XML 60 R43.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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | $ (9,432) | $ (9,181) | $ (25,674) | $ (28,414)
Investments in tax credit and other investments, net |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 877 | (733) | 877 | (583)
Other nonperforming assets |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 0 | 0 | (3,890) | 0
OREO |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (910) | 0 | (910) | 0
Commercial lending | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (6,944) | (9,117) | (23,152) | (30,648)
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 | (6,462) | (8,846) | (15,530) | (30,372)
Commercial lending | Commercial real estate (“CRE”) | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (275) | (271) | (7,336) | (276)
Commercial lending | Multifamily residential | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 2 | 0 | (6) | 0
Commercial lending | Construction and land | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (209) | 0 | (280) | 0
Consumer lending | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (2,488) | (64) | (2,522) | 2,234
Consumer lending | Single Family Residential | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 0 | 0 | (8) | 0
Consumer lending | HELOCs | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 3 | (64) | (23) | (257)
Consumer lending | Other consumer | Loans held-for-investment |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | $ (2,491) | $ 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_FairValueByAssetClassAxis=ewbc_OtherRealEstateOwnedMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ewbc_ConstructionAndLandLoanMember
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=ewbc_SingleFamilyResidentialMember
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: |