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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES (Details 8) (Loans Receivable, USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Recorded investment in total loans receivable related to each balance in the allowance for loan losses |  |  |  |
Individually evaluated for impairment | $ 130,152 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment |  | $ 154,120 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment |
Collectively evaluated for impairment | 20,007,430 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment |  | 20,250,912 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment |
Acquired with deteriorated credit quality | 1,237,986 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality | [1] | 1,322,113 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality | [1]
Total loans | 21,375,568 us-gaap_NotesReceivableGross | [1] | 21,727,145 us-gaap_NotesReceivableGross | [1]
CRE |  |  |  |
Recorded investment in total loans receivable related to each balance in the allowance for loan losses |  |  |  |
Individually evaluated for impairment | 47,472 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |  | 65,393 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |
Collectively evaluated for impairment | 6,323,569 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |  | 6,036,823 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember |
Acquired with deteriorated credit quality | 674,380 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember | [1] | 717,297 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember | [1]
Total loans | 7,045,421 us-gaap_NotesReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember | [1] | 6,819,513 us-gaap_NotesReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember | [1]
C&I |  |  |  |
Recorded investment in total loans receivable related to each balance in the allowance for loan losses |  |  |  |
Individually evaluated for impairment | 39,217 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialPortfolioSegmentMember |  | 36,543 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialPortfolioSegmentMember |
Collectively evaluated for impairment | 7,604,022 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialPortfolioSegmentMember |  | 7,951,038 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialPortfolioSegmentMember |
Acquired with deteriorated credit quality | 77,525 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialPortfolioSegmentMember | [1] | 89,620 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialPortfolioSegmentMember | [1]
Total loans | 7,720,764 us-gaap_NotesReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialPortfolioSegmentMember | [1] | 8,077,201 us-gaap_NotesReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialPortfolioSegmentMember | [1]
Residential |  |  |  |
Recorded investment in total loans receivable related to each balance in the allowance for loan losses |  |  |  |
Individually evaluated for impairment | 42,205 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember |  | 50,925 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember |
Collectively evaluated for impairment | 4,496,929 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember |  | 4,780,354 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember |
Acquired with deteriorated credit quality | 458,085 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember | [1] | 485,410 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember | [1]
Total loans | 4,997,219 us-gaap_NotesReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember | [1] | 5,316,689 us-gaap_NotesReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember | [1]
Consumer |  |  |  |
Recorded investment in total loans receivable related to each balance in the allowance for loan losses |  |  |  |
Individually evaluated for impairment | 1,258 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ConsumerPortfolioSegmentMember |  | 1,259 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ConsumerPortfolioSegmentMember |
Collectively evaluated for impairment | 1,582,910 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ConsumerPortfolioSegmentMember |  | 1,482,697 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ConsumerPortfolioSegmentMember |
Acquired with deteriorated credit quality | 27,996 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ConsumerPortfolioSegmentMember | [1] | 29,786 us-gaap_FinancingReceivableAcquiredWithDeterioratedCreditQuality / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ConsumerPortfolioSegmentMember | [1]
Total loans | $ 1,612,164 us-gaap_NotesReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ConsumerPortfolioSegmentMember | [1] | $ 1,513,742 us-gaap_NotesReceivableGross / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ConsumerPortfolioSegmentMember | [1]
[1] | Loans net of ASC 310-30 discount.

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- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Subparagraph 3 -Article 9 + Details
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