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Earnings Per Share | 9 Months Ended
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Sep. 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 September 30, |  | For the Nine Months Ended September 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
| (In thousands, except per share data)
Net income attributable to Amkor common stockholders | $ | 132,614 |  |  | $ | 306,081 |  |  | $ | 242,251 |  |  | $ | 601,522 |
Weighted-average number of common shares outstanding - basic | 245,740 |  |  | 244,744 |  |  | 245,571 |  |  | 244,581 |
Effect of dilutive securities: |  |  |  |  |  |  |
Share-based awards | 1,389 |  |  | 1,350 |  |  | 1,509 |  |  | 1,434 |
Weighted-average number of common shares outstanding - diluted | 247,129 |  |  | 246,094 |  |  | 247,080 |  |  | 246,015 |
Net income attributable to Amkor per common share: |  |  |  |  |  |  |
Basic | $ | 0.54 |  |  | $ | 1.25 |  |  | $ | 0.99 |  |  | $ | 2.46 |
Diluted | 0.54 |  |  | 1.24 |  |  | 0.98 |  |  | 2.45 |
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 September 30, |  | For the Nine Months Ended September 30,
| 2023 |  | 2022 |  | 2023 |  | 2022
| (In thousands)
Share-based awards | — |  |  | 324 |  |  | — |  |  | 306 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-3 + Details
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