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AFFORDABLE HOUSING PARTNERSHIPS AND OTHER TAX CREDIT INVESTMENTS (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
AFFORDABLE HOUSING PARTNERSHIPS AND OTHER TAX CREDIT INVESTMENTS |  |  |
Minimum compliance period to fully utilize the tax credits | 15 years |  |
Investment in affordable housing partnerships, net | $ 178,652,000 ewbc_InvestmentInAffordableHousingPartnerships | $ 164,776,000 ewbc_InvestmentInAffordableHousingPartnerships |
CRA and other tax credit investments | 110,100,000 ewbc_InvestmentsInAffordableHousingPartnershipsOther | 70,200,000 ewbc_InvestmentsInAffordableHousingPartnershipsOther |
Total unfunded commitments for investments | 114,700,000 us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments | 73,100,000 us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments |
Affordable housing partnerships and other tax credits | 84,800,000 ewbc_AffordableHousingPartnershipAndOtherTaxCredits | 34,200,000 ewbc_AffordableHousingPartnershipAndOtherTaxCredits | 18,700,000 ewbc_AffordableHousingPartnershipAndOtherTaxCredits
Amortization of investments in affordable housing partnerships and other tax credit investments | 75,660,000 ewbc_AmortizationOfInvestmentsInAffordableHousingPartnerships | 27,268,000 ewbc_AmortizationOfInvestmentsInAffordableHousingPartnerships | 18,058,000 ewbc_AmortizationOfInvestmentsInAffordableHousingPartnerships
Remaining tax credits | $ 193,800,000 ewbc_InvestmentInAffordableHousingPartnershipsRemainingTaxCreditsAndOtherInvestments |  |

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- Definition Amount of affordable housing partnership and other tax credit investments used during the reporting period. + References No definition available. + Details
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- Definition The amortization related to limited partnership interests in projects of affordable housing for lower income tenants and other investments. The investments in which the Company recorded using the cost method are being amortized using the level-yield method over the life of the related tax credits. + References No definition available. + Details
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- Definition Investments in limited partnership interests in projects of affordable housing for lower income tenants, which have related tax credits. The investments in which the Company has significant influence or has a limited partnership interest that exceeds 5% are recorded using the equity method of accounting. The remaining investments are recorded using the cost method and are being amortized using the level-yield method over the life of the related tax credits. + References No definition available. + Details
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- Definition Remaining tax credits related to the investments in limited partnership interests in projects of affordable housing for lower income tenants and other investments. + References No definition available. + Details
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- Details
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- Definition Represents the amount of investments in certain limited partnerships that qualify for Community Reinvestment Act (CRA) credits or that qualify for other types of tax credits . The Community Reinvestment Act (CRA) encourages banks to meet the credit needs of their communities for housing and other purposes, particularly in neighborhoods with low or moderate incomes, included in other assets in the consolidated balance sheets. + References No definition available. + Details
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- Definition Represents the minimum compliance period, to meet regulatory requirements for affordable housing, to fully utilize the tax credits. + References No definition available. + Details
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- Definition The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=SL6742756-110258 + Details
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