XML 119 R99.htm IDEA: XBRL DOCUMENT v3.22.0.1
Employee future benefits - Included in comprehensive income (loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of net defined benefit liability (asset) [line items]    
Actuarial gain (loss) on defined benefit plans $ 2,170 $ (289)
Pension Plan    
Disclosure of net defined benefit liability (asset) [line items]    
Actuarial gain (loss) on defined benefit plans 2,172 (281)
Other post-retirement benefit plan    
Disclosure of net defined benefit liability (asset) [line items]    
Actuarial gain (loss) on defined benefit plans $ (2) $ (8)