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Regulatory Requirements and Matters (Tables) | 12 Months Ended
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Dec. 31, 2021
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, 2021 and 2020:
($ in thousands) |  | Basel III
| December 31, 2021 |  | December 31, 2020 |  | 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 |  | $ | 6,124,827 |  |  | 14.1 | % |  |  |  |  |  | $ | 5,510,640 |  |  | 14.3 | % |  | 8.0 | % |  | 10.5 | % |  | 10.0 | %
East West Bank |  | $ | 5,766,734 |  |  | 13.2 | % |  |  |  |  |  | $ | 5,143,246 |  |  | 13.4 | % |  | 8.0 | % |  | 10.5 | % |  | 10.0 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 5,559,357 |  |  | 12.8 | % |  |  |  |  |  | $ | 4,882,555 |  |  | 12.7 | % |  | 6.0 | % |  | 8.5 | % |  | 6.0 | %
East West Bank |  | $ | 5,349,264 |  |  | 12.3 | % |  |  |  |  |  | $ | 4,662,426 |  |  | 12.1 | % |  | 6.0 | % |  | 8.5 | % |  | 8.0 | %
CET1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 5,559,357 |  |  | 12.8 | % |  |  |  |  |  | $ | 4,882,555 |  |  | 12.7 | % |  | 4.5 | % |  | 7.0 | % |  | 6.5 | %
East West Bank |  | $ | 5,349,264 |  |  | 12.3 | % |  |  |  |  |  | $ | 4,662,426 |  |  | 12.1 | % |  | 4.5 | % |  | 7.0 | % |  | 6.5 | %
Tier 1 leverage capital (to adjusted average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company (1) |  | $ | 5,559,357 |  |  | 9.0 | % |  |  |  |  |  | $ | 4,882,555 |  |  | 9.4 | % |  | 4.0 | % |  | 4.0 | % |  | N/A
East West Bank |  | $ | 5,349,264 |  |  | 8.6 | % |  |  |  |  |  | $ | 4,662,426 |  |  | 9.0 | % |  | 4.0 | % |  | 4.0 | % |  | 5.0 | %
Risk-weighted assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 43,585,105 |  |  | N/A |  |  |  |  |  | $ | 38,406,071 |  |  | N/A |  | N/A |  | N/A |  | N/A
East West Bank |  | $ | 43,572,086 |  |  | N/A |  |  |  |  |  | $ | 38,481,275 |  |  | N/A |  | N/A |  | N/A |  | N/A
Adjusted quarterly average total assets (2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 62,387,003 |  |  | N/A |  |  |  |  |  | $ | 52,540,964 |  |  | N/A |  | N/A |  | N/A |  | N/A
East West Bank |  | $ | 62,366,514 |  |  | N/A |  |  |  |  |  | $ | 52,594,313 |  |  | 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, 2021 and 2020. (3)Includes a 2.5% capital conservation buffer requirement above the minimum risk-based capital ratios. N/A — Not applicable.

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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