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FEDERAL HOME LOAN BANK ADVANCES AND LONG-TERM DEBT (Details 2) (USD $) In Billions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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FEDERAL HOME LOAN BANK ADVANCES AND LONG-TERM DEBT |  |
Available borrowing capacity from unused FHLB advances | $ 5.54 us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds | $ 3.70 us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds
Additional available borrowing capacity from the Federal Reserve Bank's discount window | $ 3.03 ewbc_FederalHomeLoanBankAdvancesAdditionalAvailableBorrowingCapacity | $ 1.42 ewbc_FederalHomeLoanBankAdvancesAdditionalAvailableBorrowingCapacity

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- Definition The additional available borrowing capacity from the Federal Reserve Bank's discount window derived from the portfolio of loans that are pledged to the Federal Reserve Bank. + References No definition available. + Details
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- Details
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- Definition Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(3)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22 (b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13 -Subparagraph 3(a) -Article 9 + Details
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