XML 143 R82.htm IDEA: XBRL DOCUMENT v2.4.1.9
COVERED ASSETS AND FDIC INDEMNIFICATION ASSET (Details 5) (Covered Loans, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Carrying Amounts And Composition Of Covered Loans    
Total principal balance $ 1,604,940us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered [1] $ 2,461,560us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered [2]
PCI Covered Loans
    
Carrying Amounts And Composition Of Covered Loans    
Principal Balance 61,600us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ewbc_PurchasedCreditImpairedCoveredLoansMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 129,700us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= ewbc_PurchasedCreditImpairedCoveredLoansMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 1,357,240us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 2,003,632us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 27,428us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 43,604us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 220,272us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 406,855us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Doubtful
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 7,469us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 751,719us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 1,267,363us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 597,223us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 899,223us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 21,090us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 37,323us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 133,406us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 323,451us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Doubtful
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 7,366us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | CRE
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 705,665us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 1,103,530us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | CRE | Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 579,133us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 857,376us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | CRE | Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 12,575us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 27,851us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | CRE | Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 113,957us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 211,835us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | CRE | Doubtful
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 6,468us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialAndIndustrialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Construction and land
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 46,054us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 163,833us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Construction and land | Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 18,090us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 41,847us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Construction and land | Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 8,515us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 9,472us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Construction and land | Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 19,449us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 111,616us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
CRE | Construction and land | Doubtful
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 898us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ConstructionAndLandMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
C&I
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 252,986us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 426,621us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
C&I | Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 217,975us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 378,086us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
C&I | Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 5,723us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 4,635us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
C&I | Doubtful
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 103us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
C&I | Commercial business | Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 29,288us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialBusinessMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 43,797us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_CommercialBusinessMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 537,249us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 693,603us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 480,032us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 654,270us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 474us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 1,518us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 56,743us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 37,815us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Single-family
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 240,650us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialSingleFamilyMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 290,095us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialSingleFamilyMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Single-family | Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 232,139us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialSingleFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 281,246us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialSingleFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Single-family | Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 474us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialSingleFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 733us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialSingleFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Single-family | Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 8,037us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialSingleFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 8,116us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialSingleFamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Multifamily
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 296,599us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialMultifamilyMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 403,508us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialMultifamilyMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Multifamily | Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 247,893us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialMultifamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 373,024us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialMultifamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Multifamily | Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 0us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialMultifamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 785us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialMultifamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Residential | Multifamily | Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 48,706us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialMultifamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 29,699us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ewbc_ResidentialMultifamilyMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Consumer | Other Consumer
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 62,986us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerOtherFinancingReceivableMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 73,973us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerOtherFinancingReceivableMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Consumer | Other Consumer | Pass/Watch
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 62,010us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerOtherFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 72,053us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerOtherFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Consumer | Other Consumer | Special Mention
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance 141us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerOtherFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 128us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerOtherFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
Consumer | Other Consumer | Substandard
    
Carrying Amounts And Composition Of Covered Loans    
Total principal balance $ 835us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerOtherFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember		 $ 1,792us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
/ ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis
= us-gaap_ConsumerPortfolioSegmentMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ConsumerOtherFinancingReceivableMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ ewbc_ReceivableByIndemnificationStatusAxis
= ewbc_CoveredLoansMember
[1] Includes $253.3 million of covered advances comprised of $154.8 million, $59.4 million, $27.3 million and $11.8 million of C&I, CRE, consumer and residential loans, respectively.
[2] Includes $320.2 million of covered advances comprised of $230.6 million, $46.7 million, $30.9 million and $12.0 million of C&I, CRE, consumer and residential loans, respectively.