XML 66 R46.htm IDEA: XBRL DOCUMENT
v3.20.2

Fair Value Measurement and Fair Value of Financial Instruments (Carrying Amounts of Assets That Were Still Held and Had Fair Value Changes Measured on a Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | $ 109,404 |
Loans | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 103,575 |
Loans | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 5,829 |
Loans | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Significant Other Observable Inputs (Level 2) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Significant Other Observable Inputs (Level 2) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 109,404 |
Loans | Significant Unobservable Inputs (Level 3) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 103,575 |
Loans | Significant Unobservable Inputs (Level 3) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 5,829 |
Loans | Commercial and industrial (“C&I”) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 53,122 |
Loans | Commercial and industrial (“C&I”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Commercial and industrial (“C&I”) | Significant Other Observable Inputs (Level 2) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Commercial and industrial (“C&I”) | Significant Unobservable Inputs (Level 3) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 53,122 |
Loans | Commercial real estate (“CRE”) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 50,453 |
Loans | Commercial real estate (“CRE”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Commercial real estate (“CRE”) | Significant Other Observable Inputs (Level 2) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Commercial real estate (“CRE”) | Significant Unobservable Inputs (Level 3) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 50,453 |
Loans | HELOCs | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 3,338 |
Loans | HELOCs | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | HELOCs | Significant Other Observable Inputs (Level 2) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | HELOCs | Significant Unobservable Inputs (Level 3) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 3,338 |
Loans | Other consumer | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 2,491 |
Loans | Other consumer | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Other consumer | Significant Other Observable Inputs (Level 2) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 0 |
Loans | Other consumer | Significant Unobservable Inputs (Level 3) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) | 2,491 |
Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | $ 49,679
Non-PCI impaired loans | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 48,307
Non-PCI impaired loans | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 1,372
Non-PCI impaired loans | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Significant Other Observable Inputs (Level 2) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Significant Other Observable Inputs (Level 2) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 49,679
Non-PCI impaired loans | Significant Unobservable Inputs (Level 3) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 48,307
Non-PCI impaired loans | Significant Unobservable Inputs (Level 3) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 1,372
Non-PCI impaired loans | Commercial and industrial (“C&I”) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 47,554
Non-PCI impaired loans | Commercial and industrial (“C&I”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Commercial and industrial (“C&I”) | Significant Other Observable Inputs (Level 2) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Commercial and industrial (“C&I”) | Significant Unobservable Inputs (Level 3) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 47,554
Non-PCI impaired loans | Commercial real estate (“CRE”) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 753
Non-PCI impaired loans | Commercial real estate (“CRE”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Commercial real estate (“CRE”) | Significant Other Observable Inputs (Level 2) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | Commercial real estate (“CRE”) | Significant Unobservable Inputs (Level 3) | Commercial lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 753
Non-PCI impaired loans | HELOCs | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 1,372
Non-PCI impaired loans | HELOCs | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | HELOCs | Significant Other Observable Inputs (Level 2) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 0
Non-PCI impaired loans | HELOCs | Significant Unobservable Inputs (Level 3) | Consumer lending |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Individually evaluated loans (current period)/Non-PCI impaired loans (prior period) |  | 1,372
OREO |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure |  | 125
OREO | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure |  | 0
OREO | Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure |  | 0
OREO | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure |  | 125
Investments in tax credit and other investments, net |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure | 6,216 | 3,076
Investments in tax credit and other investments, net | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure | 0 | 0
Investments in tax credit and other investments, net | Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure | 0 | 0
Investments in tax credit and other investments, net | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure | $ 6,216 | 3,076
Other nonperforming assets |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure |  | 1,167
Other nonperforming assets | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure |  | 0
Other nonperforming assets | Significant Other Observable Inputs (Level 2) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure |  | 0
Other nonperforming assets | Significant Unobservable Inputs (Level 3) |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Assets, fair value disclosure |  | $ 1,167

X
- Definition Impaired Loans, Fair Value Disclosure + References No definition available. + Details
Name: | ewbc_ImpairedLoansFairValueDisclosure
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ewbc_CommercialAndIndustrialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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