XML 156 R133.htm IDEA: XBRL DOCUMENT v3.23.1
Employee benefit expenses - Additional Information (Detail) - TWD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of defined benefit plans [Line Items]      
Accrued Employee Compensation $ 447,303 $ 673,387 $ 332,080
Accrued Directors remuneration $ 11,182 $ 25,690 $ 16,604
Defined benefit pension plan [Member]      
Disclosure of defined benefit plans [Line Items]      
Employees' compensation distribution rate 10.00%    
Director remuneration rate no more than 0.50%