XML 168 R145.htm IDEA: XBRL DOCUMENT v3.21.1
Employee benefit expenses - Summary of Employee benefit expenses (Detail) - TWD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Classes of employee benefits expense [abstract]      
Salaries $ 4,937,591 $ 5,114,790 $ 4,628,039
Director's remuneration 28,229 26,266 18,456
Labor and health insurance 396,796 422,106 406,111
Pension 189,489 194,173 201,567
Share-based payments   822 41,043
Other personnel expenses 458,122 317,616 311,617
Total Employee benefit expenses $ 6,010,227 $ 6,075,773 $ 5,606,833