Regulatory Requirements and Matters (Tables)

12 Months Ended

Dec. 31, 2022

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, 2022 and 2021:

($ in thousands)	Basel III
	December 31, 2022				December 31, 2021				Minimum Capital  Ratios		Fully Phased-in Minimum Capital  Ratios (2)		Well- Capitalized Requirement
	Amount		Ratio		Amount		Ratio
Total capital (to risk-weighted assets)
Company	$	7,003,299	14.0	%	$	6,124,827	14.1	%	8.0	%	10.5	%	10.0	%
East West Bank	$	6,760,612	13.5	%	$	5,766,734	13.2	%	8.0	%	10.5	%	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	$	6,347,108	12.7	%	$	5,559,357	12.8	%	6.0	%	8.5	%	6.0	%
East West Bank	$	6,252,421	12.5	%	$	5,349,264	12.3	%	6.0	%	8.5	%	8.0	%
CET1 capital (to risk-weighted assets)
Company	$	6,347,108	12.7	%	$	5,559,357	12.8	%	4.5	%	7.0	%	6.5	%
East West Bank	$	6,252,421	12.5	%	$	5,349,264	12.3	%	4.5	%	7.0	%	6.5	%
Tier 1 leverage capital (to adjusted average assets)
Company (1)	$	6,347,108	9.8	%	$	5,559,357	9.0	%	4.0	%	4.0	%	N/A
East West Bank	$	6,252,421	9.7	%	$	5,349,264	8.6	%	4.0	%	4.0	%	5.0	%
Risk-weighted assets
Company	$	50,036,719	N/A		$	43,585,105	N/A		N/A		N/A		N/A
East West Bank	$	50,024,772	N/A		$	43,572,086	N/A		N/A		N/A		N/A
Adjusted quarterly average total assets
Company	$	65,221,597	N/A		$	62,387,003	N/A		N/A		N/A		N/A
East West Bank	$	65,198,267	N/A		$	62,366,514	N/A		N/A		N/A		N/A

N/A — Not applicable.

(1)The Tier 1 leverage capital well-capitalized requirement applies only to the Bank since there is no Tier 1 leverage 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.