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Regulatory Requirements and Matters (Tables)
 12 Months Ended
Dec. 31, 2018
Banking and Thrift [Abstract]  
Schedule of regulatory capital information
The following table presents the regulatory capital information of the Company and the Bank as of December 31, 2018 and 2017:
 
 
 
Basel III
 
 
December 31, 2018
 
December 31, 2017
($ in thousands)
 
Actual
 
Minimum
Capital
   Ratios (3)
 
Well
Capitalized
Requirement
 
Actual
 
Minimum
Capital
   Ratios (3)
 
Well
Capitalized
Requirement
 
Amount
 
Ratio
 
Ratio
 
Ratio
 
Amount
 
Ratio
 
Ratio
 
Ratio
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Company
 
$
4,438,730

 
13.7
%
 
9.88
%
 
10.0
%
 
$
3,838,516

 
12.9
%
 
9.25
%
 
10.0
%
East West Bank
 
$
4,268,616

 
13.1
%
 
9.88
%
 
10.0
%
 
$
3,679,261

 
12.4
%
 
9.25
%
 
10.0
%
Tier 1 capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Company
 
$
3,966,842

 
12.2
%
 
7.88
%
 
8.0
%
 
$
3,390,070

 
11.4
%
 
7.25
%
 
8.0
%
East West Bank
 
$
3,944,728

 
12.1
%
 
7.88
%
 
8.0
%
 
$
3,378,815

 
11.4
%
 
7.25
%
 
8.0
%
CET1 capital (to risk-weighted assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Company
 
$
3,966,842

 
12.2
%
 
6.38
%
 
6.5
%
 
$
3,390,070

 
11.4
%
 
5.75
%
 
6.5
%
East West Bank
 
$
3,944,728

 
12.1
%
 
6.38
%
 
6.5
%
 
$
3,378,815

 
11.4
%
 
5.75
%
 
6.5
%
Tier 1 leverage capital (to adjusted average assets)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Company (1)
 
$
3,966,842

 
9.9
%
 
4.0
%
 
N/A

 
$
3,390,070

 
9.2
%
 
4.0
%
 
N/A

East West Bank
 
$
3,944,728

 
9.8
%
 
4.0
%
 
5.0
%
 
$
3,378,815

 
9.2
%
 
4.0
%
 
5.0
%
Risk-weighted assets
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Company
 
$
32,497,296

 
N/A

 
N/A

 
N/A

 
$
29,669,251

 
N/A

 
N/A

 
N/A

East West Bank
 
$
32,477,002

 
N/A

 
N/A

 
N/A

 
$
29,643,711

 
N/A

 
N/A

 
N/A

Adjusted quarterly average total assets (2)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Company
 
$
40,636,402

 
N/A

 
N/A

 
N/A

 
$
37,307,975

 
N/A

 
N/A

 
N/A

East West Bank
 
$
40,611,215

 
N/A

 
N/A

 
N/A

 
$
37,283,273

 
N/A

 
N/A

 
N/A

 

(1)
The Tier 1 leverage capital well-capitalized requirement applies to the Bank only since there is no Tier 1 leverage ratio component in the definition of a well-capitalized bank-holding company.
(2)
Reflects adjusted average total assets for the years ended December 31, 2018 and 2017.
(3)
The CET1, Tier 1, and total capital minimum ratios include a transition capital conservation buffer of 1.875% and 1.25% for the years ended December 31, 2018 and 2017.
N/A — Not applicable