XML 85 R74.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net [Abstract] |  |  |  |  |
Minimum compliance period for qualified affordable housing partnerships to fully utilize the tax credits (in years) |  |  | 15 years |  |
Investments in qualified affordable housing partnerships, net | $ 169,103 |  | $ 169,103 |  | $ 183,917
Accrued expenses and other liabilities — Unfunded commitments | 51,412 |  | 51,412 |  | $ 57,243
Tax credits and other tax benefits recognized | 9,566 | $ 8,518 | 19,187 | $ 17,970 |
Amortization expense included in income tax expense | $ 7,051 | $ 7,345 | $ 14,001 | $ 14,311 |

X
- Definition Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net [Abstract] + References No definition available. + Details
Name: | ewbc_InvestmentsinQualifiedAffordableHousingPartnershipsTaxCreditandOtherInvestmentsNetAbstract
Namespace Prefix: | ewbc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum compliance period, to meet regulatory requirements for affordable housing, to fully utilize the tax credits. + References No definition available. + Details
Name: | ewbc_MinimumCompliancePeriodToFullyUtilizeTaxCredits
Namespace Prefix: | ewbc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of affordable housing tax credits and other tax benefits recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64813897&loc=SL49122993-202985 + Details
Name: | us-gaap_AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64813897&loc=SL49122993-202985 + Details
Name: | us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of amortization expense of investment in qualified affordable housing projects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64813897&loc=SL49122993-202985 + Details
Name: | us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of commitment or contingent commitments to qualified affordable housing project investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=64813897&loc=SL49122993-202985 + Details
Name: | us-gaap_QualifiedAffordableHousingProjectInvestmentsCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant