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Related Party Transactions - Key Management Personnel Compensation (Detail) - TWD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of transactions between related parties [abstract]      
Salaries and other short-term employee benefits $ 211,620 $ 243,405 $ 186,854
Post-employment compensation 2,197 2,156 4,258
Total key management personnel compensation $ 213,817 $ 245,561 $ 191,112