XML 51 R40.htm IDEA: XBRL DOCUMENT
v3.5.0.2

FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 4) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Loans held-for-sale |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Fair value adjustments | $ 0 | $ 211,000 | $ 2,400,000 | $ 728,000
Fair Value, Measurements, Nonrecurring | OREO |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Fair value adjustments | (41,000) | (1,556,000) | (994,000) | (1,739,000)
Fair Value, Measurements, Nonrecurring | Loans held-for-sale |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Fair value adjustments | 0 | 0 | (2,351,000) | (517,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI impaired loans |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Fair value adjustments | (219,000) | (979,000) | (3,753,000) | (11,275,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI impaired loans | CRE |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Fair value adjustments | (282,000) | 101,000 | 1,741,000 | (845,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI impaired loans | C&I |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Fair value adjustments | 77,000 | (707,000) | (5,497,000) | (9,806,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI impaired loans | Residential |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Fair value adjustments | (14,000) | (314,000) | (14,000) | (565,000)
Fair Value, Measurements, Nonrecurring | Loans Receivable | Non-PCI impaired loans | Consumer |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Fair value adjustments | $ 0 | $ (59,000) | $ 17,000 | $ (59,000)

X
- Definition Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=ewbc_LoansHeldForSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=ewbc_OtherRealEstateOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_LoansReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=ewbc_ReceivablesOriginatedOrAcquiredWithoutDeterioratedCreditQualityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |