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Other Income (Expenses), Net - Summary of Other Income (Expenses), Net (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
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