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Earnings per share (Tables) | 12 Months Ended
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Dec. 31, 2019
Text block [abstract] |
Income and Share Data Used in Basic and Diluted EPS Computations |
|  | 2017 |
|  | Amount after income tax |  |  | Weighted average number of ordinary shares outstanding |  |  | Earnings per share |
Basic earnings per share |  | NT$000 |  |  | In thousands |  |  | NT$ |
Profit attributable to: |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  |  |  |  |  |  |  |  |  |  |
- Continuing operations |  |  | 981,929 |  |  |  |  |  |  |  | 1.16 |
- Discontinued operations |  |  | 1,814,953 |  |  |  |  |  |  |  | 2.14 |
Equity holders of the Company |  |  | 2,796,882 |  |  |  | 846,686 |  |  |  | 3.30 |
Diluted earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Assumed conversion of all dilutive potential ordinary shares: |  |  |  |  |  |  |  |  |  |  |  |
Employees’ compensations |  |  |  |  |  |  | 14,034 |  |  |  |  |
Restricted shares |  |  |  |  |  |  | 5,075 |  |  |  |  |
Profit attributable to: |  |  |  |  |  |  |  |  |  |  |  |
Equity holders of the Company |  |  |  |  |  |  |  |  |  |  |  |
- Continuing operations |  |  | 981,929 |  |  |  |  |  |  |  | 1.13 |
- Discontinued operations |  |  | 1,814,953 |  |  |  |  |  |  |  | 2.10 |
Equity holders of the Company |  |  | 2,796,882 |  |  |  | 865,795 |  |  |  | 3.23 |
|  | 2018 |
|  | Amount after income tax |  |  | Weighted average number of ordinary shares outstanding |  |  | Earnings per share |
Basic earnings per share |  | NT$000 |  |  | In thousands |  |  | NT$ |
Profit attributable to the equity holders of the Company |  |  | 1,325,824 |  |  |  | 802,725 |  |  |  | 1.65 |
Diluted earnings per share |  |  |  |  |  |  |  |  |  |  |  |
Assumed conversion of all dilutive potential ordinary shares: |  |  |  |  |  |  |  |  |  |  |  |
Employees’ compensations |  |  |  |  |  |  | 7,626 |  |  |  |  |
Restricted shares |  |  |  |  |  |  | 3,356 |  |  |  |  |
Profit attributable to the equity holders of the Company |  |  | 1,325,824 |  |  |  | 813,707 |  |  |  | 1.63 |
|  | 2019 |
|  | Amount after income tax |  |  | Weighted average number of ordinary shares outstanding |  |  | Earnings per share |
Basic earnings per share |  | NT$000 |  |  | In thousands |  |  | NT$ |
Profit attributable to the equity holders of the Company |  |  | 2,508,574 |  |  |  | 727,111 |  |  |  | 3.45 |
Diluted earnings per share |  |  |  |  |  |  |  |  |
Assumed conversion of all dilutive potential ordinary shares: |  |  |  |  |  |  |  |  |  |  |  |
Employees’ compensations |  |  |  |  |  |  | 9,879 |  |  |  |  |
Restricted shares |  |  |  |  |  |  | 126 |  |  |  |  |
Profit attributable to the equity holders of the company |  |  | 2,508,574 |  |  |  | 737,116 |  |  |  | 3.40 |

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