| Computation of basic and diluted earnings per share |
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, | | 2012 | | 2011 | | 2012 | | 2011 | | (In thousands, except per share data) | Net income attributable to Amkor | $ | 22,317 |
| | $ | 27,367 |
| | $ | 34,672 |
| | $ | 66,958 |
| Income allocated to participating securities | (55 | ) | | (106 | ) | | (81 | ) | | (259 | ) | Net income available to Amkor common stockholders | 22,262 |
| | 27,261 |
| | 34,591 |
| | 66,699 |
| Adjustment for dilutive securities on net income: | |
| | |
| | |
| | |
| Net income allocated to participating securities in basic calculation | 55 |
| | 106 |
| | 81 |
| | 259 |
| Interest on 6.0% convertible notes due 2014, net of tax | 4,026 |
| | 4,026 |
| | 12,077 |
| | 12,077 |
| Net income attributable to Amkor — diluted | $ | 26,343 |
| | $ | 31,393 |
| | $ | 46,749 |
| | $ | 79,035 |
| | | | | | | | | Weighted average shares outstanding — basic | 154,365 |
| | 195,364 |
| | 162,699 |
| | 195,510 |
| Effect of dilutive securities: | |
| | |
| | |
| | |
| Stock options and restricted share awards | 37 |
| | 46 |
| | 74 |
| | 361 |
| 6.0% convertible notes due 2014 | 82,658 |
| | 82,658 |
| | 82,658 |
| | 82,658 |
| Weighted average shares outstanding — diluted | 237,060 |
| | 278,068 |
| | 245,431 |
| | 278,529 |
| Net income attributable to Amkor per common share: | |
| | |
| | |
| | |
| Basic | $ | 0.14 |
| | $ | 0.14 |
| | $ | 0.21 |
| | $ | 0.34 |
| Diluted | 0.11 |
| | 0.11 |
| | 0.19 |
| | 0.28 |
|
|
| Antidilutive effect of potential shares of common stock that were excluded from diluted earnings per share |
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 antidilutive: | | | | | | | | | | | | | | For the Three Months Ended
September 30, | | For the Nine Months Ended
September 30, | | 2012 | | 2011 | | 2012 | | 2011 | | (In thousands) | Stock options and restricted share awards | 4,856 |
| | 6,122 |
| | 4,597 |
| | 5,158 |
| 6.25% convertible notes due 2013 | — |
| | — |
| | — |
| | 929 |
| 2.5% convertible notes due 2011 | — |
| | — |
| | — |
| | 1,459 |
| Total potentially dilutive shares | 4,856 |
| | 6,122 |
| | 4,597 |
| | 7,546 |
|
|