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Regulatory Requirements and Matters (Tables) | 12 Months Ended
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Dec. 31, 2025
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, 2025 and 2024:
|  | Basel III
|  | December 31, 2025 |  | December 31, 2024 (1) |  |  |  |  |  |
($ in thousands) |  | Amount |  | Ratio |  |  |  |  |  | Amount |  | Ratio |  | Minimum Regulatory Requirements |  | Minimum Regulatory Requirements including Capital Conservation Buffer (3) |  | Well-Capitalized Requirement
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 9,480,208 |  |  | 16.4 | % |  |  |  |  |  | $ | 8,561,797 |  |  | 15.6 | % |  | 8.0 | % |  | 10.5 | % |  | 10.0 | %
East West Bank |  | $ | 8,694,701 |  |  | 15.1 | % |  |  |  |  |  | $ | 8,053,389 |  |  | 14.7 | % |  | 8.0 | % |  | 10.5 | % |  | 10.0 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 8,721,523 |  |  | 15.1 | % |  |  |  |  |  | $ | 7,839,816 |  |  | 14.3 | % |  | 6.0 | % |  | 8.5 | % |  | 6.0 | %
East West Bank |  | $ | 7,973,536 |  |  | 13.9 | % |  |  |  |  |  | $ | 7,367,996 |  |  | 13.4 | % |  | 6.0 | % |  | 8.5 | % |  | 8.0 | %
CET1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company (2) |  | $ | 8,721,523 |  |  | 15.1 | % |  |  |  |  |  | $ | 7,839,816 |  |  | 14.3 | % |  | 4.5 | % |  | 7.0 | % |  | N/A
East West Bank |  | $ | 7,973,536 |  |  | 13.9 | % |  |  |  |  |  | $ | 7,367,996 |  |  | 13.4 | % |  | 4.5 | % |  | 7.0 | % |  | 6.5 | %
Tier 1 leverage capital (to adjusted quarterly average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company (2) |  | $ | 8,721,523 |  |  | 10.9 | % |  |  |  |  |  | $ | 7,839,816 |  |  | 10.4 | % |  | 4.0 | % |  | 4.0 | % |  | N/A
East West Bank |  | $ | 7,973,536 |  |  | 10.0 | % |  |  |  |  |  | $ | 7,367,996 |  |  | 9.8 | % |  | 4.0 | % |  | 4.0 | % |  | 5.0 | %
N/A — Not applicable. (1)Reflected a delay of the estimated impact of CECL on regulatory capital in accordance with regulatory capital rules. (2)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. (3)Includes a 2.5% capital conservation buffer requirement above the minimum risk-based capital ratios, where 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 -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 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/1943274/2147477270/942-505-50-1B + Details
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