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Non-current Financial Assets at Fair Value Through Other Comprehensive Income - Summary Amounts recognized in other comprehensive income in relation to the financial assets at fair value through other comprehensive income (Detail)
$ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Financial assets at fair value through other comprehensive income [abstract]        
Foreign unlisted stocks $ (217,785) $ (7,113) $ (46,419) $ 122,514