XML 41 R87.htm IDEA: XBRL DOCUMENT
v2.4.1.9

NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 3) (USD $) | 12 Months Ended | 0 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 17, 2014
Loans Held for Sale |  |  |  |  |  |
Total loans held for sale | $ 45,950,000 us-gaap_LoansReceivableHeldForSaleNet |  | $ 204,970,000 us-gaap_LoansReceivableHeldForSaleNet |  |  |
Write-down of loans transferred from loans held for investment to loans held for sale recorded to allowance for loan losses | 5,200,000 ewbc_WriteDownsOnLoansHeldForSale |  | 0 ewbc_WriteDownsOnLoansHeldForSale |  |  |
Loans receivable reclassified to loans held for sale | 837,389,000 us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 |  | 97,065,000 us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 |  | 144,131,000 us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 |
Non-covered loans |  |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |  |
Percentage of non-covered commercial real estate loans and non-covered residential loans secured by real properties located in California | 80.00%ewbc_NoncoveredCommercialRealEstateLoansAndNoncoveredResidentialLoansSecuredByRealPropertiesLocatedInCaliforniaConcentrationRiskPercentage / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  |  |  |  |
Non-Covered Loans | 20,249,451,000 ewbc_NoncoveredLoansReceivableGross / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember | [1] | 15,678,317,000 ewbc_NoncoveredLoansReceivableGross / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember | [1] |  |
Purchased Loans |  |  |  |  |  |
Loans purchased during the period | 113,200,000 ewbc_LoansAcquiredDuringPeriod / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | 759,300,000 ewbc_LoansAcquiredDuringPeriod / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  |  |
Percentage of purchased loans classified as student loans |  |  | 63.00%ewbc_PercentageOfPurchasedLoansClassifiedAsStudentLoans / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  |  |
Loans Held for Sale |  |  |  |  |  |
Total loans held for sale | 46,000,000 us-gaap_LoansReceivableHeldForSaleNet / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | 205,000,000 us-gaap_LoansReceivableHeldForSaleNet / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  |  |
Proceeds from the sales of Loans held for sale, including loans reclassified to loans held for sale | 1,140,000,000 ewbc_ProceedsFromSaleOfLoansHeldForSaleAndReclassified / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | 376,400,000 ewbc_ProceedsFromSaleOfLoansHeldForSaleAndReclassified / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | 428,700,000 ewbc_ProceedsFromSaleOfLoansHeldForSaleAndReclassified / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |
Net gain from sale of loans held for sale during the period | 39,100,000 us-gaap_GainLossOnSaleOfLoansAndLeases / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | 7,800,000 us-gaap_GainLossOnSaleOfLoansAndLeases / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | 17,000,000 us-gaap_GainLossOnSaleOfLoansAndLeases / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |
Loans receivable reclassified to loans held for sale | 837,400,000 us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | 97,100,000 us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1 / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  |  |
MetroCorp |  |  |  |  |  |
Acquired Loans |  |  |  |  |  |
Loans acquired during the period |  |  |  |  |  | 1,190,000,000 ewbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansReceivable / us-gaap_BusinessAcquisitionAxis = ewbc_MetroCorpMember
MetroCorp | Non-covered loans |  |  |  |  |  |
Acquired Loans |  |  |  |  |  |
Loans acquired during the period |  |  |  |  |  | 1,190,000,000 ewbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansReceivable / us-gaap_BusinessAcquisitionAxis = ewbc_MetroCorpMember / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember
Acquired loans accounted (as a percent) |  |  |  |  |  | 6.00%ewbc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionPercentage / us-gaap_BusinessAcquisitionAxis = ewbc_MetroCorpMember / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember
PCI loans | 50,600,000 us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet / us-gaap_BusinessAcquisitionAxis = ewbc_MetroCorpMember / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  |  |  |  |
Residential | Non-covered loans |  |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |  |
Non-Covered Loans | 4,820,668,000 ewbc_NoncoveredLoansReceivableGross / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | 4,185,309,000 ewbc_NoncoveredLoansReceivableGross / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_ResidentialPortfolioSegmentMember / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  |  |
CRE | Non-covered loans |  |  |  |  |  |
Credit Risk and Concentrations |  |  |  |  |  |
Non-Covered Loans | $ 6,134,046,000 ewbc_NoncoveredLoansReceivableGross / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  | $ 4,585,077,000 ewbc_NoncoveredLoansReceivableGross / ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis = us-gaap_CommercialRealEstatePortfolioSegmentMember / ewbc_ReceivableByIndemnificationStatusAxis = ewbc_NonCoveredLoansMember |  |  |
[1] | Loans net of ASC 310-30 discount.

X
- Definition Represents the amount of loans receivable acquired at the acquisition date. + References No definition available. + Details
Name: | ewbc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansReceivable
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the contractually required payments receivable at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality, expressed as a percentage of the total acquired loans. + References No definition available. + Details
Name: | ewbc_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionPercentage
Namespace Prefix: | ewbc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ewbc_CreditRiskAndConcentrationsAbstract
Namespace Prefix: | ewbc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loans purchased during the reporting period. + References No definition available. + Details
Name: | ewbc_LoansAcquiredDuringPeriod
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage of non-covered commercial real estate loans and non-covered residential loans secured by real properties located in California. + References No definition available. + Details
Name: | ewbc_NoncoveredCommercialRealEstateLoansAndNoncoveredResidentialLoansSecuredByRealPropertiesLocatedInCaliforniaConcentrationRiskPercentage
Namespace Prefix: | ewbc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reflects the gross carrying amount of all categories of non-covered loans held in portfolio. + References No definition available. + Details
Name: | ewbc_NoncoveredLoansReceivableGross
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the percentage of purchased loans classified as student loans. + References No definition available. + Details
Name: | ewbc_PercentageOfPurchasedLoansClassifiedAsStudentLoans
Namespace Prefix: | ewbc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow resulting from the sale of loans classified as held-for-sale, including loans reclassified to loans held for sale. + References No definition available. + Details
Name: | ewbc_ProceedsFromSaleOfLoansHeldForSaleAndReclassified
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The write-down of loans transferred from loans held for investment to loans held for sale recorded to allowance for loan losses. + References No definition available. + Details
Name: | ewbc_WriteDownsOnLoansHeldForSale
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAcquiredDuringPeriodAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans and leases that were sold during the reporting period. This element refers to the gain (loss) and not to the cash proceeds of the sales. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfLoansAndLeases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount classified as loans attributable to disposal group held for sale or disposed of. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph a -Article 9 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 210.9-03.7(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 310 -SubTopic 10 -Section 35 -Paragraph 49 -URI http://asc.fasb.org/extlink&oid=35742846&loc=d3e3084-111518 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6490209&loc=d3e48214-111002 + Details
Name: | us-gaap_LoansReceivableHeldForSaleNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LoansReceivableHeldForSaleNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
Name: | us-gaap_TransferOfPortfolioLoansAndLeasesToHeldForSale1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ewbc_FinancingReceivableInformationByPortfolioSegmentsAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ewbc_ReceivableByIndemnificationStatusAxis=ewbc_NonCoveredLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ewbc_MetroCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |