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Other Income (Expenses), Net - Summary of Other Income (Expenses), Net (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($)
Analysis of income and expense [abstract] |  |  |  |
Gain on disposal of property, plant and equipment, net | $ 74,548 |  | $ 33,935 | $ 48,070
Gain on disposal of scrapped materials | 35,381 |  | 52,254 | 51,077
Gain on disposal of items purchased on behalf of others | 19,107 |  | 21,945 | 30,140
Gains from lease modifications | 139 |  | 891 |
Impairment loss on property, plant and equipment | (12,721) | $ (414) | (4,843) |
Others | 13,479 |  | 21,405 | 6,291
Other operating income (expense), Total | $ 129,933 | $ 4,228 | $ 125,587 | $ 135,578

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