Regulatory Requirements and Matters (Tables)

12 Months Ended

Dec. 31, 2020

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, 2020 and 2019:

($ in thousands)	Basel III
	December 31, 2020				December 31, 2019				Minimum Capital Ratios		Fully Phased-in Minimum Capital    Ratios (3)		Well- Capitalized Requirement
	Actual				Actual
	Amount		Ratio		Amount		Ratio		Ratio		Ratio		Ratio
Total capital (to risk-weighted assets)
Company	$	5,510,640	14.3	%	$	5,064,037	14.4	%	8.0	%	10.5	%	10.0	%
East West Bank	$	5,143,246	13.4	%	$	4,886,237	13.9	%	8.0	%	10.5	%	10.0	%
Tier 1 capital (to risk-weighted assets)
Company	$	4,882,555	12.7	%	$	4,546,592	12.9	%	6.0	%	8.5	%	8.0	%
East West Bank	$	4,662,426	12.1	%	$	4,516,792	12.9	%	6.0	%	8.5	%	8.0	%
CET1 capital (to risk-weighted assets)
Company	$	4,882,555	12.7	%	$	4,546,592	12.9	%	4.5	%	7.0	%	6.5	%
East West Bank	$	4,662,426	12.1	%	$	4,516,792	12.9	%	4.5	%	7.0	%	6.5	%
Tier 1 leverage capital (to adjusted average assets)
Company (1)	$	4,882,555	9.4	%	$	4,546,592	10.3	%	4.0	%	4.0	%	N/A
East West Bank	$	4,662,426	9.0	%	$	4,516,792	10.3	%	4.0	%	4.0	%	5.0	%
Risk-weighted assets
Company	$	38,406,071	N/A		$	35,136,427	N/A		N/A		N/A		N/A
East West Bank	$	38,481,275	N/A		$	35,127,920	N/A		N/A		N/A		N/A
Adjusted quarterly average total assets (2)
Company	$	52,540,964	N/A		$	44,449,802	N/A		N/A		N/A		N/A
East West Bank	$	52,594,313	N/A		$	44,419,308	N/A		N/A		N/A		N/A

(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)Reflects adjusted quarterly average total assets for the years ended December 31, 2020 and 2019.

(3)As of January 1, 2019, the 2.5% capital conservation buffer above the minimum risk-based capital ratios was required in order to avoid limitations on distributions, including dividend payments and certain discretionary bonus payments to executive officers.

N/A — Not applicable.