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SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS (Details 2) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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SECURITIES PURCHASED UNDER RESALE AGREEMENTS AND SOLD UNDER REPURCHASE AGREEMENTS |  |
Gross repurchase agreements | $ 995,000 us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross | $ 995,000 us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross
Weighted average interest rates (as a percent) | 3.70%ewbc_AssetsSoldUnderAgreementsToRepurchaseInterestRateCustom | 3.70%ewbc_AssetsSoldUnderAgreementsToRepurchaseInterestRateCustom

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- Definition Interest rate associated with the assets sold under agreements to repurchase. + References No definition available. + Details
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- Details
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- 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226000-175313 + Details
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