Profit Before Income Tax - Summary of Other Operating Income and Expenses, Net (Detail) $ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2025
TWD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
TWD ($)
|
Dec. 31, 2023
TWD ($)
|
|
| Analysis of income and expense [abstract] | ||||
| Rental income | $ 467,986 | $ 14,918 | $ 702,916 | $ 692,010 |
| Gain on disposal of property, plant and equipment | 809,950 | 25,819 | 208,980 | 161,761 |
| Royalty income | 0 | 0 | 275,289 | 674,859 |
| Impairment loss (Notes 15, 18 and 19) | (593,874) | (18,931) | (133,880) | (146,570) |
| Others | (18,769) | (598) | 119,287 | (60,290) |
| Other operating income and expenses, net | $ 665,293 | $ 21,208 | $ 1,172,592 | $ 1,321,770 |