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Inventories - Additional Information (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($)
Classes of current inventories [abstract] |  |  |  |
Cost of inventories recognized as operating costs | $ 534,314,001 | $ 17,387,374 | $ 458,345,579 | $ 398,068,260
Write-downs of inventories | $ 2,031,485 | $ 66,108 | $ 647,946 | $ 1,493,793

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