$WABC
Westamerica Bancorp Stock $wabc

$wabc Overview Financials Valuation SEC Filings Company Website

2023 Q2 Form 10-Q Financial Statement

#000117184323003090 Filed on May 09, 2023

Income Statement

Concept	2023 Q2	2023 Q1	2022 Q1
Revenue	$70.49M	$69.62M	$43.76M
YoY Change	46.86%	59.11%	3.41%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.708M	$3.044M	$5.498M
YoY Change	-45.95%	-44.63%	27.86%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$607.0K	$471.0K	$480.0K
YoY Change	25.67%	-1.88%	1.05%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$54.74M	$55.04M	$29.98M
YoY Change	60.31%	83.6%	10.53%
Income Tax	$14.50M	$14.59M	$7.364M
% Of Pretax Income	26.48%	26.51%	24.56%
Net Earnings	$40.25M	$40.45M	$22.62M
YoY Change	59.0%	78.86%	12.25%
Net Earnings / Revenue	57.1%	58.1%	51.68%
Basic Earnings Per Share	$1.51	$1.51	$0.84
Diluted Earnings Per Share	$1.51	$1.51	$0.84
COMMON SHARES
Basic Shares Outstanding	26.65M	26.91M	26.87M
Diluted Shares Outstanding	26.65M	26.87M	26.89M

Balance Sheet

Concept	2023 Q2	2023 Q1	2022 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$266.2M	$195.2M	$1.038B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$27.91M	$28.33M	$30.63M
YoY Change	-7.92%	-7.49%	-4.94%
Goodwill	$121.7M	$121.7M	$121.7M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$14.23M	$14.09M	$14.23M
YoY Change	0.0%	-0.94%	0.19%
Other Assets	$122.5M	$114.6M	$55.70M
YoY Change	26.46%	105.71%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$6.583B	$6.700B	$7.306B
YoY Change	-8.86%	-8.29%	5.7%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$16.79M	$15.45M	$17.46M
YoY Change	-4.37%	-11.51%	-15.26%
Deferred Revenue
YoY Change
Short-Term Debt	$138.0M	$83.09M	$124.4M
YoY Change	16.79%	-33.23%	30.33%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$138.0M	$98.54M	$17.46M
YoY Change	686.08%	464.48%	-15.26%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change			-100.0%
Other Long-Term Liabilities	$86.95M	$59.70M	$56.90M
YoY Change	84.24%	4.91%	8.38%
Total Long-Term Liabilities	$86.95M	$59.70M	$56.90M
YoY Change	84.24%	4.91%	4.98%
TOTAL LIABILITIES
Total Short-Term Liabilities	$138.0M	$98.54M	$17.46M
Total Long-Term Liabilities	$86.95M	$59.70M	$56.90M
Total Liabilities	$5.931B	$6.058B	$6.605B
YoY Change	-10.21%	-8.28%	8.27%
SHAREHOLDERS EQUITY
Retained Earnings	$432.4M	$403.3M	$317.6M
YoY Change	30.4%	27.01%	16.18%
Common Stock	$471.5M	$471.1M	$472.4M
YoY Change	-0.43%	-0.28%	0.55%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$651.9M	$642.9M	$701.7M
YoY Change
Total Liabilities & Shareholders Equity	$6.583B	$6.700B	$7.306B
YoY Change	-8.86%	-8.29%	5.7%

Cashflow Statement

Concept	2023 Q2	2023 Q1	2022 Q1
OPERATING ACTIVITIES
Net Income	$40.25M	$40.45M	$22.62M
YoY Change	59.0%	78.86%	12.25%
Depreciation, Depletion And Amortization	$2.708M	$3.044M	$5.498M
YoY Change	-45.95%	-44.63%	27.86%
Cash From Operating Activities	$52.58M	$55.08M	$31.82M
YoY Change	396.04%	73.09%	-1.39%
INVESTING ACTIVITIES
Capital Expenditures	$79.00K	$511.0K	$198.0K
YoY Change	-120.05%	158.08%	36.55%
Acquisitions
YoY Change
Other Investing Activities	$168.1M	$172.1M	-$85.35M
YoY Change	-158.51%	-301.66%	827.75%
Cash From Investing Activities	$168.1M	$171.6M	-$85.55M
YoY Change	-158.4%	-300.6%	820.3%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$218.0K
YoY Change			-6.03%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-149.7M	-$325.7M	-$40.76M
YoY Change	2002.3%	699.06%	-118.35%
NET CHANGE
Cash From Operating Activities	52.58M	$55.08M	$31.82M
Cash From Investing Activities	168.1M	$171.6M	-$85.55M
Cash From Financing Activities	-149.7M	-$325.7M	-$40.76M
Net Change In Cash	70.98M	-$99.03M	-$94.49M
YoY Change	-124.97%	4.81%	-138.54%
FREE CASH FLOW
Cash From Operating Activities	$52.58M	$55.08M	$31.82M
Capital Expenditures	$79.00K	$511.0K	$198.0K
Free Cash Flow	$52.50M	$54.57M	$31.63M
YoY Change	377.54%	72.56%	-1.56%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022Q1	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	28566000	usd
CY2023Q1	dei	Amendment Flag AmendmentFlag	false
CY2023Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2023Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	1000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	1000	usd
CY2023Q1	wabc	Debt Securities Heldtomaturity Fair Value Net DebtSecuritiesHeldtomaturityFairValueNet	875268000	usd
CY2022Q4	wabc	Debt Securities Heldtomaturity Fair Value Net DebtSecuritiesHeldtomaturityFairValueNet	873511000	usd
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2023Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.42
CY2023Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q1	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2022Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue	0
CY2023Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000
CY2023Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	26648000
CY2023Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	26648000
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	26913000
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	26913000
CY2022Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.42
CY2023Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.42
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	1000	usd
CY2022Q4	wabc	Loans And Leases Receivable Nonaccrual Commitment To Lend LoansAndLeasesReceivableNonaccrualCommitmentToLend	0	usd
CY2022Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
CY2022Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	0	usd
CY2022Q4	us-gaap	Other Real Estate OtherRealEstate	0	usd
CY2023Q1	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0	usd
CY2023Q1	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P5Y
CY2023Q1	us-gaap	Lessee Operating Lease Renewal Term LesseeOperatingLeaseRenewalTerm	P5Y
CY2023Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15447000	usd
CY2023Q1	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2022	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2022	wabc	Amortization Expense Adjustment Resulting From A Change In Estimates Of Useful Lives Or Residual Values AmortizationExpenseAdjustmentResultingFromAChangeInEstimatesOfUsefulLivesOrResidualValues	0	usd
CY2023Q1	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	950000	usd
CY2023Q1	dei	Document Type DocumentType	10-Q
CY2023Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2023Q1	dei	Document Period End Date DocumentPeriodEndDate	2023-03-31
CY2023Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2023Q1	dei	Entity File Number EntityFileNumber	001-09383
CY2023Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	CA
CY2023Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	94-2156203
CY2023Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	1108 Fifth Avenue
CY2023Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	San Rafael
CY2023Q1	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2023Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	94901
CY2023Q1	dei	City Area Code CityAreaCode	707
CY2023Q1	dei	Local Phone Number LocalPhoneNumber	863-6000
CY2023Q1	dei	Security12b Title Security12bTitle	Common Stock, no par value
CY2023Q1	dei	Trading Symbol TradingSymbol	WABC
CY2023Q1	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2023Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2023Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023Q1	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	26648281
CY2023Q1	us-gaap	Cash And Due From Banks CashAndDueFromBanks	195202000	usd
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	294236000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4217513000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4331743000	usd
CY2023Q1	wabc	Held To Maturity Securities Net HeldToMaturitySecuritiesNet	909319000	usd
CY2022Q4	wabc	Held To Maturity Securities Net HeldToMaturitySecuritiesNet	915913000	usd
CY2023Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	938628000	usd
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	958488000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19509000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20284000	usd
CY2023Q1	us-gaap	Notes Receivable Net NotesReceivableNet	919119000	usd
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	938204000	usd
CY2023Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28331000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28819000	usd
CY2023Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	523000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	583000	usd
CY2023Q1	us-gaap	Goodwill Goodwill	121673000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	121673000	usd
CY2023Q1	us-gaap	Other Assets OtherAssets	308791000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	319146000	usd
CY2023Q1	us-gaap	Assets Assets	6700471000	usd
CY2022Q4	us-gaap	Assets Assets	6950317000	usd
CY2023Q1	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	2788992000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	2947277000	usd
CY2023Q1	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	3110323000	usd
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities Domestic InterestBearingDepositLiabilitiesDomestic	3278013000	usd
CY2023Q1	us-gaap	Deposits Deposits	5899315000	usd
CY2022Q4	us-gaap	Deposits Deposits	6225290000	usd
CY2023Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	83088000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	57792000	usd
CY2023Q1	us-gaap	Other Liabilities OtherLiabilities	75143000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	65125000	usd
CY2023Q1	us-gaap	Liabilities Liabilities	6057546000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	6348207000	usd
CY2023Q1	us-gaap	Common Stock Value CommonStockValue	471124000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	475086000	usd
CY2023Q1	wabc	Deferred Compensation DeferredCompensation	35000	usd
CY2022Q4	wabc	Deferred Compensation DeferredCompensation	35000	usd
CY2023Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-231573000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-256105000	usd
CY2023Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	403339000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	383094000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	642925000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	602110000	usd
CY2023Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6700471000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6950317000	usd
CY2023Q1	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	11740000	usd
CY2022Q1	us-gaap	Interest And Fee Income Loans And Leases Held In Portfolio InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio	12942000	usd
CY2023Q1	wabc	Interest And Dividend Income Equity Securities Operating InterestAndDividendIncomeEquitySecuritiesOperating	152000	usd
CY2022Q1	wabc	Interest And Dividend Income Equity Securities Operating InterestAndDividendIncomeEquitySecuritiesOperating	128000	usd
CY2023Q1	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	46810000	usd
CY2022Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.42
CY2023Q1	us-gaap	Interest And Dividend Income Securities Held To Maturity InterestAndDividendIncomeSecuritiesHeldToMaturity	8980000	usd
CY2022Q1	us-gaap	Interest And Dividend Income Securities Held To Maturity InterestAndDividendIncomeSecuritiesHeldToMaturity	1644000	usd
CY2023Q1	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	1942000	usd
CY2022Q1	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	479000	usd
CY2023Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	69624000	usd
CY2022Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	43759000	usd
CY2023Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	458000	usd
CY2022Q1	us-gaap	Interest Expense Deposits InterestExpenseDeposits	452000	usd
CY2023Q1	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	13000	usd
CY2022Q1	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	28000	usd
CY2023Q1	us-gaap	Interest Expense InterestExpense	471000	usd
CY2022Q1	us-gaap	Interest Expense InterestExpense	480000	usd
CY2023Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	69153000	usd
CY2022Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	43279000	usd
CY2023Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-1550000	usd
CY2022Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	0	usd
CY2023Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	70703000	usd
CY2022Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	43279000	usd
CY2023Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	898000	usd
CY2022Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	639000	usd
CY2023Q1	us-gaap	Noninterest Income NoninterestIncome	10549000	usd
CY2022Q1	us-gaap	Noninterest Income NoninterestIncome	11576000	usd
CY2023Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	12067000	usd
CY2022Q1	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11920000	usd
CY2023Q1	us-gaap	Occupancy Net OccupancyNet	5485000	usd
CY2022Q1	us-gaap	Occupancy Net OccupancyNet	4746000	usd
CY2023Q1	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2444000	usd
CY2022Q1	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2437000	usd
CY2023Q1	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-1434000	usd
CY2022Q1	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-1431000	usd
CY2023Q1	wabc	Contract Courier Expense ContractCourierExpense	615000	usd
CY2022Q1	wabc	Contract Courier Expense ContractCourierExpense	582000	usd
CY2023Q1	us-gaap	Professional Fees ProfessionalFees	476000	usd
CY2022Q1	us-gaap	Professional Fees ProfessionalFees	736000	usd
CY2023Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3689000	usd
CY2022Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3023000	usd
CY2023Q1	us-gaap	Noninterest Expense NoninterestExpense	26210000	usd
CY2022Q1	us-gaap	Noninterest Expense NoninterestExpense	24875000	usd
CY2023Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	55042000	usd
CY2022Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	29980000	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14591000	usd
CY2022Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7364000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	40451000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	22616000	usd
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26859000
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26870000
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26866000
CY2022Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26885000
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.51
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.51
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	40451000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	22616000	usd
CY2022Q1	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-65650000	usd
CY2023Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	-0	usd
CY2022Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	331191000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	34830000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-195871000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	10298000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-57907000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	24532000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-137964000	usd
CY2023Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	64983000	usd
CY2022Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-115348000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	827102000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	22616000	usd
CY2022Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-137964000	usd
CY2022Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	624000	usd
CY2022Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	492000	usd
CY2022Q1	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	339000	usd
CY2022Q1	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	37000	usd
CY2022Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	218000	usd
CY2022Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	11284000	usd
CY2022Q1	us-gaap	Stockholders Equity StockholdersEquity	701744000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	602110000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	40451000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	24532000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	508000	usd
CY2023Q1	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	339000	usd
CY2023Q1	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	35000	usd
CY2023Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	13747000	usd
CY2023Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	11303000	usd
CY2023Q1	us-gaap	Stockholders Equity StockholdersEquity	642925000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	40451000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	22616000	usd
CY2023Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	3044000	usd
CY2022Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	5498000	usd
CY2023Q1	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	128000	usd
CY2022Q1	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	627000	usd
CY2023Q1	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	339000	usd
CY2022Q1	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	339000	usd
CY2023Q1	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	118000	usd
CY2022Q1	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-878000	usd
CY2023Q1	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-14336000	usd
CY2022Q1	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-7662000	usd
CY2023Q1	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-254000	usd
CY2022Q1	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	298000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-380000	usd
CY2022Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	238000	usd
CY2023Q1	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	32000	usd
CY2022Q1	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	29000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-3508000	usd
CY2022Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-4036000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	55082000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	31823000	usd
CY2023Q1	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-19213000	usd
CY2023Q1	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	2192000	usd
CY2022Q1	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	-0	usd
CY2023Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	147030000	usd
CY2022Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	154734000	usd
CY2023Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	8073000	usd
CY2022Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	25454000	usd
CY2023Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	511000	usd
CY2022Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	198000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	171613000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-85551000	usd
CY2023Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-325975000	usd
CY2022Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-8082000	usd
CY2023Q1	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	25296000	usd
CY2022Q1	us-gaap	Proceeds From Repayments Of Debt ProceedsFromRepaymentsOfDebt	-21804000	usd
CY2023Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2022Q1	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	624000	usd
CY2023Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	13747000	usd
CY2022Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	218000	usd
CY2023Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11303000	usd
CY2022Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	11284000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-325729000	usd
CY2022Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-40764000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-99034000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-94492000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	294236000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1132085000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	195202000	usd
CY2022Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1037593000	usd
CY2023Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1144000	usd
CY2022Q1	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	918000	usd
CY2023Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	1519000	usd
CY2022Q1	us-gaap	Operating Lease Payments OperatingLeasePayments	1518000	usd
CY2023Q1	us-gaap	Interest Paid Net InterestPaidNet	439000	usd
CY2022Q1	us-gaap	Interest Paid Net InterestPaidNet	451000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4331743000	usd
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	915914000	usd
CY2023Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	1000	usd
CY2023Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4546281000	usd
CY2023Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1485000	usd
CY2023Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	330253000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4217513000	usd
CY2023Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	909320000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	161000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	34213000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	875268000	usd
CY2023Q1	wabc	Debt Securities Availableforsale And Heldtomaturity Amortized Cost DebtSecuritiesAvailableforsaleAndHeldtomaturityAmortizedCost	5455601000	usd
CY2023Q1	wabc	Debt Securities Gross Unrecognized Gains DebtSecuritiesGrossUnrecognizedGains	1646000	usd
CY2023Q1	wabc	Debt Securities Gross Unrecognized Losses DebtSecuritiesGrossUnrecognizedLosses	364466000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale And Held To Maturity DebtSecuritiesAvailableForSaleAndHeldToMaturity	5092781000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4695341000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1625000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	365223000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	86000	usd
CY2022Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	42489000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	873511000	usd
CY2022Q4	wabc	Debt Securities Availableforsale And Heldtomaturity Amortized Cost DebtSecuritiesAvailableforsaleAndHeldtomaturityAmortizedCost	5611255000	usd
CY2022Q4	wabc	Debt Securities Gross Unrecognized Gains DebtSecuritiesGrossUnrecognizedGains	1711000	usd
CY2022Q4	wabc	Debt Securities Gross Unrecognized Losses DebtSecuritiesGrossUnrecognizedLosses	407712000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity DebtSecuritiesAvailableForSaleAndHeldToMaturity	5205254000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	145818000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	145099000	usd
CY2023Q1	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	17247000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	17240000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	687888000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	649204000	usd
CY2023Q1	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	232935000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	227496000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	2736621000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	2486560000	usd
CY2023Q1	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	561132000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	538990000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	678407000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	660572000	usd
CY2023Q1	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	0	usd
CY2023Q1	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	0	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	4248734000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	3941435000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	811314000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	783726000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	297547000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	276078000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	98006000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	91542000	usd
CY2023Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4546281000	usd
CY2023Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4217513000	usd
CY2023Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	909320000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	875268000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	251578000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	250317000	usd
CY2022Q4	us-gaap	Heldtomaturity Securities Debt Maturities Next Rolling Twelve Months Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost	12676000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	12659000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	584707000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	554596000	usd
CY2022Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	161653000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	158409000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	2869559000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	2570159000	usd
CY2022Q4	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	636733000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	605081000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	678408000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	670623000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	0	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	4384252000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	4045695000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	811062000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	776149000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	311089000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	286048000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount	104852000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Without Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	97362000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4695341000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4331743000	usd
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	915914000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	873511000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	174	pure
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1285761000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	47932000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	276	pure
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	2193360000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	282321000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	450	pure
CY2023Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	3479121000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	330253000	usd
CY2023Q1	wabc	Heldtomaturity Securities Less Than12 Months Number Of Positions HeldtomaturitySecuritiesLessThan12MonthsNumberOfPositions	103	pure
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	717032000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	27835000	usd
CY2023Q1	wabc	Heldtomaturity Securities12 Months Or Longer Number Of Positions HeldtomaturitySecurities12MonthsOrLongerNumberOfPositions	77	pure
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	91344000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	6378000	usd
CY2023Q1	wabc	Heldtomaturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 HeldtomaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	180	pure
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	808376000	usd
CY2023Q1	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	34213000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	376	pure
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	2673207000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	225835000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	93	pure
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	757794000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	139388000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	469	pure
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	3431001000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	365223000	usd
CY2022Q4	wabc	Heldtomaturity Securities Less Than12 Months Number Of Positions HeldtomaturitySecuritiesLessThan12MonthsNumberOfPositions	200	pure
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	821756000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	42390000	usd
CY2022Q4	wabc	Heldtomaturity Securities12 Months Or Longer Number Of Positions HeldtomaturitySecurities12MonthsOrLongerNumberOfPositions	2	pure
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	682000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	99000	usd
CY2022Q4	wabc	Heldtomaturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 HeldtomaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	202	pure
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	822438000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	42489000	usd
CY2023Q1	us-gaap	Debt Securities Held To Maturity Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityCreditLossExpenseReversal	0	usd
CY2022Q1	us-gaap	Debt Securities Held To Maturity Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityCreditLossExpenseReversal	0	usd
CY2023Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Writeoff DebtSecuritiesHeldToMaturityAllowanceForCreditLossWriteoff	0	usd
CY2022Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Writeoff DebtSecuritiesHeldToMaturityAllowanceForCreditLossWriteoff	0	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	1000	usd
CY2021Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	7000	usd
CY2023Q1	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	214000	usd
CY2023Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	938628000	usd
CY2023Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Recovery DebtSecuritiesHeldToMaturityAllowanceForCreditLossRecovery	0	usd
CY2022Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Recovery DebtSecuritiesHeldToMaturityAllowanceForCreditLossRecovery	0	usd
CY2023Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	1000	usd
CY2022Q1	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	7000	usd
CY2023Q1	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	909320000	usd
CY2023Q1	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	54749000	usd
CY2022Q1	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	28733000	usd
CY2023Q1	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1193000	usd
CY2022Q1	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1605000	usd
CY2023Q1	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	55942000	usd
CY2022Q1	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	30338000	usd
CY2023Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	938628000	usd
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	958488000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	20284000	usd
CY2023Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-1550000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	2039000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2814000	usd
CY2023Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	19509000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	23514000	usd
CY2022Q1	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	0	usd
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1212000	usd
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	623000	usd
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	22925000	usd
CY2023Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	938628000	usd
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	958488000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	146000	usd
CY2023Q1	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	20842000	usd
CY2022Q4	wabc	Lihtc Investments LIHTCInvestments	34421000	usd
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	958488000	usd
CY2023Q1	wabc	Loans And Leases Receivable Nonaccrual Commitment To Lend LoansAndLeasesReceivableNonaccrualCommitmentToLend	0	usd
CY2023Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
CY2023Q1	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	0	usd
CY2023Q1	us-gaap	Other Real Estate OtherRealEstate	0	usd
CY2022Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0	usd
CY2023Q1	wabc	Unsecured Loan Limit Percentage Of Shareholders Equity California Financial Code UnsecuredLoanLimitPercentageOfShareholdersEquityCaliforniaFinancialCode	0.15	pure
CY2023Q1	wabc	Secured And Unsecured Loan Limit Percentage California Financial Code SecuredAndUnsecuredLoanLimitPercentageCaliforniaFinancialCode	0.25	pure
CY2023Q1	wabc	Loan Commitments Related To Real Estate Loans LoanCommitmentsRelatedToRealEstateLoans	33475000	usd
CY2022Q4	wabc	Loan Commitments Related To Real Estate Loans LoanCommitmentsRelatedToRealEstateLoans	34790000	usd
CY2023Q1	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	13935000	usd
CY2022Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	11743000	usd
CY2023Q1	us-gaap	Other Investments And Securities At Cost OtherInvestmentsAndSecuritiesAtCost	158000	usd
CY2022Q4	us-gaap	Other Investments And Securities At Cost OtherInvestmentsAndSecuritiesAtCost	158000	usd
CY2023Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	14093000	usd
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	11901000	usd
CY2023Q1	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	64521000	usd
CY2022Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	63816000	usd
CY2023Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	114588000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	125140000	usd
CY2023Q1	wabc	Lihtc Investments LIHTCInvestments	32987000	usd
CY2022Q4	wabc	Lihtc Investments LIHTCInvestments	34421000	usd
CY2023Q1	us-gaap	Interest Receivable Current InterestReceivableCurrent	53676000	usd
CY2022Q4	us-gaap	Interest Receivable Current InterestReceivableCurrent	53558000	usd
CY2023Q1	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	4531000	usd
CY2022Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	4894000	usd
CY2023Q1	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	8948000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	9670000	usd
CY2023Q1	us-gaap	Other Assets OtherAssets	308791000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	319146000	usd
CY2023Q1	us-gaap	Share Price SharePrice	225.46
CY2023Q1	wabc	Lihtc Investments LIHTCInvestments	32987000	usd
CY2022Q1	us-gaap	Net Income Loss NetIncomeLoss	22616000	usd
CY2022Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	22647000	usd
CY2023Q1	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	20842000	usd
CY2023Q1	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-1434000	usd
CY2022Q1	us-gaap	Income Loss From Affordable Housing Projects Equity Method Investments IncomeLossFromAffordableHousingProjectsEquityMethodInvestments	-1431000	usd
CY2023Q1	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1020000	usd
CY2022Q1	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	804000	usd
CY2023Q1	wabc	Other Liabilities Excluding Operating Lease Liability OtherLiabilitiesExcludingOperatingLeaseLiability	59696000	usd
CY2022Q4	wabc	Other Liabilities Excluding Operating Lease Liability OtherLiabilitiesExcludingOperatingLeaseLiability	49379000	usd
CY2023Q1	us-gaap	Other Liabilities OtherLiabilities	75143000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	65125000	usd
CY2023Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	15447000	usd
CY2023Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y3M18D
CY2023Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0205	pure
CY2023Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	1656000	usd
CY2022Q1	us-gaap	Operating Lease Cost OperatingLeaseCost	1633000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	4442000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4516000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3291000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1674000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	982000	usd
CY2023Q1	wabc	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	1153000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	16058000	usd
CY2023Q1	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	611000	usd
CY2023Q1	wabc	Amortization Expense Adjustment Resulting From A Change In Estimates Of Useful Lives Or Residual Values AmortizationExpenseAdjustmentResultingFromAChangeInEstimatesOfUsefulLivesOrResidualValues	0	usd
CY2023Q1	us-gaap	Goodwill Goodwill	121673000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	121673000	usd
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26859000
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26870000
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.51
CY2023Q1	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	2788992000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	2947277000	usd
CY2023Q1	us-gaap	Demand Deposit Accounts DemandDepositAccounts	1201356000	usd
CY2022Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	1273143000	usd
CY2023Q1	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1783667000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1874115000	usd
CY2023Q1	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	63891000	usd
CY2022Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	65962000	usd
CY2023Q1	wabc	Time Deposits100 Thousand Through250 Thousand TimeDeposits100ThousandThrough250Thousand	40334000	usd
CY2022Q4	wabc	Time Deposits100 Thousand Through250 Thousand TimeDeposits100ThousandThrough250Thousand	42733000	usd
CY2023Q1	wabc	Time Deposits More Than250 Thousand TimeDepositsMoreThan250Thousand	21075000	usd
CY2022Q4	wabc	Time Deposits More Than250 Thousand TimeDepositsMoreThan250Thousand	22060000	usd
CY2023Q1	us-gaap	Deposits Deposits	5899315000	usd
CY2022Q4	us-gaap	Deposits Deposits	6225290000	usd
CY2023Q1	wabc	Demand Deposit Overdrafts DemandDepositOverdrafts	818000	usd
CY2022Q4	wabc	Demand Deposit Overdrafts DemandDepositOverdrafts	995000	usd
CY2023Q1	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	34000	usd
CY2022Q1	us-gaap	Interest Expense Time Deposits100000 Or More InterestExpenseTimeDeposits100000OrMore	41000	usd
CY2023Q1	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<table border="0" cellpadding="0" cellspacing="0" class="finTable" style="margin-right: 20%; width: 80%; font-size: 10pt; font-family: Times New Roman; text-indent: 0px;"><tbody><tr style="vertical-align: bottom;"><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td colspan="6" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;">Repurchase Agreements (Sweep)<br/> Accounted for as Secured Borrowings</p> </td><td style="font-family: Times New Roman; font-size: 10pt; border-bottom: 1px solid rgb(0, 0, 0);"> </td></tr> <tr style="vertical-align: bottom;"><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td colspan="6" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;">Remaining Contractual Maturity of the Agreements</p> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td></tr> <tr style="vertical-align: bottom;"><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td colspan="6" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;">Overnight and Continuous</p> </td><td style="font-family: Times New Roman; font-size: 10pt; border-bottom: 1px solid rgb(0, 0, 0);"> </td></tr> <tr style="vertical-align: bottom;"><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td colspan="2" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;">At March 31,</p> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td colspan="2" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;">At December 31,</p> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td></tr> <tr style="vertical-align: bottom;"><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td colspan="2" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;">2023</p> </td><td style="font-family: Times New Roman; font-size: 10pt; border-bottom: 1px solid rgb(0, 0, 0);"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td colspan="2" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;">2022</p> </td><td style="font-family: Times New Roman; font-size: 10pt; border-bottom: 1px solid rgb(0, 0, 0);"> </td></tr> <tr style="vertical-align: bottom;"><td style="font-family: Times New Roman; font-size: 10pt; width: 62%;"> <p style="font-family: "Times New Roman"; font-size: 10pt; font-variant: normal; margin: 0pt;">Repurchase agreements:</p> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td colspan="6" style="text-align: center; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> <p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:center;margin:0pt;"><em style="font: inherit;"><em style="font: inherit;">(In thousands)</em></em></p> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td></tr> <tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"><td style="font-family: Times New Roman; font-size: 10pt;"> <p style="font-family: "Times New Roman"; font-size: 10pt; font-variant: normal; margin: 0pt 0pt 0pt 9pt;">Collateral securing borrowings:</p> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td><td style="font-family: Times New Roman; font-size: 10pt;"> </td></tr> <tr style="vertical-align: bottom; background-color: rgb(255, 255, 255);"><td style="font-family: Times New Roman; font-size: 10pt;"> <p style="font-family: "Times New Roman"; font-size: 10pt; font-variant: normal; margin: 0pt 0pt 0pt 18pt;">Agency residential MBS</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 16%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">29,160</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 16%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">30,108</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> </td></tr> <tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"><td style="font-family: Times New Roman; font-size: 10pt;"> <p style="font-family: "Times New Roman"; font-size: 10pt; font-variant: normal; margin: 0pt 0pt 0pt 18pt;">Corporate securities</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; padding-bottom: 1px;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; border-bottom: 1px solid rgb(0, 0, 0);"> </td><td style="width: 16%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);">247,439</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; padding-bottom: 1px;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; border-bottom: 1px solid rgb(0, 0, 0);"> </td><td style="width: 16%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);">203,774</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"> </td></tr> <tr style="vertical-align: bottom; background-color: rgb(255, 255, 255);"><td style="font-family: Times New Roman; font-size: 10pt;"> <p style="font-family: "Times New Roman"; font-size: 10pt; font-variant: normal; margin: 0pt 0pt 0pt 27pt;">Total collateral carrying value</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 3px double rgb(0, 0, 0);">$</td><td style="width: 16%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 3px double rgb(0, 0, 0);">276,599</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; border-bottom: 3px double rgb(0, 0, 0); margin-left: 0pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 3px double rgb(0, 0, 0);">$</td><td style="width: 16%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt; border-bottom: 3px double rgb(0, 0, 0);">233,882</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; border-bottom: 3px double rgb(0, 0, 0); margin-left: 0pt;"> </td></tr> <tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"><td style="font-family: Times New Roman; font-size: 10pt;"> <p style="font-family: "Times New Roman"; font-size: 10pt; font-variant: normal; margin: 0pt;">Total short-term borrowed funds</p> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 16%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">83,088</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt;"> </td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">$</td><td style="width: 16%; text-align: right; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;">57,792</td><td style="width: 1%; font-family: Times New Roman; font-size: 10pt; margin-left: 0pt;"> </td></tr> </tbody></table>
CY2023Q1	us-gaap	Carrying Value Of Securities Sold Under Repurchase Agreements And Deposits Received For Securities Loaned CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned	276599000	usd
CY2022Q4	us-gaap	Carrying Value Of Securities Sold Under Repurchase Agreements And Deposits Received For Securities Loaned CarryingValueOfSecuritiesSoldUnderRepurchaseAgreementsAndDepositsReceivedForSecuritiesLoaned	233882000	usd
CY2023Q1	us-gaap	Short Term Borrowings ShortTermBorrowings	83088000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	57792000	usd
CY2023Q1	wabc	Loan Commitments Not Unconditionally Cancellable LoanCommitmentsNotUnconditionallyCancellable	31550000	usd
CY2022Q4	wabc	Loan Commitments Not Unconditionally Cancellable LoanCommitmentsNotUnconditionallyCancellable	31889000	usd
CY2023Q1	wabc	Unfunded Loan Commitments UnfundedLoanCommitments	208051000	usd
CY2022Q4	wabc	Unfunded Loan Commitments UnfundedLoanCommitments	202696000	usd
CY2022Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	950000	usd
CY2023Q1	wabc	Loan Commitments Not Unconditionally Cancellable LoanCommitmentsNotUnconditionallyCancellable	31550000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	40451000	usd
CY2022Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26859000
CY2022Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26870000
CY2023Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	7000
CY2022Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	15000
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26866000
CY2022Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26885000
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.51
CY2022Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84

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wabc20230331_10q_htm.xml	Edgar Link	completed

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$WABC
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2023 Q2 Form 10-Q Financial Statement

#000117184323003090 Filed on May 09, 2023

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$WABC Westamerica Bancorp Stock $wabc

2023 Q2 Form 10-Q Financial Statement

#000117184323003090 Filed on May 09, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WABC
Westamerica Bancorp Stock $wabc