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Other Financial Assets - Summary of Other Financial Assets (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
TWD ($)
Disclosure of financial assets [Line Items]      
Other financial assets $ 1,556,980 $ 56,128 $ 1,082,000
Current 140,857 5,078 551,655
Non-current 1,416,123 51,050 530,345
Pledged time deposits [member]      
Disclosure of financial assets [Line Items]      
Other financial assets 415,065 14,963 367,550
Guaranty deposits [member]      
Disclosure of financial assets [Line Items]      
Other financial assets 1,007,651 36,325 516,505
Time deposits with original maturity over three months [member]      
Disclosure of financial assets [Line Items]      
Other financial assets 60,499 2,181 35,988
Others [member]      
Disclosure of financial assets [Line Items]      
Other financial assets $ 73,765 $ 2,659 $ 161,957