XML 84 R61.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Assets Purchased under Resale Agreements and Sold under Repurchase Agreements - Repurchase Agreements (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Amount of securities sold under repurchase agreements |  |  |  |
Gross repurchase agreements |  | $ 0 | $ 300,000,000 |
Extinguishment of repurchase agreements | $ 300,000,000 |  |  |
Repurchase agreements’ extinguishment cost |  | $ 4,000,000 | $ 0 | $ 0
Securities sold under agreements to repurchase average rate paid |  |  | 3.07% | 2.61%

X
- Definition Extinguishment of Securities Sold Under Agreements To Repurchase, Amount + References No definition available. + Details
Name: | ewbc_ExtinguishmentOfSecuritiesSoldUnderAgreementsToRepurchaseAmount
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Securities Sold Under Agreements To Repurchase, Charges Related To Extinguishment + References No definition available. + Details
Name: | ewbc_SecuritiesSoldUnderAgreementsToRepurchaseChargesRelatedToExtinguishment
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Average rate paid on securities sold under agreements to repurchase. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph (a) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph (b) -Subparagraph (3) -Publisher SEC + Details
Name: | srt_SecuritiesSoldUnderAgreementsToRepurchaseAverageRatePaid
Namespace Prefix: | srt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LongTermDebtByMaturityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483466/210-20-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-7 + Details
Name: | us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant