XML 59 R59.htm IDEA: XBRL DOCUMENT
v2.4.0.8

COVERED ASSETS AND FDIC INDEMNIFICATION ASSET (Details 5) (USD $) |  |  |  |  | 3 Months Ended | 6 Months Ended |  |  |  |  |  | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended |  | 0 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2014 Covered loans accounted for under ASC 310-10 | Dec. 31, 2013 Covered loans accounted for under ASC 310-10 | Jun. 30, 2014 Covered loans | Jun. 30, 2013 Covered loans | Jun. 30, 2014 Covered loans | Jun. 30, 2013 Covered loans | Dec. 31, 2013 Covered loans | Jun. 30, 2014 Covered loans Covered Advances | Dec. 31, 2013 Covered loans Covered Advances | Jun. 30, 2014 Covered loans PCI Covered Loans | Dec. 31, 2013 Covered loans PCI Covered Loans | Jun. 30, 2014 Covered loans Covered OREO Properties item | Dec. 31, 2013 Covered loans Covered OREO Properties | Jun. 30, 2014 Covered loans Covered OREO Properties Geographic Concentration California | Dec. 31, 2013 Covered loans Covered OREO Properties Geographic Concentration California | Jun. 30, 2014 Covered loans Covered OREO Properties Geographic Concentration Massachusetts | Dec. 31, 2013 Covered loans Covered OREO Properties Geographic Concentration Massachusetts | Jun. 30, 2014 Covered loans Covered OREO Properties Geographic Concentration Washington | Jun. 30, 2014 Covered loans United Commercial Bank (UCB) item | Dec. 31, 2013 Covered loans United Commercial Bank (UCB) | Nov. 06, 2009 Covered loans United Commercial Bank (UCB) Covered loans acquired from specific acquiree Geographic Concentration California | Nov. 06, 2009 Covered loans United Commercial Bank (UCB) Covered loans acquired from specific acquiree Geographic Concentration New York | Nov. 06, 2009 Covered loans United Commercial Bank (UCB) Covered loans acquired from specific acquiree Geographic Concentration Hong Kong
Credit Risk and Concentrations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of the entity's total covered loans acquired from a specific counterparty |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 94.00% | 94.00% |  |  |
Percent of total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24.00% | 31.00% | 26.00% | 31.00% | 22.00% |  |  | 64.00% | 11.00% | 10.00%
Number of general geographic regions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |
Covered Nonperforming Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Covered nonaccrual loans |  |  | $ 14,300,000 | $ 17,700,000 | $ 86,771,000 | [1],[2],[3] |  | $ 86,771,000 | [1],[2],[3] |  | $ 126,895,000 | [1],[2],[3] | $ 14,300,000 | $ 17,700,000 | $ 72,500,000 | $ 109,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Other real estate owned covered, net | 24,779,000 | 21,373,000 |  |  | 24,779,000 |  |  | 24,779,000 |  |  | 21,373,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total covered nonperforming assets |  |  |  |  | 111,550,000 |  |  | 111,550,000 |  |  | 148,268,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of any reimbursable expense recorded as interest income under ASC 310-30 |  |  |  |  | 80.00% |  |  | 80.00% |  |  | 80.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Covered loans past due 90 days or more but not on nonaccrual |  |  |  |  | 0 |  |  | 0 |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Covered nonaccrual loans |  |  | 14,300,000 | 17,700,000 | 86,771,000 | [1],[2],[3] |  | 86,771,000 | [1],[2],[3] |  | 126,895,000 | [1],[2],[3] | 14,300,000 | 17,700,000 | 72,500,000 | 109,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Covered OREO balances |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,800,000 | 21,400,000 |  |  |  |  |  |  |  |  |  |
Number of covered OREO properties added during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |
Aggregate carrying value of covered OREO properties added during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,600,000 |  |  |  |  |  |  |  |  |  |  |
Net valuation adjustments included in aggregate carrying value on covered OREO properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 465,000 | 2,400,000 |  |  |  |  |  |  |  |  |  |
Number of covered OREO properties sold during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |
Total proceeds value of covered OREO properties sold during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,700,000 |  |  |  |  |  |  |  |  |  |  |
Total net gains (losses) on covered OREO properties sold during the period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |  |  |  |  |  |  |  |  |
Covered TDR activity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  |  |  |  | 73,234,000 |  | 141,923,000 | 116,007,000 |  | 157,736,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  | 704,000 |  | 3,709,000 | 787,000 |  | 25,793,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transfers to covered OREO |  |  |  |  | (1,230,000) |  |  | (1,230,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Charge-offs |  |  |  |  | (500,000) |  | (3,762,000) | (1,323,000) |  | (7,466,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Paydowns/ Reductions |  |  |  |  | (13,414,000) |  | (21,622,000) | (54,217,000) |  | (55,815,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period |  |  |  |  | 60,024,000 |  | 120,248,000 | 60,024,000 |  | 120,248,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes in the accretable yield for the covered loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  |  |  |  | 424,005,000 |  | 503,476,000 | 461,545,000 |  | 556,986,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accretion |  |  |  |  | (64,114,000) |  | (84,811,000) | (125,304,000) |  | (166,438,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes in expected cash flows |  |  |  |  | 27,236,000 |  | 40,052,000 | 50,886,000 |  | 68,169,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period |  |  |  |  | 387,127,000 |  | 458,717,000 | 387,127,000 |  | 458,717,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Covered assets - other disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount reclassified from nonaccretable yield to accretable yield due to changes in loss rate assumptions |  |  |  |  | 19,600,000 |  | 26,000,000 | 38,600,000 |  | 39,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of loans removed from the covered loans accounted for under ASC 310-30, excluding scheduled principal payments |  |  |  |  |  |  |  | 353,700,000 |  | 392,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan discount related to payoffs and removals of loans |  |  |  |  |  |  |  | $ 51,100,000 |  | $ 74,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Covered nonaccrual loans include loans that meet the criteria for nonaccrual but have a yield accreted through interest income under ASC 310-30. All losses on covered loans are 80% reimbursed by the FDIC.
[2] | Net of discount.
[3] | Includes $14.3 million and $17.7 million of covered advances as of June 30, 2014 and December 31, 2013, respectively; and $72.5 million and $109.2 million of PCI loans as of June 30, 2014 and December 31, 2013, respectively.

X
- Definition Aggregate carrying value of OREO properties as of the balance sheet date covered by shared-loss agreements. + References No definition available. + Details
Name: | ewbc_AggregateCarryingValueOfCoveredOreoProperties
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate carrying value of OREO properties covered by shared-loss agreements that were added during the period. + References No definition available. + Details
Name: | ewbc_AggregateCarryingValueOfCoveredOreoPropertiesAdded
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of loans removed from the covered loans due to loans being paid in full, sold, or transferred to covered OREO, excluding scheduled principal payments. + References No definition available. + Details
Name: | ewbc_AmountOfLoansRemovedFromCoveredLoans
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount reclassified from nonaccretable yield to accretable yield due to changes in loss rate assumptions. + References No definition available. + Details
Name: | ewbc_CertainLoansAcquiredInTransferAccretableYieldReclassificationsFromNonaccretableDifference
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the change in the estimate of cash flows expected to be collected. This relates to a loan accounted for as an available-for-sale debt security, with evidence of deterioration of credit quality since origination that was 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 No definition available. + Details
Name: | ewbc_ChangesInExpectedCashFlows
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The combined net gains (losses) resulting from sales of OREO properties covered by shared-loss agreements during the period. + References No definition available. + Details
Name: | ewbc_CombinedNetGainsLossesOnCoveredOreoPropertiesSold
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the number of general geographic regions in relation to concentration of credit risk. + References No definition available. + Details
Name: | ewbc_ConcentrationRiskNumberOfGeneralGeographicRegions
Namespace Prefix: | ewbc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The carrying amount as of the balance sheet date of covered loans receivable that are considered to be nonperforming assets and are past due 90 days or more, but are not on nonaccrual status. + References No definition available. + Details
Name: | ewbc_CoveredLoansPastDue90DaysOrMoreButNotOnNonaccrual
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ewbc_CoveredNonperformingAssetsAbstract
Namespace Prefix: | ewbc_
Data Type: | xbrli:stringItemType
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 The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings covered under FDIC loss sharing agreements. + References No definition available. + Details
Name: | ewbc_FinancingReceivableModificationsRecordedInvestmentCovered
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of troubled debt restructurings covered under FDIC loss sharing agreements that were added during the period. + References No definition available. + Details
Name: | ewbc_FinancingReceivableModificationsRecordedInvestmentCoveredAdditions
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount transferred from troubled debt restructurings covered under FDIC loss sharing agreements to other real estate owned. + References No definition available. + Details
Name: | ewbc_FinancingReceivableModificationsRecordedInvestmentCoveredTransferredToOREO
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of paydowns or reductions related to financing receivables that have been modified by troubled debt restructurings, during the period. + References No definition available. + Details
Name: | ewbc_FinancingReceivableModificationsRecordedInvestmentPaydownsOrReductions
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reflects the amount of write-downs related to troubled debt restructurings covered under FDIC loss sharing agreements. + References No definition available. + Details
Name: | ewbc_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDownCovered
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Represents the amount of loan discount related to the loans removed from the covered loans. + References No definition available. + Details
Name: | ewbc_LoanDiscountRelatedToLoansRemoved
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of OREO properties covered by shared-loss agreements that were added during the period. + References No definition available. + Details
Name: | ewbc_NumberOfCoveredOreoPropertiesAdded
Namespace Prefix: | ewbc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of OREO properties covered by shared-loss agreements that were sold during the period. + References No definition available. + Details
Name: | ewbc_NumberOfCoveredOreoPropertiesSold
Namespace Prefix: | ewbc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net real estate and foreclosed assets "covered" and guaranteed for 80% reimbursement by the FDIC's loss share agreements. + References No definition available. + Details
Name: | ewbc_OtherRealEstateOwnedCoveredNet
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reductions in the carrying value of covered OREO properties during the period due to net adjustments. + References No definition available. + Details
Name: | ewbc_OtherRealEstateOwnedCoveredReductionsDueToAdjustments
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The percentage of any reimbursable expense (chargeoffs, loan related expenses and OREO related expenses) that is recorded as interest income on the Consolidated Statement of Income. + References No definition available. + Details
Name: | ewbc_PercentageOfAnyReimbursableExpenseRecordedAsInterestIncome
Namespace Prefix: | ewbc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of the entity's total covered loans which were acquired from a specific counterparty. + References No definition available. + Details
Name: | ewbc_PercentageOfTotalCoveredLoansAcquiredFromCounterparty
Namespace Prefix: | ewbc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The carrying amount as of the balance sheet date of all covered nonperforming assets. + References No definition available. + Details
Name: | ewbc_TotalCoveredNonperformingAssets
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total proceeds of OREO properties covered by shared-loss agreements that were sold during the period. + References No definition available. + Details
Name: | ewbc_TotalProceedsOfCoveredOreoPropertiesSold
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of decrease from accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant