$EWBC
EAST WEST BANCORP INC Stock $ewbc

$ewbc Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000106915723000016 Filed on February 27, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$835.5M		$2.321B
YoY Change	93.39%		43.4%
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	$32.57M	$77.87M	$159.9M
YoY Change	22.64%	92.75%	1.95%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$235.6M		$275.4M
YoY Change	1335.46%		215.9%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$421.4M	$388.3M	$1.412B
YoY Change	41.45%	40.14%	33.63%
Income Tax	$98.95M	$51.56M	$283.6M
% Of Pretax Income	23.48%	13.28%	20.09%
Net Earnings	$322.4M	$336.8M	$1.128B
YoY Change	35.68%	54.62%	29.22%
Net Earnings / Revenue	38.59%		48.6%
Basic Earnings Per Share	$2.28		$7.98
Diluted Earnings Per Share	$2.27	$2.369M	$7.917M
COMMON SHARES
Basic Shares Outstanding	141.0M shares	140.9M shares	141.3M shares
Diluted Shares Outstanding	141.9M shares		142.5M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$5.934B	$3.482B
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	$103.1M	$103.7M	$103.7M
YoY Change	7.52%	6.56%	-47.1%
Goodwill	$465.7M	$465.7M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$741.4M	$763.3M	$763.3M
YoY Change	21.94%	163.19%	163.19%
Other Assets			$529.5M
YoY Change			142.9%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$67.24B	$64.11B	$64.11B
YoY Change	8.04%	5.33%	5.32%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$1.546B	$1.707B	$1.707B
YoY Change	44.08%	73.86%	73.86%
Deferred Revenue
YoY Change
Short-Term Debt	$4.500B	$300.0M	$300.0M
YoY Change	1400.0%	0.0%	0.0%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$6.046B	$1.707B	$1.707B
YoY Change	463.55%	73.86%	73.86%
LONG-TERM LIABILITIES
Long-Term Debt	$152.5M	$152.4M	$152.4M
YoY Change	0.16%	0.26%	0.26%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$152.5M	$152.4M	$152.4M
YoY Change	0.16%	0.26%	0.26%
TOTAL LIABILITIES
Total Short-Term Liabilities	$6.046B	$1.707B	$1.707B
Total Long-Term Liabilities	$152.5M	$152.4M	$152.4M
Total Liabilities	$60.94B	$58.13B	$58.13B
YoY Change	7.78%	5.62%	5.62%
SHAREHOLDERS EQUITY
Retained Earnings	$5.832B	$5.583B
YoY Change	19.91%	19.19%
Common Stock	$169.0K	$168.0K
YoY Change	0.6%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$6.309B	$5.985B	$5.985B
YoY Change
Total Liabilities & Shareholders Equity	$67.24B	$64.11B	$64.11B
YoY Change	8.04%	5.33%	5.32%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$322.4M	$336.8M	$1.128B
YoY Change	35.68%	54.62%	29.22%
Depreciation, Depletion And Amortization	$32.57M	$77.87M	$159.9M
YoY Change	22.64%	92.75%	1.95%
Cash From Operating Activities	$222.9M	$449.6M	$2.066B
YoY Change	-22.03%	6.39%	76.82%
INVESTING ACTIVITIES
Capital Expenditures		$0.00	$50.00M
YoY Change		-100.0%	730.98%
Acquisitions
YoY Change
Other Investing Activities	$6.501M	-$332.6M	$7.720M
YoY Change	135.71%	-74.29%	-934.59%
Cash From Investing Activities	-$632.8M	-$332.6M	-$4.583B
YoY Change	-62.39%	-74.4%	-49.73%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$2.857B	1.195B	$2.114B
YoY Change	114.57%	-1846.53%	-73.02%
NET CHANGE
Cash From Operating Activities	$222.9M	449.6M	$2.066B
Cash From Investing Activities	-$632.8M	-332.6M	-$4.583B
Cash From Financing Activities	$2.857B	1.195B	$2.114B
Net Change In Cash	$2.452B	1.312B	-$431.2M
YoY Change	-3917.87%	-238.79%	310.48%
FREE CASH FLOW
Cash From Operating Activities	$222.9M	$449.6M	$2.066B
Capital Expenditures		$0.00	$50.00M
Free Cash Flow		$449.6M	$2.016B
YoY Change		4.9%	73.44%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001069157
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	us-gaap	Fair Value Asset Recurring Basis Still Held Unrealized Gain Loss Statement Of Income Extensible List FairValueAssetRecurringBasisStillHeldUnrealizedGainLossStatementOfIncomeExtensibleList	http://www.eastwestbank.com/20221231#Lendingfees
CY2022Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2022#DebtSecuritiesAvailableForSaleExcludingAccruedInterest
CY2022Q4	us-gaap	Derivative Liability Statement Of Financial Position Extensible Enumeration DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2022#AccruedLiabilitiesAndOtherLiabilities
CY2021Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2022#DebtSecuritiesAvailableForSaleExcludingAccruedInterest
CY2021Q4	us-gaap	Derivative Liability Statement Of Financial Position Extensible Enumeration DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2022#AccruedLiabilitiesAndOtherLiabilities
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2022#AccountingStandardsUpdate201613Member
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2022#AccountingStandardsUpdate201613Member
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	000-24939
CY2022	dei	Entity Registrant Name EntityRegistrantName	EAST WEST BANCORP, INC.
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	95-4703316
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	135 North Los Robles Ave.
CY2022	dei	Entity Address Address Line2 EntityAddressAddressLine2	7th Floor
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Pasadena
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	91101
CY2022	dei	City Area Code CityAreaCode	626
CY2022	dei	Local Phone Number LocalPhoneNumber	768-6000
CY2022	dei	Security12b Title Security12bTitle	Common stock, par value $0.001 per share
CY2022	dei	Trading Symbol TradingSymbol	EWBC
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	9058196758	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	141003685	shares
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	534980000	usd
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CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	2946804000	usd
CY2021Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	3385618000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3481784000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3912935000	usd
CY2022Q4	ewbc	Interest Bearing Deposits With Banks InterestBearingDepositsWithBanks	139021000	usd
CY2021Q4	ewbc	Interest Bearing Deposits With Banks InterestBearingDepositsWithBanks	736492000	usd
CY2022Q4	ewbc	Assets Purchased Under Agreements To Resell AssetsPurchasedUnderAgreementsToResell	792192000	usd
CY2021Q4	ewbc	Assets Purchased Under Agreements To Resell AssetsPurchasedUnderAgreementsToResell	2353503000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	6879225000	usd
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CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	9965353000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2455171000	usd
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CY2021Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAmortizedCostAfterAllowanceForCreditLoss	0	usd
CY2022Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	25644000	usd
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	635000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	595645000	usd
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CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	47606785000	usd
CY2021Q4	us-gaap	Notes Receivable Net NotesReceivableNet	41152202000	usd
CY2022Q4	ewbc	Investments In Qualified Affordable Housing Partnerships Tax Credit And Other Investments Assets Total InvestmentsInQualifiedAffordableHousingPartnershipsTaxCreditAndOtherInvestmentsAssetsTotal	763256000	usd
CY2021Q4	ewbc	Investments In Qualified Affordable Housing Partnerships Tax Credit And Other Investments Assets Total InvestmentsInQualifiedAffordableHousingPartnershipsTaxCreditAndOtherInvestmentsAssetsTotal	628263000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	148126000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	139358000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	89191000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	97302000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	465697000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	465697000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	103681000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	98632000	usd
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CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	22845464000	usd
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	34916759000	usd
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	30505068000	usd
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CY2022Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	0	usd
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CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	300000000	usd
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CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	105534000	usd
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CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
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CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	167790645	shares
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CY2022	ewbc	Dividend Income Investmentsin Federal Home Loan Bankand Federal Reserve Bank Stock DividendIncomeInvestmentsinFederalHomeLoanBankandFederalReserveBankStock	3144000	usd
CY2021	ewbc	Dividend Income Investmentsin Federal Home Loan Bankand Federal Reserve Bank Stock DividendIncomeInvestmentsinFederalHomeLoanBankandFederalReserveBankStock	2081000	usd
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CY2022	us-gaap	Interest Expense Securities Sold Under Agreements To Repurchase InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase	14362000	usd
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CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	73500000	usd
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CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1972381000	usd
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1566571000	usd
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	1166540000	usd
CY2022	ewbc	Lendingfees Lendingfees	79208000	usd
CY2021	ewbc	Lendingfees Lendingfees	77704000	usd
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CY2021	ewbc	Depositaccountfees Depositaccountfees	71261000	usd
CY2020	ewbc	Depositaccountfees Depositaccountfees	48148000	usd
CY2022	ewbc	Interestratecontractsandotherderivativeincome Interestratecontractsandotherderivativeincome	29057000	usd
CY2021	ewbc	Interestratecontractsandotherderivativeincome Interestratecontractsandotherderivativeincome	22913000	usd
CY2020	ewbc	Interestratecontractsandotherderivativeincome Interestratecontractsandotherderivativeincome	31685000	usd
CY2022	ewbc	Foreignexchangeincome Foreignexchangeincome	48158000	usd
CY2021	ewbc	Foreignexchangeincome Foreignexchangeincome	48977000	usd
CY2020	ewbc	Foreignexchangeincome Foreignexchangeincome	22370000	usd
CY2022	ewbc	Wealthmanagementfees Wealthmanagementfees	27565000	usd
CY2021	ewbc	Wealthmanagementfees Wealthmanagementfees	25751000	usd
CY2020	ewbc	Wealthmanagementfees Wealthmanagementfees	17494000	usd
CY2022	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	6411000	usd
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	8909000	usd
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	4501000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss Excluding Other Than Temporary Impairment DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment	1306000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss Excluding Other Than Temporary Impairment DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment	1568000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss Excluding Other Than Temporary Impairment DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment	12299000	usd
CY2022	us-gaap	Noninterest Income Other NoninterestIncomeOther	7037000	usd
CY2021	us-gaap	Noninterest Income Other NoninterestIncomeOther	16852000	usd
CY2020	us-gaap	Noninterest Income Other NoninterestIncomeOther	10641000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	11489000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	11960000	usd
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	13567000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	298666000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	285895000	usd
CY2020	us-gaap	Noninterest Income NoninterestIncome	235547000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	477635000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	433728000	usd
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	404071000	usd
CY2022	us-gaap	Occupancy Net OccupancyNet	62501000	usd
CY2021	us-gaap	Occupancy Net OccupancyNet	62996000	usd
CY2020	us-gaap	Occupancy Net OccupancyNet	66489000	usd
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	19449000	usd
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	17563000	usd
CY2020	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	15128000	usd
CY2022	ewbc	Deposit Account Expense DepositAccountExpense	25508000	usd
CY2021	ewbc	Deposit Account Expense DepositAccountExpense	16152000	usd
CY2020	ewbc	Deposit Account Expense DepositAccountExpense	13530000	usd
CY2022	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	14517000	usd
CY2021	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	16263000	usd
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	16603000	usd
CY2022	ewbc	Computer Software Expense ComputerSoftwareExpense	28259000	usd
CY2021	ewbc	Computer Software Expense ComputerSoftwareExpense	30600000	usd
CY2020	ewbc	Computer Software Expense ComputerSoftwareExpense	29033000	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	118166000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	96330000	usd
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	92646000	usd
CY2022	ewbc	Noninterest Expense Impairment Recoveries Amortization Of Tax Credit And Other Investments NoninterestExpenseImpairmentRecoveriesAmortizationOfTaxCreditAndOtherInvestments	113358000	usd
CY2021	ewbc	Noninterest Expense Impairment Recoveries Amortization Of Tax Credit And Other Investments NoninterestExpenseImpairmentRecoveriesAmortizationOfTaxCreditAndOtherInvestments	122457000	usd
CY2020	ewbc	Noninterest Expense Impairment Recoveries Amortization Of Tax Credit And Other Investments NoninterestExpenseImpairmentRecoveriesAmortizationOfTaxCreditAndOtherInvestments	70082000	usd
CY2022	ewbc	Securities Sold Under Agreements To Repurchase Charges Related To Extinguishment SecuritiesSoldUnderAgreementsToRepurchaseChargesRelatedToExtinguishment	0	usd
CY2021	ewbc	Securities Sold Under Agreements To Repurchase Charges Related To Extinguishment SecuritiesSoldUnderAgreementsToRepurchaseChargesRelatedToExtinguishment	0	usd
CY2020	ewbc	Securities Sold Under Agreements To Repurchase Charges Related To Extinguishment SecuritiesSoldUnderAgreementsToRepurchaseChargesRelatedToExtinguishment	8740000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	859393000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	796089000	usd
CY2020	us-gaap	Noninterest Expense NoninterestExpense	716322000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1411654000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1056377000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	685765000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	283571000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	183396000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	117968000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1128083000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	872981000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	567797000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.98
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.16
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.99
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.92
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.10
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.97
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	141326000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	141826000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	142336000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	142492000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	143140000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	142991000	shares
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1128083000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	872981000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	567797000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-508799000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-137950000	usd
CY2020	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	54666000	usd
CY2022	ewbc	Other Comprehensive Income Loss Securities Transferred To Held To Maturity Adjustment Including Amortization Of Unrealized Gains Losses Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentIncludingAmortizationOfUnrealizedGainsLossesNetOfTaxPortionAttributableToParent	100313000	usd
CY2021	ewbc	Other Comprehensive Income Loss Securities Transferred To Held To Maturity Adjustment Including Amortization Of Unrealized Gains Losses Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentIncludingAmortizationOfUnrealizedGainsLossesNetOfTaxPortionAttributableToParent	0	usd
CY2020	ewbc	Other Comprehensive Income Loss Securities Transferred To Held To Maturity Adjustment Including Amortization Of Unrealized Gains Losses Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentIncludingAmortizationOfUnrealizedGainsLossesNetOfTaxPortionAttributableToParent	0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-49788000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	1487000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-1230000	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-16348000	usd
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	1757000	usd
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	9297000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-675248000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-134706000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	62733000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	452835000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	738275000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	630530000	usd
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	5017617000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	567797000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	62733000	usd
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	32007000	usd
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.10
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	158793000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	5269175000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	872981000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-134706000	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	35206000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.32
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	189736000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	5837218000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1128083000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-675248000	usd
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	42832000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.60
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	229196000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	5984612000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1128083000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	872981000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	567797000	usd
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	73500000	usd
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-35000000	usd
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	210653000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	159851000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	156792000	usd
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	119908000	usd
CY2022	ewbc	Accretion Amortizationof Discountand Premiums Net AccretionAmortizationofDiscountandPremiumsNet	-56703000	usd
CY2021	ewbc	Accretion Amortizationof Discountand Premiums Net AccretionAmortizationofDiscountandPremiumsNet	-67415000	usd
CY2020	ewbc	Accretion Amortizationof Discountand Premiums Net AccretionAmortizationofDiscountandPremiumsNet	-17704000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	37601000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	32567000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	29237000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-43988000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4762000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-41515000	usd
CY2022	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	6411000	usd
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	8909000	usd
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	4501000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1306000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1568000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	12299000	usd
CY2022	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	3042000	usd
CY2021	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	1977000	usd
CY2020	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	207000	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	6861000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	5151000	usd
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	3717000	usd
CY2022	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	447000	usd
CY2021	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	11155000	usd
CY2020	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	81662000	usd
CY2022	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	461000	usd
CY2021	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	12552000	usd
CY2020	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	80659000	usd
CY2022	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	7586000	usd
CY2021	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	13117000	usd
CY2020	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	8786000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-187512000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-124496000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	340566000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	461385000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-63360000	usd
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	136260000	usd
CY2022	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	1673000	usd
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	558000	usd
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-1327000	usd
CY2022	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	937939000	usd
CY2021	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	295441000	usd
CY2020	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	124847000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	2066022000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1168422000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	692644000	usd
CY2022	ewbc	Paymentsfor Proceedsfrom Qualified Affordable Housing Partnershipsand Other Tax Credit Investments PaymentsforProceedsfromQualifiedAffordableHousingPartnershipsandOtherTaxCreditInvestments	167303000	usd
CY2021	ewbc	Paymentsfor Proceedsfrom Qualified Affordable Housing Partnershipsand Other Tax Credit Investments PaymentsforProceedsfromQualifiedAffordableHousingPartnershipsandOtherTaxCreditInvestments	189836000	usd
CY2020	ewbc	Paymentsfor Proceedsfrom Qualified Affordable Housing Partnershipsand Other Tax Credit Investments PaymentsforProceedsfromQualifiedAffordableHousingPartnershipsandOtherTaxCreditInvestments	154887000	usd
CY2022	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	596994000	usd
CY2021	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	73263000	usd
CY2020	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-613400000	usd
CY2022	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	1951388000	usd
CY2021	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	982694000	usd
CY2020	us-gaap	Proceeds From Securities Purchased Under Agreements To Resell ProceedsFromSecuritiesPurchasedUnderAgreementsToResell	450000000	usd
CY2022	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	390077000	usd
CY2021	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	1876197000	usd
CY2020	us-gaap	Payments For Securities Purchased Under Agreements To Resell PaymentsForSecuritiesPurchasedUnderAgreementsToResell	800000000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	129181000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	308812000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	525433000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	896726000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	1766184000	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2070131000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1070608000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	6779655000	usd
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	4758254000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	75635000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	usd
CY2022	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	50000000	usd
CY2021	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	usd
CY2020	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	usd
CY2022	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	602725000	usd
CY2021	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	606410000	usd
CY2020	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	331864000	usd
CY2022	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	657620000	usd
CY2021	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	1045456000	usd
CY2020	us-gaap	Payments To Acquire Finance Receivables PaymentsToAcquireFinanceReceivables	389863000	usd
CY2022	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	6516182000	usd
CY2021	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	2877438000	usd
CY2020	us-gaap	Payments For Proceeds From Other Loans And Leases PaymentsForProceedsFromOtherLoansAndLeases	3546596000	usd
CY2022	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	6482000	usd
CY2021	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	54338000	usd
CY2020	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	295000	usd
CY2022	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	734000	usd
CY2021	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	150000000	usd
CY2020	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	0	usd
CY2022	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	18221000	usd
CY2021	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	14440000	usd
CY2020	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	15901000	usd
CY2021	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	405400000	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	7720000	usd
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4763000	usd
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4360000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4582892000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-9117204000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6873736000	usd
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	2709427000	usd
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	8464285000	usd
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	7482845000	usd
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	6000	usd
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-21143000	usd
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-9016000	usd
CY2022	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	4950200000	usd
CY2021	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	400000	usd
CY2020	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	10300000	usd
CY2022	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	5200200000	usd
CY2020	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	105300000	usd
CY2022	ewbc	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	0	usd
CY2021	ewbc	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	0	usd
CY2020	ewbc	Proceeds From Repurchase Agreements ProceedsFromRepurchaseAgreements	48063000	usd
CY2022	ewbc	Repayments Of Repurchase Agreement RepaymentsOfRepurchaseAgreement	0	usd
CY2021	ewbc	Repayments Of Repurchase Agreement RepaymentsOfRepurchaseAgreement	0	usd
CY2020	ewbc	Repayments Of Repurchase Agreement RepaymentsOfRepurchaseAgreement	198063000	usd
CY2022	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	usd
CY2021	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	usd
CY2020	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	8740000	usd
CY2022	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	usd
CY2020	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	1437269000	usd
CY2022	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	943000	usd
CY2021	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	1206000	usd
CY2020	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	1438335000	usd
CY2022	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	3178000	usd
CY2021	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	2573000	usd
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	2326000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	19087000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	15702000	usd
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	8253000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	99990000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	145966000	usd
CY2022	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	228381000	usd
CY2021	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	188762000	usd
CY2020	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	158222000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2114210000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	7835045000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	6908908000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-28491000	usd
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8701000	usd
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	29006000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-431151000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-105036000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	756822000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3912935000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4017971000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3261149000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3481784000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3912935000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4017971000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	249587000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	87684000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	233139000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	281269000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	139460000	usd
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	116416000	usd
CY2022	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	623777000	usd
CY2021	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	599610000	usd
CY2020	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	329069000	usd
CY2022	us-gaap	Transfer To Investments TransferToInvestments	3010003000	usd
CY2021	us-gaap	Transfer To Investments TransferToInvestments	0	usd
CY2020	us-gaap	Transfer To Investments TransferToInvestments	0	usd
CY2022	ewbc	Transfer Of Financing Receivables To Foreclosed Assets TransferOfFinancingReceivablesToForeclosedAssets	270000	usd
CY2021	ewbc	Transfer Of Financing Receivables To Foreclosed Assets TransferOfFinancingReceivablesToForeclosedAssets	49485000	usd
CY2020	ewbc	Transfer Of Financing Receivables To Foreclosed Assets TransferOfFinancingReceivablesToForeclosedAssets	19504000	usd
CY2022Q4	ewbc	Number Of Banking Locations NumberOfBankingLocations	120	location
CY2022Q4	ewbc	Number Of Wholly Owned Statutory Business Trusts NumberOfWhollyOwnedStatutoryBusinessTrusts	6	trust
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2022Q4	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	760000000	usd
CY2021Q4	us-gaap	Securities Purchased Under Agreements To Resell Gross SecuritiesPurchasedUnderAgreementsToResellGross	1330000000	usd
CY2022	srt	Securities Purchased Under Agreements To Resell Average Yield SecuritiesPurchasedUnderAgreementsToResellAverageYield	0.0212
CY2021	srt	Securities Purchased Under Agreements To Resell Average Yield SecuritiesPurchasedUnderAgreementsToResellAverageYield	0.0153
CY2020	srt	Securities Purchased Under Agreements To Resell Average Yield SecuritiesPurchasedUnderAgreementsToResellAverageYield	0.0194
CY2022Q4	ewbc	Loans Purchased Under Agreements To Resell LoansPurchasedUnderAgreementsToResell	32200000	usd
CY2021Q4	ewbc	Loans Purchased Under Agreements To Resell LoansPurchasedUnderAgreementsToResell	1020000000.00	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	300000000	usd
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	300000000	usd
CY2022	srt	Securities Sold Under Agreements To Repurchase Average Rate Paid SecuritiesSoldUnderAgreementsToRepurchaseAverageRatePaid	0.0307
CY2021	srt	Securities Sold Under Agreements To Repurchase Average Rate Paid SecuritiesSoldUnderAgreementsToRepurchaseAverageRatePaid	0.0261
CY2020	srt	Securities Sold Under Agreements To Repurchase Average Rate Paid SecuritiesSoldUnderAgreementsToRepurchaseAverageRatePaid	0.0325
CY2022	ewbc	Securities Sold Under Agreements To Repurchase Charges Related To Extinguishment SecuritiesSoldUnderAgreementsToRepurchaseChargesRelatedToExtinguishment	0	usd
CY2021	ewbc	Securities Sold Under Agreements To Repurchase Charges Related To Extinguishment SecuritiesSoldUnderAgreementsToRepurchaseChargesRelatedToExtinguishment	0	usd
CY2020	ewbc	Securities Sold Under Agreements To Repurchase Charges Related To Extinguishment SecuritiesSoldUnderAgreementsToRepurchaseChargesRelatedToExtinguishment	8700000	usd
CY2020	ewbc	Extinguishment Of Securities Sold Under Agreements To Repurchase Amount ExtinguishmentOfSecuritiesSoldUnderAgreementsToRepurchaseAmount	150000000.0	usd
CY2022Q4	ewbc	Assets Purchased Under Agreements To Resell Gross AssetsPurchasedUnderAgreementsToResellGross	792192000	usd
CY2022Q4	ewbc	Assets Purchased Under Agreements To Resell Liability AssetsPurchasedUnderAgreementsToResellLiability	0	usd
CY2022Q4	ewbc	Assets Purchased Under Agreements To Resell AssetsPurchasedUnderAgreementsToResell	792192000	usd
CY2022Q4	ewbc	Assets Purchased Under Agreements To Resell Collateral Obligation To Return Assets AssetsPurchasedUnderAgreementsToResellCollateralObligationToReturnAssets	701790000	usd
CY2022Q4	ewbc	Assets Purchased Under Agreements To Resell Amount Offset Against Collateral AssetsPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	90402000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	300000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	300000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	300000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	0	usd
CY2021Q4	ewbc	Assets Purchased Under Agreements To Resell Gross AssetsPurchasedUnderAgreementsToResellGross	2353503000	usd
CY2021Q4	ewbc	Assets Purchased Under Agreements To Resell Liability AssetsPurchasedUnderAgreementsToResellLiability	0	usd
CY2021Q4	ewbc	Assets Purchased Under Agreements To Resell AssetsPurchasedUnderAgreementsToResell	2353503000	usd
CY2021Q4	ewbc	Assets Purchased Under Agreements To Resell Collateral Obligation To Return Assets AssetsPurchasedUnderAgreementsToResellCollateralObligationToReturnAssets	2327687000	usd
CY2021Q4	ewbc	Assets Purchased Under Agreements To Resell Amount Offset Against Collateral AssetsPurchasedUnderAgreementsToResellAmountOffsetAgainstCollateral	25816000	usd
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	300000000	usd
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0	usd
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	300000000	usd
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	300000000	usd
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	0	usd
CY2022Q4	us-gaap	Debt Securities DebtSecurities	9881093000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Cumulative Unrecognized Gain DebtSecuritiesAvailableForSaleAndHeldToMaturityCumulativeUnrecognizedGain	498000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Cumulative Unrecognized Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityCumulativeUnrecognizedLoss	1391427000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	8490164000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	10087179000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	51025000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	172851000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	9965353000	usd
CY2022Q1	ewbc	Debt Securities Available For Sale Transfer To Held To Maturity Amount DebtSecuritiesAvailableForSaleTransferToHeldToMaturityAmount	3010000000.00	usd
CY2022Q1	us-gaap	Oci Debt Securities Available For Sale Transfer To Held To Maturity Adjustment From Aoci For Amortization Of Gain Loss After Tax OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax	113000000	usd
CY2022Q4	ewbc	Debt Securities Available For Sale And Held To Maturity Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAccruedInterestBeforeAllowanceForCreditLoss	41800000	usd
CY2021Q4	ewbc	Debt Securities Available For Sale And Held To Maturity Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAccruedInterestBeforeAllowanceForCreditLoss	33100000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1451466000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	104682000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	4332275000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	740048000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	5783741000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	844730000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	5932965000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	106229000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	1778987000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	66622000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	7711952000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	172851000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	559	security
CY2022	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease	0	usd
CY2021	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease	0	usd
CY2020	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease	0	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	431	security
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2022	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease	0	usd
CY2021	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease	0	usd
CY2020	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease	0	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1306000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1568000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	12299000	usd
CY2022	ewbc	Tax Expenseon Saleof Availablefor Sale Debt Investment Securities TaxExpenseonSaleofAvailableforSaleDebtInvestmentSecurities	386000	usd
CY2021	ewbc	Tax Expenseon Saleof Availablefor Sale Debt Investment Securities TaxExpenseonSaleofAvailableforSaleDebtInvestmentSecurities	464000	usd
CY2020	ewbc	Tax Expenseon Saleof Availablefor Sale Debt Investment Securities TaxExpenseonSaleofAvailableforSaleDebtInvestmentSecurities	3636000	usd
CY2022	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	179720000	usd
CY2021	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	131985000	usd
CY2020	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	75590000	usd
CY2022	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	19186000	usd
CY2021	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	11998000	usd
CY2020	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	6963000	usd
CY2022	us-gaap	Interest Income Debt Securities Operating InterestIncomeDebtSecuritiesOperating	198906000	usd
CY2021	us-gaap	Interest Income Debt Securities Operating InterestIncomeDebtSecuritiesOperating	143983000	usd
CY2020	us-gaap	Interest Income Debt Securities Operating InterestIncomeDebtSecuritiesOperating	82553000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	303496000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	958127000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	800818000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	4816784000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	6879225000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	302412000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	886140000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	707539000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	4138902000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	6034993000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Maturity Within One Year Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield	0.0366
CY2022Q4	us-gaap	Debt Securities Available For Sale Maturity After One Through Five Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield	0.0218
CY2022Q4	us-gaap	Debt Securities Available For Sale Maturity After Five Through Ten Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield	0.0276
CY2022Q4	us-gaap	Debt Securities Available For Sale Maturity After10 Years Weighted Average Yield DebtSecuritiesAvailableForSaleMaturityAfter10YearsWeightedAverageYield	0.0316
CY2022Q4	us-gaap	Debt Securities Available For Sale Weighted Average Yield DebtSecuritiesAvailableForSaleWeightedAverageYield	0.0300
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date Year One DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateYearOne	0	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date After Year One Through Five DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive	404252000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date After Year5 Through10 DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10	471892000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date After Year10 DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10	2125724000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDate	3001868000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	364360000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	404155000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	1686656000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	2455171000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Maturity Within One Year Weighted Average Yield DebtSecuritiesHeldToMaturityMaturityWithinOneYearWeightedAverageYield	0
CY2022Q4	us-gaap	Debt Securities Held To Maturity Maturity After One Through Five Years Weighted Average Yield DebtSecuritiesHeldToMaturityMaturityAfterOneThroughFiveYearsWeightedAverageYield	0.0101
CY2022Q4	us-gaap	Debt Securities Held To Maturity Maturity After Five Through Ten Years Weighted Average Yield DebtSecuritiesHeldToMaturityMaturityAfterFiveThroughTenYearsWeightedAverageYield	0.0167
CY2022Q4	us-gaap	Debt Securities Held To Maturity Maturity After10 Years Weighted Average Yield DebtSecuritiesHeldToMaturityMaturityAfter10YearsWeightedAverageYield	0.0178
CY2022Q4	us-gaap	Debt Securities Held To Maturity Weighted Average Yield DebtSecuritiesHeldToMaturityWeightedAverageYield	0.0166
CY2022Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	61374000	usd
CY2021Q4	us-gaap	Federal Reserve Bank Stock FederalReserveBankStock	60184000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	17250000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	17250000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	78624000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	77434000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	755328000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	887264000	usd
CY2021Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	484184000	usd
CY2021Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	390171000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	242745000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	242745000	usd
CY2021Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	58679000	usd
CY2021Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	58679000	usd
CY2022Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	372038000	usd
CY2022Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	usd
CY2021Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	42274000	usd
CY2021Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	174048000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	140545000	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	644519000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	383231000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	157444000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	755328000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	242745000	usd
CY2022Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	372038000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	140545000	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	60567000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	79978000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	887264000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	242745000	usd
CY2022Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	644519000	usd
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	38438000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	606081000	usd
CY2021Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	484184000	usd
CY2021Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	58679000	usd
CY2021Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	42274000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	383231000	usd
CY2021Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	usd
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	383231000	usd
CY2021Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	390171000	usd
CY2021Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	58679000	usd
CY2021Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	174048000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	157444000	usd
CY2021Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	106598000	usd
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	50846000	usd
CY2022Q4	us-gaap	Derivative Asset Not Subject To Master Netting Arrangement DerivativeAssetNotSubjectToMasterNettingArrangement	2100000	usd
CY2021Q4	us-gaap	Derivative Asset Not Subject To Master Netting Arrangement DerivativeAssetNotSubjectToMasterNettingArrangement	587000	usd
CY2022Q4	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement DerivativeLiabilityNotSubjectToMasterNettingArrangement	566000	usd
CY2021Q4	us-gaap	Derivative Liability Not Subject To Master Netting Arrangement DerivativeLiabilityNotSubjectToMasterNettingArrangement	666000	usd
CY2022Q4	ewbc	Derivative Cash Collateral Received Including Amount Offsetby Fair Value Assetsand Excess Cash Amount DerivativeCashCollateralReceivedIncludingAmountOffsetbyFairValueAssetsandExcessCashAmount	-384900000	usd
CY2021Q4	ewbc	Derivative Cash Collateral Received Including Amount Offsetby Fair Value Assetsand Excess Cash Amount DerivativeCashCollateralReceivedIncludingAmountOffsetbyFairValueAssetsandExcessCashAmount	-47000000	usd
CY2022Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	372000000	usd
CY2021Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	42300000	usd
CY2022Q4	ewbc	Derivative Cash Collateral Posted Against Derivative Liabilities Including Amount Offsetthe Derivative Fair Value Liabilitiesand Excess Cash Amount DerivativeCashCollateralPostedAgainstDerivativeLiabilitiesIncludingAmountOffsettheDerivativeFairValueLiabilitiesandExcessCashAmount	490000	usd
CY2021Q4	ewbc	Derivative Cash Collateral Posted Against Derivative Liabilities Including Amount Offsetthe Derivative Fair Value Liabilitiesand Excess Cash Amount DerivativeCashCollateralPostedAgainstDerivativeLiabilitiesIncludingAmountOffsettheDerivativeFairValueLiabilitiesandExcessCashAmount	176500000	usd
CY2022Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	0	usd
CY2021Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	174000000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	48202430000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	41693781000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	595645000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	541579000	usd
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	47606785000	usd
CY2021Q4	us-gaap	Notes Receivable Net NotesReceivableNet	41152202000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	-70400000	usd
CY2021Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	-50700000	usd
CY2022Q4	us-gaap	Financing Receivable Accrued Interest Before Allowance For Credit Loss FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss	208400000	usd
CY2021Q4	us-gaap	Financing Receivable Accrued Interest Before Allowance For Credit Loss FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss	107400000	usd
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Credit Quality Indicators</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">All loans are subject to the Company’s credit review and monitoring process. For the commercial loan 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 consumer loan portfolio, payment performance or delinquency is typically the driving indicator for risk ratings.</span></div><div style="text-align:justify;text-indent:36pt"><span><br/></span></div><div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company utilizes internal credit risk ratings to assign each individual loan a risk rating of 1 through 10:</span></div><div style="text-align:justify;text-indent:36pt"><span><br/></span></div><div style="padding-left:72pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;padding-left:14.5pt">Pass</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> —</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">loans risk rated 1 through 5 are assigned an internal risk rating category of “Pass.” Loans risk rated 1 are typically loans fully secured by cash. Pass loans have sufficient sources of repayment to repay the loan in full, in accordance with all terms and conditions.</span></div><div style="padding-left:72pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;padding-left:14.5pt">Special mention</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">— </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">loans assigned a risk rating of 6 have potential weaknesses that warrant closer attention by management; these are assigned an internal risk rating category of “Special Mention.”</span></div><div style="padding-left:72pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;padding-left:14.5pt">Substandard</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> —</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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 category of “Substandard.”</span></div><div style="padding-left:72pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;padding-left:14.5pt">Doubtful</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> — 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 category of “Doubtful.”</span></div><div style="padding-left:72pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;padding-left:14.5pt">Loss</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> —</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">loans assigned a risk rating of 10 are uncollectible and of such little value that they are no longer considered bankable assets; these are assigned an internal risk rating category of “Loss.”</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Loan exposures categorized as criticized consist of special mention, substandard, doubtful and loss categories. The Company reviews the internal risk ratings of its loan portfolio on a regular basis, and adjusts the ratings based on changes in the borrowers’ financial status and the collectability of the loans.</span></div>
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	12464897000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	8204714000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	4810435000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	3871740000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	2936646000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	4261980000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	11460495000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan	191523000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	48202430000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	10680884000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	6294357000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	5104045000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	3678223000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	2400331000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	3686038000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	9612862000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan	237041000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	41693781000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	99526000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	48202430000	usd
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	93181000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	41693781000	usd
CY2022Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	44585000	usd
CY2021Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	42887000	usd
CY2022Q4	ewbc	Financing Receivable Foreclosed Assets FinancingReceivableForeclosedAssets	270000	usd
CY2021Q4	ewbc	Financing Receivable Foreclosed Assets FinancingReceivableForeclosedAssets	10300000	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	9	loan
CY2022	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	69712000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	39112000	usd
CY2022	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	12640000	usd
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	6	loan
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	25256000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	21329000	usd
CY2021	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	1108000	usd
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	17	loan
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	174898000	usd
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	156914000	usd
CY2020	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	19573000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	39112000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	21329000	usd
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	156914000	usd
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	2	loan
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	10296000	usd
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	loan
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	11431000	usd
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	loan
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	15852000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	16200000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	5000000	usd
CY2022	us-gaap	Credit Derivative Term1 CreditDerivativeTerm1	P10Y
CY2022Q4	ewbc	Life Time Loss Rate Period Span LifeTimeLossRatePeriodSpan	11	q
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	541579000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	74767000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	37920000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	19461000	usd
CY2022	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	18459000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Loss Foreign Currency Translation FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation	-2242000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	595645000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	619983000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-28954000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	66592000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	16614000	usd
CY2021	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	49978000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Loss Foreign Currency Translation FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation	528000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	541579000	usd
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	358287000	usd
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	198691000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	81837000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	18672000	usd
CY2020	us-gaap	Allowance For Loan And Lease Losses Writeoffs Net AllowanceForLoanAndLeaseLossesWriteoffsNet	63165000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Loss Foreign Currency Translation FinancingReceivableAllowanceForCreditLossForeignCurrencyTranslation	1012000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	619983000	usd
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	73500000	usd
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-35000000	usd
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	210653000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	12200000	usd
CY2022Q4	ewbc	Financing Receivable And Off Balance Sheet Credit Loss Allowance FinancingReceivableAndOffBalanceSheetCreditLossAllowance	621900000	usd
CY2022	ewbc	Financing Receivable And Off Balance Sheet Credit Loss Allowance Period Increase Decrease FinancingReceivableAndOffBalanceSheetCreditLossAllowancePeriodIncreaseDecrease	52800000	usd
CY2021Q4	ewbc	Financing Receivable And Off Balance Sheet Credit Loss Allowance FinancingReceivableAndOffBalanceSheetCreditLossAllowance	569100000	usd
CY2022	ewbc	Annual Gdp Growth Rate AnnualGDPGrowthRate	0.019
CY2022	ewbc	Average Increase In The Unemployment Rate AverageIncreaseInTheUnemploymentRate	0.037
CY2022	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	623777000	usd
CY2022	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	631000	usd
CY2022	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	595767000	usd
CY2022	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	657270000	usd
CY2021	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	599610000	usd
CY2021	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	621543000	usd
CY2021	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	1044711000	usd
CY2020	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	329069000	usd
CY2020	us-gaap	Financing Receivable Significant Sales FinancingReceivableSignificantSales	412221000	usd
CY2020	us-gaap	Financing Receivable Significant Purchases FinancingReceivableSignificantPurchases	389580000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	3100000	usd
CY2020	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	2800000	usd
CY2022	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	6400000	usd
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	8900000	usd
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	4500000	usd
CY2022	ewbc	Minimum Compliance Period To Fully Utilize Tax Credits MinimumCompliancePeriodToFullyUtilizeTaxCredits	P15Y
CY2022Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	413253000	usd
CY2022Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	266654000	usd
CY2021Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	289741000	usd
CY2021Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	146152000	usd
CY2022Q4	ewbc	Investmentsin Tax Creditand Other Investments Net InvestmentsinTaxCreditandOtherInvestmentsNet	350003000	usd
CY2022Q4	ewbc	Other Tax Credit Investments Commitment OtherTaxCreditInvestmentsCommitment	185797000	usd
CY2021Q4	ewbc	Investmentsin Tax Creditand Other Investments Net InvestmentsinTaxCreditandOtherInvestmentsNet	338522000	usd
CY2021Q4	ewbc	Other Tax Credit Investments Commitment OtherTaxCreditInvestmentsCommitment	163464000	usd
CY2022Q4	ewbc	Investments In Qualified Affordable Housing Partnerships Tax Credit And Other Investments Assets Total InvestmentsInQualifiedAffordableHousingPartnershipsTaxCreditAndOtherInvestmentsAssetsTotal	763256000	usd
CY2022Q4	ewbc	Investments In Qualified Affordable Housing Partnerships Tax Credit And Other Investments Liabilities Unfunded Commitments Total InvestmentsInQualifiedAffordableHousingPartnershipsTaxCreditAndOtherInvestmentsLiabilitiesUnfundedCommitmentsTotal	452451000	usd
CY2021Q4	ewbc	Investments In Qualified Affordable Housing Partnerships Tax Credit And Other Investments Assets Total InvestmentsInQualifiedAffordableHousingPartnershipsTaxCreditAndOtherInvestmentsAssetsTotal	628263000	usd
CY2021Q4	ewbc	Investments In Qualified Affordable Housing Partnerships Tax Credit And Other Investments Liabilities Unfunded Commitments Total InvestmentsInQualifiedAffordableHousingPartnershipsTaxCreditAndOtherInvestmentsLiabilitiesUnfundedCommitmentsTotal	309616000	usd
CY2022	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	52132000	usd
CY2021	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	50643000	usd
CY2020	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	45971000	usd
CY2022	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	38759000	usd
CY2021	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	33248000	usd
CY2020	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	37132000	usd
CY2022	ewbc	Noninterest Expense Impairment Recoveries Amortization Of Tax Credit And Other Investments NoninterestExpenseImpairmentRecoveriesAmortizationOfTaxCreditAndOtherInvestments	113358000	usd
CY2021	ewbc	Noninterest Expense Impairment Recoveries Amortization Of Tax Credit And Other Investments NoninterestExpenseImpairmentRecoveriesAmortizationOfTaxCreditAndOtherInvestments	122457000	usd
CY2020	ewbc	Noninterest Expense Impairment Recoveries Amortization Of Tax Credit And Other Investments NoninterestExpenseImpairmentRecoveriesAmortizationOfTaxCreditAndOtherInvestments	70082000	usd
CY2022	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	-2928000	usd
CY2021	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	-746000	usd
CY2020	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	732000	usd
CY2022	ewbc	Tax Credit Investments Pre Tax Recoveries TaxCreditInvestmentsPreTaxRecoveries	469000	usd
CY2021	ewbc	Tax Credit Investments Pre Tax Recoveries TaxCreditInvestmentsPreTaxRecoveries	1250000	usd
CY2020	ewbc	Tax Credit Investments Pre Tax Recoveries TaxCreditInvestmentsPreTaxRecoveries	-3699000	usd
CY2022Q4	us-gaap	Other Commitment Due In Next Twelve Months OtherCommitmentDueInNextTwelveMonths	312795000	usd
CY2022Q4	us-gaap	Other Commitment Due In Second Year OtherCommitmentDueInSecondYear	64576000	usd
CY2022Q4	us-gaap	Other Commitment Due In Third Year OtherCommitmentDueInThirdYear	64617000	usd
CY2022Q4	us-gaap	Other Commitment Due In Fourth Year OtherCommitmentDueInFourthYear	3936000	usd
CY2022Q4	us-gaap	Other Commitment Due In Fifth Year OtherCommitmentDueInFifthYear	1413000	usd
CY2022Q4	us-gaap	Other Commitment Due After Fifth Year OtherCommitmentDueAfterFifthYear	5114000	usd
CY2022Q4	us-gaap	Other Commitment OtherCommitment	452451000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	465700000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	465700000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	21051090000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	22845464000	usd
CY2022Q4	ewbc	Interest Bearing Deposit Checking InterestBearingDepositChecking	6672165000	usd
CY2021Q4	ewbc	Interest Bearing Deposit Checking InterestBearingDepositChecking	6524721000	usd
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	12265024000	usd
CY2021Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	13130300000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2649037000	usd
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	2888065000	usd
CY2022Q4	us-gaap	Deposits Deposits	55967849000	usd
CY2021Q4	us-gaap	Deposits Deposits	53350532000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	10560000000	usd
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	5950000000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	13102192000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	201014000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	16009000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	4795000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	6523000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	13330533000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	12770000000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	11930000000	usd
CY2022Q4	ewbc	Number Of Wholly Owned Statutory Business Trusts NumberOfWhollyOwnedStatutoryBusinessTrusts	6	trust
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	163797000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	84249000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	84560000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	160629000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	95939000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	74252000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3133000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-1554000	usd
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	671000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	327559000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	178634000	usd
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	159483000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-23484000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1528000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-28093000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-21835000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3259000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-11671000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1331000	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-25000	usd
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1751000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-43988000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4762000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-41515000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	283571000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	183396000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	117968000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.078
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.074
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.072
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.089
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.113
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.124
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.002
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.014
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.201
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.174
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.172
CY2022Q4	ewbc	Deferred Tax Assets Allowance For Credit Losses And Nonperforming Assets Valuation Allowance DeferredTaxAssetsAllowanceForCreditLossesAndNonperformingAssetsValuationAllowance	191187000	usd
CY2021Q4	ewbc	Deferred Tax Assets Allowance For Credit Losses And Nonperforming Assets Valuation Allowance DeferredTaxAssetsAllowanceForCreditLossesAndNonperformingAssetsValuationAllowance	166398000	usd
CY2022Q4	ewbc	Deferred Tax Assets Investmentsin Qualified Affordable Housing Partnerships Tax Creditand Other Investments Net DeferredTaxAssetsInvestmentsinQualifiedAffordableHousingPartnershipsTaxCreditandOtherInvestmentsNet	21011000	usd
CY2021Q4	ewbc	Deferred Tax Assets Investmentsin Qualified Affordable Housing Partnerships Tax Creditand Other Investments Net DeferredTaxAssetsInvestmentsinQualifiedAffordableHousingPartnershipsTaxCreditandOtherInvestmentsNet	14977000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	25857000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	23954000	usd
CY2022Q4	ewbc	Deferred Tax Assets Interestincomeonnonaccrualloans DeferredTaxAssetsInterestincomeonnonaccrualloans	5185000	usd
CY2021Q4	ewbc	Deferred Tax Assets Interestincomeonnonaccrualloans DeferredTaxAssetsInterestincomeonnonaccrualloans	4192000	usd
CY2022Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	13259000	usd
CY2021Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	5237000	usd
CY2022Q4	ewbc	Net Unrealized Losses On Debt Securities And Derivatives NetUnrealizedLossesOnDebtSecuritiesAndDerivatives	309837000	usd
CY2021Q4	ewbc	Net Unrealized Losses On Debt Securities And Derivatives NetUnrealizedLossesOnDebtSecuritiesAndDerivatives	37423000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	0	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	8692000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	3827000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1434000	usd
CY2022Q4	ewbc	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	34859000	usd
CY2021Q4	ewbc	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	31324000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	6169000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1018000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	611191000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	294649000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	27237000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	26607000	usd
CY2022Q4	ewbc	Deferred Tax Liabilities Affordable Housing Partnerships Tax Credit And Other Investmentsnet DeferredTaxLiabilitiesAffordableHousingPartnershipsTaxCreditAndOtherInvestmentsnet	7709000	usd
CY2021Q4	ewbc	Deferred Tax Liabilities Affordable Housing Partnerships Tax Credit And Other Investmentsnet DeferredTaxLiabilitiesAffordableHousingPartnershipsTaxCreditAndOtherInvestmentsnet	12187000	usd
CY2022Q4	ewbc	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends	1926000	usd
CY2021Q4	ewbc	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends	1886000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	1963000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	1759000	usd
CY2022Q4	ewbc	Deferred Tax Liabilities Acquired Debt DeferredTaxLiabilitiesAcquiredDebt	1477000	usd
CY2021Q4	ewbc	Deferred Tax Liabilities Acquired Debt DeferredTaxLiabilitiesAcquiredDebt	1536000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2478000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1525000	usd
CY2022Q4	ewbc	Deferred Tax Liabilities Operating Lease Rightof Use Asset DeferredTaxLiabilitiesOperatingLeaseRightofUseAsset	32606000	usd
CY2021Q4	ewbc	Deferred Tax Liabilities Operating Lease Rightof Use Asset DeferredTaxLiabilitiesOperatingLeaseRightofUseAsset	29472000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	6270000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1547000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	81666000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	76519000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	529525000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	218130000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5045000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5045000	usd
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	5045000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	4568000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	477000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5045000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5045000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	5200000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	4600000	usd
CY2022	us-gaap	Income Tax Examination Interest Expense IncomeTaxExaminationInterestExpense	-599000	usd
CY2022Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	2290000000	usd
CY2021Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	2220000000	usd
CY2022Q4	ewbc	Allowancefor Unfunded Credit Commitments AllowanceforUnfundedCreditCommitments	26200000	usd
CY2021Q4	ewbc	Allowancefor Unfunded Credit Commitments AllowanceforUnfundedCreditCommitments	27500000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	37601000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	32567000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	29237000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5293000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1760000	usd
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	-1839000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1128083000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	872981000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	567797000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	141326000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	141826000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	142336000	shares
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	7.98
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.16
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.99
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	1128083000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	872981000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	567797000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	141326000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	141826000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	142336000	shares
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1166000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1314000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	655000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	142492000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	143140000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	142991000	shares
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.92
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.10
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.97
CY2020Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	500000000	usd
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	4471682	shares
CY2020	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	32.64
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	146000000	usd
CY2022	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	1385517	shares
CY2022	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	72.17
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	100000000	usd
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0	shares
CY2022	us-gaap	Oci Debt Securities Available For Sale Transfer To Held To Maturity Adjustment From Aoci For Amortization Of Gain Loss After Tax OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossAfterTax	113000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-949946000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-274698000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-675248000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-193420000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-58714000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-134706000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	83250000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	20517000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	62733000	usd
CY2022Q4	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Capital Adequacy Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioCapitalAdequacyMinimum	0.045
CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.060
CY2022Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.080
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.040
CY2022Q4	ewbc	Regulatory Capital Fully Phasedin Capital Conservation Buffer RegulatoryCapitalFullyPhasedinCapitalConservationBuffer	0.025
CY2022Q4	ewbc	Regulatory Capital Fully Phasedin Capital Conservation Buffer RegulatoryCapitalFullyPhasedinCapitalConservationBuffer	0.025
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2022	ewbc	Number Of Core Segment NumberOfCoreSegment	2	segment
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	2045881000	usd
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	73500000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	298666000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	859393000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1411654000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1128083000	usd
CY2022Q4	us-gaap	Assets Assets	64112150000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1531571000	usd
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-35000000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	285895000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	796089000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1056377000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	872981000	usd
CY2021Q4	us-gaap	Assets Assets	60870701000	usd
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	1377193000	usd
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	210653000	usd
CY2020	us-gaap	Noninterest Income NoninterestIncome	235547000	usd
CY2020	us-gaap	Noninterest Expense NoninterestExpense	716322000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	685765000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	567797000	usd
CY2020Q4	us-gaap	Assets Assets	52156913000	usd
CY2022	dei	Auditor Name AuditorName	KPMG LLP
CY2022	dei	Auditor Location AuditorLocation	Los Angeles, CA
CY2022	dei	Auditor Firm AuditorFirmId	185

Files In Submission

Name	View Source	Status
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0001069157-23-000016-index.html	Edgar Link	pending
0001069157-23-000016.txt	Edgar Link	pending
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ewbc-20221231_pre.xml	Edgar Link	unprocessable
ewbc-20221231_cal.xml	Edgar Link	unprocessable

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$EWBC
EAST WEST BANCORP INC Stock $ewbc

2023 Q1 Form 10-K Financial Statement

#000106915723000016 Filed on February 27, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EWBC EAST WEST BANCORP INC Stock $ewbc

2023 Q1 Form 10-K Financial Statement

#000106915723000016 Filed on February 27, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$EWBC
EAST WEST BANCORP INC Stock $ewbc