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Significant Assets and Liabilities Denominated in Foreign Currencies - Summary of Realized and Unrealized Foreign Exchange Gain (Loss) (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Disclosure of detailed information about financial instruments [line items]        
Net Foreign Exchange Gain (Loss) $ (2,410,464) $ (78,440) $ 1,460,876 $ 1,056,639
US Dollar [member] | US dollar equals to New Taiwan dollar [member]        
Disclosure of detailed information about financial instruments [line items]        
Exchange Rate US$1=NT$30.71 US$1=NT$30.71 US$1=NT$27.68 US$1=NT$28.48
Net Foreign Exchange Gain (Loss) $ (347,044) $ (11,293) $ 132,582 $ (143,804)
New Taiwan Dollar [member]        
Disclosure of detailed information about financial instruments [line items]        
Net Foreign Exchange Gain (Loss) $ (2,985,318) $ (97,147) $ 1,413,969 $ 1,382,067
Chinese Yuan [member] | Chinese Yuan equals to New Taiwan dollar [member]        
Disclosure of detailed information about financial instruments [line items]        
Exchange Rate RMB1=NT$4.4094 RMB1=NT$4.4094 RMB1=NT$4.3415 RMB1=NT$4.3648
Net Foreign Exchange Gain (Loss) $ 921,898 $ 30,000 $ (85,675) $ (181,624)