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INVESTMENTS IN QUALIFIED AFFORDABLE HOUSING PARTNERSHIPS, NET, TAX CREDIT AND OTHER INVESTMENTS (Details 2) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Investments in qualified affordable housing partnership, net |  |  |  |  |
Investment in qualified affordable housing partnerships, net | $ 182,719,000 ewbc_InvestmentInAffordableHousingPartnerships |  |  | $ 178,962,000 ewbc_InvestmentInAffordableHousingPartnerships | [1]
Accrued expenses and other liabilities - Unfunded commitments | 50,884,000 ewbc_QualifiedAffordableHousingProjectInvestmentsCommitment |  |  | 43,311,000 ewbc_QualifiedAffordableHousingProjectInvestmentsCommitment |
Tax credits and other tax benefits recognized | 8,775,000 ewbc_AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount | 7,792,000 ewbc_AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount |  |  |
Amortization expense included in provision for income taxes | 6,244,000 ewbc_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization | 5,357,000 ewbc_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization |  |  |
Investments in tax credit and other investments |  |  |  |  |
Investments in tax credit and other investments | 117,000,000 ewbc_OtherTaxCreditInvestments |  |  | 110,100,000 ewbc_OtherTaxCreditInvestments |
Unfunded commitments for investments in tax credit and other investments | 66,200,000 ewbc_OtherTaxCreditInvestmentsCommitment |  |  | 71,400,000 ewbc_OtherTaxCreditInvestmentsCommitment |
Noninterest expense - Amortization of tax credit and other investments | $ 6,299,000 ewbc_NoninterestExpenseAmortizationOfTaxCreditInvestments | $ 1,492,000 ewbc_NoninterestExpenseAmortizationOfTaxCreditInvestments | [1] |  |
[1] | Prior periods were restated to reflect the retrospective application of adopting the new accounting guidance related to the Company?s investments in qualified affordable housing projects Accounting Standard Update ("ASU") 2014-01. See Note 10 of the Notes to Consolidated Financial Statements for additional information.

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- Definition Amount of affordable housing tax credits and other tax benefits recognized. + References No definition available. + Details
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- Definition Amount of amortization expense of investment in qualified affordable housing projects. + References No definition available. + Details
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- Definition Investments in limited partnership interests in affordable housing projects for lower income tenants, which have related tax credits. The initial cost of the investment is amortized in proportion to the tax credits and other tax benefits received, and the amortization is recognized in the income statement as a component of income tax expense. + References No definition available. + Details
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- Details
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- Definition Amortization of investments in projects that qualify for Community Reinvestment Act ("CRA") and other tax credits, included as a component of noninterest expense. + References No definition available. + Details
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- Definition Represents the amount of investments in certain limited partnerships that qualify for Community Reinvestment Act (CRA) credits or other types of tax credits. + References No definition available. + Details
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- Definition Amount of commitment or contingent commitments to investments in certain limited partnerships that qualify for Community Reinvestment Act (CRA) credits or other types of tax credits. + References No definition available. + Details
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- Definition Amount of commitment or contingent commitments to qualified affordable housing project investments. + References No definition available. + Details
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