WABC


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

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

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

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets
dei:LegalEntity

us-gaap:CapitalToRiskWeightedAssets
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents
us-gaap:ProductOrService
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

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:StatementEquityComponents

us-gaap:TierOneRiskBasedCapital
dei:LegalEntity
us-gaap:ConsolidatedEntities
us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AmortizationOfIntangibleAssets
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:ConsolidatedEntities, us-gaap:InvestmentsInAndAdvancesToAffiliatesCategorization
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability
us-gaap:BalanceSheetLocation

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

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

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName
us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:ProceedsFromRepaymentsOfShortTermDebt

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedGainLoss

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal

us-gaap:DepreciationAmortizationAndAccretionNet

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown

us-gaap:IncomeLossFromAffordableHousingProjectsEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInIncomeTaxes

us-gaap:IncreaseDecreaseInIncomeTaxesReceivable

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeSecurities

us-gaap:InterestAndDividendIncomeSecuritiesHeldToMaturity

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseOther

us-gaap:InterestExpenseShortTermBorrowings

us-gaap:InterestExpenseTimeDeposits100000OrMore

us-gaap:InterestIncomeDebtSecuritiesAvailableForSaleOperating

us-gaap:InterestIncomeDepositsWithFinancialInstitutions

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:LaborAndRelatedExpense
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LossContingencyAccrualPayments

us-gaap:NoninterestExpense

us-gaap:NoninterestIncome

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:OccupancyNet

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherNoninterestExpense

us-gaap:OtherSignificantNoncashTransactionValueOfConsiderationGiven1

us-gaap:PaymentsForProceedsFromLoansAndLeases

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromRepaymentsOfDebt

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesIssuedForServices
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:StockOptionPlanExpense
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

wabc:ContractCourierExpense

wabc:DebtSecuritiesHeldtomaturityAllowanceForCreditLossIncreaseDecreaseFromAdoptionOfAccountingPolicies
us-gaap:FairValueByFairValueHierarchyLevel
wabc:FairValueInputsAppraisalRate

wabc:InterestAndDividendIncomeEquitySecuritiesOperating

wabc:TroubledDebtRestructuringsDuringPeriod
us-gaap:ConsolidatedEntities
us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:AccountsReceivableRelatedParties
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

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

us-gaap:BankOwnedLifeInsurance

us-gaap:Capital
dei:LegalEntity

us-gaap:CapitalRequiredForCapitalAdequacy
dei:LegalEntity

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
dei:LegalEntity
dei:LegalEntity
us-gaap:CapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

us-gaap:CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned
us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:CashAndDueFromBanks

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CommonEquityTierOneCapital
dei:LegalEntity

us-gaap:CommonEquityTierOneCapitalRatio
dei:LegalEntity

us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy
dei:LegalEntity
dei:LegalEntity
us-gaap:CommonEquityTierOneCapitalRequiredToBeWellCapitalized

us-gaap:CostMethodInvestments

us-gaap:DebtSecuritiesAvailableForSaleAndHeldToMaturity

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:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss
us-gaap:CumulativeEffectPeriodOfAdoption

us-gaap:DeferredIncomeTaxLiabilities
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName
us-gaap:DeferredTaxAssetsCapitalLossCarryforwards

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses

us-gaap:DeferredTaxLiabilitiesDeferredExpense

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:CounterpartyName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear

us-gaap:DemandDepositAccounts

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

us-gaap:DepositsSavingsDeposits

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:FederalReserveBankStock

us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableModificationsRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivableRecordedInvestmentPastDue
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableRevolving
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:GuaranteeObligationsCurrentCarryingValue

us-gaap:HeldToMaturitySecurities
us-gaap:ExternalCreditRatingByGrouping
us-gaap:ExternalCreditRatingByGrouping, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

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:InterestBearingDepositLiabilitiesDomestic

us-gaap:InterestReceivableCurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LoansAndLeasesReceivableRelatedParties
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:LongTermDebtFairValue
us-gaap:FairValueByMeasurementBasis
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LossContingencyAccrualAtCarryingValue

us-gaap:MortgageLoansInProcessOfForeclosureAmount

us-gaap:NoninterestBearingDepositLiabilitiesDomestic

us-gaap:NotesReceivableGross
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:InternalCreditAssessment
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

us-gaap:NotesReceivableNet
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherAssetsMiscellaneous

us-gaap:OtherInvestmentsAndSecuritiesAtCost

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities

us-gaap:OtherLongTermDebt

us-gaap:OtherRealEstate

us-gaap:OtherRealEstateAndForeclosedAssets

us-gaap:OtherSundryLiabilities

us-gaap:PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged

us-gaap:PrepaidExpenseCurrentAndNoncurrent

us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment
us-gaap:OtherCommitments

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares

us-gaap:ShortTermBorrowings

us-gaap:StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased

us-gaap:TierOneLeverageCapital
dei:LegalEntity

us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacy
dei:LegalEntity

us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
dei:LegalEntity
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets

us-gaap:TierOneLeverageCapitalToAverageAssets
dei:LegalEntity

us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacy
dei:LegalEntity

us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
dei:LegalEntity
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalized
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

us-gaap:TimeDepositsLessThan100000
us-gaap:FinancingReceivablePortfolioSegment
wabc:AllowanceForCreditLossesCollateralDependentLoans

wabc:CapitalConservationBuffer
us-gaap:FinancingReceivablePortfolioSegment
wabc:CollateralDependentLoansBalance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

wabc:CommonEquityTier1CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
dei:LegalEntity
dei:LegalEntity
wabc:CommonEquityTier1CapitalToBeWellCapitalizedToRiskWeightedAssets
us-gaap:Range, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
wabc:ConcentrationRiskAggregateLoansAmount

wabc:DebtSecuritiesAvailableforsaleAndHeldtomaturityAmortizedCost

wabc:DebtSecuritiesGrossUnrecognizedGains

wabc:DebtSecuritiesGrossUnrecognizedLosses
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
wabc:DebtSecuritiesHeldtomaturityFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

wabc:DebtSecuritiesHeldtomaturityFairValueNet

wabc:DeferredCompensation

wabc:DeferredTaxAssetsLimitedPartnershipInvestments

wabc:DeferredTaxAssetsPurchasedAssetsAndAssumedLiabilities

wabc:DeferredTaxAssetsVISAClassBShares

wabc:DeferredTaxLiabilitiesUnrealizedGainOnAvailableforsaleSecuritiesGross

wabc:DeferredTaxLiabilitiesUnrealizedGainsOnAvailableForSaleDebtSecurities

wabc:DemandDepositOverdrafts
us-gaap:FinancingReceivablePortfolioSegment
wabc:FinancingReceivableBeforeAllowanceForCreditLossAndRevolvingLoans
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
wabc:FinancingReceivableLoanDeferrals
us-gaap:FinancingReceivablePortfolioSegment
wabc:FinancingReceivableOriginatedMoreThanSixYearsBeforeCurrentFiscalYear
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
wabc:FinancingReceivablePrincipalAndInterestDeferredPayments
us-gaap:FinancingReceivablePortfolioSegment
wabc:FinancingReceivableYearSixOriginatedFiveYearsBeforeCurrentFiscalYear
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

wabc:HeldToMaturitySecuritiesNet
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
wabc:ImpairedLoansRestructuredNonaccrualStatus

wabc:LIHTCInvestments

wabc:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

wabc:LoanCommitmentsAndStandbyLettersOfCreditRelatedToRealEstateLoans

wabc:LoanCommitmentsNotUnconditionallyCancellable

wabc:LoanCommitmentsRelatedToRealEstateLoans
us-gaap:MortgageLoansOnRealEstateDescriptionLoanCategory
wabc:LoanToValueRatioRequirement

wabc:LoansAndLeasesReceivablePercentOutstandingRelatedParties

wabc:OtherLiabilitiesExcludingOperatingLeaseLiability

wabc:OtherRealEstateReserve
us-gaap:BalanceSheetLocation
wabc:ReserveForUnfundedCommitments

wabc:SecuritiesPurchasesPendingSettlement
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
wabc:ShortTermBorrowedFundsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

wabc:TimeDeposits100ThousandThrough250Thousand

wabc:TimeDepositsMoreThan250Thousand

wabc:UnfundedLoanCommitments

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Interest Expense
Balance Sheet
Finite Lived Intangible Assets Net
Assets
Operating Lease Right Of Use Asset
NonCurrent Assets
Finite Lived Intangible Assets Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Payments For Repurchase Of Common Stock
Shares
Common Stock Shares Issued
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
BanksAndOrInsurance
Interest And Dividend Income Operating
AssetsBanks
Financing Receivable Allowance For Credit Losses
LiabilitiesBanks
Short Term Borrowings

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ███████▇▇▇▆▆▆▆▅▅▅▅▃▂▂▁▁▁▁▁▁▁▂▂▁470.33469.85466.006467.201467.351465.701465.46462.653459.369455.304448.351447.785443.338439.817431.734425.655424.479422.67404.606391.601389.68379.893378.858378.649377.339374.958378.132380.195382.182383.49378.946NANANA372.012NANANANANANANANANANANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▆▆▆▆▇▇██▇▇▅▅▄▄▂▁▁26.86526.86426.80726.89826.93326.93227.06227.01426.96226.90126.7326.72726.64926.59126.42526.31926.304NA25.907NANANA25.528NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockSharesIssued ▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▁▁▁▁▁▁▁▂▂▂▃▃▃▄▄▄▅▅▆▆▆▇██26.86526.86426.80726.89826.93326.93227.06227.01426.96226.90126.7326.72726.64926.59126.42526.31926.30426.28325.90725.66525.63225.43825.52825.5325.52925.56325.74525.90626.07426.29926.5126.57826.76927.01827.21327.39627.62127.91728.1528.30128.5428.9229.09NANANA
us-gaap:CommonStockSharesOutstanding ▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▁▁▁▁▁▁▁▂▂▂▃▃▃▄▄▄▅▅▆▆▆▇██26.86526.86426.80726.89826.93326.93227.06227.01426.96226.90126.7326.72726.64926.59126.42526.31926.30426.28325.90725.66525.63225.43825.52825.5325.52925.56325.74525.90626.07426.29926.5126.57826.76927.01827.21327.39627.62127.91728.1528.30128.5428.9229.09NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁26.88726.842NA26.94626.95127.139NA27.02726.98726.912NA26.81526.72826.665NA26.40426.40226.329NA25.68725.6325.458NA25.56525.53625.655NA26.01626.23826.537NA26.70526.89827.157NA27.56527.7928.111NA28.49828.92329.225NA29.38529.56829.596
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁26.86526.821NA26.9326.93527.068NA26.98626.94226.841NA26.70126.6326.532NA26.30926.29926.171NA25.64125.58625.445NA25.5325.51425.651NA25.97326.17526.433NA26.6726.8927.145NA27.51327.74428.051NA28.43328.77129.021NA29.12729.20729.228
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOption▁█0.510.598NA0.5670.5990.514NA0.3790.4360.463NA0.3260.4820.491NA0.3760.3520.299NA0.7710.7791.297NA1.0431.3761.775NA1.3221.05NANANANANANANANANANANANANANANANANA
us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets NANA1.604e-05NANANA1.622e-07NANANA1.6300000000000002e-07NANANA1.536e-07NANANA1.4849999999999999e-07NANANA1.282e-07NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets dei:LegalEntity wabc:WestamericaBankNANA1.3e-05NANANA1.18e-07NANANA1.3009999999999998e-07NANANA1.25e-07NANANA1.17e-07NANANA1.1e-07NANANA1.204e-07NANANA1.3259999999999998e-07NANANA1.414e-07NANANA1.384e-07NANANA1.387e-07NANANA
us-gaap:CapitalToRiskWeightedAssets NANA1.668e-05NANANA1.6830000000000002e-07NANANA1.703e-07NANANA1.617e-07NANANA1.595e-07NANANA1.339e-07NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity wabc:WestamericaBankNANA1.38e-05NANANA1.258e-07NANANA1.394e-07NANANA1.352e-07NANANA1.3020000000000001e-07NANANA1.168e-07NANANA1.349e-07NANANA1.493e-07NANANA1.562e-07NANANA1.532e-07NANANA1.533e-07NANANA
  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 ▄▁▄▄█▂▄▄▅▅▄▃▃▂▂▃▃▃▂▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▄▄▃▄▄▄40.599-25.36434.62729.942113.123-8.91826.32527.7243.99848.39333.12512.82711.562-5.631-9.23917.44819.37815.68-4.62212.74419.81220.178.05518.0679.1518.86510.58712.33318.85519.8516.24916.3346.26418.01819.30721.44621.81421.81622.37924.97626.99424.74916.65224.63325.07924.658
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▇▅▇▅▄▃▅▅▄▄▄▂▃▂▃▂▃▂▁▂▁▁▁▁▁▁▁▂▁▁▂▂▃▃▄▅▅▆▆▇▆▇████30.53327.12431.89426.77225.90422.23326.9527.01625.86625.38525.04421.24922.91521.78923.86621.10622.31419.88619.67721.65519.65918.96619.12619.53419.18118.83119.53419.89219.74419.78320.12521.64122.34222.01424.72326.44726.81328.57429.95930.92729.11830.81132.63732.8732.80833.108
us-gaap:IncomeTaxExpenseBenefit ▃▂▃▂▂▂▂▂▂▂▂▁▁▁█▂▂▁▂▂▁▁▁▁▁▁▁▁▁▁▁▁▂▁▂▂▂▃▃▃▃▃▃▃▃▃7.9546.9778.0566.7216.3425.2716.2226.6266.2415.7395.9894.2564.9054.28319.7066.0896.5154.8375.2246.0275.1134.744.5484.6774.424.2744.5064.7384.5874.4764.0694.9035.234.7435.5876.4255.8497.5698.1548.4957.8498.4298.9069.1619.2479.532
us-gaap:IncomeTaxesPaidNet NANA7.7546.80811.90.08.473.11112.910.06.5990.252NANA2.6943.65910.4980.55.2324.118.7221.25.073.096NANA1.4313.227NANA4.6315.152NANA6.6455.835NANA6.2225.966NANANANANANA
us-gaap:InterestExpense ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▃▃▃▃▃▃▄▄▅▅▅▇▇▇█0.4840.4750.4810.4660.4350.4420.4510.4550.4870.4940.5140.5270.4590.4590.4710.4730.4760.480.50.5230.5410.5520.5630.5850.6170.6590.80.8460.90.8981.0241.1761.2191.2521.3311.3821.4721.5591.8552.0712.1532.3033.0653.0963.1453.534
us-gaap:InterestIncomeExpenseNet ▅▄▄▄▄▃▃▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▃▃▄▅▆▆▇▇▇▇████43.79241.84142.4840.89941.10439.54939.42739.2439.13938.98938.93435.72635.12334.04833.73332.67232.68732.84432.70932.94533.18633.09533.32533.71433.80833.25833.54234.05434.50334.66635.68236.7838.0539.21341.56343.8945.42946.73948.56549.90550.93550.19151.80652.10751.93352.469
us-gaap:InterestPaidNet ▄▄▇▅▁▃▅▇▁▅▅█▃▃▅▅▄▆0.4570.4590.520.4850.3930.4320.4810.5430.3880.4860.4920.5550.4410.4440.4940.4820.4510.504NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss █▇█▇▆▆▇▇▇▇▆▆▆▆▁▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇▇▇▇▇▇████22.57920.14723.83820.05119.56216.96220.72820.3919.62519.64619.05516.99318.0117.5064.1615.01715.79915.04914.45315.62814.54614.22614.57814.85714.76114.55715.02815.15415.15715.30716.05616.73817.11217.27119.13620.02220.96421.00521.80522.43221.26922.38223.73123.70923.56123.576
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▄▁▄▄█▂▄▄▅▅▄▃▃▂▃▃▃▃▂▃▄▄▃▃▃▄▃▃▃▄▃▃▃▃▃▃▃▃▃▃▄18.02-45.51110.7899.89193.561-25.885.5977.3324.37328.74714.07-4.166-6.448-23.137-13.3992.4313.5790.631-19.075-2.8845.2665.944-6.5233.21-5.6114.308-4.441-2.8213.6984.5430.193-0.404-10.8480.7470.1711.4240.850.8110.5742.5445.725NANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:CreditCardMerchantDiscount█▄▅▆▃▃▄▄▅▄▄▄▃▄▃▂▂▁3.2792.562.7132.862.2772.3582.4242.4942.6572.5582.442.4642.3052.422.3462.1532.0521.875NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:DebitCard█▄▅▄▁▁▃▅▅▂▆▅▆▄▃█▄▁1.7911.6011.6431.6111.4591.4681.5681.6411.6411.5071.6841.6561.6981.6051.571.7841.5861.481NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:DepositAccount▁▂▂▂▁▅▆▆▆▆▆▇▇▇▇███3.2353.3043.4523.2983.1514.2484.3744.514.4934.5044.4964.6154.6454.7524.7554.9894.9454.923NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:FiduciaryAndTrust█▇▅▄▂▅▄▃▄▂▃▃▂▃▃▂▂▁0.8270.8010.7650.7560.7140.7770.7640.7330.7490.7170.7360.7330.7260.7430.7390.7180.7160.702NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:FinancialServiceOther▃▂▂▂▁▃▄▆▆▅▇██▇▇███0.4910.4690.4570.4540.420.5060.5130.580.5850.5770.6210.6650.650.6310.620.6520.6620.65NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService wabc:ATMProcessingFees▄▄▃▄▁▃▇██▅▇▇▇▆▇▇▆▃0.6180.6010.570.6060.5180.5790.6960.7250.7220.6330.7030.6870.6980.6640.6960.6840.6540.575NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService wabc:FinancialServicesCommission▃▂▁▁▄▄▄▂▃▃▄▅▅▄▆▆▅█0.0950.070.0660.0580.1230.1250.1220.0750.0930.1010.1120.1320.1410.1140.1550.1480.1420.195NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 █▇▇▆▆▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▁▁▁▁7147.7796912.4816747.9316563.2156463.8895628.1265619.5555616.0555523.4485555.9615568.5265529.4635577.8445551.0365513.0465445.8085393.355395.9475366.0835306.7785179.0855199.8685168.8755001.3955031.235035.7775035.7244993.7254931.0954921.0424847.0554806.4874813.9084887.8444952.1934859.6274953.135060.2575042.1614966.4994876.7314937.4294931.524NANANA
us-gaap:Liabilities █▇▇▆▆▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▂▁▁▁6305.5836100.3495903.1225737.6395655.8134922.584888.1384902.6774830.0114899.1944952.9354936.8724991.7064968.9534922.8074841.8514797.7564811.0594804.7164743.7824620.7584660.8954636.674467.4574505.8924508.3974509.1214460.334392.2924380.1594304.1214264.6474269.2864328.8644392.0914300.7864395.2044500.7294483.524412.5114327.3914386.5144386.237NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▆▆▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▁▁▁▁7147.7796912.4816747.9316563.2156463.8895628.1265619.5555616.0555523.4485555.9615568.5265529.4635577.8445551.0365513.0465445.8085393.355395.9475366.0835306.7785179.0855199.8685168.8755001.3955031.235035.7775035.7244993.7254931.0954921.0424847.0554806.4874813.9084887.8444952.1934859.6274953.135060.2575042.1614966.4994876.7314937.4294931.524NANANA
us-gaap:StockholdersEquity █▇██▇▅▆▅▅▄▃▃▂▂▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▂▁▂▂▂▂▂▂▂▂▂▂▂▁▁▁842.196812.132844.809825.576808.076705.546731.417713.378693.437656.767615.591592.591586.138582.083590.239603.957595.594584.888561.367562.996558.327538.973532.205533.938525.338527.38526.603533.395538.803540.883542.934541.84544.622558.98560.102558.841557.926559.528558.641553.988549.34550.915545.287541.173527.681519.131
us-gaap:TierOneRiskBasedCapital NANA604.833NANANA579.216NANANA528.042NANANA479.259NANANA443.574NANANA402.876NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:TierOneRiskBasedCapital dei:LegalEntity wabc:WestamericaBankNANA484.27NANANA415.73NANANA415.575NANANA383.796NANANA344.739NANANA340.918NANANA349.12NANANA360.809NANANA378.921NANANA383.375NANANA397.054NANANA
  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 us-gaap:ConsolidatedEntities srt:ParentCompanyNANA78.364NANANA122.663NANANA72.878NANANA53.409NANANA64.054NANANA26.453NANANANANANANANANANANANANANANANANANANANANANANA
  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 NANA87.584NANANA87.232NANANA83.622NANANA81.538NANANA80.684NANANA82.653NANANA80.052NANANA77.201NANANA80.972NANANA77.942NANANA76.767NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingAndBuildingImprovementsNANA42.96NANANA42.529NANANA41.912NANANA41.641NANANA40.992NANANA40.795NANANA40.939NANANA41.092NANANA44.009NANANA42.454NANANA42.783NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA26.227NANANA26.793NANANA23.845NANANA22.284NANANA21.874NANANA24.266NANANA21.438NANANA18.365NANANA18.805NANANA18.292NANANA16.364NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandNANA11.453NANANA11.691NANANA11.691NANANA11.796NANANA11.896NANANA11.896NANANA11.933NANANA11.983NANANA11.983NANANA11.233NANANA11.395NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA6.944NANANA6.219NANANA6.174NANANA5.817NANANA5.922NANANA5.696NANANA5.742NANANA5.761NANANA6.175NANANA5.963NANANA6.225NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA54.771NANANA52.635NANANA49.115NANANA46.237NANANA44.118NANANA43.96NANANA42.2NANANA39.887NANANA42.333NANANA41.394NANANA40.489NANANA
 us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingAndBuildingImprovementsNANA28.922NANANA28.353NANANA27.178NANANA26.249NANANA25.18NANANA24.024NANANA23.267NANANA22.321NANANA24.237NANANA22.987NANANA22.052NANANA
 us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixturesNANA20.321NANANA18.877NANANA16.969NANANA15.198NANANA14.339NANANA15.308NANANA14.269NANANA13.113NANANA13.527NANANA13.43NANANA13.129NANANA
 us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA5.528NANANA5.405NANANA4.968NANANA4.79NANANA4.599NANANA4.628NANANA4.664NANANA4.453NANANA4.569NANANA4.977NANANA5.308NANANA
us-gaap:AmortizationOfIntangibleAssets ▁▁▁▁▁▁▁▁▁▂▃▃▃▃▄▄▄▄▅▅▅▅▅▅▅▅▆▆▆▆▆▆▆▆▇▇▇▇████0.0680.0690.0690.0720.0730.0730.0730.0760.0790.310.4470.4510.4530.570.7550.760.7620.80.8620.8670.870.9050.9480.9520.9551.0011.0511.0561.0581.1051.1571.1631.1651.2191.2921.3361.3391.4021.471.4771.481.548NANANA1.598
us-gaap:PropertyPlantAndEquipmentNet ▁▁▂▂▃▄▃▃▃▃▃▄▅▅▄▄▄▅▅▆▇▇▇█▇▇▇▆▆▅▆▇▇▇▇▇▇▇▅▅▄▅▅32.0832.21632.81333.43734.06135.40334.59734.0834.01433.93434.50735.39135.77435.7935.30135.50735.56436.02536.56637.05937.75938.04538.69339.24437.94538.31337.85237.33537.42436.67537.31437.97238.26738.51938.63938.38637.86737.82736.54836.09835.01535.70436.278NANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities,us-gaap:InvestmentsInAndAdvancesToAffiliatesCategorization srt:ParentCompany,wabc:BankSubsidiaryNANA730.248NANANA573.931NANANA509.125NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Goodwill ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673121.673NANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▁▁▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▃▃▃▃▃▄▄▄▄▅▅▅▅▆▆▆▆▇▇▇██0.9671.0351.1041.1731.2451.3181.3911.4641.541.6191.9292.3762.8273.283.854.6055.3656.1276.9277.7898.6569.52610.43111.37912.33113.28614.28715.33816.39417.45218.55719.71420.87722.04223.26124.55325.88827.22728.62930.09931.576NA34.604NANANA
us-gaap:OperatingLeaseRightOfUseAsset ██▇▇▆▇▇██▇▁20.69420.60918.83219.09815.75717.24617.13619.72120.50617.8910.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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
  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:DeferredIncomeTaxLiabilitiesNet ▃▁█12.816.20425.778NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo █▄▅▁4.9414.6194.6914.426NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▃▁█▆3.3533.0253.963.689NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▆▁█▅2.1621.7952.3372.078NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA1.089NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA1.968NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 █▇██▇▅▆▅▅▄▃▃▂▂▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▂▁▂▂▂▂▂▂▂▂▂▂▂▁▁▁842.196812.132844.809825.576808.076705.546731.417713.378693.437656.767615.591592.591586.138582.083590.239603.957595.594584.888561.367562.996558.327538.973532.205533.938525.338527.38526.603533.395538.803540.883542.934541.84544.622558.98560.102558.841557.926559.528558.641553.988549.34550.915545.287541.173527.681519.131
us-gaap:CommonStockValue ███████▇▇▇▆▆▆▆▅▅▅▅▃▂▂▁▁▁▁▁▁▁▂▂▁470.33469.85466.006467.201467.351465.701465.46462.653459.369455.304448.351447.785443.338439.817431.734425.655424.479422.67404.606391.601389.68379.893378.858378.649377.339374.958378.132380.195382.182383.49378.946NANANA372.012NANANANANANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▇▇▆▆▆▅▅▄▄▄▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂284.91273.346264.356254.717246.958238.903239.135229.5220.173211.941205.841197.477191.167184.185173.804180.202175.446170.128165.302160.861155.229150.928150.094145.513141.3140.111140.468140.756141.356145.826156.964163.921165.889166.928170.364170.075169.164168.758166.437165.735162.752166.523163.519NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▇▆██▇▃▄▄▄▃▂▁▁▁▃▃▃▃▃▄▄▄▃▄▃▄▃▄▄▄▃▃▃▄▄▄▄▄▄▄▄▃▃86.92168.901114.412103.62393.7320.17126.05120.45413.124-11.249-39.996-54.066-49.9-43.452-16.832-3.433-5.864-9.443-10.0749.00111.8856.6190.6757.1983.9889.65.2929.73312.5548.8564.3134.124.52415.37214.62514.45413.0312.1811.36910.7958.2512.5260.159NANANA
  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 ▁▄▁▄▁█▂▃▂▃▂▄▃▃▂▃▂▃▂13.19432.27211.50430.31711.47254.45116.04125.1216.10423.43716.20530.52423.42426.47615.66824.70215.1125.27418.459NANANA12.69723.17917.21817.3124.01512.75811.79233.7468.21828.2126.38622.50129.72941.52415.25232.95933.36125.1929.34932.49324.98152.0172.63835.334
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▇█▄▁▆▆▆██▅▆▇▆▆▇▇█▆-74.203-9.29683.23-211.842-506.61-113.7-50.968-77.29755.74250.226-128.511-71.66636.55-89.936-82.627-25.322-9.44444.135-92.772NANANA-7.855-20.78862.655-136.276-190.125-61.31363.481-107.30540.3217.479.781-76.5811.934130.204-145.6699.228-7.51346.90926.6611.58812.673101.71761.041123.084
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▄▃▂█▂▂▂▁▁▂▁▂▂▂▂▁▂▂134.481222.206127.57779.669691.33-9.544-7.29149.23-75.048-72.1599.93-65.34413.56544.06580.20433.015-23.11915.13565.217NANANA159.615-23.41-37.717-14.4222.60887.989-19.20930.37134.91-31.307-77.35-81.84481.755-124.689-89.76-31.1344.44367.536-84.048-24.717-43.03-103.805-22.668-266.324
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▅██▁▇▂▂▃73.472245.182222.311-101.856196.192-68.793-42.218-2.947NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  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 ▄▁█-0.958-22.71521.696NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▄▁▄▁█▂▃▂▃▂▄▃▃▂▃▂▃▂13.19432.27211.50430.31711.47254.45116.04125.1216.10423.43716.20530.52423.42426.47615.66824.70215.1125.27418.459NANANA12.69723.17917.21817.3124.01512.75811.79233.7468.21828.2126.38622.50129.72941.52415.25232.95933.36125.1929.34932.49324.98152.0172.63835.334
us-gaap:NetIncomeLoss █▇█▇▆▆▇▇▇▇▆▆▆▆▁▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▆▆▆▇▇▇▇▇▇▇████22.57920.14723.83820.05119.56216.96220.72820.3919.62519.64619.05516.99318.0117.5064.1615.01715.79915.04914.45315.62814.54614.22614.57814.85714.76114.55715.02815.15415.15715.30716.05616.73817.11217.27119.13620.02220.96421.00521.80522.43221.26922.38223.73123.70923.56123.576
  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 ▆▇█▄▁▆▆▆██▅▆▇▆▆▇▇█▆-74.203-9.29683.23-211.842-506.61-113.7-50.968-77.29755.74250.226-128.511-71.66636.55-89.936-82.627-25.322-9.44444.135-92.772NANANA-7.855-20.78862.655-136.276-190.125-61.31363.481-107.30540.3217.479.781-76.5811.934130.204-145.6699.228-7.51346.90926.6611.58812.673101.71761.041123.084
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▂▃▃▁▇▆▅▅▃▃▃▄▆▄▅▄▃▃▃▄▃▃█▃▆▆▄▆▃▂▃▃▄▅▅▄▇▅▇▂▃▄▃▃▃0.6550.1450.5180.293-0.4071.7961.4991.071.0320.3930.2930.5210.8961.4130.740.930.5490.5010.5190.3080.7080.2830.4252.2160.5071.3261.3990.6961.530.1660.1120.4710.4930.6170.9591.2380.6971.941.1111.9480.0730.1770.7910.2090.190.258
  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 ▃▄▃▂█▂▂▂▁▁▂▁▂▂▂▂▁▂▂134.481222.206127.57779.669691.33-9.544-7.29149.23-75.048-72.1599.93-65.34413.56544.06580.20433.015-23.11915.13565.217NANANA159.615-23.41-37.717-14.4222.60887.989-19.20930.37134.91-31.307-77.35-81.84481.755-124.689-89.76-31.1344.44367.536-84.048-24.717-43.03-103.805-22.668-266.324
us-gaap:PaymentsOfDividendsCommonStock █▇███████▆▆▆▆▅▅▄▄▄▃▂▂▂▂▁▁▁▂▂▂▃▃▂▂▃▃▃▄▄▅▄▄▅▅▅▅▅11.01510.99111.02211.04311.11611.10411.09311.06311.04110.74510.69110.68310.65310.60810.55810.26110.25710.22310.0129.9969.9979.9199.9569.7019.7129.7559.8349.8689.97310.08610.1479.8989.96710.08410.1310.18810.29310.39410.52810.26610.410.47610.50510.49610.55710.536
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▁▅▂▁█▁▁▁▁▁▁0.00.2324.7621.8680.6199.2470.00.00.488-0.00.00.0NANA0.00.0NANA-0.3560.00.3565.4240.0641.3385.8237.8677.8688.45513.64522.7117.53112.39611.95115.44212.81312.60514.42111.6615.44313.37819.64512.0396.475.02912.4164.804
  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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value470469466467467465465462459455448447443439431425424422404391389379378378377374378380382383378372
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.66.86.97.17.28.38.38.28.38.28.18.17.97.97.87.87.97.87.57.47.57.37.37.67.57.47.57.67.87.87.87.5

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value26262626262627272626262626262626262525
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2626262626262727262626262626262626262525252525252525252526262626262727272727282828282929
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2626262626262727262626262626262626262525252525252525252526262626262727272727282828282929
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2626262627272626262626262626252525252525262626262627272728282829292929
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value2626262627262626262626262626252525252525252626262627272728282829292929
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EmployeeStockOption


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value510000.0598000.0567000.0599000.0514000.0379000.0436000.0463000.0326000.0482000.0491000.0376000.0352000.0299000.0771000.0779000.01297000.01043000.01376000.01775000.01322000.01050000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Tier One Risk Based Capital To Risk Weighted Assets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value16.040.16220.1630.15360.14850.1282
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets dei:LegalEntity

wabc:WestamericaBank


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value13.00.1180.13010.1250.1170.110.12040.13260.14140.13840.1387
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets81.072.779.881.478.885.80.00.00.00.00.0

Capital To Risk Weighted Assets

us-gaap:CapitalToRiskWeightedAssets

us-gaap:CapitalToRiskWeightedAssets


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value16.680.16830.17030.16170.15950.1339
Percentage of CapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0

us-gaap:CapitalToRiskWeightedAssets dei:LegalEntity

wabc:WestamericaBank


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value13.80.12580.13940.13520.13020.11680.13490.14930.15620.15320.1533
Percentage of CapitalToRiskWeightedAssets82.774.781.983.681.687.20.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value40-25.3643429113-8.91826274348331211-5.631-9.239171915-4.6221219208.055189.15181012181916166.26418192121212224262416242524
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating91.7-59.980.672.4272.3-22.366.069.8111.0122.684.035.432.5-16.3-27.052.658.447.1-13.938.158.759.923.852.726.655.630.835.353.355.844.343.016.044.545.047.446.545.244.448.150.847.130.344.645.544.0

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
Value30273126252226272525252122212321221919211918191919181919191920212222242626282930293032323233
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 InterestAndDividendIncomeOperating69.064.174.264.762.455.667.668.165.364.363.558.664.463.169.863.767.359.759.364.758.356.456.457.055.755.556.957.055.855.654.857.056.954.457.658.457.259.259.459.554.858.759.559.559.659.1

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.9546.9778.0566.7216.3425.2716.2226.6266.2415.7395.9894.2564.9054.283196.0896.5154.8375.2246.0275.1134.744.5484.6774.424.2744.5064.7384.5874.4764.0694.9035.234.7435.5876.4255.8497.5698.1548.4957.8498.4298.9069.1619.2479.532
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating18.016.518.816.215.313.215.616.715.714.515.211.713.812.457.618.419.614.515.718.015.214.113.413.612.812.613.113.613.012.611.112.913.311.713.014.212.515.716.216.314.816.116.216.616.817.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302011-12-312011-09-30
Value7.7546.808110.08.473.111120.06.5990.2522.6943.659100.55.2324.118.7221.25.073.0961.4313.2274.6315.1526.6455.8356.2225.966
Percentage of IncomeTaxesPaidNet100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating18.016.528.60.021.27.832.60.016.70.77.911.031.71.515.812.325.93.615.09.04.29.212.613.615.512.912.311.5

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
Value0.4840.4750.4810.4660.4350.4420.4510.4550.4870.4940.5140.5270.4590.4590.4710.4730.4760.480.50.5230.5410.5520.5630.5850.6170.6590.80.8460.90.8981.0241.1761.2191.2521.3311.3821.4721.5591.8552.0712.1532.3033.0653.0963.1453.534
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 InterestAndDividendIncomeOperating1.11.11.11.11.01.11.11.11.21.31.31.51.31.31.41.41.41.41.51.61.61.61.71.71.81.92.32.42.52.52.83.13.13.13.13.13.13.23.74.04.14.45.65.65.76.3

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
Value43414240413939393938383535343332323232323333333333333334343435363839414345464849505051525152
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 InterestAndDividendIncomeOperating98.998.998.998.999.098.998.998.998.898.798.798.598.798.798.698.698.698.698.598.498.498.498.398.398.298.197.797.697.597.597.296.996.996.996.996.996.996.896.396.095.995.694.494.494.393.7

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value457000.0459000.0520000.0485000.0393000.0432000.0481000.0543000.0388000.0486000.0492000.0555000.0441000.0444000.0494000.0482000.0451000.0504000.0
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating1.01.11.21.20.91.11.21.41.01.21.21.51.21.31.41.51.41.5

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
Value22202320191620201919191618174.1615151514151414141414141515151516161717192020212122212223232323
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 InterestAndDividendIncomeOperating51.047.655.548.547.142.452.051.449.549.848.346.950.650.712.245.347.645.243.546.743.142.343.043.342.942.943.843.442.843.043.744.143.642.744.644.244.743.543.243.240.142.643.242.942.842.1

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value22202320191620201919191618174.1615151514151414141414141515151516161717192020212122212223232323
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 InterestAndDividendIncomeOperating51.047.655.548.547.142.452.051.449.549.848.346.950.650.712.245.347.645.243.546.743.142.343.043.342.942.943.843.442.843.043.744.143.642.744.644.244.743.543.243.240.142.643.242.942.842.1
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value18-45.511109.89193-25.885.5977.33242814-4.166-6.448-23.137-13.3992.4313.5790.631-19.075-2.8845.2665.944-6.5233.21-5.6114.308-4.441-2.8213.6984.5430.193-0.404-10.8480.7470.1711.4240.850.8110.5742.5445.725
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 InterestAndDividendIncomeOperating40.7-107.625.123.9225.2-64.714.018.561.572.835.7-11.5-18.1-67.1-39.27.310.81.9-57.4-8.615.617.7-19.29.4-16.312.7-12.9-8.110.412.80.5-1.1-27.61.80.43.11.81.71.14.910.8

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value18-45.511109.89193-25.885.5977.33242814-4.166-6.448-23.137-13.3992.4313.5790.631-19.075-2.8845.2665.944-6.5233.21-5.6124.308-4.441-2.8213.6984.5430.193-0.404-10.8480.7470.1711.4240.850.8110.5742.544
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating40.7-107.625.123.9225.2-64.714.018.561.572.835.7-11.5-18.1-67.1-39.27.310.81.9-57.4-8.615.617.7-19.29.4-16.312.7-12.9-8.110.412.80.5-1.1-27.61.80.43.11.81.71.14.9
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:CreditCardMerchantDiscount


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.2792.562.7132.862.2772.3582.4242.4942.6572.5582.442.4642.3052.422.3462.1532.0521.875
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating7.46.06.36.95.55.96.16.36.76.56.26.86.57.06.96.56.25.6
Percentage of InterestAndDividendIncomeOperating us-gaap:CreditCardMerchantDiscount0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebitCard


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.7911.6011.6431.6111.4591.4681.5681.6411.6411.5071.6841.6561.6981.6051.571.7841.5861.481
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax54.662.560.656.364.162.364.765.861.858.969.067.273.766.366.982.977.379.0
Percentage of InterestAndDividendIncomeOperating4.03.83.83.93.53.73.94.14.13.84.34.64.84.74.65.44.84.4
Percentage of InterestAndDividendIncomeOperating us-gaap:DebitCard0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DepositAccount


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.2353.3043.4523.2983.1514.2484.3744.514.4934.5044.4964.6154.6454.7524.7554.9894.9454.923
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax98.7129.1127.2115.3138.4180.2180.4180.8169.1176.1184.3187.3201.5196.4202.7231.7241.0262.6
Percentage of InterestAndDividendIncomeOperating7.37.88.08.07.610.611.011.411.311.411.412.713.113.813.915.114.914.8
Percentage of InterestAndDividendIncomeOperating us-gaap:DepositAccount0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FiduciaryAndTrust


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.8270.8010.7650.7560.7140.7770.7640.7330.7490.7170.7360.7330.7260.7430.7390.7180.7160.702
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax25.231.328.226.431.433.031.529.428.228.030.229.731.530.731.533.334.937.4
Percentage of InterestAndDividendIncomeOperating1.91.91.81.81.71.91.91.81.91.81.92.02.02.22.22.22.22.1
Percentage of InterestAndDividendIncomeOperating us-gaap:FiduciaryAndTrust0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancialServiceOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.4910.4690.4570.4540.420.5060.5130.580.5850.5770.6210.6650.650.6310.620.6520.6620.65
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax15.018.316.815.918.421.521.223.322.022.625.527.028.226.126.430.332.334.7
Percentage of InterestAndDividendIncomeOperating1.11.11.11.11.01.31.31.51.51.51.61.81.81.81.82.02.02.0
Percentage of InterestAndDividendIncomeOperating us-gaap:FinancialServiceOther0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

wabc:ATMProcessingFees


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.6180.6010.570.6060.5180.5790.6960.7250.7220.6330.7030.6870.6980.6640.6960.6840.6540.575
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax18.823.521.021.222.724.628.729.127.224.728.827.930.327.429.731.831.930.7
Percentage of InterestAndDividendIncomeOperating1.41.41.31.51.21.41.71.81.81.61.81.92.01.92.02.12.01.7
Percentage of InterestAndDividendIncomeOperating wabc:ATMProcessingFees0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

wabc:FinancialServicesCommission


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0950.070.0660.0580.1230.1250.1220.0750.0930.1010.1120.1320.1410.1140.1550.1480.1420.195
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.92.72.42.05.45.35.03.03.53.94.65.46.14.76.66.96.910.4
Percentage of InterestAndDividendIncomeOperating0.20.20.20.10.30.30.30.20.20.30.30.40.40.30.50.40.40.6
Percentage of InterestAndDividendIncomeOperating wabc:FinancialServicesCommission0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value71476912674765636463562856195616552355555568552955775551551354455393539553665306517951995168500150315035503549934931492148474806481348874952485949535060504249664876493749314975
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value860745630605
Percentage of Assets12.813.311.311.0
Percentage of Assets12.813.311.311.0
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value63056100590357375655492248884902483048994952493649914968492248414797481148044743462046604636446745054508450944604392438043044264426943284392430043954500448344124327438643864470
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets88.288.387.587.487.587.587.087.387.488.288.989.389.589.589.388.989.089.289.589.489.289.689.789.389.689.589.589.389.189.088.888.788.788.688.788.588.788.988.988.888.788.888.989.8

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value15141415
Percentage of Liabilities0.30.30.30.3
Percentage of Assets0.20.30.30.3
Percentage of Assets srt:ParentCompany1.81.92.42.5

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value71476912674765636463562856195616552355555568552955775551551354455393539553665306517951995168500150315035503549934931492148474806481348874952485949535060504249664876493749314975
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value860745630605
Percentage of LiabilitiesAndStockholdersEquity12.813.311.311.0
Percentage of Assets12.813.311.311.0
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value842812844825808705731713693656615592586582590603595584561562558538532533525527526533538540542541544558560558557559558553549550545541527519505409394
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.811.712.512.612.512.513.012.712.611.811.110.710.510.510.711.111.010.810.510.610.810.410.310.710.410.510.510.710.911.011.211.311.311.411.311.511.311.111.111.211.311.211.10.00.00.010.20.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value844731615590
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets12.513.011.110.7
Percentage of Assets srt:ParentCompany98.298.197.697.5

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value8668114103930.171262013-11.249-39.996-54.066-49.9-43.452-16.832-3.433-5.864-9.443-10.0749.001116.6190.6757.1983.9889.65.2929.733128.8564.3134.124.524151414131211108.2512.7242.7242.4852.4852.4092.99
Percentage of StockholdersEquity10.38.513.512.611.60.03.62.91.9-1.7-6.5-9.1-8.5-7.5-2.9-0.6-1.0-1.6-1.81.62.11.20.11.30.81.81.01.82.31.60.80.80.82.82.62.62.32.22.01.91.50.50.50.50.50.60.8
Percentage of Assets1.21.01.71.61.50.00.50.40.2-0.2-0.7-1.0-0.9-0.8-0.3-0.1-0.1-0.2-0.20.20.20.10.00.10.10.20.10.20.30.20.10.10.10.30.30.30.30.20.20.20.20.10.10.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value470469466467467465465462459455448447443439431425424422404391389379378378377374378380382383378371371373372371372375377374375379378376372366352
Percentage of StockholdersEquity55.857.955.256.657.866.063.664.966.269.372.875.675.675.673.170.571.372.372.169.669.870.571.270.971.871.171.871.370.970.969.868.568.266.866.466.466.867.267.667.668.368.869.569.570.772.585.9
Percentage of Assets6.66.86.97.17.28.38.38.28.38.28.18.17.97.97.87.87.97.87.57.47.57.37.37.67.57.47.57.67.87.87.87.77.77.67.57.67.57.47.57.57.77.77.70.00.07.40.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DeferredCompensationShareBasedPayments


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value0.0350.0350.0350.0350.0350.7710.7710.7710.7710.7711.3951.5331.533
Percentage of StockholdersEquity0.00.00.00.00.00.10.10.10.10.10.20.30.3
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:DeferredCompensationShareBasedPayments0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value2842732642542462382392292202112051971911841731801751701651601551501501451411401401401411451561631651661701701691681661651621661631551451421335461
Percentage of StockholdersEquity33.833.731.330.930.633.932.732.231.832.333.433.332.631.629.429.829.529.129.428.627.828.028.227.326.926.626.726.426.227.028.930.330.529.930.430.430.330.229.829.929.630.230.028.727.627.426.313.215.7
Percentage of Assets4.04.03.93.93.84.24.34.14.03.83.73.63.43.33.23.33.33.23.13.03.02.92.92.92.82.82.82.82.93.03.23.43.43.43.43.53.43.33.33.33.33.43.30.00.00.02.70.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Tier One Risk Based Capital

us-gaap:TierOneRiskBasedCapital

us-gaap:TierOneRiskBasedCapital


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value604579528479443402
Percentage of TierOneRiskBasedCapital100.0100.0100.0100.0100.0100.0
Percentage of Assets9.010.39.58.78.37.8

us-gaap:TierOneRiskBasedCapital dei:LegalEntity

wabc:WestamericaBank


Tier
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value484415415383344340349360378383397
Percentage of TierOneRiskBasedCapital80.171.878.780.177.784.60.00.00.00.00.0
Percentage of Assets7.27.47.57.06.46.66.97.47.77.68.1
Percentage of Assets wabc:WestamericaBank0.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

us-gaap:CashAndCashEquivalentsAtCarryingValue

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value7812272536426
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0
Percentage of Assets1.22.21.31.01.20.5
Percentage of Assets srt:ParentCompany9.116.411.68.80.00.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value8787838180828077807776
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.61.51.51.51.61.61.61.61.51.6

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4242414140404041444242
Percentage of PropertyPlantAndEquipmentGross49.148.850.151.150.849.451.153.254.454.555.7
Percentage of Assets0.60.80.80.80.80.80.80.80.90.80.9
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2626232221242118181816
Percentage of PropertyPlantAndEquipmentGross29.930.728.527.327.129.426.823.823.223.521.3
Percentage of Assets0.40.50.40.40.40.50.40.40.40.40.3
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1111111111111111111111
Percentage of PropertyPlantAndEquipmentGross13.113.414.014.514.714.414.915.514.814.414.8
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.2
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6.9446.2196.1745.8175.9225.6965.7425.7616.1755.9636.225
Percentage of PropertyPlantAndEquipmentGross7.97.17.47.17.36.97.27.57.67.78.1
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5452494644434239424140
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.90.90.80.80.90.80.80.90.80.8

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2828272625242322242222
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment52.853.955.356.857.154.655.156.057.355.554.5
Percentage of Assets0.40.50.50.50.50.50.50.50.50.50.4
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2018161514151413131313
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment37.135.934.532.932.534.833.832.932.032.432.4
Percentage of Assets0.30.30.30.30.30.30.30.30.30.30.3
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5.5285.4054.9684.794.5994.6284.6644.4534.5694.9775.308
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment10.110.310.110.410.410.511.111.210.812.013.1
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-03-31
Value68000.069000.069000.072000.073000.073000.073000.076000.079000.0310000.0447000.0451000.0453000.0570000.0755000.0760000.0762000.0800000.0862000.0867000.0870000.0905000.0948000.0952000.0955000.01001000.01051000.01056000.01058000.01105000.01157000.01163000.01165000.01219000.01292000.01336000.01339000.01402000.01470000.01477000.01480000.01548000.01598000.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CoreDeposits


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value68000.069000.069000.072000.073000.073000.073000.076000.079000.0310000.0447000.0451000.0453000.0541000.0716000.0721000.0723000.0753000.0811000.0816000.0819000.0846000.0885000.0889000.0892000.0928000.0973000.0978000.0980000.01015000.01061000.01067000.01069000.01107000.01172000.01215000.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.094.994.894.994.994.194.194.194.193.593.493.493.492.792.692.692.691.991.791.791.890.890.790.9
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CoreDeposits0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3232323334353434343334353535353535363637373838393738373737363737383838383737363635353638
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.50.50.50.50.60.60.60.60.60.60.60.60.60.60.70.70.70.70.70.70.70.70.80.80.80.80.70.80.70.80.80.80.80.80.80.80.70.70.70.70.70.70.8

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities

srt:ParentCompany


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value1011109.639
Percentage of PropertyPlantAndEquipmentNet31.931.830.127.3
Percentage of Assets0.20.20.20.2
Percentage of Assets srt:ParentCompany1.21.51.61.6

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1414141515161718191920
Percentage of PropertyPlantAndEquipmentNet42.841.042.743.643.243.346.750.351.253.357.1
Percentage of Assets0.20.30.30.30.30.30.40.40.40.40.4
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5.9067.9166.8767.0867.5358.9587.1695.2525.2784.8623.235
Percentage of PropertyPlantAndEquipmentNet18.022.919.920.120.623.218.914.113.713.38.9
Percentage of Assets0.10.10.10.10.10.20.10.10.10.10.1
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Land


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1111111111111111111111
Percentage of PropertyPlantAndEquipmentNet34.933.833.933.432.530.731.532.131.030.731.4
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.2
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1.4160.8141.2061.0271.3231.0681.0781.3081.6060.9860.917
Percentage of PropertyPlantAndEquipmentNet4.32.43.52.93.62.82.83.54.22.72.5
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities, us-gaap:InvestmentsInAndAdvancesToAffiliatesCategorization

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:ParentCompany, wabc:BankSubsidiary


Investments
Period End2020-12-312019-12-312018-12-31
Value730573509
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0
Percentage of Assets10.810.29.1
Percentage of Assets srt:ParentCompany wabc:BankSubsidiary0.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121121
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.81.81.91.92.22.22.22.22.22.22.22.22.22.22.22.32.32.32.32.32.32.42.42.42.42.42.42.52.52.52.52.52.52.52.52.52.42.42.42.52.52.52.4

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.9671.0351.1041.1731.2451.3181.3911.4641.541.6191.9292.3762.8273.283.854.6055.3656.1276.9277.7898.6569.5261011121314151617181920222324252728303134
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.20.20.20.20.20.30.30.30.30.40.40.40.40.50.50.50.50.50.60.60.60.7

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value202018191517171920170.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.30.30.30.30.20.30.30.40.40.30.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value163160159160167176164152160165162165168159158164168165171154160163165158165160166160162169176176181185188204213227226229234229225256
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.32.32.42.42.63.12.92.72.93.02.93.03.02.92.93.03.13.13.22.93.13.13.23.23.33.23.33.23.33.43.63.73.83.83.84.24.34.54.54.64.84.64.65.1

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value40373640
Percentage of OtherAssets25.522.922.725.6
Percentage of Assets0.60.70.70.7
Percentage of Assets srt:ParentCompany4.75.05.96.7

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-31
Value126.20425
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0
Percentage of Assets0.20.10.4

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value4941000.04619000.04691000.04426000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3353000.03025000.03960000.03689000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.00.00.10.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value2162000.01795000.02337000.02078000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value1089000.0
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
Value1968000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value202018191517171920170.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.30.30.30.30.20.30.30.40.40.30.0

us-gaap:OperatingLeaseLiability us-gaap:BalanceSheetLocation

us-gaap:OtherLiabilities


Operating
Period End2020-12-312019-12-312018-12-31
Value18170.0
Percentage of OperatingLeaseLiability100.0100.00.0
Percentage of Assets0.30.30.0
Percentage of Assets us-gaap:OtherLiabilities0.00.00.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value21211920
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets0.30.30.30.3

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value730000.0778000.0828000.0910000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value842812844825808705731713693656615592586582590603595584561562558538532533525527526533538540542541544558560558557559558553549550545541527519505409394
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.811.712.512.612.512.513.012.712.611.811.110.710.510.510.711.111.010.810.510.610.810.410.310.710.410.510.510.710.911.011.211.311.311.411.311.511.311.111.111.211.311.211.10.00.00.010.20.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value844731615590
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets12.513.011.110.7
Percentage of Assets srt:ParentCompany98.298.197.697.5

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-03-312009-12-312008-12-312007-12-31
Value8668114103930.171262013-11.249-39.996-54.066-49.9-43.452-16.832-3.433-5.864-9.443-10.0749.001116.6190.6757.1983.9889.65.2929.733128.8564.3134.124.524151414131211108.2512.7242.7242.4852.4852.4092.99
Percentage of StockholdersEquity10.38.513.512.611.60.03.62.91.9-1.7-6.5-9.1-8.5-7.5-2.9-0.6-1.0-1.6-1.81.62.11.20.11.30.81.81.01.82.31.60.80.80.82.82.62.62.32.22.01.91.50.50.50.50.50.60.8
Percentage of Assets1.21.01.71.61.50.00.50.40.2-0.2-0.7-1.0-0.9-0.8-0.3-0.1-0.1-0.2-0.20.20.20.10.00.10.10.20.10.20.30.20.10.10.10.30.30.30.30.20.20.20.20.10.10.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value470469466467467465465462459455448447443439431425424422404391389379378378377374378380382383378371371373372371372375377374375379378376372366352
Percentage of StockholdersEquity55.857.955.256.657.866.063.664.966.269.372.875.675.675.673.170.571.372.372.169.669.870.571.270.971.871.171.871.370.970.969.868.568.266.866.466.466.867.267.667.668.368.869.569.570.772.585.9
Percentage of Assets6.66.86.97.17.28.38.38.28.38.28.18.17.97.97.87.87.97.87.57.47.57.37.37.67.57.47.57.67.87.87.87.77.77.67.57.67.57.47.57.57.77.77.70.00.07.40.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DeferredCompensationShareBasedPayments


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value0.0350.0350.0350.0350.0350.7710.7710.7710.7710.7711.3951.5331.533
Percentage of StockholdersEquity0.00.00.00.00.00.10.10.10.10.10.20.30.3
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:DeferredCompensationShareBasedPayments0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value2842732642542462382392292202112051971911841731801751701651601551501501451411401401401411451561631651661701701691681661651621661631551451421335461
Percentage of StockholdersEquity33.833.731.330.930.633.932.732.231.832.333.433.332.631.629.429.829.529.129.428.627.828.028.227.326.926.626.726.426.227.028.930.330.529.930.430.430.330.229.829.929.630.230.028.727.627.426.313.215.7
Percentage of Assets4.04.03.93.93.84.24.34.14.03.83.73.63.43.33.23.33.33.23.13.03.02.92.92.92.82.82.82.82.93.03.23.43.43.43.43.53.43.33.33.33.33.43.30.00.00.02.70.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value470469466467467465465462459455448447443439431425424422404391389379378378377374378380382383378372
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.66.86.97.17.28.38.38.28.38.28.18.17.97.97.87.87.97.87.57.47.57.37.37.67.57.47.57.67.87.87.87.5

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value284273264254246238239229220211205197191184173180175170165160155150150145141140140140141145156163165166170170169168166165162166163133
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.04.03.93.93.84.24.34.14.03.83.73.63.43.33.23.33.33.23.13.03.02.92.92.92.82.82.82.82.93.03.23.43.43.43.43.53.43.33.33.33.33.43.32.7

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value8668114103930.171262013-11.249-39.996-54.066-49.9-43.452-16.832-3.433-5.864-9.443-10.0749.001116.6190.6757.1983.9889.65.2929.733128.8564.3134.124.524151414131211108.2512.5260.1593.7141.04
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.01.71.61.50.00.50.40.2-0.2-0.7-1.0-0.9-0.8-0.3-0.1-0.1-0.2-0.20.20.20.10.00.10.10.20.10.20.30.20.10.10.10.30.30.30.30.20.20.20.20.10.00.10.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1332113011541625162316302326152415251812231717241211338.218282622294115323325293224522.63835
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating29.876.326.873.327.6136.240.263.340.659.441.184.265.876.745.874.545.675.855.637.567.650.051.069.936.633.394.922.474.367.255.669.391.732.568.266.248.555.361.945.594.24.863.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-74.203-9.29683-211.842-506.61-113.7-50.968-77.2975550-128.511-71.66636-89.936-82.627-25.322-9.44444-92.772-7.855-20.78862-136.276-190.125-61.31363-107.305407.479-76.5811130-145.6699.228-7.51346261.5881210161123
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-167.6-22.0193.7-512.1-1219.6-284.3-127.8-194.7140.7127.2-325.8-197.7102.7-260.6-241.6-76.4-28.5132.4-279.4-23.2-60.6182.0-401.8-553.6-175.7179.3-301.7109.819.5203.2-189.227.8287.6-310.619.1-14.990.350.23.023.1184.3110.8219.8

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13422212779691-9.544-7.29149-75.048-72.1599.93-65.34413448033-23.1191565159-23.41-37.717-14.422287-19.2093034-31.307-77.35-81.84481-124.689-89.76-31.134467-84.048-24.717-43.03-103.805-22.668-266.324
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating303.7525.1297.0192.61664.3-23.9-18.3124.0-189.4-182.825.2-180.238.1127.7234.599.6-69.745.4196.4471.0-68.3-109.6-42.565.8252.1-54.385.495.1-82.5-197.0-202.3190.6-275.4-191.4-64.588.1129.9-158.3-47.1-78.4-188.0-41.2-475.6

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value73245222-101.856196-68.793-42.218-2.947
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating165.9579.4517.5-246.2472.3-172.0-105.9-7.4

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-31
Value-0.958-22.71521
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1332113011541625162316302326152415251812231717241211338.218282622294115323325293224522.63835
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating29.876.326.873.327.6136.240.263.340.659.441.184.265.876.745.874.545.675.855.637.567.650.051.069.936.633.394.922.474.367.255.669.391.732.568.266.248.555.361.945.594.24.863.1

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
Value22202320191620201919191618174.1615151514151414141414141515151516161717192020212122212223232323
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 InterestAndDividendIncomeOperating51.047.655.548.547.142.452.051.449.549.848.346.950.650.712.245.347.645.243.546.743.142.343.043.342.942.943.843.442.843.043.744.143.642.744.644.244.743.543.243.240.142.643.242.942.842.1

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value22202320191620201919191618174.1615151514151414141414141515151516161717192020212122212223232323
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 InterestAndDividendIncomeOperating51.047.655.548.547.142.452.051.449.549.848.346.950.650.712.245.347.645.243.546.743.142.343.043.342.942.943.843.442.843.043.744.143.642.744.644.244.743.543.243.240.142.643.242.942.842.1
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-74.203-9.29683-211.842-506.61-113.7-50.968-77.2975550-128.511-71.66636-89.936-82.627-25.322-9.44444-92.772-7.855-20.78862-136.276-190.125-61.31363-107.305407.479-76.5811130-145.6699.228-7.51346261.5881210161123
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-167.6-22.0193.7-512.1-1219.6-284.3-127.8-194.7140.7127.2-325.8-197.7102.7-260.6-241.6-76.4-28.5132.4-279.4-23.2-60.6182.0-401.8-553.6-175.7179.3-301.7109.819.5203.2-189.227.8287.6-310.619.1-14.990.350.23.023.1184.3110.8219.8

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
Value0.6550.1450.5180.293-0.4071.7961.4991.071.0320.3930.2930.5210.8961.4130.740.930.5490.5010.5190.3080.7080.2830.4252.2160.5071.3261.3990.6961.530.1660.1120.4710.4930.6170.9591.2380.6971.941.1111.9480.0730.1770.7910.2090.190.258
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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value13422212779691-9.544-7.29149-75.048-72.1599.93-65.34413448033-23.1191565159-23.41-37.717-14.422287-19.2093034-31.307-77.35-81.84481-124.689-89.76-31.134467-84.048-24.717-43.03-103.805-22.668-266.324
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating303.7525.1297.0192.61664.3-23.9-18.3124.0-189.4-182.825.2-180.238.1127.7234.599.6-69.745.4196.4471.0-68.3-109.6-42.565.8252.1-54.385.495.1-82.5-197.0-202.3190.6-275.4-191.4-64.588.1129.9-158.3-47.1-78.4-188.0-41.2-475.6

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
Value111011111111111111101010101010101010109.9969.9979.9199.9569.7019.7129.7559.8349.8689.97310109.8989.96710101010101010101010101010
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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.00.2324.7621.8680.6199.2470.00.00.488-0.00.00.00.00.0-0.3560.00.3565.4240.0641.3385.8237.8677.8688.45513221712111512121411151319126.475.029124.804
Percentage of PaymentsForRepurchaseOfCommonStock0.0100.0100.0100.0100.0100.00.00.0100.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value693000.0561000.0946000.01030000.01273000.01549000.01889000.02078000.02328000.02276000.02417000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value126.2042521170.0
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.00.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2222433458576164637583
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:StateAndLocalJurisdiction, us-gaap:CaliforniaFranchiseTaxBoard


Deferred
Period End2020-12-312019-12-312019-06-30
Value0269000.0269000.0
Percentage of DeferredTaxAssetsValuationAllowance0.0100.0100.0

Proceeds From Repayments Of Short Term Debt

us-gaap:ProceedsFromRepaymentsOfShortTermDebt

us-gaap:ProceedsFromRepaymentsOfShortTermDebt


Proceeds
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-5.428213321-14.718-8.935-3.7367.07-10.509-7.1383.5386.885-7.866-9.4322.158142.72-11.49415-0.577-4.035-25.684-0.213-26.82422-2.1134.4851.629.847-18.8184.7858.167-1.943-25.952-25.101-9.0054.772-5.982-2.631-13.027-91.055-22.612-1.492-90.66
Percentage of ProceedsFromRepaymentsOfShortTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount


Affordable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value225000.0200000.0225000.0225000.0225000.0225000.0200000.0225000.0225000.0266000.0113000.0336000.0336000.0336000.0462000.0463000.0462000.0463000.0563000.0562000.0511000.0598000.0662000.0663000.0658000.0658000.0625000.0610000.0771000.0
Percentage of AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2060000.01246000.01639000.01746000.01039000.018000.045000.000215000.022000.069000.072000.040000.080000.0-13000.05000.0-26000.059000.0124000.0103000.054000.047000.0114000.071000.078000.0100000.045000.0104000.030000.087000.0131000.0122000.080000.0104000.099000.0177000.0126000.0139000.0105000.083000.0107000.0112000.016000.042000.0-70000.0
Percentage of AmortizationOfDeferredLoanOriginationFeesNet100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedGainLoss


Debt
Period End2021-06-302021-03-312020-12-31
Value259715
Percentage of DebtSecuritiesAvailableForSaleUnrealizedGainLoss100.0100.0100.0

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal


Debt
Period End2020-12-31
Value-7000.0
Percentage of DebtSecuritiesHeldToMaturityCreditLossExpenseReversal100.0

us-gaap:DepreciationAmortizationAndAccretionNet

us-gaap:DepreciationAmortizationAndAccretionNet


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3.1074.2564.1656.1216.0576.3045.4485.3265.0434.8095.4386.37101.6437.2756.7396.3145.7545.7285.5934.5534.0654.0234.4224.0273.933.2275.0653.1074.1034.694.2934.714.3223.53.5373.5383.4993.7933.5173.5083.4353.9683.774.1783.411
Percentage of DepreciationAmortizationAndAccretionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value111011111111111111101010101010101010109.9969.9979.9199.9569.7019.7129.7559.8349.8689.97310109.8989.967101010101010101010-73.683101010
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value111011111111111111101010101010101010109.9969.9979.9199.9569.7019.7129.7559.8349.8689.97310109.8989.967101010101010101010-73.683101010
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiGainLoss

us-gaap:EquitySecuritiesFvNiGainLoss


Equity
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value34000.071000.00167000.0026000.024000.0
Percentage of EquitySecuritiesFvNiGainLoss100.0100.00.0100.00.0100.0100.0

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
Value585000.0558000.0655000.0485000.0529000.0576000.0823000.0750000.0613000.0517000.0521000.0456000.0764000.01478000.0555000.0543000.02968000.0807000.0775000.02585000.0902000.01893000.0940000.0669000.01014000.0792000.02313000.0592000.0770000.0735000.01271000.0932000.0898000.01089000.01070000.01276000.01081000.01184000.03047000.0737000.01108000.0
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:FinancingReceivablePortfolioSegment

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value75000.013000.069000.046000.093000.0143000.0319000.0233000.0123000.093000.095000.0103000.0420000.0829000.0136000.0128000.0338000.0160000.0325000.01739000.0542000.01421000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery12.82.310.59.517.624.838.831.120.118.018.222.655.056.124.523.611.419.841.967.360.175.1

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value12000.012000.012000.012000.012000.012000.0158000.012000.014000.012000.00000078000.010000.015000.0509000.015000.015000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery2.12.21.82.52.32.119.21.62.32.30.00.00.00.00.02.61.21.919.71.70.8

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value498000.0533000.0574000.0427000.0424000.0421000.0346000.0505000.0476000.0412000.0426000.0353000.0344000.0649000.0419000.0415000.0653000.0637000.0435000.0337000.0345000.0457000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery85.195.587.688.080.273.142.067.377.779.781.877.445.043.975.576.422.078.956.113.038.224.1

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.3310.9290.950.8720.8041.5731.1671.0390.9731.3911.1971.4690.8051.4061.1741.0181.8841.8421.181.9361.4792.1771.2051.4611.3731.0912-1.821-1.481-1.31918-1.742-2.126-3.7694.6024.6334.2414.6986.1433.6525.2215.243
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0580.0-0.00.1780.026-0.00.0480.0230.0880.384-0.00.0410.00.1320.7260.103-0.0010.0880.7641.171
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs6.10.0-0.011.32.2-0.04.91.77.426.1-0.02.90.013.038.55.6-0.14.551.753.8

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.3310.9290.8920.8720.8041.3951.1411.0390.9251.3681.1090.8450.8051.3651.1740.8861.1581.7391.1811.8480.7151.006
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0100.093.9100.0100.088.797.8100.095.198.392.657.5100.097.1100.087.061.594.4100.195.548.346.2

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-0.17.7860.00.0-0.2788.886-0.512-1.4840.010-0.05-0.053-0.31612-0.319-0.025-0.079140.0-6.4280.248202.9476.3130.16.947-1.2540.6290.0985.51-2.5680.0-0.4158.701
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment2100.0100.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-30
Value-0.17.5450.00.00.08.367-0.4630.4630.08.3670.00.0-0.39.537-0.3190.00.271110.0-6.330.0172.6226.330.1360.463
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment2100.096.90.00.0-0.094.290.4-31.20.076.9-0.0-0.094.978.4100.0-0.0-343.079.40.098.50.086.289.0100.3-10.873.6

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.00.2410.00.00.00.2410.00.00.00.2410.00.00.00.2410.00.00.00.2410.00.0-0.0010.2420.00.001
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment2-0.03.10.00.0-0.02.7-0.0-0.00.02.2-0.0-0.0-0.02.0-0.0-0.0-0.01.70.0-0.0-0.41.20.00.0

us-gaap:FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown

us-gaap:FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown


Financing
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0000000041000.0000058000.0000000
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.0100.00.00.00.00.0100.00.00.00.00.00.00.0

us-gaap:IncomeLossFromAffordableHousingProjectsEquityMethodInvestments

us-gaap:IncomeLossFromAffordableHousingProjectsEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value600000.0600000.0-4280000.0640000.0600000.0600000.0-4200000.0600000.0600000.0600000.0-5100000.0900000.0700000.0600000.0-3150000.0450000.0450000.0450000.04500000.0-675000.0-675000.0-675000.0-675000.0-750000.0-750000.0-675000.0-750000.0-750000.0-750000.0
Percentage of IncomeLossFromAffordableHousingProjectsEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap: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
Value3732000.0-1961000.02243000.0-1544000.03325000.0201000.03286000.0-996000.02560000.0-1887000.02100000.0-1198000.02394000.0-1019000.02781000.0-1128000.02159000.0-1744000.01791000.0-304000.01208000.0-1379000.01537000.0-703000.0758000.0-812000.02006000.0-1432000.0538000.0-643000.0171000.0-1332000.0-287000.0199000.0-1213000.0-179000.0-271000.0-733000.0246000.0-235000.0-452000.0613000.0-352000.0-85000.0-399000.0-258000.0
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:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.9570.4720.5710.1530.401-0.8792.724-1.484-1.727-3.175-0.4021.1410.1840.02-26.123-0.6331.179-1.441-1.122-1.192-1.951-0.1150.138-1.134-0.2550.421-1.436-2.6051.8680.756-2.1011.0751.9710.673-0.4181.0956.458-0.183-0.729-1.9360.79-0.219
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value15223514870668-13.1951566-62.322-74.25531-51.28519409352-15.403-6.76859159-31.436-23.90917312-25.233027108-1.37451557.001-60.465-70.45102-77.82-40.332-0.71657104-51.6797.83160-69.688-3.826-164.28
Percentage of IncreaseDecreaseInDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInIncomeTaxes

us-gaap:IncreaseDecreaseInIncomeTaxes


Increase
Period End2020-09-302019-09-30
Value65000.0-3386000.0
Percentage of IncreaseDecreaseInIncomeTaxes100.0100.0

us-gaap:IncreaseDecreaseInIncomeTaxesReceivable

us-gaap:IncreaseDecreaseInIncomeTaxesReceivable


Increase
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value7089000.0-7450000.04572000.0-4572000.0-1653000.0-3163000.08124000.0-1575000.0206000.0-5204000.0
Percentage of IncreaseDecreaseInIncomeTaxesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value27000.016000.0-38000.0-19000.042000.010000.0-28000.0-25000.036000.08000.0-32000.0-45000.035000.015000.0-23000.0-41000.025000.08000.0-33000.0-65000.021000.025000.0-30000.0-81000.04000.021000.0-9000.0-101000.0-6000.05000.0-324000.041000.0-243000.0252000.0-237000.032000.0-278000.0149000.0-142000.0-868000.0-108000.0-220000.045000.0-27000.065000.0-66000.0
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-1.5213.004-0.869-8.0818.8533.62512-17.94181.9522.731.3472.616-2.676-1.1983.243-0.26-0.8951.74-3.584-1.2655.6021.935-1.1710.2420.8224.3130.036-1.6110.1851.530.83-8.8370.663-0.297-3.231-1.2694.655-1.8290.741-4.2442.559-11.653-11.348-9.0588.655
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-0.5762.796-10.518-4.0774.132246.935-24.55618-6.013-4.3733.6561.121-0.984-1.8741.4110.311-2.8641.883-1.7061.853-0.004-3.1830.3683.911-6.858.315-10.988-1.368.507-11.5264.4981.244-6.7264.451100.3891.7710.982-5.1325.65-1.069-1.989-0.912-14.9741.108
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:InformationTechnologyAndDataProcessing

us-gaap:InformationTechnologyAndDataProcessing


Information
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2425000.02390000.02359000.02338000.02324000.02405000.02361000.02374000.02367000.02369000.02299000.02292000.02299000.02340000.02325000.02383000.02188000.02139000.02130000.02114000.02130000.02130000.02107000.02115000.02111000.02108000.02097000.02093000.02115000.02105000.02112000.02139000.02140000.02157000.02213000.02156000.02078000.02083000.02101000.02165000.02122000.02456000.02328000.02187000.02202000.02240000.0
Percentage of InformationTechnologyAndDataProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value44424241413939393939393635343433333333333333333434333434353536373940424546485051535254555556
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:InterestAndDividendIncomeSecurities

us-gaap:InterestAndDividendIncomeSecurities


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value282727252625242322222221201918181717161616151514141313121212121213131313131212121111101011
Percentage of InterestAndDividendIncomeSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeSecuritiesHeldToMaturity

us-gaap:InterestAndDividendIncomeSecuritiesHeldToMaturity


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
Value2.3622.5982.7933.2353.6163.9084.2094.5354.9245.3295.715.9316.2166.1746.4356.7166.9867.2957.5537.7048.0537.3277.1747.0416.3916.2186.2186.4216.7417.0337.2477.4147.5577.738.0888.5758.2187.8547.1156.5516.1325.9136.1876.5796.9927.405
Percentage of InterestAndDividendIncomeSecuritiesHeldToMaturity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio

us-gaap:InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio


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
Value15141415151314141414141414141515151516161718181920202122222223252627293133353839414144444444
Percentage of InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value0.4660.4590.4620.450.4240.4340.4440.4470.4780.4850.5050.5180.4490.450.4610.4610.4650.4690.4910.5120.5310.5430.5540.5730.6010.6420.6710.7090.7540.7540.7930.8090.8470.8990.9691.021.1071.1871.4611.6771.7771.892.0022.0472.182.488
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:InterestExpenseOther

us-gaap:InterestExpenseOther


Interest
Period End2020-12-312020-09-302020-06-302019-06-30
Value001000.00
Percentage of InterestExpenseOther0.00.0100.00.0

us-gaap:InterestExpenseShortTermBorrowings

us-gaap:InterestExpenseShortTermBorrowings


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
Value18000.016000.019000.016000.010000.08000.07000.08000.09000.09000.09000.09000.010000.09000.010000.012000.011000.011000.09000.011000.010000.09000.09000.012000.016000.016000.026000.023000.021000.020000.019000.020000.026000.011000.014000.015000.021000.027000.032000.076000.047000.062000.0453000.0511000.0491000.0537000.0
Percentage of InterestExpenseShortTermBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseTimeDeposits100000OrMore

us-gaap:InterestExpenseTimeDeposits100000OrMore


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value68000.078000.081000.080000.079000.079000.080000.081000.082000.082000.085000.091000.095000.097000.0101000.0103000.0105000.0106000.0114000.0124000.0135000.0137000.0144000.0164000.0182000.0197000.0210000.0219000.0233000.0232000.0253000.0257000.0283000.0304000.0334000.0360000.0414000.0423000.0
Percentage of InterestExpenseTimeDeposits100000OrMore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeDebtSecuritiesAvailableForSaleOperating

us-gaap:InterestIncomeDebtSecuritiesAvailableForSaleOperating


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
Value2624242222212018171716151413121110
Percentage of InterestIncomeDebtSecuritiesAvailableForSaleOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeDepositsWithFinancialInstitutions

us-gaap:InterestIncomeDepositsWithFinancialInstitutions


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value259000.0138000.0112000.084000.0113000.0856000.01396000.01901000.01958000.01738000.01992000.02361000.01764000.01808000.0
Percentage of InterestIncomeDepositsWithFinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value43414240413539393938443535343332343232363333333333333333333334343636384142434547484749494949
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:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxExempt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.2612.3992.652.9113.2283.3623.5713.7774.0734.3154.674.885.0274.8754.9335.1065.2145.3975.5125.4765.5865.625.6855.8015.9976.1336.2446.4236.746.987.2017.3387.4987.5317.657.7887.8087.9527.4817.4537.5937.3746.9796.8126.819
Percentage of InterestIncomeSecuritiesTaxExempt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesTaxable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2625252322212019181818161514131212121111109.6749.4059.128.3937.5546.8596.3485.8765.6835.5755.5025.5915.5355.6045.7055.3484.694.84.6244.2233.7573.8623.9574.199
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value12121212121312121313131313131212121312131213121213131313131414131414131414151414141514151515
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:LossContingencyAccrualPayments us-gaap:LossContingenciesByNatureOfContingency

us-gaap:LossContingencyAccrualPayments

wabc:CustomerRefunds


Loss
Period End2021-06-302021-03-31
Value54000.0385000.0
Percentage of LossContingencyAccrualPayments100.0100.0

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
Value24242424242424242525252723243024242424262525252626262626262627272828282929303031343131313232
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
Value111013109.5541111111211111211112012121111111111111112121213131214141414141413141415151415151515
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
Value0.6620.7830.7570.8330.8211.5871.1041.0510.8890.9581.0911.0070.921.0621.4641.421.3661.2561.2271.1011.1571.3321.0651.2211.0781.3251.3541.4071.5811.5452.0672.2342.3512.5162.2652.5632.2962.4252.5952.6252.4452.3931.981.5942.0281.912
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
Value4.8084.884.95.0144.7914.9325.0775.1994.9165.0485.3144.8094.8644.6918.6233.6653.5093.6333.573.7493.43.3983.7613.7463.7263.7273.7083.8113.7463.7273.7843.8293.6383.8863.8513.9013.7753.9344.1244.014.054.0254.0723.9623.8223.777
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:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value1658000.01654000.01671000.01657000.01659000.01726000.01714000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-30
Value1623000.01618000.01611000.01629000.01617000.01659000.001712000.01661000.01750000.00
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value18-45.511109.89193-25.885.5977.33242814-4.166-6.448-23.137-13.4062.4223.570.622-19.084-2.8935.2575.935-6.5323.201-5.624.299-4.45-2.833.6894.5340.184-0.413-10.8570.7380.1621.4150.8410.8020.5652.5355.716
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax


Other
Period End2021-06-302020-12-312020-09-302020-06-302019-06-30
Value34000.00071000.00
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax100.00.00.0100.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax


Other
Period End2021-06-302020-12-312020-09-302020-06-302019-06-30
Value10000.00021000.00
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax100.00.00.0100.00.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value25-64.6141514132-36.7448.114103440
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7.574-19.1034.534.15139-10.8642.3993.07710125.906-1.749-2.706-9.709-6.3841.7572.590.452
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value3.4963.4563.7023.473.5153.3563.1982.7243.6243.2419.5941.4691.8822.0142.4132.0642.9672.7272.9863.1463.9273.7073.9584.0914.0184.0283.7163.8824.1354.1153.7444.1934.4044.4224.5794.3544.2714.1864.4514.9225.5614.3735.1014.0064.9094.583
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:OtherSignificantNoncashTransactionValueOfConsiderationGiven1

us-gaap:OtherSignificantNoncashTransactionValueOfConsiderationGiven1


Other
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302017-09-302016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-03-312013-12-31
Value595.0130.607200.00.0-3.1590.162-26.317-18.09244231.4780.27-11.2311.808
Percentage of OtherSignificantNoncashTransactionValueOfConsiderationGiven1100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromLoansAndLeases

us-gaap:PaymentsForProceedsFromLoansAndLeases


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
Value-101.3336-55.212-7.81194-4.545-6.37-28.305-42.885-1.83610-2.553-29.082-59.9593.254-33.467-34.326-1.526-11.933-66.598-43.905-61.07-39.478-57.795-53.015-13.805-33.299-50.734-32.783-9.598-43.772-63.502-94.62-72.88-88.764-101.538-98.992-95.748-100.991-94.137-67.512-78.875-72.376-81.667-55.57-89.819
Percentage of PaymentsForProceedsFromLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value62738549074243143823731419821922019415927920217920251
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3983674534637626612813415721062701338680671244710428817816610825441918515921912699442347308646383112781655778495022
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
Value54456159425553735357394933444354344562594833354541303741393453565551755057483419172438343736
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:ProceedsFromRepaymentsOfDebt

us-gaap:ProceedsFromRepaymentsOfDebt


Proceeds
Period End2021-06-302021-03-312020-06-302020-03-31
Value-7.117-5.3853321
Percentage of ProceedsFromRepaymentsOfDebt100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0572.960.00.00.5722.2662.5222.8672.5395.7710.1283.7621.9497.5345.5950.6980.69717121.5288.3431.7170.01.2460.00.2181.32510122.8050.2586.1564.7181.8870.3890.6418.142.9610.3062.9674.0063.8995.0863.697
Percentage of ProceedsFromStockOptionsExercised100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value830000.0942000.0722000.0669000.0643000.0389000.0674000.0645000.0481000.0665000.0565000.0621000.0871000.0785000.0628000.0512000.0410000.0611000.0797000.01693000.0758000.0732000.0614000.0746000.0582000.0548000.0639000.0700000.0577000.0430000.0948000.0730000.0745000.0635000.0762000.0786000.0902000.0767000.01313000.01185000.01453000.0850000.0896000.0950000.0867000.0663000.0
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:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302011-03-312010-03-31
Value0.0070.00.04.30.00.00.00.00.00.02.82.8
Percentage of ProvisionForLoanLossesExpensed100.00.00.0100.00.00.00.00.00.00.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-2.7710.3360.2090.867-0.3570.027-0.206-0.596-1.3460.125-1.506-0.184
Percentage of ProvisionForLoanLossesExpensed0.00.02985.70.00.00.60.00.00.00.00.00.0

us-gaap:CommercialRealEstatePortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.235-0.167-0.0171.03-0.1420.059-0.162-0.0010.1160.031-0.0370.372
Percentage of ProvisionForLoanLossesExpensed0.00.0-242.90.00.01.40.00.00.00.00.00.0

us-gaap:ConsumerPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.523-0.165-0.179-1.8920.6124.1891.7010.6550.3860.7921.014-0.137
Percentage of ProvisionForLoanLossesExpensed0.00.0-2557.10.00.097.40.00.00.00.00.00.0

us-gaap:ResidentialPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.014-0.004-0.005-0.005-0.013-0.004-0.016-0.016-0.023-0.608-0.075-0.12
Percentage of ProvisionForLoanLossesExpensed0.00.0-71.40.00.0-0.10.00.00.00.00.00.0

wabc:ConstructionPortfolioSegment


Provision
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.001-0.0010.0-0.10.029-1.490.4820.264-0.6121.2110.044
Percentage of ProvisionForLoanLossesExpensed0.0-14.30.00.00.70.00.00.00.00.00.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.6173.3011.244.8181.6390.00.00.53.643190.00.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.00.00.0100.0100.0100.00.00.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value15000.056000.015000.019000.045000.021000.025000.015000.048000.017000.025000.022000.053000.024000.028000.022000.039000.015000.015000.015000.045000.015000.016000.020000.024000.045000.014000.019000.017000.052000.023000.023000.019000.042000.019000.011000.018000.045000.014000.017000.018000.040000.024000.024000.028000.049000.0
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value15000.056000.015000.019000.045000.021000.025000.015000.048000.017000.025000.022000.053000.024000.028000.022000.039000.015000.015000.015000.045000.015000.016000.020000.024000.045000.014000.019000.017000.052000.023000.023000.019000.042000.019000.011000.018000.045000.014000.017000.018000.040000.024000.024000.0
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesIssuedForServices us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesIssuedForServices

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value1000.001000.01000.001000.001000.01000.0
Percentage of StockIssuedDuringPeriodSharesIssuedForServices100.00.0100.0100.00.0100.00.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302011-12-312011-09-302010-12-312010-09-30
Value09000.000010000.00018000.00020000.000000002000.000000000
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures0.0100.00.00.00.0100.00.00.0100.00.00.0100.00.00.00.00.00.00.00.0100.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1000.052000.0-1000.0013000.040000.047000.052000.050000.0120000.03000.077000.046000.0166000.0106000.014000.013000.0376000.0241000.033000.0185000.040000.0027000.004000.027000.0225000.0258000.064000.06000.0151000.0116000.044000.010000.015000.0210000.076000.06000.068000.0101000.095000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302011-12-312011-09-302010-12-312010-09-30
Value0526000.0000534000.0001073000.0001143000.0000000087000.000000000
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures0.0100.00.00.00.0100.00.00.0100.00.00.0100.00.00.00.00.00.00.00.0100.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value0526000.000736000.0534000.0001073000.0624000.00138000.01143000.00000753000.01045000.00133000.0087000.00000262000.0220000.00000
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures0.0100.00.00.00.0100.00.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DeferredCompensationShareBasedPayments


Stock
Period End2020-12-312020-09-302020-06-302019-12-312019-09-30
Value00-736000.000
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures0.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value408000.0368000.0375000.0450000.0525000.0525000.0260000.0402000.0541000.0541000.0413000.0525000.0525000.0525000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensationGross us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value408000.0368000.0375000.0450000.0525000.0525000.0260000.0402000.0541000.0541000.0413000.0525000.0525000.0525000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensationGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0572.960.00.00.5722.2662.5222.8672.5395.7710.1283.7621.9497.5345.5950.6980.69717121.5288.3431.7170.01.2460.00.2181.32510122.8050.2586.1564.7181.8870.3890.6418.142.9610.3062.9674.0063.8995.0863.697
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.0572.960.00.00.5722.2662.5222.8672.5395.7710.1283.7621.9497.5345.5950.6980.69717121.5288.3431.7170.01.2460.00.2181.32510122.8050.2586.1564.7181.8870.3890.6418.142.9610.3062.9674.0063.899
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockOptionPlanExpense

us-gaap:StockOptionPlanExpense


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value408000.0368000.0375000.0450000.0525000.0525000.0260000.0402000.0541000.0541000.0413000.0525000.0525000.0525000.0456000.0456000.0456000.0456000.0352000.0390000.0362000.0390000.0285000.0315000.0318000.0354000.0309000.0309000.0341000.0359000.0316000.0351000.0351000.0379000.0270000.0375000.0370000.0435000.0345000.0360000.0360000.0360000.0320000.0340000.0360000.0360000.0
Percentage of StockOptionPlanExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodShares

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value04000.091000.035000.013000.0180000.0008000.018000.009000.000007000.0130000.0-686000.026000.0133000.0183000.0161000.0175000.0271000.0437000.0326000.0256000.0270000.0347000.0299000.01402000.0-317000.0-249000.0-361000.0-316000.0-401000.0-239000.0-129000.0-96000.0
Percentage of StockRepurchasedAndRetiredDuringPeriodShares0.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.00.2324.7621.8680.6199.2470.00.00.4881.0480.00.5240.00.00.00.00.3565.4240.0641.3385.8237.8677.8688.4551322171211151212141115131912-50.9685.029124.804
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.00.0661.5850.6190.2283.1050.00.00.1360.2980.00.1490.00.00.00.00.1081.9510.0230.3951.9632.7082.3862.5693.9916.3514.6653.5883.7674.8194.0963.6824.1563.374.8684.1955.0053.1371.6751.25
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.028.433.333.136.833.60.00.027.928.40.028.40.00.00.00.030.336.035.929.533.734.430.330.429.228.026.628.931.531.232.029.228.828.931.531.425.526.1-3.324.9

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.00.1663.1771.2490.3916.1420.00.00.3520.750.00.3750.00.00.00.00.2483.4730.0410.9433.865.1595.4825.8869.65416128.8088.184108.7178.923108.29109.183148.902-39.1373.7799.7033.689
Percentage of StockRepurchasedAndRetiredDuringPeriodValue0.071.666.766.963.266.40.00.072.171.60.071.60.00.00.00.069.764.064.170.566.365.669.769.670.872.073.471.168.568.868.070.871.271.168.568.674.573.976.875.178.176.8

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value22000.021000.016000.016000.071000.041000.045000.071000.0114000.098000.0133000.095000.0103000.0158000.046000.044000.023000.035000.022000.04000.043000.063000.0104000.035000.08000.012000.052000.046000.060000.065000.0152000.0204000.0258000.0361000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wabc:ContractCourierExpense

wabc:ContractCourierExpense


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value567000.0504000.0502000.0500000.0508000.0491000.0529000.0456000.0451000.0442000.0446000.0448000.0422000.0463000.0422000.0451000.0438000.0421000.0494000.0451000.0462000.0545000.0585000.0604000.0598000.0543000.0686000.0663000.0665000.0610000.0664000.0725000.0737000.0741000.0767000.0772000.0793000.0785000.0807000.0840000.0852000.0843000.0859000.0826000.0903000.0907000.0
Percentage of ContractCourierExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wabc:DebtSecuritiesHeldtomaturityAllowanceForCreditLossIncreaseDecreaseFromAdoptionOfAccountingPolicies

wabc:DebtSecuritiesHeldtomaturityAllowanceForCreditLossIncreaseDecreaseFromAdoptionOfAccountingPolicies


Debt
Period End2020-12-31
Value0
Percentage of DebtSecuritiesHeldtomaturityAllowanceForCreditLossIncreaseDecreaseFromAdoptionOfAccountingPolicies0.0

wabc:FairValueInputsAppraisalRate us-gaap:FairValueByFairValueHierarchyLevel

wabc:FairValueInputsAppraisalRate

us-gaap:FairValueInputsLevel3


Fair
Period End2021-06-302021-03-312020-12-31
Value010.00
Percentage of FairValueInputsAppraisalRate0.0100.00.0

wabc:InterestAndDividendIncomeEquitySecuritiesOperating

wabc:InterestAndDividendIncomeEquitySecuritiesOperating


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
Value110000.0110000.0110000.0103000.0103000.0103000.0103000.092000.099000.098000.098000.085000.086000.085000.079000.070000.070000.074000.0
Percentage of InterestAndDividendIncomeEquitySecuritiesOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

wabc:TroubledDebtRestructuringsDuringPeriod

wabc:TroubledDebtRestructuringsDuringPeriod


Troubled
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value00000000000000-3.01.01.0001.03.03.01.01.05.003.01.01.01.003.01.01.001.01.02.01.0
Percentage of TroubledDebtRestructuringsDuringPeriod0.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent us-gaap:ConsolidatedEntities

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent

srt:ParentCompany


Accounts
Period End2020-12-312019-12-312018-12-312017-12-31
Value29000.033000.046000.092000.0
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedParties us-gaap:ConsolidatedEntities

us-gaap:AccountsReceivableRelatedParties

srt:ParentCompany


Accounts
Period End2020-12-312019-12-312018-12-312017-12-31
Value257000.0231000.0580000.0538000.0
Percentage of AccountsReceivableRelatedParties100.0100.0100.0100.0

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

us-gaap:AssetsFairValueDisclosure

wabc:OtherRealEstateOwned, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0430.0430.0430.0430.0430.0430.0430.350.620.9391.3761.426
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

wabc:ImpairedLoans, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:CommercialPortfolioSegment


Assets
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
Value5.1865.275.3545.4015.6415.7476.056.0266.3426.4374.8154.7764.8574.95
Percentage of AssetsFairValueDisclosure0.00.012451.212560.513118.613365.114069.814014.014748.81839.1776.6508.6353.0347.1

wabc:ImpairedLoans, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:CommercialRealEstatePortfolioSegment


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.4093.413.713.7733.7733.7734.0914.0994.14.13.875.4485.7076.685.904
Percentage of AssetsFairValueDisclosure0.00.00.08774.48774.48774.49514.09532.69534.99534.91105.7878.7607.8485.5414.0

wabc:ImpairedLoans, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:ResidentialPortfolioSegment


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.1750.1770.1810.1830.1860.1880.190.1930.1950.197
Percentage of AssetsFairValueDisclosure0.00.00.0425.6432.6437.2441.9448.8453.5458.1

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency

wabc:OtherRealEstateOwned, us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0430.0430.0430.0430.0430.0430.0430.350.620.9391.3761.426
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancingReceivablePortfolioSegment

wabc:ImpairedLoans, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:CommercialPortfolioSegment


Assets
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
Value5.1865.275.3545.4015.6415.7476.056.0266.3426.4374.8154.7764.8574.95
Percentage of AssetsFairValueDisclosure0.00.012451.212560.513118.613365.114069.814014.014748.81839.1776.6508.6353.0347.1

wabc:ImpairedLoans, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:CommercialRealEstatePortfolioSegment


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.4093.413.713.7733.7733.7734.0914.0994.14.13.875.4485.7076.685.904
Percentage of AssetsFairValueDisclosure0.00.00.08774.48774.48774.49514.09532.69534.99534.91105.7878.7607.8485.5414.0

wabc:ImpairedLoans, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:ResidentialPortfolioSegment


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.1750.1770.1810.1830.1860.1880.190.1930.1950.197
Percentage of AssetsFairValueDisclosure0.00.00.0425.6432.6437.2441.9448.8453.5458.1

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

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.5848.7739.1619.3539.4039.645101010101010111212
Percentage of AssetsFairValueDisclosure0.00.00.021751.221867.422430.223420.924330.224281.425020.93044.91755.31216.4938.4861.2

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.5848.7739.1619.3539.4039.645101010101010111212
Percentage of AssetsFairValueDisclosure0.00.00.021751.221867.422430.223420.924330.224281.425020.93044.91755.31216.4938.4861.2

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value12610516314813456433829133.5972.4973.4283.9355.424
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

us-gaap:CollateralizedDebtObligations


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value2.2462.5964.4333.0530.7380.007
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax1.82.52.72.10.50.0

us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Available
Period End2020-12-312020-09-302020-06-30
Value0.0070.0290.045
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.00.00.0

us-gaap:DomesticCorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value10179131114100252924176.8811.0750.4110.6130.5231.104
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax80.475.380.177.474.445.566.563.159.551.229.916.517.913.320.4

us-gaap:USStatesAndPoliticalSubdivisions


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value4.494.315.3325.2234.9323.1373.6563.9443.4862.8171.8561.8412.4662.913.796
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax3.64.13.33.53.75.68.310.211.921.051.673.771.974.070.0

wabc:AgencyResidentialMBS


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value17192225282710108.2363.5990.5950.2430.3480.50.522
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax14.318.113.917.021.448.925.126.528.126.816.59.710.212.79.6

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.7957.7581.1420.9461.415556.8719.81610296079746534
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

us-gaap:CollateralizedDebtObligations


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value0.821.2111.0980.6540.052-0.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax29.315.696.169.13.7-0.0

us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Available
Period End2020-12-312020-09-302020-06-30
Value-0.00.0750.205
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax-0.07.914.5

us-gaap:DomesticCorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.9736.5360.0420.1991.11550.8792.9912.1198.39232728249.277
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax70.684.23.721.078.499.612.830.519.828.539.235.138.237.927.1

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.001-0.0-0.00.0090.0090.0070.010.0090.0130.0080.0060.022
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.0-0.0-0.00.10.10.10.00.00.00.00.00.1

us-gaap:USStatesAndPoliticalSubdivisions


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0020.010.0010.0020.0380.1960.0440.0470.10.7112.9854.3493.643.6611.482
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.10.10.10.22.70.40.60.50.92.44.95.54.95.64.3

wabc:AgencyCommercialMBS


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0160.0090.0080.003-0.00.0190.0230.0270.030.0410.0390.025
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax1.70.60.00.0-0.00.20.10.00.00.10.10.1

wabc:AgencyResidentialMBS


Available
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0010.0010.0075.8386.6098.314183041373220
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.10.10.085.067.377.563.650.452.550.349.859.8

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value418038923900383635753210304129542757271827112555243424132220
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument

wabc:IndustrialAndEnergySectors, us-gaap:CorporateDebtSecurities


Available
Period End2020-12-31
Value275
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis7.1

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

us-gaap:CollateralizedDebtObligations


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1090115611526671426.748
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis26.129.729.617.44.00.2

us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Available
Period End2020-12-312020-09-302020-06-30
Value24224299
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.65.98.4

us-gaap:DomesticCorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value249720761986209821702112180516451379132313371282122812261123
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis59.753.350.954.760.765.859.455.750.048.749.350.250.550.850.6

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.1370.1460.1540.1630.1710.5210.5530.7860.8151.0911.1281.2231.4411.5261.612
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.00.00.00.00.00.00.00.00.00.00.00.10.10.1

us-gaap:USStatesAndPoliticalSubdivisions


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value100101105121147153159161172169180182184181182
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis2.42.62.73.24.14.85.25.56.26.36.67.27.67.58.2

wabc:AgencyCommercialMBS


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.6013.6383.6743.7113.7485.6351.861.8691.8772.2192.2292.244
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.10.10.10.10.10.20.10.10.10.10.10.1

wabc:AgencyResidentialMBS


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value492558630720811883934976987945883919894879787
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis11.814.316.218.822.727.530.733.035.834.832.636.036.736.535.5

wabc:CorporateDebtSecuritiesInIndustrialAndEnergySectors


Available
Period End2020-09-302020-06-30
Value275275
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis7.27.7

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value21851829176714801142984670471193948511118022515921923822623830133525716612915540958436214584666571705961556863606264
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value22411861185115441190939683478199968511017922316022124122823930834426517313415941658936614886686672746365587065626364
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value78585192297310621057110411821329135714381355119210981031861760687750745808983104910661095973629625723726536497426371309322321253242275304315
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value829894974102611161074112211991342135414141323116210751023860758683745750813984104410681094976630629727728538499425375312325321253241275305314
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value433431368207263033353838383839424645474747351.1812.0732.47527424758678082879098103110112124126133138146130
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value435432370209283134373938363637404544454444341.3752.3242.749294551637285869094103111120122133134140144147124
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value37933413341032352864229521352000178317701798159815031502142113361259115711831253133213791357
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value36883334327031132760232321031974176417711825163415371531143013351259116111911241131713701355
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value283222212452528250294284202280262128124164193208212200154159172126136111998057452235758269794042593737361421
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value286224213454529250295285202280261128123162193208213200154160172126136112998057452335758269804042593737361421
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value492558630723814887938979992947885921896882790210220233245257269282292302313328317276172120129138149159135
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value510577652748843914943983992931855880859849770205217227243251260273282290304323322282177127136146158165140
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value430439904063398337083210307829832775270226542478236323512191
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancialInstrument

wabc:IndustrialAndEnergySectors, us-gaap:CorporateDebtSecurities


Available
Period End2020-12-31
Value291
Percentage of AvailableForSaleSecuritiesDebtSecurities7.2

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:ExternalCreditRatingByGrouping, us-gaap:FinancialInstrument

us-gaap:ExternalCreditRatingNonInvestmentGrade, us-gaap:DomesticCorporateDebtSecurities


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
Value14141414141414131414131413
Percentage of AvailableForSaleSecuritiesDebtSecurities0.30.40.40.40.40.40.50.50.50.50.50.60.6

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

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value430439904063398337083210305829382731259325152478236323512191
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.099.498.598.496.094.7100.0100.0100.0100.0

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

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CollateralizedLoanObligations


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value109211571156670143566.755
Percentage of AvailableForSaleSecuritiesDebtSecurities25.429.028.516.83.91.80.2

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Available
Period End2020-12-312020-09-302020-06-30
Value24224299
Percentage of AvailableForSaleSecuritiesDebtSecurities0.65.68.1

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:DomesticCorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value259621492117221222692081183316671395132213151255120112011115
Percentage of AvailableForSaleSecuritiesDebtSecurities60.353.952.155.561.264.859.655.950.348.949.550.750.851.150.9

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.1370.1450.1540.1630.1710.5210.5440.7770.8081.0811.1191.211.4331.521.59
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.10.10.1

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USStatesAndPoliticalSubdivisions


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value104106111127152156163165175172179180183180185
Percentage of AvailableForSaleSecuritiesDebtSecurities2.42.72.73.24.14.95.35.56.36.46.77.37.87.78.5

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, wabc:AgencyCommercialMBS


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.5853.6293.6663.7083.7515.6211.8371.8421.8472.1782.192.219
Percentage of AvailableForSaleSecuritiesDebtSecurities0.10.10.10.10.10.20.10.10.10.10.10.1

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, wabc:AgencyResidentialMBS


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value510577652745840911939979986930853878857847767
Percentage of AvailableForSaleSecuritiesDebtSecurities11.914.516.118.722.728.430.532.835.634.432.235.436.336.035.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value430439904063398337083210307829832775270226542478236323512191
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:FairValueMeasurementsRecurring, us-gaap:CollateralizedLoanObligations


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value109211571156670143566.755
Percentage of AvailableForSaleSecuritiesDebtSecurities25.429.028.516.83.91.80.2

us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Available
Period End2020-12-312020-09-302020-06-30
Value24224299
Percentage of AvailableForSaleSecuritiesDebtSecurities0.65.68.1

us-gaap:FairValueMeasurementsRecurring, us-gaap:DomesticCorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value259621492117221222692081183316671395132213151255120112011115
Percentage of AvailableForSaleSecuritiesDebtSecurities60.353.952.155.561.264.859.655.950.348.949.550.750.851.150.9

us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.1370.1450.1540.1630.1710.5210.5440.7770.8081.0811.1191.211.4331.521.59
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.10.10.1

us-gaap:FairValueMeasurementsRecurring, us-gaap:USStatesAndPoliticalSubdivisions


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value104106111127152156163165175172179180183180185
Percentage of AvailableForSaleSecuritiesDebtSecurities2.42.72.73.24.14.95.35.56.36.46.77.37.87.78.5

us-gaap:FairValueMeasurementsRecurring, wabc:AgencyCommercialMBS


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.5853.6293.6663.7083.7515.6211.8371.8421.8472.1782.192.219
Percentage of AvailableForSaleSecuritiesDebtSecurities0.10.10.10.10.10.20.10.10.10.10.10.1

us-gaap:FairValueMeasurementsRecurring, wabc:AgencyResidentialMBS


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value510577652745840911939979986930853878857847767
Percentage of AvailableForSaleSecuritiesDebtSecurities11.914.516.118.722.728.430.532.835.634.432.235.436.336.035.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

us-gaap:CollateralizedDebtObligations


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1092115711566701436.755
Percentage of AvailableForSaleSecuritiesDebtSecurities25.429.028.516.83.90.2

us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Available
Period End2020-12-312020-09-302020-06-30
Value24224299
Percentage of AvailableForSaleSecuritiesDebtSecurities0.65.68.1

us-gaap:DomesticCorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value259621492117221222692081183316671395132213151255120112011115
Percentage of AvailableForSaleSecuritiesDebtSecurities60.353.952.155.561.264.859.655.950.348.949.550.750.851.150.9

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.1370.1450.1540.1630.1710.5210.5440.7770.8081.0811.1191.211.4331.521.59
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.00.00.00.00.00.00.00.00.10.10.1

us-gaap:USStatesAndPoliticalSubdivisions


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value104106111127152156163165175172179180183180185
Percentage of AvailableForSaleSecuritiesDebtSecurities2.42.72.73.24.14.95.35.56.36.46.77.37.87.78.5

wabc:AgencyCommercialMBS


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.5853.6293.6663.7083.7515.6211.8371.8421.8472.1782.192.219
Percentage of AvailableForSaleSecuritiesDebtSecurities0.10.10.10.10.10.20.10.10.10.10.10.1

wabc:AgencyResidentialMBS


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value510577652745840911939979986930853878857847767
Percentage of AvailableForSaleSecuritiesDebtSecurities11.914.516.118.722.728.430.532.835.634.432.235.436.336.035.0

wabc:CorporateDebtSecuritiesInIndustrialAndEnergySectors


Available
Period End2020-09-302020-06-30
Value288287
Percentage of AvailableForSaleSecuritiesDebtSecurities7.27.8

us-gaap:BankOwnedLifeInsurance

us-gaap:BankOwnedLifeInsurance


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value616160595958575756565655555454535252515050494848474746454444434546454542
Percentage of BankOwnedLifeInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Capital

us-gaap:Capital


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value628600551504476420
Percentage of Capital100.0100.0100.0100.0100.0100.0

us-gaap:Capital dei:LegalEntity

wabc:WestamericaBank


Capitaldei:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value514443445415383361391406418424438
Percentage of Capital81.873.880.782.380.586.00.00.00.00.00.0

us-gaap:CapitalRequiredForCapitalAdequacy

us-gaap:CapitalRequiredForCapitalAdequacy


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value395374319288257251
Percentage of CapitalRequiredForCapitalAdequacy100.0100.0100.0100.0100.0100.0

us-gaap:CapitalRequiredForCapitalAdequacy dei:LegalEntity

wabc:WestamericaBank


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value391370315284254247232217214221229
Percentage of CapitalRequiredForCapitalAdequacy98.898.798.698.498.698.60.00.00.00.00.0

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value10.50.1050.098750.09250.086250.08
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0100.0100.0100.0100.0100.0

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets dei:LegalEntity

wabc:WestamericaBank


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value10.50.1050.098750.09250.086250.080.080.080.080.080.08
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0100.0100.0100.0100.0100.00.00.00.00.00.0

us-gaap:CapitalRequiredToBeWellCapitalized dei:LegalEntity

us-gaap:CapitalRequiredToBeWellCapitalized

wabc:WestamericaBank


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value372352319307294309290272268276286
Percentage of CapitalRequiredToBeWellCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets dei:LegalEntity

us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

wabc:WestamericaBank


Capital
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value10.00.10.10.10.10.10.10.10.10.10.1
Percentage of CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned

us-gaap:CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned


Carrying
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value239239255260268242264245247225224223226241237240237227227198151152157169150148
Percentage of CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned us-gaap:FinancialInstrument

us-gaap:CorporateDebtSecurities


Carrying
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value18718118818318215014611511492919191104105
Percentage of CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned78.275.573.770.567.962.255.346.846.341.241.041.040.643.144.3

wabc:AgencyResidentialMBS


Carrying
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value525867768691525556575859616458
Percentage of CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned21.824.526.329.532.137.819.822.423.025.726.126.527.226.624.5

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

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value939866621398500304373415418421420522629555575561529462
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value939866621398500304373415418421420522629555575561529546462471441471433268289247380524484428472388384491
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value939866621398500304373415418421420522629555575561529546462471441471433268289247380524484428472388384491
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CashAndDueFromBanks

us-gaap:CashAndDueFromBanks


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value939866621398500304373415418421420522629555575561529546462471441471433268289247380524484428472388384355491367320541530459320348338344294253361138209
Percentage of CashAndDueFromBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value939866621398500304373415418420575
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonEquityTierOneCapital

us-gaap:CommonEquityTierOneCapital


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value604579528479443
Percentage of CommonEquityTierOneCapital100.0100.0100.0100.0100.0

us-gaap:CommonEquityTierOneCapital dei:LegalEntity

wabc:WestamericaBank


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value484415415383344
Percentage of CommonEquityTierOneCapital80.171.878.780.177.7

us-gaap:CommonEquityTierOneCapitalRatio

us-gaap:CommonEquityTierOneCapitalRatio


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value16.040.16220.1630.15360.1485
Percentage of CommonEquityTierOneCapitalRatio100.0100.0100.0100.0100.0

us-gaap:CommonEquityTierOneCapitalRatio dei:LegalEntity

wabc:WestamericaBank


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value13.00.1180.13010.1250.117
Percentage of CommonEquityTierOneCapitalRatio81.072.779.881.478.8

us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy

us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value263249206179153
Percentage of CommonEquityTierOneCapitalRequiredForCapitalAdequacy100.0100.0100.0100.0100.0

us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy dei:LegalEntity

wabc:WestamericaBank


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value260246203176150
Percentage of CommonEquityTierOneCapitalRequiredForCapitalAdequacy98.898.798.698.498.6

us-gaap:CommonEquityTierOneCapitalRequiredToBeWellCapitalized dei:LegalEntity

us-gaap:CommonEquityTierOneCapitalRequiredToBeWellCapitalized

wabc:WestamericaBank


Common
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value242229207199191
Percentage of CommonEquityTierOneCapitalRequiredToBeWellCapitalized100.0100.0100.0100.0100.0

us-gaap:CostMethodInvestments

us-gaap:CostMethodInvestments


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value141414141414141414141414141414141414141414141414141415151515181920212123
Percentage of CostMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAndHeldToMaturity

us-gaap:DebtSecuritiesAvailableForSaleAndHeldToMaturity


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value472844714592457743643906382337833648362236263481342134503347
Percentage of DebtSecuritiesAvailableForSaleAndHeldToMaturity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value15141418224146262890016551549966931918970
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger us-gaap:FinancialInstrument

us-gaap:DomesticCorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value14141418203764166275832722333291258282
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger99.099.999.999.989.189.413.926.530.650.346.734.531.328.229.2

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-06-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.1370.00.5440.7770.8081.0811.1191.211.4331.521.59
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger0.90.00.10.10.10.10.10.10.20.20.2

wabc:AgencyResidentialMBS


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0120.0150.0170.0210.3370.363347400533645640447469492516
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger0.10.10.10.11.50.975.163.759.339.041.346.350.353.653.2

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0560.0210.0420.1990.40.9396.5578.52810295652474228
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:DomesticCorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0560.0210.0420.1990.3610.8020.7171.7952.0528.3620119.9528.3435.23
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0100.0100.090.285.410.921.019.228.536.021.820.819.818.4

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3765722693222261102961691122499132611821097834
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months us-gaap:FinancialInstrument

us-gaap:CollateralizedDebtObligations


Debt
Period End2020-12-31
Value268
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months99.7

us-gaap:CollateralizedLoanObligations


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value254359268216289.973
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months67.562.799.767.112.70.9

us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Debt
Period End2020-09-302020-06-30
Value99149
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months31.066.0

us-gaap:DomesticCorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value120210441082711461017308826794781571
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months32.136.819.798.273.986.091.076.561.762.367.271.268.5

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-31
Value0.1450.1540.1630.1710.00.00.00.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months0.00.10.10.10.00.00.00.0

us-gaap:USStatesAndPoliticalSubdivisions


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.4292.420.6922.4470.06.6270.00.01.0545.2152632323121
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months0.40.40.30.80.00.60.00.09.022.85.32.42.82.82.6

wabc:AgencyCommercialMBS


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-06-302018-12-312018-06-302018-03-312017-12-31
Value3.5853.6293.6663.7080.01.8420.3232.192.219
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months1.11.60.33.80.00.40.00.20.3

wabc:AgencyResidentialMBS


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0850.0950.0960.0980.00.0113.750.00.176107421353280238
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months0.00.00.00.00.00.012.02.20.00.821.531.829.925.628.6

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.7397.7371.10.7471.015540.3141.2880.0670.0454.1112726235.803
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:CollateralizedDebtObligations


Debt
Period End2020-12-31
Value1.098
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss99.8

us-gaap:CollateralizedLoanObligations


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.821.2111.0980.6540.0520.027
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss29.915.799.887.65.10.0

us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Debt
Period End2020-09-302020-06-30
Value0.0750.205
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss10.020.2

us-gaap:DomesticCorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.9176.5150.749540.1621.1960.0670.033.4031618164.047
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss70.084.273.899.851.692.9100.066.782.860.669.870.769.7

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-03-312020-06-302019-12-312019-09-302019-06-302018-12-31
Value0.001-0.0-0.0-0.0-0.0-0.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.0-0.0-0.0-0.0-0.0-0.0

us-gaap:USStatesAndPoliticalSubdivisions


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0020.010.0010.002-0.00.066-0.0-0.0-0.00.0150.1660.3920.5880.6360.228
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.10.10.10.3-0.00.1-0.0-0.0-0.033.34.01.42.22.73.9

wabc:AgencyCommercialMBS


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-06-302018-12-312018-06-302018-03-312017-12-31
Value0.0160.0090.0080.003-0.00.0270.010.0390.025
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss2.10.90.01.0-0.00.70.00.20.4

wabc:AgencyResidentialMBS


Debt
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.001-0.0-0.00.10.062-0.00.5079.8167.3246.1631.501
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.1-0.0-0.031.84.8-0.012.336.327.826.325.9

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3915872843402491144559798912167820482293211420161804
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition us-gaap:FinancialInstrument

us-gaap:CollateralizedDebtObligations


Debt
Period End2020-12-31
Value268
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition94.4

us-gaap:CollateralizedLoanObligations


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value254359268216289.973
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition64.961.194.463.511.50.9

us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Debt
Period End2020-09-302020-06-30
Value99149
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition29.359.9

us-gaap:DomesticCorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value13522514186411201353122868501030115910851040854
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition34.738.45.35.426.097.824.339.231.450.650.350.651.451.647.3

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.1370.1450.1540.1630.1710.5440.7770.8081.0811.1191.211.4331.521.59
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition0.00.00.10.00.10.10.10.10.10.10.10.10.10.1

us-gaap:USStatesAndPoliticalSubdivisions


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.4292.420.6922.4472.169104.1634.69211599399858173
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition0.40.40.20.70.90.90.70.61.33.54.64.44.04.04.1

wabc:AgencyCommercialMBS


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3.5853.6293.6663.7081.8331.8371.8421.8472.1782.192.219
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition1.11.50.30.70.20.10.10.10.10.10.1

wabc:AgencyResidentialMBS


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0970.110.1130.1190.3370.363359404533645747869822773755
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition0.00.00.00.00.10.064.250.758.538.536.537.938.938.441.8

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2.7957.7581.1420.9461.415556.8719.81610296079746534
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:CollateralizedDebtObligations


Debt
Period End2020-12-31
Value1.098
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss96.1

us-gaap:CollateralizedLoanObligations


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.821.2111.0980.6540.0520.027
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss29.315.696.169.13.70.0

us-gaap:CommercialPaperNotIncludedWithCashAndCashEquivalents


Debt
Period End2020-09-302020-06-30
Value0.0750.205
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss7.914.5

us-gaap:DomesticCorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1.9736.5360.0420.1991.11550.8792.9912.1198.39232728249.277
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss70.684.23.721.078.499.612.830.519.828.539.235.138.237.927.1

us-gaap:USGovernmentAgenciesDebtSecurities


Debt
Period End2021-03-312020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.001-0.00.0090.0090.0070.010.0090.0130.0080.0060.022
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.0-0.00.10.10.10.00.00.00.00.00.1

us-gaap:USStatesAndPoliticalSubdivisions


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0020.010.0010.0020.0380.1960.0440.0470.10.7112.9854.3493.643.6611.482
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.10.10.10.22.70.40.60.50.92.44.95.54.95.64.3

wabc:AgencyCommercialMBS


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0160.0090.0080.0030.0190.0230.0270.030.0410.0390.025
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss1.70.60.00.00.20.10.00.00.10.10.1

wabc:AgencyResidentialMBS


Debt
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0010.0010.0075.8386.6098.314183041373220
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.10.10.085.067.377.563.650.452.550.349.859.8

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value9000.09000.09000.016000.016000.016000.00
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLoss100.0100.0100.0100.0100.0100.00.0

us-gaap:DebtSecuritiesHeldToMaturityAllowanceForCreditLoss us-gaap:CumulativeEffectPeriodOfAdoption

srt:CumulativeEffectPeriodOfAdoptionAdjustedBalance


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value9000.016000.016000.016000.016000.0
Percentage of DebtSecuritiesHeldToMaturityAllowanceForCreditLoss100.0100.0100.0100.00.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value48111.0521.6183.4295.421011213835
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName

us-gaap:DeferredTaxAssetsCapitalLossCarryforwards

us-gaap:StateAndLocalJurisdiction, us-gaap:CaliforniaFranchiseTaxBoard


Deferred
Period End2020-12-312019-12-312018-12-31
Value2429000.02875000.03070000.0
Percentage of DeferredTaxAssetsCapitalLossCarryforwards100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value222343576164637583
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2262000.01948000.03026000.01871000.02679000.02612000.02867000.03249000.04162000.04584000.04686000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value800000.0377000.0721000.0520000.0724000.0397000.0730000.0654000.064000.0587000.01566000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value585000.0261000.031000.0299000.0577000.0205000.0538000.0690000.0444000.0242000.0
Percentage of DeferredTaxAssetsPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2353000.01875000.02104000.02066000.03399000.03772000.04692000.05321000.05648000.01141000.01141000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4.7895.1185.2295.2798.0438.0827.8397.9918.2781213
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value480000.0517000.0555000.0526000.0903000.01072000.01097000.01059000.01210000.01236000.01354000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value416000.01606000.02554000.01609000.0967000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value6.7896.3266.8687.34911131414131415
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value2.4292.8753.073.05618191820202121
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpense

us-gaap:DeferredTaxLiabilitiesDeferredExpense


Deferred
Period End2020-12-31
Value48
Percentage of DeferredTaxLiabilitiesDeferredExpense100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value106000.0239000.0291000.0281000.0346000.0456000.0461000.0383000.0429000.0500000.0402000.0
Percentage of DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value0.4560.6730.7611.2472.9554.2945.777.4089.2191113
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestments

us-gaap:DeferredTaxLiabilitiesInvestments


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-31
Value36284843100.0
Percentage of DeferredTaxLiabilitiesInvestments100.0100.0100.0100.0100.00.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1.80.0290.03760.0370.0410.0430.0380.0480.040.0460.0550.055
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation

us-gaap:DefinedBenefitPlanBenefitObligation


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1654000.01782000.01913000.01958000.02319000.02522000.02782000.02544000.02755000.03117000.03178000.03519000.03813000.0
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:CounterpartyName

wabc:Retirees


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1654000.01782000.01913000.01575000.01705000.01695000.0
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.080.473.567.2

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter


Defined
Period End2020-12-31
Value589000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths


Defined
Period End2020-12-31
Value153000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive


Defined
Period End2020-12-31
Value146000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour


Defined
Period End2020-12-31
Value151000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree


Defined
Period End2020-12-31
Value153000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo


Defined
Period End2020-12-31
Value153000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:DefinedBenefitPlanFundedStatusOfPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value-1654000.0-1782000.0-1913000.0-1958000.0-2319000.0-2522000.0-2782000.0-2544000.0-2755000.0-3117000.0-3178000.0-3519000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear


Defined
Period End2020-12-31
Value0
Percentage of DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear0.0

us-gaap:DemandDepositAccounts

us-gaap:DemandDepositAccounts


Demand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value1200117911021040997936931910942941929909939924904873885905865851827855860812795787792775756771763737725771748745742748734718
Percentage of DemandDepositAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Deposits

us-gaap:Deposits


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value60765923568755395468479948124796473047924866483548874867482747344682469747044644448545164540436643544380434943214213421441634108410141614232413042084249424941924088414041324060
Percentage of Deposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DepositsFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value592257695531537753054634464346214548460346714630467146434595449244364448
Percentage of DepositsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value153154156161163165167173178185191201212221228239244254
Percentage of DepositsFairValueDisclosure2.62.72.83.03.13.63.63.83.94.04.14.34.54.85.05.35.55.7

us-gaap:DepositsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value6076592356875539546847994812479647304792486648354887486748274734468246974704464444854516454043664354438043494321421342144163410841014232
Percentage of DepositsFairValueDisclosure102.6102.7102.8103.0103.1103.6103.6103.8104.0104.1104.2104.4104.6104.8105.0105.4105.60.0105.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value6076592356885539546847994810479447274788486248324883486448244731468046954702464344844515453943654354437943484319421142134162410741004232
Percentage of DepositsFairValueDisclosure102.6102.7102.8103.0103.1103.6103.6103.8103.9104.0104.1104.3104.5104.8105.0105.3105.50.0105.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DepositsSavingsDeposits

us-gaap:DepositsSavingsDeposits


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value1849179117031653160515141471144514421482149815101526154014941491147014941493146214041393136613101287131312601231119812071167115011391160116511331136114311481063
Percentage of DepositsSavingsDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions


Employee
Period End2020-12-31
Value2587000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0

us-gaap:FederalReserveBankStock

us-gaap:FederalReserveBankStock


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value141414141414141414141414141414141414141414141414141414141414141414141414
Percentage of FederalReserveBankStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLosses

us-gaap:FinancingReceivableAllowanceForCreditLosses


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value23232324242419192020212223232323242425262829293030313434353434343333323334343535353738
Percentage of FinancingReceivableAllowanceForCreditLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLosses us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value6.8589.5549.2058.9858.0728.3364.9594.8725.2356.5066.3117.818.2758.5177.7467.7728.1678.5938.3278.411109.8479.5595.46
Percentage of FinancingReceivableAllowanceForCreditLosses28.940.738.637.232.933.625.524.626.031.829.635.535.936.933.732.933.934.532.131.936.033.432.116.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value6.7525.5055.665.6654.6234.7534.0644.0684.0573.9273.8843.9213.7893.8243.8493.8333.5453.5223.333.5993.9124.2374.2124.245
Percentage of FinancingReceivableAllowanceForCreditLosses28.423.423.723.518.819.220.920.520.219.218.217.816.416.616.716.214.714.112.813.713.514.414.112.4

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value108.3758.9369.43311116.4455.5395.4185.4815.6455.3145.9435.7396.4186.9117.2156.9847.987.9177.6517.5768.0019.827
Percentage of FinancingReceivableAllowanceForCreditLosses42.435.737.539.148.046.533.127.926.926.826.424.125.824.927.929.229.928.030.730.026.525.726.928.8

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0.0570.0430.0470.0520.0570.070.2060.2220.2380.2610.8690.9441.0640.9080.9951.0551.1051.2141.331.4431.6361.7071.8012.241
Percentage of FinancingReceivableAllowanceForCreditLosses0.20.20.20.20.20.31.11.11.21.34.14.34.63.94.34.54.64.95.15.55.75.86.06.6

wabc:ConstructionPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value0.0050.0060.0060.0070.0070.1070.1091.5991.1170.8531.4650.2540.210.1750.3350.2960.160.1120.1520.1450.1670.1870.2350.654
Percentage of FinancingReceivableAllowanceForCreditLosses0.00.00.00.00.00.40.68.15.64.26.91.20.90.81.51.30.70.40.60.60.60.60.81.9

us-gaap:FinancingReceivableModificationsRecordedInvestment

us-gaap:FinancingReceivableModificationsRecordedInvestment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value5.1745.2276.2216.3046.3246.3626.7136.7547.4347.5058.5798.7479.0899.55121212121212171915126.5946.5374.8375.9075.3325.2715.4537.5388.0148.7076.6781.7365.1753.8413.447
Percentage of FinancingReceivableModificationsRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-31
Value4.9985.0496.046.1216.1396.1566.4926.5176.5316.5487.5687.6427.9078.301101111101010151712103.7972.9282.7872.3262.289
Percentage of FinancingReceivableModificationsRecordedInvestment96.696.697.197.197.196.896.796.587.987.288.287.487.086.989.389.188.786.486.286.086.787.980.778.757.660.547.243.642.0

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value0.1760.1780.1810.1830.1850.1880.1890.1930.1950.1970.20.2010.2040.2060.2080.2110.2140.2170.2190.220.2230.2240.2260.230.237
Percentage of FinancingReceivableModificationsRecordedInvestment3.43.42.92.92.93.02.82.92.62.62.32.32.22.21.71.71.71.71.81.81.21.11.41.83.6

us-gaap:FinancingReceivableModificationsRecordedInvestment us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

wabc:RestructuredLoans


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value5.1745.2276.2216.3046.3246.3626.7136.7547.4347.5058.5798.7479.0899.55121212121212171915126.5946.5374.8375.9075.3325.2715.4537.5388.0146.678
Percentage of FinancingReceivableModificationsRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-31
Value4143
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear100.0100.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-31
Value150171
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear361.9392.8

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-31
Value2021
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear49.149.4

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

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-31
Value4143
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear99.999.9

us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-31
Value0.0360.038
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear0.10.1

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-31
Value137157
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear329.4360.4

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-31
Value1314
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear32.532.4

us-gaap:ResidentialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-31
Value1820
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear45.346.3

us-gaap:ResidentialPortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-31
Value1.571.337
Percentage of FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear3.83.1

us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value6.2119.4771026
Percentage of FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear100.0100.0100.0100.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value939710053
Percentage of FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear1508.01028.6944.1205.6

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

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value6.2119.4771026
Percentage of FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear100.0100.0100.0100.0

us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Financing
Period End2020-09-30
Value0.001
Percentage of FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear0.0

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value939710043
Percentage of FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear1503.91027.5943.1167.6

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.2550.1040.1059.921
Percentage of FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear4.11.11.038.0

us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value137117348278
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear100.0100.0100.0100.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value442056472
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear32.617.9161.726.0

us-gaap:ResidentialPortfolioSegment


Financing
Period End2020-12-31
Value23
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear6.7

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

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value137117341270
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear99.9100.097.897.2

us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302020-12-312020-09-30
Value0.1087.6797.876
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear0.12.22.8

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value442054571
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear32.617.9156.325.7

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2020-12-312020-09-30
Value180.844
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear5.40.3

us-gaap:ResidentialPortfolioSegment, us-gaap:Pass


Financing
Period End2020-12-31
Value22
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear6.3

us-gaap:ResidentialPortfolioSegment, us-gaap:Substandard


Financing
Period End2020-12-31
Value1.366
Percentage of FinancingReceivableOriginatedInCurrentFiscalYear0.4

us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value9418222742
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear100.0100.0100.0100.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value88899494
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear93.649.441.5223.1

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

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value9417421942
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear100.095.996.7100.0

us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Financing
Period End2021-03-312020-12-31
Value7.4097.584
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear4.13.3

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value87899394
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear92.748.941.1223.1

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-312020-12-31
Value0.8320.8360.84
Percentage of FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear0.90.50.4

us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value11181910
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear100.0100.0100.0100.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value828493101
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear740.2471.4482.6937.7

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

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value11181910
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear100.0100.099.9100.0

us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Financing
Period End2020-12-31
Value0.013
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear0.1

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value828493101
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear740.2471.4482.6936.7

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2020-09-30
Value0.107
Percentage of FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear1.0

us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value34354121
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear100.0100.0100.0100.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value82849295
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear241.0235.0221.4448.0

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

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value34354121
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear100.0100.0100.0100.0

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value80829095
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear235.0229.3216.5448.0

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-312020-12-31
Value2.0292.0362.043
Percentage of FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear5.95.74.9

us-gaap:FinancingReceivableRecordedInvestmentCurrent

us-gaap:FinancingReceivableRecordedInvestmentCurrent


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value1284124713001304111111141122115011951193118311851215127512711304133013351346140614461503154315941645166216961748177817851814187819832050213522312332241125342742
Percentage of FinancingReceivableRecordedInvestmentCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentCurrent us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value448394444439221221215243275274275287306334316342351353
Percentage of FinancingReceivableRecordedInvestmentCurrent34.931.634.233.719.919.819.221.123.123.023.324.225.226.324.926.226.426.5

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value543560559564574573574570579574559543544561565557553533
Percentage of FinancingReceivableRecordedInvestmentCurrent42.344.943.043.351.751.551.249.648.448.247.345.844.844.144.542.741.639.9

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value272270272274284286291293295297297298302307315330345360
Percentage of FinancingReceivableRecordedInvestmentCurrent21.221.721.021.025.625.726.025.524.724.925.125.224.924.124.825.326.027.0

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value202224262931343741434753596569717886
Percentage of FinancingReceivableRecordedInvestmentCurrent1.61.81.92.02.62.93.03.33.53.64.04.54.95.15.45.55.96.4

wabc:ConstructionPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.1150.1290.140.1512.2141.6186.6785.4823.5553.9823.9393.2542.9415.6494.9922.6991.882.329
Percentage of FinancingReceivableRecordedInvestmentCurrent0.00.00.00.00.20.10.60.50.30.30.30.30.20.40.40.20.10.2

us-gaap:FinancingReceivableRecordedInvestmentCurrent us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, wabc:RevolvingLoansAmortizedCostBasis


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value25270293236
Percentage of FinancingReceivableRecordedInvestmentCurrent2.021.72.32.53.3

us-gaap:ConsumerPortfolioSegment, wabc:TermLoanOriginatedPrior


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value188.6575.0875.6997.333
Percentage of FinancingReceivableRecordedInvestmentCurrent1.50.70.40.40.7

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2015


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value156.4577.2310
Percentage of FinancingReceivableRecordedInvestmentCurrent1.30.50.60.9

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2016


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value21192026
Percentage of FinancingReceivableRecordedInvestmentCurrent1.71.51.62.4

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2017


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value1847242430
Percentage of FinancingReceivableRecordedInvestmentCurrent1.43.81.91.92.7

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2018


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value4162535162
Percentage of FinancingReceivableRecordedInvestmentCurrent3.35.04.13.95.6

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2019


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value5686696781
Percentage of FinancingReceivableRecordedInvestmentCurrent4.47.05.35.27.3

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2020


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value81242646430
Percentage of FinancingReceivableRecordedInvestmentCurrent6.319.45.04.92.7

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2021


Financing
Period End2021-03-31
Value29
Percentage of FinancingReceivableRecordedInvestmentCurrent2.3

us-gaap:ConsumerPortfolioSegment, wabc:TotalTermLoans


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value24628242241247
Percentage of FinancingReceivableRecordedInvestmentCurrent19.22.318.718.522.3

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value4.2163.9714.3294.384.2334.3524.444.3033.8474.04.8685.4814.8936.145.9265.7836.6956.6678.3856.2931317141616131718201721363029324346445358107
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.0830.1070.1150.1230.1970.0260.10.0120.00.2240.2710.2970.2710.4030.0320.194
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus1.92.42.72.84.40.62.60.30.04.64.45.04.76.00.52.3

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value3.4173.4183.723.7223.8353.8364.0964.1773.673.8724.2255.4384.6695.6735.4335.5125.7926.446.889
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus81.086.185.985.090.688.192.397.195.496.886.899.295.492.491.795.386.596.682.2

us-gaap:ConsumerPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.3860.4020.3650.390.2830.3930.1470.10.0770.1160.1270.0430.1960.1960.00.1950.1950.241
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus9.210.18.48.96.79.03.32.32.02.92.60.83.23.30.02.92.92.9

us-gaap:ResidentialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value0.4130.1510.1610.1610.00.00.00.00.00.5160.00.00.00.00.00.3051.061
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus9.83.83.73.70.00.00.00.00.010.60.00.00.00.00.04.612.7

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConsumerPortfolioSegment, wabc:RevolvingLoansAmortizedCostBasis


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.3860.3650.3650.390.2830.393
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus9.29.28.48.96.79.0

us-gaap:ConsumerPortfolioSegment, wabc:TermLoanOriginatedPrior


Financing
Period End2021-03-312020-06-302020-03-31
Value0.0370.00.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.90.00.0

us-gaap:ConsumerPortfolioSegment, wabc:TotalTermLoans


Financing
Period End2021-03-312020-12-312020-06-302020-03-31
Value0.0370.3650.00.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.98.40.00.0

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

us-gaap:FinancingReceivableRecordedInvestmentPastDue

us-gaap:ConsumerPortfolioSegment, wabc:RevolvingLoansAmortizedCostBasis, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.1322.010.0150.3160.101
Percentage of FinancingReceivableRecordedInvestmentPastDue100.0100.0100.0100.0100.0

us-gaap:ConsumerPortfolioSegment, wabc:RevolvingLoansAmortizedCostBasis, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0450.4720.0020.120.002
Percentage of FinancingReceivableRecordedInvestmentPastDue34.123.513.338.02.0

us-gaap:ConsumerPortfolioSegment, wabc:RevolvingLoansAmortizedCostBasis, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0040.450.0030.0030.004
Percentage of FinancingReceivableRecordedInvestmentPastDue3.022.420.00.94.0

us-gaap:ConsumerPortfolioSegment, wabc:TermLoanOriginatedPrior, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.1330.1250.0350.0310.057
Percentage of FinancingReceivableRecordedInvestmentPastDue100.86.2233.39.856.4

us-gaap:ConsumerPortfolioSegment, wabc:TermLoanOriginatedPrior, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0480.040.0020.0080.026
Percentage of FinancingReceivableRecordedInvestmentPastDue36.42.013.32.525.7

us-gaap:ConsumerPortfolioSegment, wabc:TermLoanOriginatedPrior, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-06-302020-03-31
Value0.0210.0330.0060.007
Percentage of FinancingReceivableRecordedInvestmentPastDue15.91.61.96.9

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2015, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.0860.0910.0610.225
Percentage of FinancingReceivableRecordedInvestmentPastDue4.3606.719.3222.8

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2015, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.0190.030.0230.107
Percentage of FinancingReceivableRecordedInvestmentPastDue0.9200.07.3105.9

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2015, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.0490.0050.0350.008
Percentage of FinancingReceivableRecordedInvestmentPastDue2.433.311.17.9

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2016, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.20.1470.1020.27
Percentage of FinancingReceivableRecordedInvestmentPastDue10.0980.032.3267.3

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2016, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.1150.0480.030.108
Percentage of FinancingReceivableRecordedInvestmentPastDue5.7320.09.5106.9

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2016, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.050.0290.0290.023
Percentage of FinancingReceivableRecordedInvestmentPastDue2.5193.39.222.8

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2017, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0990.620.2240.2060.329
Percentage of FinancingReceivableRecordedInvestmentPastDue75.030.81493.365.2325.7

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2017, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0390.040.1630.0320.148
Percentage of FinancingReceivableRecordedInvestmentPastDue29.52.01086.710.1146.5

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2017, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2020-12-312020-06-302020-03-31
Value0.1310.050.017
Percentage of FinancingReceivableRecordedInvestmentPastDue6.515.816.8

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2018, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.390.5190.2660.20.543
Percentage of FinancingReceivableRecordedInvestmentPastDue295.525.81773.363.3537.6

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2018, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0210.1650.3270.0590.301
Percentage of FinancingReceivableRecordedInvestmentPastDue15.98.22180.018.7298.0

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2018, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0410.1420.2260.0790.076
Percentage of FinancingReceivableRecordedInvestmentPastDue31.17.11506.725.075.2

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2019, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.3580.4280.4020.3160.541
Percentage of FinancingReceivableRecordedInvestmentPastDue271.221.32680.0100.0535.6

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2019, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.2230.0760.160.1530.196
Percentage of FinancingReceivableRecordedInvestmentPastDue168.93.81066.748.4194.1

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2019, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0130.0430.0660.0850.043
Percentage of FinancingReceivableRecordedInvestmentPastDue9.82.1440.026.942.6

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2020, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.4271.9780.1480.2480.042
Percentage of FinancingReceivableRecordedInvestmentPastDue323.598.4986.778.541.6

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2020, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.1060.4550.040.020.0
Percentage of FinancingReceivableRecordedInvestmentPastDue80.322.6266.76.30.0

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2020, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0530.4480.0310.0030.0
Percentage of FinancingReceivableRecordedInvestmentPastDue40.222.3206.70.90.0

us-gaap:ConsumerPortfolioSegment, wabc:TermLoansOriginatedIn2021, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-31
Value0.051
Percentage of FinancingReceivableRecordedInvestmentPastDue38.6

us-gaap:ConsumerPortfolioSegment, wabc:TotalTermLoans, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value1.4580.0321.3131.1642.007
Percentage of FinancingReceivableRecordedInvestmentPastDue1104.51.68753.3368.41987.1

us-gaap:ConsumerPortfolioSegment, wabc:TotalTermLoans, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.4370.0170.770.3250.886
Percentage of FinancingReceivableRecordedInvestmentPastDue331.10.85133.3102.8877.2

us-gaap:ConsumerPortfolioSegment, wabc:TotalTermLoans, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.1280.0020.3570.2870.174
Percentage of FinancingReceivableRecordedInvestmentPastDue97.00.12380.090.8172.3

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

us-gaap:CommercialPortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.2140.7130.9630.220.2150.5310.3390.290.7470.7810.4250.8990.2270.6270.4041.9871.9790.966
Percentage of FinancingReceivableRecordedInvestmentPastDue162.135.56420.069.6212.90.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommercialPortfolioSegment, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.0060.0390.0090.2350.1580.1190.00.0210.2540.3470.2530.0840.1640.0660.2211.0720.04
Percentage of FinancingReceivableRecordedInvestmentPastDue0.3260.02.8232.70.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2.0280.6243.6751.4380.4320.7293.4721.3080.6172.3343.322.8091.1432.820.8614.9221.46
Percentage of FinancingReceivableRecordedInvestmentPastDue1536.44160.01163.01423.80.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsumerPortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1.592.011.3281.482.1082.962.8792.4042.6263.4083.0012.7792.6673.3213.3512.5972.7643.288
Percentage of FinancingReceivableRecordedInvestmentPastDue1204.5100.08853.3468.42087.10.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsumerPortfolioSegment, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.4820.4720.7720.4450.8881.5170.7370.7610.5981.1070.8010.7070.5311.0770.7530.6110.6930.989
Percentage of FinancingReceivableRecordedInvestmentPastDue365.223.55146.7140.8879.20.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsumerPortfolioSegment, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.1320.450.360.290.1780.440.3490.2490.3940.5510.3610.1930.2550.5310.4340.1860.3730.497
Percentage of FinancingReceivableRecordedInvestmentPastDue100.022.42400.091.8176.20.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResidentialPortfolioSegment, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.5380.770.5580.5210.7840.2740.8280.280.7890.5160.30.00.00.2091.2990.528
Percentage of FinancingReceivableRecordedInvestmentPastDue407.638.33720.0164.9776.20.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResidentialPortfolioSegment, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value0.2710.4220.0240.540.4560.00.1890.9310.00.00.00.3080.037
Percentage of FinancingReceivableRecordedInvestmentPastDue13.5133.523.80.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivableRecordedInvestmentPastDue us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value4.373.4933.4735.8964.5454.1974.7756.4464.6815.5956.2766.9986.0035.0916.5755.654106.4689.6976.5326.703129.1511617
Percentage of FinancingReceivableRecordedInvestmentPastDue3310.6173.823153.31865.84500.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value0.4820.7490.8111.2331.1472.6361.3120.8210.6192.3351.1482.6940.9751.3660.8271.1522.371.5111.2393.0492.1912.1882.2813.7271.972
Percentage of FinancingReceivableRecordedInvestmentPastDue365.237.35406.7390.21135.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value0.1320.450.360.290.1780.440.3510.2490.3940.5510.3610.1930.2550.5310.4340.1860.3730.4970.4870.3560.260.2950.4810.2210.502
Percentage of FinancingReceivableRecordedInvestmentPastDue100.022.42400.091.8176.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivableRevolving us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableRevolving

us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value274239440
Percentage of FinancingReceivableRevolving100.0100.0100.0100.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2020-12-31
Value564
Percentage of FinancingReceivableRevolving142.9

us-gaap:ResidentialPortfolioSegment


Financing
Period End2020-12-31
Value23
Percentage of FinancingReceivableRevolving5.9

wabc:ConstructionPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.1130.1150.1290.14
Percentage of FinancingReceivableRevolving0.40.30.00.3

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

us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value274138640
Percentage of FinancingReceivableRevolving98.197.897.898.9

us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.5390.9188.6620.448
Percentage of FinancingReceivableRevolving1.92.22.21.1

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2020-12-31
Value545
Percentage of FinancingReceivableRevolving138.1

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2020-12-31
Value18
Percentage of FinancingReceivableRevolving4.8

us-gaap:ResidentialPortfolioSegment, us-gaap:Pass


Financing
Period End2020-12-31
Value22
Percentage of FinancingReceivableRevolving5.6

us-gaap:ResidentialPortfolioSegment, us-gaap:Substandard


Financing