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Inventories - Additional Information (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Classes of current inventories [abstract] |  |  |  |
Cost of inventories recognized as operating costs | $ 496,631,340 | $ 15,145,817 | $ 488,429,585 | $ 534,314,001
Write-downs of inventories | $ 469,876 | $ 14,330 | $ 3,389,936 | $ 2,031,485

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