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Earnings Per Share | 6 Months Ended
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Jun. 30, 2023
Earnings Per Share [Abstract] |
Earnings Per Share | Earnings Per Share Basic earnings per share (“EPS”) is computed by dividing net income attributable to Amkor common stockholders by the weighted-average number of common shares outstanding during the period. The weighted-average number of common shares outstanding is reduced for treasury stock. Diluted EPS is computed based on the weighted-average number of common shares outstanding plus the effect of dilutive potential common shares outstanding during the period. Dilutive potential common shares include outstanding stock options, performance-vested restricted stock units, time-vested restricted stock units and unvested restricted shares. The following table summarizes the computation of basic and diluted EPS:
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
| (In thousands, except per share data)
Net income attributable to Amkor common stockholders | $ | 64,286 |  |  | $ | 124,778 |  |  | $ | 109,637 |  |  | $ | 295,441 |
Weighted-average number of common shares outstanding - basic | 245,637 |  |  | 244,592 |  |  | 245,485 |  |  | 244,498 |
Effect of dilutive securities: |  |  |  |  |  |  |
Share-based awards | 1,327 |  |  | 1,263 |  |  | 1,561 |  |  | 1,440 |
Weighted-average number of common shares outstanding - diluted | 246,964 |  |  | 245,855 |  |  | 247,046 |  |  | 245,938 |
Net income attributable to Amkor per common share: |  |  |  |  |  |  |
Basic | $ | 0.26 |  |  | $ | 0.51 |  |  | $ | 0.45 |  |  | $ | 1.21 |
Diluted | 0.26 |  |  | 0.51 |  |  | 0.44 |  |  | 1.20 |
The following table summarizes the potential shares of common stock that were excluded from diluted EPS because the effect of including these potential shares was anti-dilutive:
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
| (In thousands)
Share-based awards | — |  |  | 367 |  |  | — |  |  | 290 |

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