XML 178 R157.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Financial Risk Management and Fair Values of Financial Instruments - Summary of Movements of Level 3 (Detail)
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
TWD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
TWD ($)
Dec. 31, 2021
TWD ($)
Disclosure of detailed information about financial instruments [Line Items]        
Gains or losses recognized in profit or loss Recorded as non-operating income (expenses) $ (39,254) $ (1,282) $ 69,404 $ (15,262)
Gains or losses recognized in other comprehensive gains (losses) Recorded as unrealized gain (loss) on valuation of financial assets at fair value through other comprehensive income (217,785) $ (7,113) (46,419) 122,514
Level 3 [member] | Debt instruments [member]        
Disclosure of detailed information about financial instruments [Line Items]        
Movement of financial instruments beginning balance 338,102   384,521  
Movement of financial instruments ending balance     338,102 $ 384,521
Level 3 [member] | Equity instruments [member]        
Disclosure of detailed information about financial instruments [Line Items]        
Movement of financial instruments beginning balance 338,102      
Gains or losses recognized in other comprehensive gains (losses) Recorded as unrealized gain (loss) on valuation of financial assets at fair value through other comprehensive income (217,785)   (46,419)  
Purchases 12,500      
Reclassified as investments accounted for using equity method (12,500)      
Movement of financial instruments ending balance $ 120,317   $ 338,102