XML 99 R93.htm IDEA: XBRL DOCUMENT
v3.20.1

Revenue from Contracts with Customers (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 15,804,000 | $ 13,280,000 |
Other sources of noninterest income | 38,245,000 | 28,851,000 |
Total noninterest income | 54,049,000 | 42,131,000 |
Contract with Customer, Asset, Gross, Noncurrent | 0 |  | $ 0
Contract with Customer, Liability, Noncurrent | 0 |  | $ 0
Consumer and Business Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 11,459,000 | 9,699,000 |
Other sources of noninterest income | 4,943,000 | 4,073,000 |
Total noninterest income | 16,402,000 | 13,772,000 |
Commercial Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 4,339,000 | 3,565,000 |
Other sources of noninterest income | 28,117,000 | 20,979,000 |
Total noninterest income | 32,456,000 | 24,544,000 |
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 6,000 | 16,000 |
Other sources of noninterest income | 5,185,000 | 3,799,000 |
Total noninterest income | 5,191,000 | 3,815,000 |
Deposit service charges and related fee income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 9,349,000 | 8,523,000 |
Deposit service charges and related fee income | Consumer and Business Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 5,544,000 | 5,233,000 |
Deposit service charges and related fee income | Commercial Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 3,799,000 | 3,274,000 |
Deposit service charges and related fee income | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 6,000 | 16,000 |
Card income |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 1,098,000 | 945,000 |
Card income | Consumer and Business Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 898,000 | 760,000 |
Card income | Commercial Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 200,000 | 185,000 |
Card income | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 0 | 0 |
Wealth management fees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 5,357,000 | 3,812,000 |
Wealth management fees | Consumer and Business Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 5,017,000 | 3,706,000 |
Wealth management fees | Commercial Banking |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | 340,000 | 106,000 |
Wealth management fees | Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contracts with customers | $ 0 | $ 0 |

X
- Definition Other sources of noninterest income not derived from contracts with customers. + References No definition available. + Details
Name: | ewbc_OtherSourcesOfNoninterestIncome
Namespace Prefix: | ewbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130533-203044 + Details
Name: | us-gaap_ContractWithCustomerAssetGrossNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 + Details
Name: | us-gaap_ContractWithCustomerLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
Name: | us-gaap_NoninterestIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ewbc_ConsumerandBusinessBankingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=ewbc_CommercialBankingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=ewbc_DepositServiceChargesAndRelatedFeeIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=ewbc_CardIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=ewbc_WealthManagementFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |