XML 180 R157.htm IDEA: XBRL DOCUMENT v3.23.1
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, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Dec. 31, 2020
TWD ($)
Disclosure of detailed information about financial instruments [Line Items]        
Gains or losses recognized in profit or loss Recorded as non-operating income (expenses) $ 69,404 $ 2,259 $ (15,262) $ (24,015)
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 (46,419) $ (1,511) 122,514 140,199
Level 3 [member]        
Disclosure of detailed information about financial instruments [Line Items]        
Movement of financial instruments beginning balance 384,521   272,375  
Gains or losses recognized in profit or loss Recorded as non-operating income (expenses)     941  
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 (46,419)   122,514  
Sold in the period     (9,427)  
Movement of financial instruments ending balance 338,102   384,521 272,375
Level 3 [member] | Debt instruments [member]        
Disclosure of detailed information about financial instruments [Line Items]        
Movement of financial instruments beginning balance     10,368  
Gains or losses recognized in profit or loss Recorded as non-operating income (expenses)     941  
Sold in the period     (9,427)  
Movement of financial instruments ending balance       10,368
Level 3 [member] | Equity instruments [member]        
Disclosure of detailed information about financial instruments [Line Items]        
Movement of financial instruments beginning balance 384,521   262,007  
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 (46,419)   122,514  
Movement of financial instruments ending balance $ 338,102   $ 384,521 $ 262,007