XML 60 R42.htm IDEA: XBRL DOCUMENT
v3.21.2

Fair Value Measurement and Fair Value of Financial Instruments (Increase (Decrease) in Fair Value of Assets Measured on a Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | $ (5,064) | $ (24,940) | $ (23,273) | $ (36,834)
Investments in tax credit and other investments, net |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 0 | 0 | 877 | (583)
Other nonperforming assets |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (43) | 0 | (3,933) | 0
Commercial lending | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (5,067) | (24,943) | (20,776) | (39,147)
Commercial lending | Commercial and industrial (“C&I”) | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (4,977) | (24,928) | (13,590) | (38,855)
Commercial lending | Commercial real estate (“CRE”) | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (106) | (15) | (7,186) | (292)
Commercial lending | Multifamily residential | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 16 | 0 | 0 | 0
Consumer lending | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 3 | 3 | (2,497) | 2,313
Consumer lending | HELOCs | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 3 | 3 | (6) | (178)
Consumer lending | Other consumer | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | $ 0 | $ 0 | $ (2,491) | $ 2,491

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_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_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: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
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=ewbc_MultifamilyResidentialMember
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_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: |