XML 72 R80.htm IDEA: XBRL DOCUMENT
v2.4.0.6

COMMITMENTS AND CONTINGENCIES (Details 2) (USD $) | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Guarantees |  |
Recourse reserve related to loan sales and securitizations totaled | $ 4,300,000 | $ 4,800,000
Other Commitments |  |
Other Commitments | 78,800,000 | 84,600,000
Loans Sold or Securitized with Recourse |  |
Guarantees |  |
Principal amount of loans sold or securitized | 421,500,000 | 461,800,000
Recourse reserve related to loan sales and securitizations totaled | 4,300,000 | 4,800,000
Loans Sold or Securitized with Recourse | Single-family Loans with Full Recourse |  |
Guarantees |  |
Principal amount of loans sold or securitized | 46,800,000 | 48,400,000
Loans Sold or Securitized with Recourse | Multi-family Loans with Limited Recourse |  |
Guarantees |  |
Principal amount of loans sold or securitized | 374,700,000 | 413,400,000
Recourse provision limitation, maximum percentage of the top loss on the underlying loans | 4.00% | 4.00%
Loans Sold without Recourse |  |
Guarantees |  |
Principal amount of loans sold or securitized | 901,800,000 | 953,200,000
Loans Securitized without Recourse |  |
Guarantees |  |
Principal amount of loans sold or securitized | 227,400,000 | 235,800,000
Commitment to repurchase the loan | $ 0 |

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

X
- Definition The maximum percentage of the top loss on the underlying loans to which the recourse provision on multifamily loans is limited. + References No definition available. + Details
Name: | ewbc_PercentageLimitOfRecourseOnLoans
Namespace Prefix: | ewbc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The portion of the allowance for unfunded loan commitments, off-balance sheet credit exposures and recourse provisions specifically related to off-balance sheet loans sold and securitized. + References No definition available. + Details
Name: | ewbc_PortionOfAllowanceForUnfundedLoanCommitmentsOffBalanceSheetCreditExposuresAndRecourseProvisionsRelatedToOffBalanceSheetLoansSoldandSecuritized
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This is the principal amount outstanding for sold or securitized loans only (across all types of loans). + References No definition available. + Details
Name: | ewbc_PrincipalAmountOutstandingOnLoansSoldOrSecuritized
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=SL6742756-110258 + Details
Name: | us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant