.0100.0100.00.00.00.0100.00.0100.0100.00.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:ProceedsFromSaleOfForeclosedAssets

us-gaap:ProceedsFromSaleOfForeclosedAssets


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value044000.013000.0104000.023000.031000.053000.048000.090000.0137000.0105000.091000.089000.0198000.088000.069000.093000.0179000.0127000.0199000.0257000.0311000.0266000.0389000.0531000.01088000.01041000.01890000.01538000.01730000.0780000.0851000.0526000.01778000.01037000.01346000.01068000.01002000.0887000.01166000.01250000.01517000.01236000.0973000.01541000.01199000.0
Percentage of ProceedsFromSaleOfForeclosedAssets0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale

us-gaap:ProceedsFromSaleOfMortgageLoansHeldForSale


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value11152622205.2045.1797.1175.5014.2444.486.0347.9785.68.0581117221424241718211515
Percentage of ProceedsFromSaleOfMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-302010-12-312010-09-302010-06-302010-03-31
Value1756000.094000.01732000.028000.014000.072000.02000.060000.032000.02000.038000.002000.01903000.04000.03000.02000.03000.08000.069000.01000.050000.016000.04000.03000.03000.00008000.0000024000.007000.0000038000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.0100.00.0100.00.00.00.00.0100.0

us-gaap:ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans

us-gaap:ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-302010-06-302010-03-31
Value-47000.0106000.0489000.091000.0140000.046000.0448000.0184000.020000.0470000.0946000.00680000.091000.0525000.00134000.00106000.01331000.0104000.0483000.06000.0086000.0548000.0260000.0081000.0194000.0019000.0195000.0266000.0166000.0289000.0112000.00755000.0370000.0700000.0226000.0303000.0419000.0
Percentage of ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2567000.03412000.0190000.0372000.001130000.0702000.0750000.0122000.0412000.0-2000.01571000.0283000.0801000.0165000.01505000.0383000.0639000.01245000.0224000.0159000.035000.0
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1040000.0991000.0986000.0961000.01082000.01195000.01142000.01192000.01069000.01314000.01189000.0824000.0952000.01070000.0859000.0996000.01050000.0939000.0982000.01148000.01478000.01338000.01517000.0825000.0793000.0742000.04464000.01132000.01304000.0927000.0850000.0730000.0562000.0640000.0487000.0606000.0390000.0551000.0577000.0571000.0457000.0555000.0652000.0418000.0539000.0406000.0
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanAndLeaseLosses


Provision
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-5.545-4.7465.245252.5081.0052.506-0.9182.4460.9751.2813.7351.2710.961.3461.0982.0651.6313.7682.3161.9512.2760.2683.8483.2874.8682.654.1332.7263.642.0210.4922.2453.2652.1743.0522.0441.4541.862.1384.4093.2012.263.867
Percentage of ProvisionForLoanAndLeaseLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLeaseAndOtherLosses

us-gaap:ProvisionForLoanLeaseAndOtherLosses


Provision
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1.677-10.149-4.7465.245253.7351.2710.961.3461.0982.0651.6313.7682.3161.9512.2760.2683.84826-4.868-2.65-4.133-2.726-3.64-2.021-0.492-2.245-3.2652.174-3.052-2.044-1.4541.86
Percentage of ProvisionForLoanLeaseAndOtherLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.52-7.379-5.911-4.4016.34242.5081.0052.506-0.918
Percentage of ProvisionForLoanLossesExpensed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

sbsi:MunicipalLoans


Provision
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0010.0-0.0010.0-0.0010.0230.0170.022-0.017
Percentage of ProvisionForLoanLossesExpensed0.1-0.00.00.0-0.00.91.70.91.9

us-gaap:CommercialLoan


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.074-0.962-0.4810.489-0.1291.9440.6710.6181.2660.734
Percentage of ProvisionForLoanLossesExpensed-4.913.08.1-11.1-2.08.126.861.550.5-80.0

us-gaap:CommercialRealEstatePortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.693-8.473-6.084-2.0017.653181.3070.0271.516-2.112
Percentage of ProvisionForLoanLossesExpensed111.4114.8102.945.5120.776.652.12.760.5230.1

us-gaap:ConstructionLoans


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.1831.710.848-2.868-1.1543.184-0.037-0.035-0.660.662
Percentage of ProvisionForLoanLossesExpensed-12.0-23.2-14.365.2-18.213.2-1.5-3.5-26.3-72.1

us-gaap:ConsumerLoan


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0550.090.0960.038-0.0780.2080.2050.360.2250.262
Percentage of ProvisionForLoanLossesExpensed3.6-1.2-1.6-0.9-1.20.98.235.89.0-28.5

us-gaap:ResidentialRealEstate


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0280.256-0.29-0.0580.0480.310.3390.0180.137-0.447
Percentage of ProvisionForLoanLossesExpensed1.8-3.54.91.30.81.313.51.85.548.7

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax us-gaap:RetirementPlanType, us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit


Reclassification
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0010.0020.0030.0010.0030.0010.0030.0010.0020.0010.0020.002
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit, us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Reclassification
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
Value0.009-0.641-0.822-0.821-0.664-0.728-0.597-0.596-0.651-0.542-0.547-0.547-0.62-0.475
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.00.0-82200.0-41050.0-22133.3-72800.0-19900.0-59600.0-21700.0-54200.0-27350.0-54700.0-31000.0-23750.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.009-0.641-0.821-0.819-0.661-0.727-0.594-0.595-0.648-0.541-0.545-0.546-0.618-0.473-0.4-0.402-0.414-0.389-0.455-0.448-0.51-0.407-0.608-0.687-0.61
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.00.0-82100.0-40950.0-22033.3-72700.0-19800.0-59500.0-21600.0-54100.0-27250.0-54600.0-30900.0-23650.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCredit


Reclassification
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0.0010.0020.0030.0010.0030.0010.0030.0010.0020.0010.0020.0020.0030.0010.0020.0020.0020.01-0.0080.0040.0040.0040.0040.0040.0040.0030.0040.0030.0110.010.011
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLoss


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0.009-0.641-0.822-0.821-0.664-0.728-0.597-0.596-0.651-0.542-0.547-0.547-0.62-0.475-0.403-0.403-0.416-0.391-0.457-0.458-0.502-0.411-0.612-0.691-0.614-0.531-0.261-0.26-0.289-0.232-0.696-0.697-0.751
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.00.0-82200.0-41050.0-22133.3-72800.0-19900.0-59600.0-21700.0-54200.0-27350.0-54700.0-31000.0-23750.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Reclassification
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
Value-1.599-1.568-1.662-1.587-0.7970.1010.2340.4990.6420.6680.5420.4060.3310.127-0.06-0.101-0.223
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.00.0-166200.0-79350.0-26566.710100.07800.049900.021400.066800.027100.040600.016550.06350.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-0.3751.587-0.491-0.3162.4475.42-0.091-0.070.336-0.235-0.454-0.08-1.584-1.072-0.3130.137-0.288-0.166-2.9452.3270.6412.3840.2040.8750.1052.4761.171.1510.4980.0110.054-0.075.0824.3454.3954.3023.297
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.00.0-49100.0-15800.081566.7542000.0-3033.3-7000.011200.0-23500.0-22700.0-8000.0-79200.0-53600.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-30
Value-1.965-0.622-2.974-2.7220.9894.794-0.451-0.1660.33-0.108-0.457-0.22-1.871-1.418-0.773-0.366-0.925-0.925-3.8771.3580.131-0.588-0.032-0.749
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax0.00.0-297400.0-136100.032966.7479400.0-15033.3-16600.011000.0-10800.0-22850.0-22000.0-93550.0-70900.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-1554000.0-491000.0-2349000.0-2150000.0781000.03787000.0-357000.0-132000.0262000.0-86000.0-359000.0-174000.0-1479000.0-1035000.0-503000.0-237000.0-601000.0-601000.0-2520000.0882000.085000.01053000.0-382000.0-21000.0-487000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value6000.0-506000.0-648000.0-647000.0-522000.0-575000.0-470000.0-470000.0-512000.0-427000.0-429000.0-431000.0-489000.0-374000.0-260000.0-261000.0-269000.0-253000.0-295000.0-292000.0-331000.0-265000.0-396000.0-446000.0-397000.0
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax-0.4103.127.630.1-66.8-15.2131.7356.1-195.4496.5119.5247.733.136.151.7110.144.842.111.7-33.1-389.4-25.2103.72123.881.5

us-gaap:ReclassificationFromAociCurrentPeriodTax us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value3000.0-135000.0-173000.0-172000.0-139000.0-152000.0-124000.0-125000.0-136000.0-114000.0-116000.0-115000.0-129000.0-99000.0-140000.0-141000.0-145000.0-136000.0-160000.0-156000.0-179000.0-142000.0-212000.0-241000.0-213000.0
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value30144176117825229198029452552125411991655147410666031355545770934828147324338443245895453263055543456020512145111780260985876909346335026014313352054626227811002937191731131273
Percentage of RepaymentsOfFederalHomeLoanBankBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap: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
Value01100000.012000.0-100000.07800000.0227000.014000.0537000.0654000.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability0.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value330000.0332000.0337000.0336000.0347000.0353000.0349000.0355000.0389000.0369000.0367000.0353000.0385000.0377000.0368000.0353000.0419000.0344000.0334000.0314000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value321000.0321000.0322000.0322000.0334000.0340000.0336000.0342000.0373000.0356000.0354000.0341000.0372000.0363000.0354000.0340000.0405000.0331000.0320000.0299000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan97.396.795.595.896.396.396.396.395.996.596.596.696.696.396.296.396.796.295.895.2

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9000.011000.015000.014000.013000.013000.013000.013000.016000.013000.013000.012000.013000.014000.014000.013000.014000.013000.014000.015000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan2.73.34.54.23.73.73.73.74.13.53.53.43.43.73.83.73.33.84.24.8

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2441000.03386000.0331000.0-96000.01088000.0736000.0-53000.0338000.0-125000.01565000.0204000.0761000.080000.01500000.0293000.0597000.01213000.0203000.0119000.024000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1591000.02309000.0124000.0-127000.0693000.0430000.0-269000.0109000.0-188000.01015000.046000.0417000.0-76000.0982000.0241000.0579000.01128000.0200000.0112000.033000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation65.268.237.5132.363.758.4507.532.2150.464.922.554.8-95.065.582.397.093.098.594.1137.5

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-47000.0-41000.0-47000.0-50000.0-40000.0-27000.03000.0-32000.0-41000.0-35000.0-27000.0-25000.0-30000.0-24000.0-25000.0-24000.0-1000.0-18000.0-16000.0-15000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-1.9-1.2-14.252.1-3.7-3.7-5.7-9.532.8-2.2-13.2-3.3-37.5-1.6-8.5-4.0-0.1-8.9-13.4-62.5

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value897000.01118000.0254000.081000.0435000.0333000.0213000.0261000.0104000.0585000.0185000.0369000.0186000.0541000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation36.733.076.7-84.440.045.2-401.977.2-83.237.490.748.5232.536.1

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-06-302021-03-312020-03-312019-03-312016-12-312016-09-302016-06-302016-03-312013-12-312013-09-302013-06-302013-03-312010-12-312010-09-302010-06-302010-03-31
Value3.49715251.3250.00.00.0100.00.00.01.899-0.116-4.6920.0-0.024
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.00.00.00.0100.00.00.00.0100.0100.0100.00.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-06-302021-03-312020-03-312019-03-312016-12-312016-09-302016-06-302016-03-312013-12-312013-09-302013-06-302013-03-312011-09-302010-12-312010-09-302010-06-302010-03-31
Value3.49715251.3250.00.00.0100.00.00.01.8990.0-0.116-4.6920.0-0.024
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.00.00.00.0100.00.00.00.0100.00.0100.0100.00.0100.0

us-gaap:UnrealizedGainLossOnInvestments

us-gaap:UnrealizedGainLossOnInvestments


Unrealized
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
Value17000.0-107000.0-249000.0-232000.01000.053000.0-70000.0-27000.087000.076000.059000.0-42000.0-42000.0-92000.0
Percentage of UnrealizedGainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:AdditionalFundingAvailable us-gaap:LineOfCreditFacility

sbsi:AdditionalFundingAvailable

sbsi:FederalReserveDiscountWindow


Additional
Period End2021-06-302021-03-312020-12-312020-09-30
Value487618722785
Percentage of AdditionalFundingAvailable100.0100.0100.0100.0

sbsi:BankOwnedLifeInsuranceAggregateDeathBenefitsProvidedInContractBeforeInflationAdjustment us-gaap:TitleOfIndividual

sbsi:BankOwnedLifeInsuranceAggregateDeathBenefitsProvidedInContractBeforeInflationAdjustment

srt:ExecutiveOfficer


Bank
Period End2020-12-31
Value4500000.0
Percentage of BankOwnedLifeInsuranceAggregateDeathBenefitsProvidedInContractBeforeInflationAdjustment100.0

sbsi:BankOwnedLifeInsuranceAggregateDeathBenefitsProvidedInContractInflationAdjusted us-gaap:TitleOfIndividual

sbsi:BankOwnedLifeInsuranceAggregateDeathBenefitsProvidedInContractInflationAdjusted

srt:ExecutiveOfficer


Bank
Period End2020-12-31
Value4500000.0
Percentage of BankOwnedLifeInsuranceAggregateDeathBenefitsProvidedInContractInflationAdjusted100.0

sbsi:BorrowedFundsMaturingAfterYearFive

sbsi:BorrowedFundsMaturingAfterYearFive


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.9441.1361.3321.5261.7181.9085.4675.6185.7675.915164164164162
Percentage of BorrowedFundsMaturingAfterYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:BorrowedFundsMaturingAfterYearFive us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.9441.1361.3321.5261.7181.9085.4675.6185.7675.9156.066.2056.3484.038
Percentage of BorrowedFundsMaturingAfterYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.0100.03.73.83.92.5

sbsi:BorrowedFundsMaturinginYearFive

sbsi:BorrowedFundsMaturinginYearFive


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value775000.0772000.0764000.0756000.0748000.0740000.000000000
Percentage of BorrowedFundsMaturinginYearFive100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0

sbsi:BorrowedFundsMaturinginYearFive us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value775000.0772000.0764000.0756000.0748000.0740000.000000000
Percentage of BorrowedFundsMaturinginYearFive100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0

sbsi:BorrowedFundsMaturinginYearFour

sbsi:BorrowedFundsMaturinginYearFour


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.7480.740.7320.7250.7170.710.00.00.00.00.00.06.011
Percentage of BorrowedFundsMaturinginYearFour100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0100.0

sbsi:BorrowedFundsMaturinginYearFour us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.7480.740.7320.7250.7170.710.00.00.00.00.00.06.011
Percentage of BorrowedFundsMaturinginYearFour100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0100.0

sbsi:BorrowedFundsMaturinginYearThree

sbsi:BorrowedFundsMaturinginYearThree


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.7170.710.7020.6950.6880.680.00.06.01111215576
Percentage of BorrowedFundsMaturinginYearThree100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0

sbsi:BorrowedFundsMaturinginYearThree us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.7170.710.7020.6950.6880.680.00.06.01111215576
Percentage of BorrowedFundsMaturinginYearThree100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0

sbsi:BorrowedFundsMaturinginYearTwo

sbsi:BorrowedFundsMaturinginYearTwo


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.6870.680.6730.6666.65911112114536538540027562
Percentage of BorrowedFundsMaturinginYearTwo100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:BorrowedFundsMaturinginYearTwo us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.6870.680.6730.6666.65911112114536538540027562
Percentage of BorrowedFundsMaturinginYearTwo100.0100.0100.0100.0100.0100.0100.099.499.9100.099.999.9100.0100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipal

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipal


Borrowed
Period End2021-06-30
Value745
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipal100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipal us-gaap:DebtInstrument

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase


Borrowed
Period End2021-06-30
Value23
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipal3.2

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-06-30
Value721
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipal96.8

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive


Borrowed
Period End2021-06-30
Value847000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-06-30
Value847000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFive

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFive


Borrowed
Period End2021-06-30
Value679000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFive100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFive us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-06-30
Value679000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFive100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFour

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFour


Borrowed
Period End2021-06-30
Value756000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFour100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFour us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-06-30
Value756000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearFour100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearThree

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearThree


Borrowed
Period End2021-06-30
Value725000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearThree100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearThree us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-06-30
Value725000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearThree100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearTwo

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearTwo


Borrowed
Period End2021-06-30
Value695000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearTwo100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearTwo us-gaap:DebtInstrument

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-06-30
Value695000.0
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInRollingYearTwo100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInTheNextRollingTwelveMonths

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInTheNextRollingTwelveMonths


Borrowed
Period End2021-06-30
Value741
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInTheNextRollingTwelveMonths100.0

sbsi:BorrowedFundsMaturitiesRepaymentsOfPrincipalInTheNextRollingTwelveMonths us-gaap:DebtInstrument

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase


Borrowed
Period End2021-06-30
Value23
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInTheNextRollingTwelveMonths3.2

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-06-30
Value717
Percentage of BorrowedFundsMaturitiesRepaymentsOfPrincipalInTheNextRollingTwelveMonths96.8

sbsi:BorrowedFundsMaturitiesRepaymentsofPrincipalintheNextTwelveMonths

sbsi:BorrowedFundsMaturitiesRepaymentsofPrincipalintheNextTwelveMonths


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value68385199011611481985971822471373167356436872
Percentage of BorrowedFundsMaturitiesRepaymentsofPrincipalintheNextTwelveMonths100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:BorrowedFundsMaturitiesRepaymentsofPrincipalintheNextTwelveMonths us-gaap:DebtInstrument

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value22234171217289.626258.505368.5888.0317.8259.498
Percentage of BorrowedFundsMaturitiesRepaymentsofPrincipalintheNextTwelveMonths3.32.74.26.114.72.91.03.21.89.85.12.31.81.1

us-gaap:FederalHomeLoanBankAdvances


Borrowed
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value66182894810891263957962796462336158348428863
Percentage of BorrowedFundsMaturitiesRepaymentsofPrincipalintheNextTwelveMonths96.797.395.893.985.397.199.096.898.290.294.997.798.298.9

sbsi:Certificatesandothertimedeposits250000ormore sbsi:DepositsByCustomerAlternative

sbsi:Certificatesandothertimedeposits250000ormore

sbsi:PrivateAccounts


Certificatesandothertimedeposits250000ormoresbsi:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value779184875857
Percentage of Certificatesandothertimedeposits250000ormore100.0100.0100.0100.0100.0100.0

sbsi:PublicAccounts


Certificatesandothertimedeposits250000ormoresbsi:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value227368281462409311
Percentage of Certificatesandothertimedeposits250000ormore292.0401.1332.5530.9702.6545.1

sbsi:CommercialRealEstateFarmLand us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

sbsi:CommercialRealEstateFarmLand

us-gaap:CommercialRealEstatePortfolioSegment


Commercial
Period End2021-06-302021-03-312020-12-312020-09-30
Value18151515
Percentage of CommercialRealEstateFarmLand100.0100.0100.0100.0

sbsi:CommercialRealEstateMultifamily us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

sbsi:CommercialRealEstateMultifamily

us-gaap:CommercialRealEstatePortfolioSegment


Commercial
Period End2021-06-302021-03-312020-12-312020-09-30
Value1708197119
Percentage of CommercialRealEstateMultifamily100.0100.0100.0100.0

sbsi:CommercialRealEstateOwnerandNonOwnerOccupiedRealEstate us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

sbsi:CommercialRealEstateOwnerandNonOwnerOccupiedRealEstate

us-gaap:CommercialRealEstatePortfolioSegment


Commercial
Period End2021-06-302021-03-312020-12-312020-09-30
Value1240125011801190
Percentage of CommercialRealEstateOwnerandNonOwnerOccupiedRealEstate100.0100.0100.0100.0

sbsi:DebtSecuritiesHeldtoMaturityNetofAllowanceforCreditLosses

sbsi:DebtSecuritiesHeldtoMaturityNetofAllowanceforCreditLosses


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value98108115120134
Percentage of DebtSecuritiesHeldtoMaturityNetofAllowanceforCreditLosses100.0100.0100.0100.0100.0

sbsi:DebtSecuritiesHeldtoMaturityNetofAllowanceforCreditLosses us-gaap:FinancialInstrument

us-gaap:CommercialMortgageBackedSecurities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value5160606071
Percentage of DebtSecuritiesHeldtoMaturityNetofAllowanceforCreditLosses53.055.252.450.353.5

us-gaap:ResidentialMortgageBackedSecurities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value4547535659
Percentage of DebtSecuritiesHeldtoMaturityNetofAllowanceforCreditLosses46.144.046.847.344.4

us-gaap:USStatesAndPoliticalSubdivisions


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.9080.9070.9072.8722.88
Percentage of DebtSecuritiesHeldtoMaturityNetofAllowanceforCreditLosses0.90.80.82.42.1

sbsi:DeferredTaxAssetFairValueAdjustmentonAcquiredLoans

sbsi:DeferredTaxAssetFairValueAdjustmentonAcquiredLoans


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1037000.01478000.01894000.02607000.01404000.05143000.06381000.00
Percentage of DeferredTaxAssetFairValueAdjustmentonAcquiredLoans100.0100.0100.0100.0100.0100.0100.00.0

sbsi:DeferredTaxAssetOperatingLeaseLiabilities

sbsi:DeferredTaxAssetOperatingLeaseLiabilities


Deferred
Period End2020-12-312019-12-31
Value3514000.02137000.0
Percentage of DeferredTaxAssetOperatingLeaseLiabilities100.0100.0

sbsi:DeferredTaxAssetsUnfundedStatusOfDefinedBenefitPlan

sbsi:DeferredTaxAssetsUnfundedStatusOfDefinedBenefitPlan


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value7.958.546.9797.018109.931116.6671411
Percentage of DeferredTaxAssetsUnfundedStatusOfDefinedBenefitPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

sbsi:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets


Deferred
Period End2020-12-312019-12-31
Value3163000.02049000.0
Percentage of DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets100.0100.0

sbsi:DeferredTaxLiabilitiesPensionPlan

sbsi:DeferredTaxLiabilitiesPensionPlan


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1582000.02179000.02519000.02102000.02707000.02220000.03250000.04260000.0
Percentage of DeferredTaxLiabilitiesPensionPlan100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:DefinedBenefitPlanExpectedFutureBenefitPayments us-gaap:RetirementPlanType

sbsi:DefinedBenefitPlanExpectedFutureBenefitPayments

us-gaap:OtherPensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.2551.671.5031.099
Percentage of DefinedBenefitPlanExpectedFutureBenefitPayments100.0100.0100.0100.0

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value10119.9769.034
Percentage of DefinedBenefitPlanExpectedFutureBenefitPayments867.2680.1663.7822.0

us-gaap:PensionPlansDefinedBenefit


Defined
Period End2020-12-312019-12-312018-12-312017-12-31
Value45464544
Percentage of DefinedBenefitPlanExpectedFutureBenefitPayments3648.32787.53048.04081.3

sbsi:DerivativeWeightedAveragePayRate us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

sbsi:DerivativeWeightedAveragePayRate

sbsi:FinancialInstitutionCounterparties, us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
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
Value1.141.111.121.140.01150.01150.01580.01580.01580.01580.01580.01580.01580.01430.01430.01430.01430.01430.01310.01310.0153
Percentage of DerivativeWeightedAveragePayRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:DerivativeWeightedAveragePayRate us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

sbsi:CustomerCounterparties, us-gaap:InterestRateSwap, us-gaap:Nondesignated


Derivative
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
Value0.450.520.50.30.00210.01320.01710.02080.02420.02490.02360.02120.02010.0170.01390.01230.01040.00830.00620.00520
Percentage of DerivativeWeightedAveragePayRate39.546.844.626.318.3114.8108.2131.6153.2157.6149.4134.2127.2118.997.286.072.758.047.339.70.0

sbsi:FinancialInstitutionCounterparties, us-gaap:InterestRateSwap, us-gaap:Nondesignated


Derivative
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
Value2.432.432.572.450.02450.02450.02470.0250.02570.02650.02580.02580.0250.02370.02370.02370.02370.02320.01570.01570
Percentage of DerivativeWeightedAveragePayRate213.2218.9229.5214.9213.0213.0156.3158.2162.7167.7163.3163.3158.2165.7165.7165.7165.7162.2119.8119.80.0

sbsi:DerivativeWeightedAverageReceiveRate us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

sbsi:DerivativeWeightedAverageReceiveRate

sbsi:FinancialInstitutionCounterparties, us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
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
Value0.10.140.170.180.00260.010.01770.02080.02440.02540.02450.02180.02120.01750.01440.01240.01140.00910.00680.00520.0029
Percentage of DerivativeWeightedAverageReceiveRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:DerivativeWeightedAverageReceiveRate us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

sbsi:CustomerCounterparties, us-gaap:InterestRateSwap, us-gaap:Nondesignated


Derivative
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
Value2.432.432.572.450.02450.02450.02470.0250.02570.02580.02580.02580.0250.02370.02370.02370.02370.02320.01570.01570
Percentage of DerivativeWeightedAverageReceiveRate2430.01735.71511.81361.1942.3245.0139.5120.2105.3101.6105.3118.3117.9135.4164.6191.1207.9254.9230.9301.90.0

sbsi:FinancialInstitutionCounterparties, us-gaap:InterestRateSwap, us-gaap:Nondesignated


Derivative
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
Value0.450.520.50.30.00210.01320.01710.02080.02420.02530.02360.02120.02010.0170.01390.01230.01040.00830.00620.00520
Percentage of DerivativeWeightedAverageReceiveRate450.0371.4294.1166.780.8132.096.6100.099.299.696.397.294.897.196.599.291.291.291.2100.00.0

sbsi:FinancingReceivableCollateralDependent

sbsi:FinancingReceivableCollateralDependent


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value10111111
Percentage of FinancingReceivableCollateralDependent100.0100.0100.0100.0

sbsi:FinancingReceivableNonperformingAndRepossessedAssets us-gaap:FinancialInstrumentPerformanceStatus

sbsi:FinancingReceivableNonperformingAndRepossessedAssets

us-gaap:NonperformingFinancingReceivable


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value151517161717
Percentage of FinancingReceivableNonperformingAndRepossessedAssets100.0100.0100.0100.0100.0100.0

sbsi:InterestBearingDomesticDepositCheckingPremierBusinessChecking sbsi:DepositsByCustomerAlternative

sbsi:InterestBearingDomesticDepositCheckingPremierBusinessChecking

sbsi:PrivateAccounts


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value83569966268621217711106.8744.425
Percentage of InterestBearingDomesticDepositCheckingPremierBusinessChecking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:PublicAccounts


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value81575655126.6790.0350.0310.0370.047
Percentage of InterestBearingDomesticDepositCheckingPremierBusinessChecking9.88.28.68.16.13.80.30.30.51.1

sbsi:InterestBearingDomesticDepositMoneyMarketPlatinum sbsi:DepositsByCustomerAlternative

sbsi:InterestBearingDomesticDepositMoneyMarketPlatinum

sbsi:PrivateAccounts


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value381353344308353323291290268270
Percentage of InterestBearingDomesticDepositMoneyMarketPlatinum100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:PublicAccounts


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value321266329360382383398336335180
Percentage of InterestBearingDomesticDepositMoneyMarketPlatinum84.275.595.7116.8108.1118.6136.7115.8124.666.7

sbsi:InvestmentInSubsidiariesAtEquityInUnderlyingNetAssets us-gaap:ConsolidatedEntities, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

sbsi:InvestmentInSubsidiariesAtEquityInUnderlyingNetAssets

srt:ParentCompany, sbsi:BankSubsidiaries


Investment
Period End2020-12-312019-12-312018-12-312017-12-31
Value1028949875894
Percentage of InvestmentInSubsidiariesAtEquityInUnderlyingNetAssets100.0100.0100.0100.0

sbsi:InvestmentSecuritiesHeldtomaturitySecuritiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

sbsi:InvestmentSecuritiesHeldtomaturitySecuritiesFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Investment
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
Value0.9130.9170.920.9242.8972.9032.9182.9283.0543.0543.0463.033.1623.171421429
Percentage of InvestmentSecuritiesHeldtomaturitySecuritiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:InvestmentSecuritiesHeldtomaturitySecuritiesFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-12-312013-09-302013-06-302012-12-31
Value0.9080.9080.9070.9072.8722.882.8882.8953.0183.0253.0833.0873.2023.2074134154194214253793803833853863873883883903913913021.009
Percentage of InvestmentSecuritiesHeldtomaturitySecuritiesFairValueDisclosure99.599.098.698.299.199.299.098.998.899.1101.2101.9101.3101.198.00.00.00.099.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-12-312013-09-302013-06-302012-12-31
Value0.9130.9170.920.9242.8972.9032.9182.9283.0543.0543.0463.033.1623.1714214264304274293964013993973953913994003873773792901.137
Percentage of InvestmentSecuritiesHeldtomaturitySecuritiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0

sbsi:LesseeOperatingLeaseLeaseNotYetCommencedPaymentsDue

sbsi:LesseeOperatingLeaseLeaseNotYetCommencedPaymentsDue


Lessee
Period End2020-12-31
Value1400000.0
Percentage of LesseeOperatingLeaseLeaseNotYetCommencedPaymentsDue100.0

sbsi:LoansAndLeasesReceivableRelatedPartiesAsPercentOfShareholdersEquity

sbsi:LoansAndLeasesReceivableRelatedPartiesAsPercentOfShareholdersEquity


Loans
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value3.70.0060.0060.0070.0120.0180.0170.0210.0170.016
Percentage of LoansAndLeasesReceivableRelatedPartiesAsPercentOfShareholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:LoansinProcessofForeclosure

sbsi:LoansinProcessofForeclosure


Loansin
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value234000.01200000.01100000.01100000.01200000.0992000.0781000.012000.0155000.0147000.0232000.0344000.0145000.0154000.027000.0102000.0028000.0239000.002900000.067000.0
Percentage of LoansinProcessofForeclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0

sbsi:NumberofSquareFeetOccupied

sbsi:NumberofSquareFeetOccupied


Numberof
Period End2020-12-31
Value39000.0
Percentage of NumberofSquareFeetOccupied100.0

sbsi:PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossTax us-gaap:RetirementPlanType

sbsi:PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossTax

us-gaap:OtherPensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.1040.1250.0350.015-0.014
Percentage of PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value1.1711.4190.8411.2761.017
Percentage of PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossTax1126.01135.22402.98506.7-7264.3

us-gaap:PensionPlansDefinedBenefit


Pension
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value6.6746.9946.19.6749.433
Percentage of PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossTax6417.35595.217428.664493.3-67378.6

sbsi:RestructuredNonaccrualLoans

sbsi:RestructuredNonaccrualLoans


Restructured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value0.810.8890.9760.7830.380.3740.4698.98.910101.3
Percentage of RestructuredNonaccrualLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:SecuritiesTransferredUnrealizedLossNetOfTax

sbsi:SecuritiesTransferredUnrealizedLossNetOfTax


Securities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1600000.01900000.02300000.02600000.02900000.03100000.02900000.0
Percentage of SecuritiesTransferredUnrealizedLossNetOfTax100.0100.0100.0100.0100.0100.0100.0

sbsi:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue us-gaap:AwardType

sbsi:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue

us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value6.446.386.476.196.236.126.126.136.136.296.36.186.186.495.455.455.45
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:SplitDollarAgreements us-gaap:TitleOfIndividual

sbsi:SplitDollarAgreements

srt:ExecutiveOfficer


Split
Period End2020-12-312019-12-312018-12-31
Value1500000.01300000.01400000.0
Percentage of SplitDollarAgreements100.0100.0100.0

sbsi:TimeDepositsLessthan250000Domestic sbsi:DepositsByCustomerAlternative

sbsi:TimeDepositsLessthan250000Domestic

sbsi:PrivateAccounts


Time
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value474790680534422498
Percentage of TimeDepositsLessthan250000Domestic100.0100.0100.0100.0100.0100.0

sbsi:PublicAccounts


Time
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value11439.521282221
Percentage of TimeDepositsLessthan250000Domestic2.45.51.45.45.24.3

sbsi:TransferredSecuritiesUnrealizedLossBeforeTax

sbsi:TransferredSecuritiesUnrealizedLossBeforeTax


Transferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.12.42.93.33.73.93.73.84.04.01515151617
Percentage of TransferredSecuritiesUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:UnsettledTradesToPurchaseSecuritiesLiability

sbsi:UnsettledTradesToPurchaseSecuritiesLiability


Unsettled
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value41237.2942614173038556.378282.2793.6460.01624100.1630112319213.453135.98215101.0320.973252771101742961.1960.145
Percentage of UnsettledTradesToPurchaseSecuritiesLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

sbsi:UnsettledTradesToRepurchaseCommonStock

sbsi:UnsettledTradesToRepurchaseCommonStock


Unsettled
Period End2021-03-312020-03-31
Value-1086000.0-1883000.0
Percentage of UnsettledTradesToRepurchaseCommonStock100.0100.0

sbsi:WeightedAverageCostDomesticDepositBrokered sbsi:ClassOfDepositLiabilities

sbsi:WeightedAverageCostDomesticDepositBrokered

us-gaap:CertificatesOfDeposit


Weighted
Period End2020-12-31
Value18.0
Percentage of WeightedAverageCostDomesticDepositBrokered100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax us-gaap:RetirementPlanType

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:OtherPensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.3940.4730.1360.081-0.026
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4.4045.3433.1673.4361.889
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax1117.81129.62328.74242.0-7265.4

us-gaap:PensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2526222217
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax6372.85563.216875.728253.1-67376.9

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value49486.0946.1116.1116.0615.9655.9935.9485.8645.791255.785.92
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value27402518260526542701283423682252209718842001193820541541
Percentage of AssetsFairValueDisclosure5509.35196.542760.843445.344214.346765.139701.537591.235268.232145.034554.17605.735539.626038.2

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.571010101011193233323934368.303
Percentage of AssetsFairValueDisclosure19.221.9176.8168.3172.8182.8319.5540.0558.5557.3673.8136.1629.8140.3

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9.571010101011193233323934368.303
Percentage of AssetsFairValueDisclosure19.221.9176.8168.3172.8182.8319.5540.0558.5557.3673.8136.1629.8140.3

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value27902566261126612708284023742258210318902006196320591547
Percentage of AssetsFairValueDisclosure5609.35296.542860.843545.344314.346865.139801.537691.235368.232245.034654.17705.735639.626138.2

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-09-302014-06-302013-12-31
Value13410815013313111054614418106.97610212219
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

sbsi:OtherStocksAndBonds


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.561.0530.6440.00.00.1370.00.00.00.00.0270.032
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax1.40.70.50.00.00.30.00.00.00.00.40.3

us-gaap:CommercialMortgageBackedSecurities


Available
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
Value3.5853.8024.7465.4656.0285.8774.7956.8124.9630.910.9410.2440.522
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax2.73.53.24.14.65.38.811.011.14.98.93.55.2

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302020-12-31
Value2.1911.053
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax1.60.7

us-gaap:ResidentialMortgageBackedSecurities


Available
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
Value2631384548522529228.6693.4981.9972.394
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax19.729.025.833.836.947.547.247.551.446.333.128.623.9

us-gaap:USStatesAndPoliticalSubdivisions


Available
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
Value101711058276522325169.136.1154.6667.064
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax75.366.070.461.658.547.243.841.537.548.857.966.970.6

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312018-09-30
Value0.9830.0080.042
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.70.00.6

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-09-302014-06-302013-12-31
Value2.2599.9520.2820.4730.242.1022.571.411.3857.2793461482.7355.45420
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

sbsi:OtherStocksAndBonds


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.2160.0220.0540.0090.5890.00.0440.0410.0790.2910.00.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax2.27.811.43.828.00.03.13.01.10.80.00.0

us-gaap:CommercialMortgageBackedSecurities


Available
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
Value0.250.4020.150.0980.180.00.0340.0030.021.1677.5451512
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax11.14.053.220.775.00.01.30.21.416.021.824.926.1

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302020-12-31
Value0.3310.022
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax14.77.8

us-gaap:ResidentialMortgageBackedSecurities


Available
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
Value0.2520.3010.0730.0270.0160.01.130.4410.8464.1689.1112217
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax11.23.025.95.76.70.044.031.361.157.326.336.536.7

us-gaap:USStatesAndPoliticalSubdivisions


Available
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
Value1.4268.6840.0370.2940.0351.5131.4060.9220.4781.865172317
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax63.187.313.162.214.672.054.765.434.525.651.038.637.2

us-gaap:USTreasurySecurities


Available
Period End2021-03-312018-09-30
Value0.3490.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax3.50.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
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
Value2634244824372500254827042306217920451864201319942076
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

sbsi:OtherStocksAndBonds


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value9177477.010.010.03.03.03.03.03.03.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis3.73.21.90.30.40.40.10.10.20.10.20.1

us-gaap:CommercialMortgageBackedSecurities


Available
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
Value106109113122124121230231233416543544551
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis4.14.54.74.94.94.510.010.611.422.327.027.326.6

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302020-12-31
Value11277
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis4.33.2

us-gaap:ResidentialMortgageBackedSecurities


Available
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
Value60667577189910241158128613091296999738708714
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis23.027.631.636.040.242.855.860.163.453.636.735.534.4

us-gaap:USStatesAndPoliticalSubdivisions


Available
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
Value176515281475143013921415780635512446728718806
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis67.062.460.557.254.652.333.829.125.123.936.236.038.9

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312018-09-30
Value424219
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.61.71.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost


Available
Period End2021-03-312020-12-312020-09-30
Value939057
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue


Available
Period End2021-03-312020-12-312020-09-30
Value969359
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost


Available
Period End2021-03-312020-12-312020-09-30
Value323236
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue


Available
Period End2021-03-312020-12-312020-09-30
Value333337
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost


Available
Period End2021-03-312020-12-312020-09-30
Value153514261382
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue


Available
Period End2021-03-312020-12-312020-09-30
Value159515291462
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis