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Non-current Financial Assets at Fair Value Through Other Comprehensive Income - Summary of Non-current Financial Assets at Fair Value Through Other Comprehensive Income (Detail) - TWD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Financial assets at fair value through other comprehensive income [line items]    
Designation of equity instruments $ 120,317 $ 338,102
Foreign unlisted stocks [member]    
Financial assets at fair value through other comprehensive income [line items]    
Designation of equity instruments 38,534 38,534
Valuation adjustments [member]    
Financial assets at fair value through other comprehensive income [line items]    
Designation of equity instruments $ 81,783 $ 299,568