Contents of Significant Accounts - Earnings Per Share (Detail) $ / shares in Units, $ / shares in Units, shares in Thousands, $ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2025
TWD ($)
$ / shares
shares
|
Dec. 31, 2025
USD ($)
$ / shares
shares
|
Dec. 31, 2024
TWD ($)
$ / shares
shares
|
Dec. 31, 2023
TWD ($)
$ / shares
shares
|
|
| Earnings per share-basic | ||||
| Net income attributable to the parent company | $ 40,360,314 | $ 1,286,590 | $ 48,779,300 | $ 59,688,950 |
| Weighted-average number of ordinary shares for basic earnings per share (thousand shares) | 12,224,783 | 12,224,783 | 12,173,188 | 12,137,954 |
| Earnings per share-basic (NTD) | (per share) | $ 3.3 | $ 0.11 | $ 4.01 | $ 4.92 |
| Earnings per share-diluted | ||||
| Net income attributable to the parent company | $ 40,360,314 | $ 1,286,590 | $ 48,779,300 | $ 59,688,950 |
| Weighted-average number of ordinary shares for basic earnings per share (thousand shares) | 12,224,783 | 12,224,783 | 12,173,188 | 12,137,954 |
| Effect of dilution | ||||
| Restricted stocks for employees | 36,037 | 36,037 | 69,881 | 114,974 |
| Employees' compensation | 85,792 | 85,792 | 122,400 | 129,196 |
| Weighted-average number of ordinary shares after dilution (thousand shares) | 12,346,612 | 12,346,612 | 12,365,469 | 12,382,124 |
| Earnings per share-diluted (NTD) | (per share) | $ 3.27 | $ 0.1 | $ 3.94 | $ 4.82 |