v3.22.4
Employee future benefits - Future Benefits (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Employee Benefits Future Plans [Roll Forward]    
Net defined benefit liability (asset), beginning balance $ 1,894  
Other    
Net defined benefit liability (asset), ending balance 455 $ 1,894
Defined benefit pension plan    
Employee Benefits Future Plans [Roll Forward]    
Net defined benefit liability (asset), beginning balance 1,814 3,856
Included in profit or loss    
Current service cost 30 37
Interest cost (income) 50 93
Benefits payable 0 0
Future plan expense 80 130
Actuarial loss (gain) arising from:    
Demographic assumptions 0 56
Financial assumptions (4,547) (986)
Experience adjustment (91) 92
Return on plan assets excluding interest 3,092 (1,334)
Plan expenses 0 0
Remeasurement (gains) losses (1,546) (2,172)
Other    
Contributions paid by the employer 0 0
Benefits paid 0 0
Other total 0 0
Net defined benefit liability (asset), ending balance 348 1,814
Defined benefit pension plan | Defined benefit obligation    
Employee Benefits Future Plans [Roll Forward]    
Net defined benefit liability (asset), beginning balance 19,187 20,203
Included in profit or loss    
Current service cost 30 37
Interest cost (income) 518 476
Benefits payable 0 0
Future plan expense 548 513
Actuarial loss (gain) arising from:    
Demographic assumptions 0 56
Financial assumptions (4,547) (986)
Experience adjustment (91) 92
Return on plan assets excluding interest 0 0
Plan expenses (24) (30)
Remeasurement (gains) losses (4,662) (868)
Other    
Contributions paid by the employer 0 0
Benefits paid (671) (661)
Other total (671) (661)
Net defined benefit liability (asset), ending balance 14,402 19,187
Defined benefit pension plan | Fair value of plan assets    
Employee Benefits Future Plans [Roll Forward]    
Net defined benefit liability (asset), beginning balance (17,373) (16,347)
Included in profit or loss    
Current service cost 0 0
Interest cost (income) (468) (383)
Benefits payable 0 0
Future plan expense (468) (383)
Actuarial loss (gain) arising from:    
Demographic assumptions 0 0
Financial assumptions 0 0
Experience adjustment 0 0
Return on plan assets excluding interest 3,092 (1,334)
Plan expenses 24 30
Remeasurement (gains) losses 3,116 (1,304)
Other    
Contributions paid by the employer 0 0
Benefits paid 671 661
Other total 671 661
Net defined benefit liability (asset), ending balance (14,054) (17,373)
Net other post-retirement benefit plan liability    
Employee Benefits Future Plans [Roll Forward]    
Net defined benefit liability (asset), beginning balance 80 85
Included in profit or loss    
Interest cost (income) 2 1
Future plan expense 2 1
Actuarial loss (gain) arising from:    
Demographic assumptions 0 0
Financial assumptions (23) (2)
Experience adjustment 55 4
Remeasurement (gains) losses 32 2
Other    
Contributions paid by the employer (7) (8)
Benefits paid 0 0
Other total (7) (8)
Net defined benefit liability (asset), ending balance 107 80
Net other post-retirement benefit plan liability | Defined benefit obligation    
Employee Benefits Future Plans [Roll Forward]    
Net defined benefit liability (asset), beginning balance 80 85
Included in profit or loss    
Interest cost (income) 2 1
Future plan expense 2 1
Actuarial loss (gain) arising from:    
Demographic assumptions 0 0
Financial assumptions (23) (2)
Experience adjustment 55 4
Remeasurement (gains) losses 32 2
Other    
Contributions paid by the employer 0 0
Benefits paid (7) (8)
Other total (7) (8)
Net defined benefit liability (asset), ending balance 107 80
Net other post-retirement benefit plan liability | Fair value of plan assets    
Employee Benefits Future Plans [Roll Forward]    
Net defined benefit liability (asset), beginning balance 0 0
Included in profit or loss    
Interest cost (income) 0 0
Future plan expense 0 0
Actuarial loss (gain) arising from:    
Demographic assumptions 0 0
Financial assumptions 0 0
Experience adjustment 0 0
Remeasurement (gains) losses 0 0
Other    
Contributions paid by the employer (7) (8)
Benefits paid 7 8
Other total 0 0
Net defined benefit liability (asset), ending balance $ 0 $ 0