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Related Party Transactions - Summary of Compensation to Key Management Personnel (Detail)
$ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2019
TWD ($)
Disclosure of transactions between related parties [abstract]        
Short-term employee benefits $ 1,744,903 $ 62,902 $ 1,264,980 $ 1,027,191
Post-employment benefits 3,505 126 2,007 2,208
Share-based payments 163,697 5,901 153,774 134,544
Total $ 1,912,105 $ 68,929 $ 1,420,761 $ 1,163,943