Derivatives (Tables)

12 Months Ended

Dec. 31, 2025

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional and Fair Values of Derivatives

The following table presents the notional amounts and fair values of the Company’s derivatives as of December 31, 2025 and 2024. Certain derivative contracts are cleared through central clearing organizations where variation margin is applied daily as settlement to the fair values of the contracts. The fair values are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the application of variation margin payments as settlement to fair values of contracts cleared through central clearing organizations. Applying variation margin payments as settlement to the fair values of derivative contracts cleared through the London Clearing House (“LCH”) and the Chicago Mercantile Exchange (“CME”) resulted in reductions in the derivative asset and liability fair values of $16 million and $3 million, respectively, as of December 31, 2025. In comparison, applying variation margin payments as settlement to LCH- and CME-cleared derivative transactions resulted in reductions in the derivative asset and liability fair values of $17 million and $15 million, respectively, as of December 31, 2024. Total gross derivative asset and liability fair values are then adjusted to reflect the effects of legally enforceable master netting agreements and cash collateral received or paid. The resulting net derivative asset and liability fair values are included in Other assets and Accrued expenses and other liabilities, respectively, on the Consolidated Balance Sheet.

	December 31, 2025								December 31, 2024
			Fair Value								Fair Value
($ in thousands)	Notional Amount		Assets			Liabilities			Notional Amount		Assets			Liabilities
Derivatives designated as hedging instruments:
Cash flow hedges:
Interest rate contracts	$	4,250,000	$	39,997		$	139		$	5,250,000	$	5,647		$	35,211
Derivatives not designated as hedging instruments:
Interest rate contracts	$	18,987,277	$	258,561		$	256,731		$	17,005,381	$	379,664		$	378,961
Commodity contracts (1)	—		66,022			72,158			—		48,499			45,328
Foreign exchange contracts	4,550,101		44,340			43,160			5,201,460		89,083			71,254
Credit contracts (2)	303,421		25			51			168,999		1			12
Equity contracts	—		522		(3)	13,734		(4)	—		239		(3)	15,119		(4)
Total derivatives not designated as hedging instruments	$	23,840,799	$	369,470		$	385,834		$	22,375,840	$	517,486		$	510,674
Gross derivative assets/liabilities			$	409,467		$	385,973				$	523,133		$	545,885
Less: Master netting agreements			(74,138)			(74,138)					(111,124)			(111,124)
Less: Cash collateral received/paid			(183,387)			(27,502)					(316,168)			(1,160)
Net derivative assets/liabilities			$	151,942		$	284,333				$	95,841		$	433,601

(1)The notional amount of the Company’s commodity contracts totaled 16 million barrels of crude oil and 364 million units of natural gas, measured in million British thermal units (“MMBTUs”) as of December 31, 2025. In comparison, the notional amount of the Company’s commodity contracts totaled 21 million barrels of crude oil and 407 million MMBTUs of natural gas as of December 31, 2024.

(2)The notional amount for the credit contracts reflects the Company’s pro-rata share of the notional amount in the underlying derivative instruments in RPAs.

(3)The Company held warrant equity contracts in nine and eight private companies as of December 31, 2025 and 2024, respectively.

(4)Equity contracts classified as derivative liabilities consist of 349 thousand performance-based RSUs granted as part of EWBC’s consideration in an investment.

The following table presents the notional amounts and the gross fair values of the interest rate and foreign exchange derivatives entered into with customers and with third-party financial institutions as economic hedges to customers’ positions as of December 31, 2025 and 2024:

	December 31, 2025						December 31, 2024
			Fair Value						Fair Value
($ in thousands)	Notional Amount		Assets		Liabilities		Notional Amount		Assets		Liabilities
Customer-related positions:
Interest rate contracts:
Swaps	$	7,566,889	$	47,448	$	206,794	$	6,854,372	$	11,828	$	361,256
Written options	1,463,110		—		1,900		1,458,428		—		4,953
Collars and corridors	444,604		311		20		181,039		80		440
Subtotal	9,474,603		47,759		208,714		8,493,839		11,908		366,649
Foreign exchange contracts:
Forwards and spot	1,156,203		23,661		2,831		996,486		11,693		24,201
Swaps	785,956		13,272		661		1,504,469		16,117		25,366
Written options	63,460		—		73		—		—		—
Subtotal	2,005,619		36,933		3,565		2,500,955		27,810		49,567
Total	$	11,480,222	$	84,692	$	212,279	$	10,994,794	$	39,718	$	416,216
Economic hedges and other:
Interest rate contracts:
Swaps	$	7,604,959	$	208,860	$	47,682	$	6,872,075	$	362,323	$	12,228
Purchased options	1,463,110		1,922		—		1,458,428		4,990		—
Collars and corridors	444,605		20		335		181,039		443		84
Subtotal	9,512,674		210,802		48,017		8,511,542		367,756		12,312
Foreign exchange contracts:
Forwards and spot	234,278		1,602		3,498		86,750		2,318		1,738
Swaps	2,246,744		5,718		36,083		2,613,755		58,955		19,949
Purchased options	63,460		87		14		—		—		—
Subtotal	2,544,482		7,407		39,595		2,700,505		61,273		21,687
Total	$	12,057,156	$	218,209	$	87,612	$	11,212,047	$	429,029	$	33,999

The Company enters into energy commodity contracts with its customers in the oil and gas sector, which allow them to hedge against the risk of fluctuation in energy commodity prices. Offsetting contracts entered with third-party financial institutions are used as economic hedges to manage the Company’s exposure on its customer-related positions. The following table presents the notional amounts in units and the gross fair values of the commodity derivatives issued for customer-related positions and economic hedges as of December 31, 2025 and 2024:

	December 31, 2025						December 31, 2024
			Fair Value						Fair Value
($ and units in thousands)	Notional Units		Assets		Liabilities		Notional Units		Assets		Liabilities
Customer-related positions:
Commodity contracts:
Crude oil:
Swaps	4,255	Barrels	$	205	$	28,533	4,830	Barrels	$	4,682	$	6,874
Collars	3,747	Barrels	21		13,622		5,477	Barrels	1,604		3,362
Subtotal	8,002	Barrels	226		42,155		10,307	Barrels	6,286		10,236
Natural gas:
Swaps	112,599	MMBTUs	5,814		18,403		141,736	MMBTUs	13,095		17,708
Collars	71,945	MMBTUs	1,879		6,693		62,045	MMBTUs	6,061		4,556
Written options	—	MMBTUs	—		—		1,234	MMBTUs	167		—
Subtotal	184,544	MMBTUs	7,693		25,096		205,015	MMBTUs	19,323		22,264
Total			$	7,919	$	67,251			$	25,609	$	32,500
Economic hedges:
Commodity contracts:
Crude oil:
Swaps	4,255	Barrels	$	25,309	$	11	4,830	Barrels	$	4,479	$	3,893
Collars	3,747	Barrels	8,724		21		5,477	Barrels	1,547		76
Subtotal	8,002	Barrels	34,033		32		10,307	Barrels	6,026		3,969
Natural gas:
Swaps	110,506	MMBTUs	18,258		3,963		139,136	MMBTUs	13,323		5,056
Collars	68,965	MMBTUs	5,812		912		61,341	MMBTUs	3,541		3,650
Purchased options	—	MMBTUs	—		—		1,234	MMBTUs	—		153
Subtotal	179,471	MMBTUs	24,070		4,875		201,711	MMBTUs	16,864		8,859
Total			$	58,103	$	4,907			$	22,890	$	12,828

The following table presents the notional amounts and the gross fair values of RPAs sold and purchased outstanding as of December 31, 2025 and 2024:

	December 31, 2025						December 31, 2024
			Fair Value						Fair Value
($ in thousands)	Notional Amount		Assets		Liabilities		Notional Amount		Assets		Liabilities
RPAs — protection sold (1)	$	133,756	$	—	$	51	$	133,174	$	—	$	12
RPAs — protection purchased	169,665		25		—		35,825		1		—
Total RPAs	$	303,421	$	25	$	51	$	168,999	$	1	$	12

(1)All reference entities of the protection sold RPAs were investment grade. The weighted-average remaining maturities were 2.7 years and 1.6 years as of December 31, 2025 and 2024, respectively.

Schedule of Pre-Tax Changes in AOCI from Cash Flows Hedges

The following table presents the pre-tax changes in AOCI from cash flow hedges for the years ended December 31, 2025, 2024 and 2023. The after-tax impact of cash flow hedges on AOCI is shown in Note 15 — Accumulated Other Comprehensive (Loss) Income to the Consolidated Financial Statements in this Form 10-K.

	Year Ended December 31,
($ in thousands)	2025		2024		2023
Gains (losses) recognized in AOCI:
Interest rate contracts	$	48,016	$	(124,382)	$	(5,767)
Losses (gains) reclassified from AOCI into earnings:
Interest expense (for cash flow hedges on borrowings)	$	—	$	—	$	(696)
Interest and dividend income (for cash flow hedges on loans)	20,959		91,083		82,153
Noninterest income	—		—		(1,614)		(1)
Total	$	20,959	$	91,083	$	79,843

(1)Represents the amounts in AOCI reclassified into earnings resulting from forecasted cash flows that were no longer probable to occur.

Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss)

The following table presents the pre-tax gains recognized in AOCI on net investment hedges for the years ended December 31, 2025, 2024 and 2023:

	Year Ended December 31,
($ in thousands)	2025		2024		2023
Gains recognized in AOCI	$	—	$	586	$	2,571

Schedule of Net Gains (Losses) Recognized on the Consolidated Statements of Income Related to Derivatives not Designated as Hedging Instruments

The following table presents the net gains (losses) due to fair value changes that are recognized on the Company’s Consolidated Statement of Income related to derivatives not designated as hedging instruments for the years ended December 31, 2025, 2024 and 2023:

		Year Ended December 31,
($ in thousands)	Classification on Consolidated Statement of Income	2025		2024		2023
Derivatives not designated as hedging instruments:
Interest rate contracts	Customer derivative income, net of mark-to-market adjustments	$	(3,142)	$	549	$	(2,989)
Foreign exchange contracts	Foreign exchange income	52,295		54,073		52,817
Credit contracts	Customer derivative income, net of mark-to-market adjustments	(15)		—		(1)
Equity contracts - warrants	Lending and loan servicing fees	283		(97)		13
Equity contracts - performance-based RSUs	Other investment income	1,385		—		—
Commodity contracts	Customer derivative income, net of mark-to-market adjustments	960		929		(25)
Net gains		$	51,766	$	55,454	$	49,815

Schedule of Gross Derivative Fair Values, the Balance Sheet Netting Adjustments and Net Fair Values on the Consolidated Balance Sheets, As Well As the Cash and Non-Cash Collateral

The following tables present the gross derivative fair values, the balance sheet netting adjustments, and the resulting net fair values recorded on the Consolidated Balance Sheet, as well as the cash and noncash collateral associated with master netting arrangements. The gross fair values of derivative assets and liabilities are presented after the application of variation margin payments as settlements to the fair values of contracts cleared through central clearing organizations, where applicable. The collateral amounts in the following tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of over-collateralization are not shown:

($ in thousands)	As of December 31, 2025
			Gross Amounts Offset on the Consolidated Balance Sheet				Net Amounts Presented on the Consolidated Balance Sheet		Gross Amounts Not Offset on the Consolidated Balance Sheet
	Gross Amounts Recognized (1)		Master Netting Arrangements		Cash Collateral Received (3)				Security Collateral Received (5)		Net Amount
Derivative assets	$	409,467	$	(74,138)	$	(183,387)	$	151,942	$	(42,779)	$	109,163
			Gross Amounts Offset on the Consolidated Balance Sheet				Net Amounts Presented on the Consolidated Balance Sheet		Gross Amounts Not Offset on the Consolidated Balance Sheet
	Gross Amounts Recognized (2)		Master Netting Arrangements		Cash Collateral Pledged (4)				Security Collateral Pledged (5)		Net Amount
Derivative liabilities	$	385,973	$	(74,138)	$	(27,502)	$	284,333	$	—	$	284,333

($ in thousands)	As of December 31, 2024
			Gross Amounts Offset on the Consolidated Balance Sheet				Net Amounts Presented on the Consolidated Balance Sheet		Gross Amounts Not Offset on the Consolidated Balance Sheet
	Gross Amounts Recognized (1)		Master Netting Arrangements		Cash Collateral Received (3)				Security Collateral Received (5)		Net Amount
Derivative assets	$	523,133	$	(111,124)	$	(316,168)	$	95,841	$	(55,222)	$	40,619
			Gross Amounts Offset on the Consolidated Balance Sheet				Net Amounts Presented on the Consolidated Balance Sheet		Gross Amounts Not Offset on the Consolidated Balance Sheet
	Gross Amounts Recognized (2)		Master Netting Arrangements		Cash Collateral Pledged (4)				Security Collateral Pledged (5)		Net Amount
Derivative liabilities	$	545,885	$	(111,124)	$	(1,160)	$	433,601	$	—	$	433,601

(1)Includes $9 million and $4 million of gross fair value assets with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2025 and 2024, respectively.

(2)Includes $16 million and $27 million of gross fair value liabilities with counterparties that were not subject to enforceable master netting arrangements or similar agreements as of December 31, 2025 and 2024, respectively.

(3)Gross cash collateral received under master netting arrangements or similar agreements were $184 million and $322 million as of December 31, 2025 and 2024, respectively. Of the gross cash collateral received, $183 million and $316 million were used to offset against derivative assets as of December 31, 2025 and 2024, respectively.

(4)Gross cash collateral pledged under master netting arrangements or similar agreements were $29 million and $1 million as of December 31, 2025 and 2024, respectively. Of the gross cash collateral pledged, $28 million and $1 million were used to offset against derivative liabilities as of December 31, 2025 and 2024, respectively.

(5)Represents the fair value of security collateral received or pledged limited to derivative assets or liabilities that are subject to enforceable master netting arrangements or similar agreements. U.S. GAAP does not permit the netting of noncash collateral on the Consolidated Balance Sheet but requires the disclosure of such amounts.