$EWBC
EAST WEST BANCORP INC Stock $ewbc

$ewbc Overview Financials Valuation SEC Filings Company Website

2020 Q1 Form 10-Q Financial Statement

#000106915720000040 Filed on May 08, 2020

Income Statement

Concept	2020 Q1	2019 Q1
Revenue	$449.2M	$463.3M
YoY Change	-3.05%	24.59%
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	$31.19M	$39.50M
YoY Change	-21.04%	32.29%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$86.48M	$100.9M
YoY Change	-14.25%	123.22%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$164.0M	$195.1M
YoY Change	-15.93%	-7.88%
Income Tax	$19.19M	$31.07M
% Of Pretax Income	11.7%	15.92%
Net Earnings	$144.8M	$164.0M
YoY Change	-11.71%	-12.3%
Net Earnings / Revenue	32.24%	35.4%
Basic Earnings Per Share	$1.00	$1.13
Diluted Earnings Per Share	$1.00	$1.12
COMMON SHARES
Basic Shares Outstanding	144.8M shares	145.3M shares
Diluted Shares Outstanding	145.3M shares	145.9M shares

Balance Sheet

Concept	2020 Q1	2019 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$3.080B	$3.785B
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	$115.4M	$124.3M
YoY Change	-7.17%	3.81%
Goodwill	$465.7M	$465.7M
YoY Change	0.0%	0.03%
Intangibles
YoY Change
Long-Term Investments	$199.0M	$197.0M
YoY Change	1.02%	22.36%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$45.95B	$42.09B
YoY Change	9.16%	11.73%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$385.0M	$529.0M
YoY Change	-27.22%	18.08%
Deferred Revenue
YoY Change
Short-Term Debt	$517.0M	$39.55M
YoY Change	1207.21%	30.63%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$385.0M	$529.0M
YoY Change	-27.22%	18.08%
LONG-TERM LIABILITIES
Long-Term Debt	$152.0M	$152.0M
YoY Change	0.0%	-8.98%
Other Long-Term Liabilities	$659.0M	$110.0M
YoY Change	499.09%	26.44%
Total Long-Term Liabilities	$811.0M	$262.0M
YoY Change	209.54%	3.15%
TOTAL LIABILITIES
Total Short-Term Liabilities	$385.0M	$529.0M
Total Long-Term Liabilities	$811.0M	$262.0M
Total Liabilities	$41.05B	$37.50B
YoY Change	9.46%	11.23%
SHAREHOLDERS EQUITY
Retained Earnings	$3.696B	$3.305B
YoY Change	11.82%	20.61%
Common Stock	$167.0K	$166.0K
YoY Change	0.6%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$633.4M	$479.3M
YoY Change	32.17%	5.96%
Treasury Stock Shares	25.66M shares	20.98M shares
Shareholders Equity	$4.903B	$4.592B
YoY Change
Total Liabilities & Shareholders Equity	$45.95B	$42.09B
YoY Change	9.16%	11.67%

Cashflow Statement

Concept	2020 Q1	2019 Q1
OPERATING ACTIVITIES
Net Income	$144.8M	$164.0M
YoY Change	-11.71%	-12.3%
Depreciation, Depletion And Amortization	$31.19M	$39.50M
YoY Change	-21.04%	32.29%
Cash From Operating Activities	$91.70M	$139.2M
YoY Change	-34.14%	-36.09%
INVESTING ACTIVITIES
Capital Expenditures	$916.0K	$3.336M
YoY Change	-72.54%	89.87%
Acquisitions
YoY Change
Other Investing Activities	$1.143M	$729.0K
YoY Change	56.79%	-62.94%
Cash From Investing Activities	-$1.405B	-$118.7M
YoY Change	1084.12%	-88.59%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$146.0M	$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$1.119B	$749.4M
YoY Change	49.33%	-20.65%
NET CHANGE
Cash From Operating Activities	$91.70M	$139.2M
Cash From Investing Activities	-$1.405B	-$118.7M
Cash From Financing Activities	$1.119B	$749.4M
Net Change In Cash	-$181.1M	$783.9M
YoY Change	-123.1%	458.58%
FREE CASH FLOW
Cash From Operating Activities	$91.70M	$139.2M
Capital Expenditures	$916.0K	$3.336M
Free Cash Flow	$90.79M	$135.9M
YoY Change	-33.2%	-37.11%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2020Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001069157
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CY2020Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2019Q4	us-gaap	Assets Assets	44196096000	USD
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CY2020Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	167091420	shares
CY2019Q4	us-gaap	Contract With Customer Asset Gross Noncurrent ContractWithCustomerAssetGrossNoncurrent	0	USD
CY2019Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	0	USD
CY2020Q1	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	0	USD
CY2019Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	19100000	USD
CY2019Q1	ewbc	Dividend Income Investmentsin Federal Home Loan Bankand Federal Reserve Bank Stock DividendIncomeInvestmentsinFederalHomeLoanBankandFederalReserveBankStock	713000	USD
CY2019Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount	0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	465700000	USD
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CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	11080036000	USD
CY2020Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	25656321	shares
CY2020Q1	ewbc	Investmentsin Tax Creditand Other Investments Net InvestmentsinTaxCreditandOtherInvestmentsNet	268330000	USD
CY2019Q1	us-gaap	Interest Expense Other Long Term Debt InterestExpenseOtherLongTermDebt	1758000	USD
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CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	115393000	USD
CY2020Q1	dei	Document Type DocumentType	10-Q
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CY2020Q1	dei	Document Period End Date DocumentPeriodEndDate	2020-03-31
CY2020Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2020Q1	dei	Security12b Title Security12bTitle	Common Stock, $0.001 Par Value
CY2020Q1	dei	Trading Symbol TradingSymbol	EWBC
CY2020Q1	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
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CY2020Q1	dei	Entity File Number EntityFileNumber	000-24939
CY2020Q1	dei	Entity Registrant Name EntityRegistrantName	EAST WEST BANCORP, INC.
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CY2020Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	135 North Los Robles Ave.
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CY2020Q1	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	950000	USD
CY2019Q1	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	915000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Realized Gain Loss Excluding Other Than Temporary Impairment DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment	1529000	USD
CY2019Q1	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1973000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	54049000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25289000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25191000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Realized Gain Loss Excluding Other Than Temporary Impairment DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment	1561000	USD
CY2020Q1	us-gaap	Noninterest Income Other NoninterestIncomeOther	1921000	USD
CY2019Q1	us-gaap	Noninterest Income Other NoninterestIncomeOther	1202000	USD
CY2019Q1	ewbc	Depositrelatedexpenses Depositrelatedexpenses	3504000	USD
CY2020Q1	ewbc	Computer Software Expense ComputerSoftwareExpense	6166000	USD
CY2019Q1	ewbc	Computer Software Expense ComputerSoftwareExpense	6078000	USD
CY2020Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	21119000	USD
CY2020Q1	ewbc	Noninterest Expense Amortizationof Tax Creditand Other Investments NoninterestExpenseAmortizationofTaxCreditandOtherInvestments	17325000	USD
CY2019Q1	ewbc	Noninterest Expense Amortizationof Tax Creditand Other Investments NoninterestExpenseAmortizationofTaxCreditandOtherInvestments	24905000	USD
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	178876000	USD
CY2019Q1	us-gaap	Noninterest Expense NoninterestExpense	186922000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	164010000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	170113000	USD
CY2019Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	189215000	USD
CY2019Q1	us-gaap	Other Noninterest Expense OtherNoninterestExpense	22289000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	195091000	USD
CY2020Q1	us-gaap	Share Based Compensation ShareBasedCompensation	7209000	USD
CY2019Q1	us-gaap	Share Based Compensation ShareBasedCompensation	7444000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19186000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31067000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	144824000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	164024000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	4423974000	USD
CY2019Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	14668000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	164024000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25191000	USD
CY2019Q1	ewbc	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	4443000	USD
CY2019Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-6600000	USD
CY2019Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	33770000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	4591930000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	5017617000	USD
CY2020Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	-97967000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	144824000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25289000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-337000	USD
CY2020Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	145966000	USD
CY2020Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	40475000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	4902985000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	144824000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	164024000	USD
CY2020Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	28000	USD
CY2019Q1	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-406000	USD
CY2020Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	31186000	USD
CY2019Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	39498000	USD
CY2020Q1	ewbc	Accretion Amortizationof Discountand Premiums Net AccretionAmortizationofDiscountandPremiumsNet	4519000	USD
CY2019Q1	ewbc	Accretion Amortizationof Discountand Premiums Net AccretionAmortizationofDiscountandPremiumsNet	4414000	USD
CY2019Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	22579000	USD
CY2020Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	73870000	USD
CY2020Q1	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	950000	USD
CY2019Q1	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	915000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Realized Gain Loss Excluding Other Than Temporary Impairment DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment	1529000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Realized Gain Loss Excluding Other Than Temporary Impairment DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment	1561000	USD
CY2020Q1	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-3000	USD
CY2019Q1	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
CY2020Q1	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	5802000	USD
CY2019Q1	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	2167000	USD
CY2020Q1	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	4657000	USD
CY2019Q1	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	2454000	USD
CY2020Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	973000	USD
CY2019Q1	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1150000	USD
CY2020Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	462766000	USD
CY2019Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	27639000	USD
CY2020Q1	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	304680000	USD
CY2019Q1	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-60806000	USD
CY2020Q1	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-161000	USD
CY2019Q1	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	0	USD
CY2020Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-53121000	USD
CY2019Q1	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-24783000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	91703000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	139241000	USD
CY2020Q1	ewbc	Paymentsfor Proceedsfrom Qualified Affordable Housing Partnershipsand Other Tax Credit Investments PaymentsforProceedsfromQualifiedAffordableHousingPartnershipsandOtherTaxCreditInvestments	27581000	USD
CY2019Q1	ewbc	Paymentsfor Proceedsfrom Qualified Affordable Housing Partnershipsand Other Tax Credit Investments PaymentsforProceedsfromQualifiedAffordableHousingPartnershipsandOtherTaxCreditInvestments	33261000	USD
CY2020Q1	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-115419000	USD
CY2019Q1	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	245375000	USD
CY2020Q1	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	250000000	USD
CY2019Q1	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	0	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	306463000	USD
CY2019Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	151339000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	308620000	USD
CY2019Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	55712000	USD
CY2020Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	987130000	USD
CY2019Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	69805000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	110945000	USD
CY2019Q1	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	92887000	USD
CY2020Q1	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	133185000	USD
CY2019Q1	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	147938000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1116358000	USD
CY2019Q1	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	409930000	USD
CY2020Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	916000	USD
CY2019Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3336000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	295000	USD
CY2019Q1	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	0	USD
CY2020Q1	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	374000	USD
CY2019Q1	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	1005000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1438000	USD
CY2019Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	729000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1405330000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-118681000	USD
CY2020Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1374287000	USD
CY2019Q1	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	800053000	USD
CY2020Q1	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	39962000	USD
CY2019Q1	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-19514000	USD
CY2020Q1	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	0	USD
CY2019Q1	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	300000000	USD
CY2020Q1	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	99999000	USD
CY2019Q1	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	282000000	USD
CY2020Q1	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	289000	USD
CY2019Q1	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	217000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	145966000	USD
CY2019Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	7609000	USD
CY2019Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	14036000	USD
CY2020Q1	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	41358000	USD
CY2019Q1	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	34916000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1119028000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	749370000	USD
CY2020Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13492000	USD
CY2019Q1	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	14018000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-181107000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	783948000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3261149000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3001377000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3080042000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3785325000	USD
CY2020Q1	us-gaap	Interest Paid Net InterestPaidNet	88520000	USD
CY2019Q1	us-gaap	Interest Paid Net InterestPaidNet	97930000	USD
CY2020Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2904000	USD
CY2019Q1	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	303000	USD
CY2020Q1	ewbc	Transferof Portfolioand Leasesto Heldforsale Including Loans Transferredfrom Heldfor Investmentto Branch Assets Heldforsale TransferofPortfolioandLeasestoHeldforsaleIncludingLoansTransferredfromHeldforInvestmenttoBranchAssetsHeldforsale	110223000	USD
CY2019Q1	ewbc	Transferof Portfolioand Leasesto Heldforsale Including Loans Transferredfrom Heldfor Investmentto Branch Assets Heldforsale TransferofPortfolioandLeasestoHeldforsaleIncludingLoansTransferredfromHeldforInvestmenttoBranchAssetsHeldforsale	92228000	USD
CY2020Q1	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	19504000	USD
CY2019Q1	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	USD
CY2020Q1	ewbc	Number Of Wholly Owned Statutory Business Trusts NumberOfWhollyOwnedStatutoryBusinessTrusts	6	trust
CY2020Q1	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0.0	USD
CY2020Q1	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	450000000.0	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	250000000.0	USD
CY2020Q1	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	860000000.0	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	1110000000	USD
CY2020Q1	ewbc	Assets Purchased Under Agreementsto Resell Yield AssetsPurchasedUnderAgreementstoResellYield	0.0254
CY2019Q1	ewbc	Assets Purchased Under Agreementsto Resell Yield AssetsPurchasedUnderAgreementstoResellYield	0.0280
CY2020Q1	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	450000000.0	USD
CY2020Q1	ewbc	Assets Purchased Under Agreementsto Repurchase Interest Rate AssetsPurchasedUnderAgreementstoRepurchaseInterestRate	0.0410
CY2019Q1	ewbc	Assets Purchased Under Agreementsto Repurchase Interest Rate AssetsPurchasedUnderAgreementstoRepurchaseInterestRate	0.0501
CY2020Q1	ewbc	Securities Sold Under Agreements To Repurchase Maturingin Year Three SecuritiesSoldUnderAgreementsToRepurchaseMaturinginYearThree	150000000.0	USD
CY2020Q1	ewbc	Securities Sold Under Agreements To Repurchase Maturingin Year Four SecuritiesSoldUnderAgreementsToRepurchaseMaturinginYearFour	300000000.0	USD
CY2020Q1	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	860000000	USD
CY2020Q1	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	0	USD
CY2020Q1	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	860000000	USD
CY2020Q1	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnSecurities	859842000	USD
CY2020Q1	us-gaap	Securities Purchased Under Agreements To Resell Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	158000	USD
CY2020Q1	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	450000000	USD
CY2020Q1	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0	USD
CY2020Q1	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	450000000	USD
CY2020Q1	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	441246000	USD
CY2020Q1	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	8754000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	1110000000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Liability SecuritiesPurchasedUnderAgreementsToResellLiability	250000000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell SecuritiesPurchasedUnderAgreementsToResell	860000000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Collateral Obligation To Return Securities SecuritiesPurchasedUnderAgreementsToResellCollateralObligationToReturnSecurities	856058000	USD
CY2019Q4	us-gaap	Securities Purchased Under Agreements To Resell Amount Offset Against Collateral SecuritiesPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	3942000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	450000000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	250000000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	200000000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	200000000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	0	USD
CY2020Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3660413000	USD
CY2020Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	84357000	USD
CY2020Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	48827000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3695943000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3320648000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1561000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	19805000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	23239000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3317214000	USD
CY2019Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	151339000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1529000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	765558000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	306463000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	45457000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	40617000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	3370000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	806175000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	48827000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1388661000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	18990000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	351048000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	4249000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1739709000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	23239000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	56	security
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	101	security
CY2020Q1	ewbc	Tax Expenseon Saleof Availablefor Sale Debt Investment Securities TaxExpenseonSaleofAvailableforSaleDebtInvestmentSecurities	452000	USD
CY2019Q1	ewbc	Tax Expenseon Saleof Availablefor Sale Debt Investment Securities TaxExpenseonSaleofAvailableforSaleDebtInvestmentSecurities	461000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	588392000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	590461000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	314312000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	319938000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	240566000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	252057000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	2517143000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	2533487000	USD
CY2020Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	3660413000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	3695943000	USD
CY2020Q1	us-gaap	Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue	742400000	USD
CY2019Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue	479400000	USD
CY2020Q1	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	58563000	USD
CY2019Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	58330000	USD
CY2020Q1	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	20182000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	20250000	USD
CY2020Q1	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	78745000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	78580000	USD
CY2020Q1	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	834204000	USD
CY2020Q1	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	658515000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	330316000	USD
CY2019Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	256528000	USD
CY2020Q1	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	158674000	USD
CY2020Q1	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	158674000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	121561000	USD
CY2019Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	121561000	USD
CY2020Q1	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	20100000	USD
CY2020Q1	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	84427000	USD
CY2019Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	3758000	USD
CY2019Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	38238000	USD
CY2020Q1	us-gaap	Derivative Assets DerivativeAssets	655430000	USD
CY2020Q1	us-gaap	Derivative Liabilities DerivativeLiabilities	415414000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	204997000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	96729000	USD
CY2020Q1	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	20100000	USD
CY2020Q1	us-gaap	Derivative Assets DerivativeAssets	655430000	USD
CY2020Q1	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	834204000	USD
CY2020Q1	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	158674000	USD
CY2020Q1	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	29103000	USD
CY2020Q1	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	626327000	USD
CY2020Q1	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	158674000	USD
CY2020Q1	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	84427000	USD
CY2020Q1	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	658515000	USD
CY2020Q1	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	182474000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	34778539000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	557003000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	358287000	USD
CY2020Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	35893393000	USD
CY2020Q1	us-gaap	Derivative Liabilities DerivativeLiabilities	415414000	USD
CY2020Q1	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	232940000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	330316000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	121561000	USD
CY2019Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	3758000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	204997000	USD
CY2019Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	204997000	USD
CY2019Q4	ewbc	Derivative Liability Subject To Master Netting Arrangements Gross Amounts Recognized DerivativeLiabilitySubjectToMasterNettingArrangementsGrossAmountsRecognized	256528000	USD
CY2019Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	121561000	USD
CY2019Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	38238000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	96729000	USD
CY2019Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	79619000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	17110000	USD
CY2020Q1	ewbc	Derivative Assets Subject To Master Netting Arrangements Gross Amounts Recognized DerivativeAssetsSubjectToMasterNettingArrangementsGrossAmountsRecognized	831900000	USD
CY2019Q4	ewbc	Derivative Assets Subject To Master Netting Arrangements Gross Amounts Recognized DerivativeAssetsSubjectToMasterNettingArrangementsGrossAmountsRecognized	328700000	USD
CY2020Q1	us-gaap	Derivative Asset Not Subject To Master Netting Arrangement DerivativeAssetNotSubjectToMasterNettingArrangement	2300000	USD
CY2019Q4	us-gaap	Derivative Asset Not Subject To Master Netting Arrangement DerivativeAssetNotSubjectToMasterNettingArrangement	1600000	USD
CY2020Q1	ewbc	Derivative Liability Subject To Master Netting Arrangements Gross Amounts Recognized DerivativeLiabilitySubjectToMasterNettingArrangementsGrossAmountsRecognized	657600000	USD
CY2019Q4	ewbc	Derivative Liability Subject To Master Netting Arrangements Gross Amounts Recognized DerivativeLiabilitySubjectToMasterNettingArrangementsGrossAmountsRecognized	256500000	USD
CY2020Q1	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement DerivativeLiabilityNotSubjectToMasterNettingArrangement	931000	USD
CY2019Q4	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement DerivativeLiabilityNotSubjectToMasterNettingArrangement	20000	USD
CY2020Q1	ewbc	Derivative Cash Collateral Received Including Amount Offsetby Fair Value Assetsand Excess Cash Amount DerivativeCashCollateralReceivedIncludingAmountOffsetbyFairValueAssetsandExcessCashAmount	20100000	USD
CY2019Q4	ewbc	Derivative Cash Collateral Received Including Amount Offsetby Fair Value Assetsand Excess Cash Amount DerivativeCashCollateralReceivedIncludingAmountOffsetbyFairValueAssetsandExcessCashAmount	3800000	USD
CY2020Q1	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	20100000	USD
CY2019Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	3800000	USD
CY2020Q1	ewbc	Derivative Cash Collateral Posted Against Derivative Liabilities Including Amount Offsetthe Derivative Fair Value Liabilitiesand Excess Cash Amount DerivativeCashCollateralPostedAgainstDerivativeLiabilitiesIncludingAmountOffsettheDerivativeFairValueLiabilitiesandExcessCashAmount	89800000	USD
CY2019Q4	ewbc	Derivative Cash Collateral Posted Against Derivative Liabilities Including Amount Offsetthe Derivative Fair Value Liabilitiesand Excess Cash Amount DerivativeCashCollateralPostedAgainstDerivativeLiabilitiesIncludingAmountOffsettheDerivativeFairValueLiabilitiesandExcessCashAmount	43000000.0	USD
CY2020Q1	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	84400000	USD
CY2019Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	38200000	USD
CY2020Q1	us-gaap	Notes Receivable Net NotesReceivableNet	35336390000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	34420252000	USD
CY2020Q1	ewbc	Financing Receivable Accrued Interestbefore Allowancefor Credit Loss FinancingReceivableAccruedInterestbeforeAllowanceforCreditLoss	117600000	USD
CY2019Q4	ewbc	Financing Receivable Accrued Interestbefore Allowancefor Credit Loss FinancingReceivableAccruedInterestbeforeAllowanceforCreditLoss	121800000	USD
CY2020Q1	ewbc	Net Reductionto Interest Income NetReductiontoInterestIncome	-366000	USD
CY2020Q1	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	0	USD
CY2020Q1	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	23110000000	USD
CY2019Q4	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	22430000000	USD
CY2020Q1	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"/><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Credit Quality Indicators</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">All loans are subject to the Company’s credit review and monitoring. For the commercial portfolio, loans are risk rated based on an analysis of the borrower’s current payment performance or delinquency, repayment sources, financial and liquidity factors, including industry and geographic considerations. For the majority of the consumer portfolio, payment performance or delinquency is the driving indicator for the risk ratings.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">For the Company’s internal credit risk ratings, each individual loan is given a risk rating of 1 through 10. Loans risk rated 1 through 5 are assigned an internal risk rating of “Pass”, with loans risk rated 1 being fully secured by cash or U.S. government securities. Pass loans have sufficient sources of repayment to repay the loan in full, in accordance with all terms and conditions. Loans assigned a risk rating of 6 have potential weaknesses that warrant closer attention by management; these are assigned an internal risk rating of “Special Mention”. Loans assigned a risk rating of 7 or 8 have well-defined weaknesses that may jeopardize the full and timely repayment of the loan; these are assigned an internal risk rating of “Substandard”. Loans assigned a risk rating of 9 have insufficient sources of repayment and a high probability of loss; these are assigned an internal risk rating of “Doubtful”. Loans assigned a risk rating of 10 are uncollectable and of such little value that they are no longer considered bankable assets; these are assigned an internal risk rating of “Loss”. The loans’ internal risk ratings are reviewed routinely and adjusted based on changes in the borrowers’ financial status and the loans’ collectability. These risk ratings were updated as of March 31, 2020.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2020Q1	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	2919900000	USD
CY2020Q1	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	9072212000	USD
CY2020Q1	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	5649484000	USD
CY2020Q1	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	3467167000	USD
CY2020Q1	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	1720010000	USD
CY2020Q1	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	4122520000	USD
CY2020Q1	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	8777087000	USD
CY2020Q1	ewbc	Financing Receivable Revolving Convertedto Term Loans FinancingReceivableRevolvingConvertedtoTermLoans	165013000	USD
CY2020Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	35893393000	USD
CY2020Q1	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	99607000	USD
CY2020Q1	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	126668000	USD
CY2020Q1	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	35667118000	USD
CY2020Q1	us-gaap	Notes Receivable Gross NotesReceivableGross	35893393000	USD
CY2020Q1	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	87404000	USD
CY2020Q1	ewbc	Financing Receivable Foreclosed Assets FinancingReceivableForeclosedAssets	24300000	USD
CY2019Q4	ewbc	Financing Receivable Foreclosed Assets FinancingReceivableForeclosedAssets	1300000	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	3	loan
CY2020Q1	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	16604000	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	15735000	USD
CY2020Q1	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	98000	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	15735000	USD
CY2020Q1	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
CY2020Q1	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	2300000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	2200000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Allowance for Credit Losses</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The allowance for credit losses includes the allowance for loan losses and the allowance for unfunded credit commitments. The Company’s Allowance for Credit Losses Committee reviews and approves the allowance for credit losses on a quarterly basis. </span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"/><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Allowance for Collectively Evaluated Loans</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">For loans collectively assessed, the Company’s methodology to determine the appropriate allowance for loan losses is based on quantitative credit models, supplemented by qualitative adjustments. The Company utilize a lifetime loss rate model for the C&I portfolio; probability of default (“PD”) and loss given default (“LGD”) models for all commercial and consumer real estate loan portfolios, and a loss rate approach for other consumer loans.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Factors incorporated into the qualitative adjustments are designed to capture economic, portfolio, operational and segmentation risks not captured by the quantitative credit models. These factors include, but are not limited to, current and forecast economic or market conditions; risks stemming from borrowers’ exposure to or dependence on the U.S. consumer market; industry specific risks inherent in the Company’s loan portfolio, such as oil price fluctuations or falling oil consumption; profiles of various loan segments; portfolio concentrations by loan type, industry, and geography; loan growth trends; internal credit risk ratings; historical loss experience; current delinquency and problem loan trends, and collateral values. The evaluation is inherently subjective, as it requires numerous estimates and judgments that are susceptible to revision as more information becomes available. To the extent actual results differ from estimates or management’s judgment, the allowance for loan losses may be greater or less than future charge-offs.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">For the </span><span style="font-family:inherit;font-size:10pt;">three months ended March 31, 2020</span><span style="font-family:inherit;font-size:10pt;">, there were no changes to the reasonable and supportable forecast period, and reversion to historical loss experience method. The forecasts of macroeconomic variables were updated to include the impact of the COVID-19 pandemic, oil price declines and other assumptions. The Company uses a third-party economic forecast to estimate the expected credit losses in its quantitative credit models. The forecast uses three economic scenarios including a base forecast representing management's view of the most likely outcome and equally-probable downside and upside scenarios reflecting possible worsening and improving economic conditions, respectively. The economic outlook deteriorated towards the end of the quarter ended March 31, 2020, reflecting the effects of the ongoing COVID-19 pandemic. To reflect the sudden sharp recession caused by the COVID-19 global pandemic, U.S. monetary and fiscal responses to the outbreak, oil price declines and other assumptions, the forecast utilized to estimate expected credit losses was updated in late March 2020. Unemployment rate, which is a key macroeconomic variable for the quantitative models, is projected to significantly spike in the second quarter of 2020 and begin a slower recovery but remain at an elevated level during the second half of 2020. The allowance for credit losses at March 31, 2020 also included qualitative adjustments for certain industry sectors, such as the oil and gas loan portfolio that the Company views as higher risk, where quantitative models may not have captured the additional exposure related to such industry sectors.</span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"/><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Allowance for Loan Losses for the Commercial Loan Portfolio</span><span style="font-family:inherit;font-size:10pt;font-weight:bold;"> </span><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">— </span><span style="font-family:inherit;font-size:10pt;">The Company’s C&I lifetime loss rate model estimates credit losses by estimating a loss rate expected over the life of a loan. This loss rate is applied to the amortized cost basis, excluding accrued interest receivables, to determine expected credit losses. This model incorporates portfolio prepayment rate and utilization rates assumptions; loan-specific risk characteristics such as internal credit risk rating, industry segment, time-to-maturity, size and credit spread at origination, and the economic and market conditions. Each of these components, along with economic forecast information through the reasonable and supportable period, are embedded in the forecasted lifetime loss rate. The lifetime loss rate model’s reasonable and supportable period spans eight quarters, thereafter immediately reverting to the historical average loss rate, expressed implicitly through the loan-level lifetime loss rate. </span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company’s CRE PD/LGD models estimate the probability that a loan will default and, in the event of default, estimate the expected credit losses upon default. The product of the PD and LGD determines the Company’s current expected credit losses. In addition to the Company’s macroeconomic outlook, these models also incorporate prepayment estimates, historical loss rates, loan duration and amortization terms, interest rates, property type, and the geographic locations of the properties collateralizing the loans. The PD/LGD model assumptions and variable inputs span the entire contractual life of the loans, adjusted for expected prepayments. After a reasonable and supportable period, the forecast of future economic conditions reverts to long-run historical economic trends. The loan-specific variables apply over the lifetime of a loan.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">In order to estimate the life of a loan under both models, the contractual term of the loan is adjusted for estimated prepayments, which are based on historical prepayment experience. </span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company’s macroeconomic outlook is a key driver in the commercial loan portfolio. The Company uses numerous key macroeconomic variables within its forecasts, including unemployment, real GDP and U.S. Treasury rates. The macroeconomic outlook also considers national and regional personal income, sales, employment and financial indicators that impact discrete commercial loan industry segments. The Company utilizes a probability-weighted three-scenario forecast approach to estimate the allowance for credit losses.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">To the extent that information relevant to the collectability of a loan is available and not already captured by the quantitative models, the Company utilizes qualitative factors to adjust the estimate. These factors include, but are not limited to, operational risks resulting from the quality of the Company’s internal loan ratings; portfolio risks such as higher than normal growth trends, delinquencies and levels of classified loans; industry-specific risks inherent in the Company’s portfolio, and other risks borne out of geopolitical, environmental, or natural disaster events specific to the Company’s portfolio, which are not otherwise captured by the quantitative models.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"/><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Allowance for Loan Losses for the Consumer Loan Portfolio — </span><span style="font-family:inherit;font-size:10pt;">For single-family residential and HELOC loans, PG/LGD model assumptions and variable inputs span the entire contractual life of the loans, adjusted for expected prepayments. After a reasonable and supportable period, the forecast of future economic conditions reverts to long- run historical economic trends. The loan-specific variables apply over the lifetime of a loan. In addition to the consideration of the Company’s macroeconomic outlook, the PD/LGD model also incorporates prepayment estimates, historical loss rates, and loan-specific risk characteristics such as the borrower’s FICO score, loan term, interest rates, property purpose and value, and the geographic locations of the properties collateralizing the loans.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">For other consumer loans, the Company uses a loss rate approach. In order to estimate the life of a loan, the contractual term of the loan is adjusted for estimated prepayments, which are based on historical prepayment experience.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The Company’s macroeconomic outlook is a key driver in the residential mortgage portfolio. The Company uses several macroeconomic variables, including unemployment rate and home price index, for its residential mortgage portfolio at the national, state and Metropolitan Statistical Area level. The macroeconomic outlook takes into account national and regional personal income, employment and financial indicators impacting the residential loans industry. For other consumer loans, the Company qualitatively adjusts the expected credit loss using real GDP, unemployment, U.S. Treasury Spread and the S&P 500 index. The Company utilizes a probability-weighted three-scenario forecast approach to estimate the allowance for credit losses.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Individually Assessed Loans</span><span style="font-family:inherit;font-size:10pt;font-weight:bold;"> </span><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">—</span><span style="font-family:inherit;font-size:10pt;font-weight:bold;"> </span><span style="font-family:inherit;font-size:10pt;">When a loan no longer shares similar risk characteristics with other loans, such as in the case for certain nonaccrual or TDR loans, the Company estimates the allowance for loan losses on an individual loan basis. The allowance for loan losses for individually evaluated loans is measured as the difference between the recorded value of the loans and their fair value. For loans evaluated individually, the Company uses one of three different asset valuation measurement methods: (1) the present value of expected future cash flows; (2) the fair value of collateral less costs to sell; (3) the loan's observable market price. If an individually evaluated loan is determined to be collateral dependent, the Company applies the fair value of the collateral less costs to sell method. If an individually evaluated loan is determined to not be collateral dependent, the Company uses the present value of future cash flows or the observable market value of the loan.</span></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"/><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Collateral-Dependent Loans — </span><span style="font-family:inherit;font-size:10pt;">When a loan is collateral dependent, the allowance is measured on an individual loan basis and is limited to the difference between the recorded value and fair value of the collateral less cost of disposal or sale. As of </span><span style="font-family:inherit;font-size:10pt;">March 31, 2020</span><span style="font-family:inherit;font-size:10pt;">, collateral dependent commercial and consumer loans totaled </span><span style="font-family:inherit;font-size:10pt;"><span>$34.6 million</span></span><span style="font-family:inherit;font-size:10pt;"> and </span><span style="font-family:inherit;font-size:10pt;"><span>$17.8 million</span></span><span style="font-family:inherit;font-size:10pt;">, respectively. The Company's commercial collateral-dependent loans were secured by real estate or business properties. The Company's consumer collateral dependent loans were all residential mortgage loans, secured by the underlying real estate. As of </span><span style="font-family:inherit;font-size:10pt;">March 31, 2020</span><span style="font-family:inherit;font-size:10pt;">, the collateral value of the properties securing each of these collateral dependent loans, net of selling costs, exceeded the amortized cost of the individual loans, except for one C&I loan, against which there was a recorded allowance of </span><span style="font-family:inherit;font-size:10pt;"><span>$416 thousand</span></span><span style="font-family:inherit;font-size:10pt;">. For the </span><span style="font-family:inherit;font-size:10pt;">three months ended March 31, 2020</span><span style="font-family:inherit;font-size:10pt;">, there was no significant deterioration or changes in the collaterals securing these loans.</span></div>
CY2020Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	73870000	USD
CY2019Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	317894000	USD
CY2019Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	22579000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	557000000.0	USD
CY2020Q1	ewbc	Financing Receivable Allowancefor Credit Loss Percentageof Loans Heldfor Investment FinancingReceivableAllowanceforCreditLossPercentageofLoansHeldforInvestment	0.0155
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	358300000	USD
CY2019Q4	ewbc	Financing Receivable Allowancefor Credit Loss Percentageof Loans Heldfor Investment FinancingReceivableAllowanceforCreditLossPercentageofLoansHeldforInvestment	0.0103
CY2019Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	317900000	USD
CY2019Q1	ewbc	Financing Receivable Allowancefor Credit Loss Percentageof Loans Heldfor Investment FinancingReceivableAllowanceforCreditLossPercentageofLoansHeldforInvestment	0.0097
CY2019Q1	ewbc	Provisionfor Loan Leaseand Other Losses Period Increase Decrease ProvisionforLoanLeaseandOtherLossesPeriodIncreaseDecrease	73900000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	358287000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	34778539000	USD
CY2020Q1	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	8384000	USD
CY2020Q1	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	110223000	USD
CY2020Q1	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	114865000	USD
CY2020Q1	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	133180000	USD
CY2019Q1	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	92228000	USD
CY2019Q1	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	94743000	USD
CY2019Q1	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	147814000	USD
CY2020Q1	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	0	USD
CY2019Q1	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	73000	USD
CY2020Q1	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	950000	USD
CY2019Q1	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	915000	USD
CY2020Q1	ewbc	Minimum Compliance Period To Fully Utilize Tax Credits MinimumCompliancePeriodToFullyUtilizeTaxCredits	P15Y
CY2020Q1	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	198653000	USD
CY2019Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	207037000	USD
CY2020Q1	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	77487000	USD
CY2019Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	80294000	USD
CY2020Q1	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	11031000	USD
CY2019Q1	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	11826000	USD
CY2019Q1	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	8897000	USD
CY2020Q1	ewbc	Investmentsin Tax Creditand Other Investments Net InvestmentsinTaxCreditandOtherInvestmentsNet	268330000	USD
CY2019Q4	ewbc	Investmentsin Tax Creditand Other Investments Net InvestmentsinTaxCreditandOtherInvestmentsNet	254140000	USD
CY2020Q1	ewbc	Other Tax Credit Investments Commitment OtherTaxCreditInvestmentsCommitment	121604000	USD
CY2019Q4	ewbc	Other Tax Credit Investments Commitment OtherTaxCreditInvestmentsCommitment	113515000	USD
CY2020Q1	ewbc	Noninterest Expense Amortizationof Tax Creditand Other Investments NoninterestExpenseAmortizationofTaxCreditandOtherInvestments	17300000	USD
CY2019Q1	ewbc	Noninterest Expense Amortizationof Tax Creditand Other Investments NoninterestExpenseAmortizationofTaxCreditandOtherInvestments	24900000	USD
CY2020Q1	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	38000	USD
CY2019Q1	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	392000	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	19100000	USD
CY2020Q1	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount	0	USD
CY2020Q1	ewbc	Tax Credit Investments Pretax Impairment Charge Recovery TaxCreditInvestmentsPretaxImpairmentChargeRecovery	150000	USD
CY2020Q1	ewbc	Numberof Impaired Tax Credit Investments NumberofImpairedTaxCreditInvestments	1	credit
CY2019Q1	ewbc	Tax Credit Investments Pretax Impairment Charge Recovery TaxCreditInvestmentsPretaxImpairmentChargeRecovery	0	USD
CY2020Q1	us-gaap	Goodwill Goodwill	465700000	USD
CY2020Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020Q1	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	USD
CY2018Q4	us-gaap	Goodwill Goodwill	465547000	USD
CY2019Q1	us-gaap	Goodwill Goodwill	465697000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020Q1	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020Q1	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1863072000	USD
CY2020Q1	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	4914602000	USD
CY2019Q4	us-gaap	Unused Commitments To Extend Credit UnusedCommitmentsToExtendCredit	5330211000	USD
CY2019Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1860414000	USD
CY2020Q1	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	1860000000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	15804000	USD
CY2020Q1	ewbc	Other Sources Of Noninterest Income OtherSourcesOfNoninterestIncome	38245000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	54049000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	13280000	USD
CY2019Q1	ewbc	Other Sources Of Noninterest Income OtherSourcesOfNoninterestIncome	28851000	USD
CY2019Q1	us-gaap	Noninterest Income NoninterestIncome	42131000	USD
CY2020Q1	us-gaap	Contract With Customer Asset Gross Noncurrent ContractWithCustomerAssetGrossNoncurrent	0	USD
CY2020Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0	shares
CY2020Q1	us-gaap	Share Based Compensation ShareBasedCompensation	7209000	USD
CY2019Q1	us-gaap	Share Based Compensation ShareBasedCompensation	7444000	USD
CY2020Q1	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	-1566000	USD
CY2019Q1	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4707000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	144824000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	164024000	USD
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	144814000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	145256000	shares
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.00
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.13
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	144824000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	164024000	USD
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	144814000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	145256000	shares
CY2020Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	471000	shares
CY2019Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	665000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	145285000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	145921000	shares
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.12
CY2020Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	500000000.0	USD
CY2020Q1	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	4471682	shares
CY2020Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	32.64
CY2020Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	146000000.0	USD
CY2019Q1	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	26291000	USD
CY2019Q1	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	1100000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25191000	USD
CY2020Q1	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	26366000	USD
CY2020Q1	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	1077000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25289000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	37198000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	11909000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25289000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	32557000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	7366000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	25191000	USD
CY2020Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020Q1	ewbc	Numberof Core Segment NumberofCoreSegment	2	segment
CY2020Q1	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	362707000	USD
CY2020Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	73870000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	54049000	USD
CY2020Q1	us-gaap	Noninterest Expense NoninterestExpense	178876000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	164010000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	144824000	USD
CY2020Q1	us-gaap	Assets Assets	45948545000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	362461000	USD
CY2019Q1	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	22579000	USD
CY2019Q1	us-gaap	Noninterest Income NoninterestIncome	42131000	USD
CY2019Q1	us-gaap	Noninterest Expense NoninterestExpense	186922000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	195091000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	164024000	USD
CY2019Q1	us-gaap	Assets Assets	42091433000	USD

Files In Submission

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$EWBC
EAST WEST BANCORP INC Stock $ewbc

2020 Q1 Form 10-Q Financial Statement

#000106915720000040 Filed on May 08, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EWBC EAST WEST BANCORP INC Stock $ewbc

2020 Q1 Form 10-Q Financial Statement

#000106915720000040 Filed on May 08, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EWBC
EAST WEST BANCORP INC Stock $ewbc