Other Financial Assets - Summary of Other Financial Assets (Detail) $ in Thousands, $ in Thousands |
Dec. 31, 2025
TWD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
TWD ($)
|
|---|---|---|---|
| Disclosure of financial assets [Line Items] | |||
| Other financial assets | $ 5,868,433 | $ 187,072 | $ 5,677,922 |
| Current | 1,760,287 | 56,114 | 985,925 |
| Non-current | 4,108,146 | 130,958 | 4,691,997 |
| Total | 5,868,433 | 187,072 | 5,677,922 |
| Guarantee deposits [member] | |||
| Disclosure of financial assets [Line Items] | |||
| Other financial assets | 4,454,816 | 142,009 | 4,956,488 |
| Total | 4,454,816 | 142,009 | 4,956,488 |
| Time deposits with original maturity over three months [member] | |||
| Disclosure of financial assets [Line Items] | |||
| Other financial assets | 760,454 | 24,242 | 82,680 |
| Total | 760,454 | 24,242 | 82,680 |
| Pledged time deposits [member] | |||
| Disclosure of financial assets [Line Items] | |||
| Other financial assets | 545,940 | 17,403 | 513,582 |
| Total | 545,940 | 17,403 | 513,582 |
| Others [member] | |||
| Disclosure of financial assets [Line Items] | |||
| Other financial assets | 107,223 | 3,418 | 125,172 |
| Total | $ 107,223 | $ 3,418 | $ 125,172 |