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Other Income (Expenses), Net - Summary of Other Income (Expenses), Net (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Analysis of income and expense [abstract]        
Gain on disposal of property, plant and equipment, net $ 18,431   $ 74,548 $ 33,935
Gain on disposal of scrapped materials 44,662   35,381 52,254
Gain on disposal of items purchased on behalf of others 12,729   19,107 21,945
Gains from lease modifications     139 891
Impairment loss on property, plant and equipment (9,236) $ (302) (12,721) (4,843)
Others 19,357   13,479 21,405
Other operating income (expense), Total $ 85,943 $ 2,807 $ 129,933 $ 125,587