Regulatory Requirements and Matters (Tables)

12 Months Ended

Dec. 31, 2023

Banking and Thrift, Interest [Abstract]

Schedule of Regulatory Capital Information

The following table presents the regulatory capital information of the Company and the Bank as of December 31, 2023 and 2022:

	Basel III
	December 31, 2023				December 31, 2022
($ in thousands)	Amount		Ratio		Amount		Ratio		Minimum Capital Ratios		Fully Phased-in Minimum Capital Ratios (2)		Well-Capitalized Requirement
Total capital (to risk-weighted assets)
Company	$	7,919,407	14.8	%	$	7,003,299	14.0	%	8.0	%	10.5	%	10.0	%
East West Bank	$	7,363,575	13.8	%	$	6,760,612	13.5	%	8.0	%	10.5	%	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	$	7,140,778	13.3	%	$	6,347,108	12.7	%	6.0	%	8.5	%	6.0	%
East West Bank	$	6,732,946	12.6	%	$	6,252,421	12.5	%	6.0	%	8.5	%	8.0	%
CET1 capital (to risk-weighted assets)
Company (1)	$	7,140,778	13.3	%	$	6,347,108	12.7	%	4.5	%	7.0	%	N/A
East West Bank	$	6,732,946	12.6	%	$	6,252,421	12.5	%	4.5	%	7.0	%	6.5	%
Tier 1 leverage capital (to adjusted average assets)
Company (1)	$	7,140,778	10.2	%	$	6,347,108	9.8	%	4.0	%	4.0	%	N/A
East West Bank	$	6,732,946	9.6	%	$	6,252,421	9.7	%	4.0	%	4.0	%	5.0	%
Risk-weighted assets
Company	$	53,663,392	N/A		$	50,036,719	N/A		N/A		N/A		N/A
East West Bank	$	53,539,980	N/A		$	50,024,772	N/A		N/A		N/A		N/A
Adjusted quarterly average total assets
Company	$	70,406,008	N/A		$	65,221,597	N/A		N/A		N/A		N/A
East West Bank	$	70,270,449	N/A		$	65,198,267	N/A		N/A		N/A		N/A

N/A — Not applicable.

(1)The well-capitalized requirements for CET1 capital and Tier 1 leverage capital apply only to the Bank since there is no CET1 capital ratio or Tier 1 leverage capital ratio component in the definition of a well-capitalized bank holding company.

(2)Includes a 2.5% capital conservation buffer requirement above the minimum risk-based capital ratios.