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Financial Assets at Fair Value Through Profit or Loss - Summary of Amounts recognized in Profit or Loss in Relation to Financial Assets at Fair Value Through Profit or Loss (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Dec. 31, 2022
TWD ($)
Financial Assets At Fair Value Through Profit Or Loss [line items]        
Financial assets mandatorily measured at fair value through profit or loss $ 48,101 $ 1,467 $ 39,254 $ (69,404)
Beneficiary certificates [member]        
Financial Assets At Fair Value Through Profit Or Loss [line items]        
Financial assets mandatorily measured at fair value through profit or loss 21,866   17,253 5,807
Listed stocks [member]        
Financial Assets At Fair Value Through Profit Or Loss [line items]        
Financial assets mandatorily measured at fair value through profit or loss $ 26,235   $ 22,001 $ (75,211)