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Regulatory Requirements and Matters (Tables) | 12 Months Ended
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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.

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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 -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
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