XML 88 R69.htm IDEA: XBRL DOCUMENT
v3.21.1

Loans Receivable and Allowance for Credit Losses (Additions to TDRs) (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 USD ($) loan | Mar. 31, 2020 USD ($) loan
Loans Modified as TDRs |  |
Number of Loans | loan | 1 | 3
Pre- Modification Outstanding Recorded Investment | $ 443 | $ 16,604
Post-Modification Outstanding Recorded Investment | 433 | 15,735
Financial Impact | 203 | 98
Principal |  |
Loans Modified as TDRs |  |
Post-Modification Outstanding Recorded Investment | 433 | 4,564
Principal and Interest |  |
Loans Modified as TDRs |  |
Post-Modification Outstanding Recorded Investment | $ 0 | $ 11,171
Commercial lending | Commercial and industrial (“C&I”) |  |
Loans Modified as TDRs |  |
Number of Loans | loan | 1 | 3
Pre- Modification Outstanding Recorded Investment | $ 443 | $ 16,604
Post-Modification Outstanding Recorded Investment | 433 | 15,735
Financial Impact | 203 | 98
Commercial lending | Commercial and industrial (“C&I”) | Principal |  |
Loans Modified as TDRs |  |
Post-Modification Outstanding Recorded Investment | 433 | 4,564
Commercial lending | Commercial and industrial (“C&I”) | Principal and Interest |  |
Loans Modified as TDRs |  |
Post-Modification Outstanding Recorded Investment | $ 0 | $ 11,171

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_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=ewbc_PrincipalForbearancePaymentsTermExtensionsPrincipalDefermentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=ewbc_PrincipalAndInterestDefermentsOrReductionsMember
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: |