XML 98 R75.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Derivatives - Schedule of Derivatives Not Designated as Hedging Instruments (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) MMBTU Boe | Dec. 31, 2023 USD ($) Boe MMBTU
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 523,133 | $ 610,920
Derivative liabilities - Fair value | 545,885 | 613,314
Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 10,994,794 | 11,362,194
Derivative assets - Fair value | 39,718 | 43,195
Derivative liabilities - Fair value | 416,216 | 419,499
Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 11,212,047 | 11,852,864
Derivative assets - Fair value | 429,029 | 433,969
Derivative liabilities - Fair value | 33,999 | 43,877
Interest rate contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 8,493,839 | 8,681,085
Derivative assets - Fair value | 11,908 | 26,089
Derivative liabilities - Fair value | 366,649 | 394,625
Interest rate contracts | Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 8,511,542 | 8,706,824
Derivative assets - Fair value | 367,756 | 397,397
Derivative liabilities - Fair value | 12,312 | 26,187
Interest rate contracts | Swaps | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 6,854,372 | 6,835,822
Derivative assets - Fair value | 11,828 | 25,649
Derivative liabilities - Fair value | 361,256 | 377,388
Interest rate contracts | Swaps | Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 6,872,075 | 6,861,561
Derivative assets - Fair value | 362,323 | 380,123
Derivative liabilities - Fair value | 12,228 | 25,731
Interest rate contracts | Written options | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 1,458,428 | 1,522,531
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 4,953 | 12,756
Interest rate contracts | Collars and corridors | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 181,039 | 322,732
Derivative assets - Fair value | 80 | 440
Derivative liabilities - Fair value | 440 | 4,481
Interest rate contracts | Collars and corridors | Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 181,039 | 322,732
Derivative assets - Fair value | 443 | 4,491
Derivative liabilities - Fair value | 84 | 456
Interest rate contracts | Purchased options | Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 1,458,428 | 1,522,531
Derivative assets - Fair value | 4,990 | 12,783
Derivative liabilities - Fair value | 0 | 0
Foreign exchange contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 2,500,955 | 2,681,109
Derivative assets - Fair value | 27,810 | 17,106
Derivative liabilities - Fair value | 49,567 | 24,874
Foreign exchange contracts | Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 2,700,505 | 3,146,040
Derivative assets - Fair value | 61,273 | 36,572
Derivative liabilities - Fair value | 21,687 | 17,690
Foreign exchange contracts | Swaps | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 1,504,469 | 1,588,491
Derivative assets - Fair value | 16,117 | 5,801
Derivative liabilities - Fair value | 25,366 | 18,118
Foreign exchange contracts | Swaps | Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 2,613,755 | 2,862,037
Derivative assets - Fair value | 58,955 | 36,280
Derivative liabilities - Fair value | 19,949 | 15,757
Foreign exchange contracts | Written options | Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 0 | 136,000
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 1,839
Foreign exchange contracts | Forwards and spot | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 996,486 | 956,618
Derivative assets - Fair value | 11,693 | 9,466
Derivative liabilities - Fair value | 24,201 | 6,756
Foreign exchange contracts | Forwards and spot | Economic hedges: |  |
Derivative [Line Items] |  |
Notional Amount | 86,750 | 148,003
Derivative assets - Fair value | 2,318 | 292
Derivative liabilities - Fair value | 1,738 | 94
Foreign exchange contracts | Purchased options | Customer-related positions: |  |
Derivative [Line Items] |  |
Notional Amount | 0 | 136,000
Derivative assets - Fair value | 0 | 1,839
Derivative liabilities - Fair value | 0 | 0
Commodity contracts | Customer-related positions: |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 25,609 | 6,014
Derivative liabilities - Fair value | 32,500 | 114,974
Commodity contracts | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 6,286 | 5,555
Derivative liabilities - Fair value | $ 10,236 | $ 20,548
Derivative, nonmonetary notional amount, energy measure | Boe | 10,307 | 9,243
Commodity contracts | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 19,323 | $ 459
Derivative liabilities - Fair value | $ 22,264 | $ 94,426
Derivative, nonmonetary notional amount, energy measure | MMBTU | 205,015 | 166,053
Commodity contracts | Economic hedges: |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 22,890 | $ 73,590
Derivative liabilities - Fair value | 12,828 | 6,696
Commodity contracts | Economic hedges: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 6,026 | 10,851
Derivative liabilities - Fair value | $ 3,969 | $ 6,391
Derivative, nonmonetary notional amount, energy measure | Boe | 10,307 | 9,388
Commodity contracts | Economic hedges: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 16,864 | $ 62,739
Derivative liabilities - Fair value | $ 8,859 | $ 305
Derivative, nonmonetary notional amount, energy measure | MMBTU | 201,711 | 162,791
Commodity contracts | Swaps | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 4,682 | $ 3,735
Derivative liabilities - Fair value | $ 6,874 | $ 15,445
Derivative, nonmonetary notional amount, energy measure | Boe | 4,830 | 3,277
Commodity contracts | Swaps | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 13,095 | $ 438
Derivative liabilities - Fair value | $ 17,708 | $ 73,793
Derivative, nonmonetary notional amount, energy measure | MMBTU | 141,736 | 118,325
Commodity contracts | Swaps | Economic hedges: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 4,479 | $ 9,166
Derivative liabilities - Fair value | $ 3,893 | $ 4,924
Derivative, nonmonetary notional amount, energy measure | Boe | 4,830 | 3,422
Commodity contracts | Swaps | Economic hedges: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 13,323 | $ 49,941
Derivative liabilities - Fair value | $ 5,056 | $ 305
Derivative, nonmonetary notional amount, energy measure | MMBTU | 139,136 | 116,463
Commodity contracts | Written options | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 167 | $ 0
Derivative liabilities - Fair value | $ 0 | $ 233
Derivative, nonmonetary notional amount, energy measure | MMBTU | 1,234 | 1,874
Commodity contracts | Collars | Customer-related positions: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 1,604 | $ 1,820
Derivative liabilities - Fair value | $ 3,362 | $ 5,103
Derivative, nonmonetary notional amount, energy measure | Boe | 5,477 | 5,966
Commodity contracts | Collars | Customer-related positions: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 6,061 | $ 21
Derivative liabilities - Fair value | $ 4,556 | $ 20,400
Derivative, nonmonetary notional amount, energy measure | MMBTU | 62,045 | 45,854
Commodity contracts | Collars | Economic hedges: | Crude Oil |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 1,547 | $ 1,685
Derivative liabilities - Fair value | $ 76 | $ 1,467
Derivative, nonmonetary notional amount, energy measure | Boe | 5,477 | 5,966
Commodity contracts | Collars | Economic hedges: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 3,541 | $ 12,565
Derivative liabilities - Fair value | $ 3,650 | $ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU | 61,341 | 44,454
Commodity contracts | Purchased options | Economic hedges: | Natural Gas |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 0 | $ 233
Derivative liabilities - Fair value | $ 153 | $ 0
Derivative, nonmonetary notional amount, energy measure | MMBTU | 1,234 | 1,874

X
- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5C -Subparagraph (SX 210.12-13C(Column F)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5C Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5B -Subparagraph (SX 210.12-13B(Column E)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-22 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
Name: | us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and elected not to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5C -Subparagraph (SX 210.12-13C(Column F)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5C Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 5B -Subparagraph (SX 210.12-13B(Column E)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-22 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
Name: | us-gaap_DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal energy measure used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:energyItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NotDesignatedAsHedgingInstrumentTradingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NotDesignatedAsHedgingInstrumentEconomicHedgeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_SwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ewbc_WrittenOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ewbc_CollarsandCorridorsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ewbc_PurchasedOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ewbc_ForwardAndSpotMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_EnergyAxis=srt_CrudeOilMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_EnergyAxis=srt_NaturalGasReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ewbc_CollarsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |