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Stockholders' Equity and Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2020
Stockholders' Equity and Earnings Per Share [Abstract] |
Schedule of earnings per share calculations | The following table presents the basic and diluted EPS calculations for the three and nine months ended September 30, 2020 and 2019. For more information on the calculation of EPS, see Note 1 — Summary of Significant Accounting Policies — Significant Accounting Policies — Earnings Per Share to the Consolidated Financial Statements of the Company’s 2019 Form 10-K.
($ and shares in thousands, except per share data) |  | Three Months Ended September 30, |  | Nine Months Ended September 30, |  |  |
| 2020 |  | 2019 |  | 2020 |  | 2019 |  |  |
Basic: |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 159,537 |  |  | $ | 171,416 |  |  | $ | 403,713 |  |  | $ | 485,820 |  |  |  |
Basic weighted-average number of shares outstanding |  | 141,498 |  |  | 145,559 |  |  | 142,595 |  |  | 145,455 |  |  |  |
Basic EPS |  | $ | 1.13 |  |  | $ | 1.18 |  |  | $ | 2.83 |  |  | $ | 3.34 |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 159,537 |  |  | $ | 171,416 |  |  | $ | 403,713 |  |  | $ | 485,820 |  |  |  |
Basic weighted-average number of shares outstanding (1) |  | 141,498 |  |  | 145,559 |  |  | 142,595 |  |  | 145,455 |  |  |  |
Diluted potential common shares (2) |  | 545 |  |  | 561 |  |  | 487 |  |  | 633 |  |  |  |
Diluted weighted-average number of shares outstanding (1)(2) |  | 142,043 |  |  | 146,120 |  |  | 143,082 |  |  | 146,088 |  |  |  |
Diluted EPS |  | $ | 1.12 |  |  | $ | 1.17 |  |  | $ | 2.82 |  |  | $ | 3.33 |  |  |  |
(1)The Company acquired MetroCorp Bancshares, Inc. (“MetroCorp”) on January 17, 2014. Prior to the acquisition, MetroCorp had outstanding warrants to purchase 771,429 shares of its common stock. Upon the acquisition, the rights of the warrant holders were converted into the rights to acquire 230,282 shares of East West’s common stock until January 16, 2019. All warrants were exercised on January 7, 2019. (2)Includes dilutive shares from RSUs for the three and nine months ended September 30, 2020 and 2019.

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- Definition Stockholders' Equity and Earnings Per Share [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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