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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES (Details 4) (USD $) | Mar. 31, 2015 | Dec. 31, 2014
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Loans in process of foreclosure |  |
Other real estate owned, net | $ 32,692,000 us-gaap_OtherRealEstateAndForeclosedAssets | $ 32,111,000 us-gaap_OtherRealEstateAndForeclosedAssets
Loans Receivable | PCI loans |  |
Nonaccrual loans |  |
Loans on nonaccrual status | 53,400,000 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / us-gaap_FairValueByAssetClassAxis = ewbc_ReceivablesAcquiredWithDeterioratedCreditQualityMember | 63,400,000 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = us-gaap_LoansReceivableMember / us-gaap_FairValueByAssetClassAxis = ewbc_ReceivablesAcquiredWithDeterioratedCreditQualityMember
Residential real estate properties |  |
Loans in process of foreclosure |  |
Carrying amount of foreclosed residential real estate properties included in total net OREO | 4,100,000 us-gaap_RealEstateAcquiredThroughForeclosure / ewbc_CollateralAxis = us-gaap_ResidentialRealEstateMember | 3,500,000 us-gaap_RealEstateAcquiredThroughForeclosure / ewbc_CollateralAxis = us-gaap_ResidentialRealEstateMember
Residential |  |
Loans in process of foreclosure |  |
Recorded investment of consumer mortgage loans for which formal foreclosure proceedings are in process | $ 16,700,000 ewbc_MortgageLoansInProcessOfForeclosureAmount / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember | $ 16,900,000 ewbc_MortgageLoansInProcessOfForeclosureAmount / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember

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- Definition Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process. + References No definition available. + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524 + Details
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- Definition Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings. + 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(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4437-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 28 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule III -Article 5 + Details
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