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Pension obligations (Tables)
12 Months Ended
Dec. 31, 2022
Pension Obligations [Abstract]  
Disclosure of additional information about defined benefit plans [Table Text Block]
    Year ended  
    Dec. 31, 2022     Dec. 31, 2021  
Opening defined benefit obligation: $ 216,369   $ 240,354  
Current service costs   9,392     11,295  
Curtailment (note 6b, 6e)   (583 )   -  
Past service cost (note 6b, 6e)   -     4,989  
Interest cost   5,938     6,172  
Benefits paid from plan   (18,637 )   (22,546 )
Benefits paid from employer   (1,787 )   (866 )
Participant contributions   25     34  
Effects of movements in exchange rates   (16,883 )   950  
Remeasurement actuarial losses/(gains):            
Arising from changes in demographic assumptions   -     1,498  
Arising from changes in financial assumptions   (48,960 )   (24,663 )
Arising from experience adjustments   255     (848 )
Closing defined benefit obligation $ 145,129   $ 216,369  
Disclosure of detailed information about defined benefit plans, balance by member group [Table Text Block]
    Dec. 31, 2022     Dec. 31, 2021  
Active members $ 112,951   $ 176,644  
Deferred members   2,439     2,538  
Retired members   29,739     37,187  
Closing defined benefit obligation $ 145,129   $ 216,369  

 

Disclosure of detailed information about changes in fair value of plan assets [Table Text Block]
    Year ended  
    Dec. 31, 2022     Dec. 31, 2021  
Opening fair value of plan assets: $ 199,645   $ 203,486  
Interest income   5,667     5,387  
Remeasurement adjustment:            
Loss on plan assets (excluding amounts included in net interest expense)   (40,196 )   (306

)

Contributions from the employer   6,063     12,750  
Employer direct benefit payments   1,787     866  
Contributions from plan participants   25     34  
Benefit payment from employer   (1,787 )   (866 )
Administrative expenses paid from plan assets   (80 )   (83 )
Benefits paid   (18,637 )   (22,546 )
Effects of changes in foreign exchange rates   (14,766

)

  923  
Closing fair value of plan assets $ 137,721   $ 199,645  
Disclosure of detailed information about net defined benefit liability (asset) [Table Text Block]
    Dec. 31, 2022     Dec. 31, 2021  
Present value of funded defined benefit obligation $ 131,503   $ 197,546  
Fair value of plan assets   (137,721 )   (199,645 )
Present value of unfunded defined benefit obligation   13,626     18,823  
Net liability arising from defined benefit obligation $ 7,408   $ 16,724  
Disclosure of detailed information about pension obligation [Table Text Block]
    Dec. 31, 2022     Dec. 31, 2021  
Pension obligation - current (note 14) $ 4,146   $ 10,472  
Pension obligation - non-current   3,262     6,252  
Total pension obligation $ 7,408   $ 16,724  
Disclosure of detailed information about pension expense [Table Text Block]
    Dec. 31, 2022     Dec. 31, 2021  
Service costs:            
Current service cost $ 9,392   $ 11,295  
(Curtailment) / past service cost   (583

)

  4,989  
Total service cost   8,809     16,284  
Net interest expense   271     785  
Administration cost   80     83  
Defined benefit pension expense $ 9,160   $ 17,152  
             
Defined contribution pension expense $ 2,097   $ 2,061  
Disclosure of detailed information about remeasurement on the net defined benefit liability [Table Text Block]
    Dec. 31, 2022     Dec. 31, 2021  
Loss on plan assets (excluding amounts included in net interest expense) $ 40,196   $ 306  
Actuarial losses arising from changes in demographic assumptions   -     1,498  
Actuarial gains arising from changes in financial assumptions   (48,960 )   (24,663

)

Actuarial losses (gains) arising from experience adjustments   255     (848 )
Defined benefit gain related to remeasurement $ (8,509 ) $ (23,707 )
             
Total pension cost $ 2,748   $ (4,494

)

Disclosure of detailed information about defined benefit plan, assumptions used [Table Text Block]
  2022 2021
Defined benefit cost:    
Discount rate - benefit obligations 3.09% 2.54%
Discount rate - service cost 3.21% 2.66%
Expected rate of salary increase1 2.75% 2.75%
Average longevity at retirement age for current pensioners (years)2 :    
Males 20.4 20.3
Females 23.7 23.7
Defined benefit obligation:    
Discount rate 5.22% 3.09%
Expected rate of salary increase1 3.50% 2.75%
Average longevity at retirement age for current pensioners (years)2 :    
Males 20.4 20.4
Females 23.8 23.7
Average longevity at retirement age for current employees (future pensioners) (years)2 :    
Males 22.3 22.2
Females 25.5 25.4
Disclosure of fair value of plan assets [Table Text Block]
December 31, 2022   Level 1     Level 2     Level 3     Total  
Investments:                        
Money market instruments $ 2,270   $ -   $ -   $ 2,270  
Pooled equity funds   50,107     -     -     50,107  
Pooled fixed income funds   -     64,230     -     64,230  
Alternative investment funds   -     20,908     -     20,908  
Balanced funds   -     206     -     206  
  $ 52,377   $ 85,344   $ -   $ 137,721  

 

December 31, 2021   Level 1     Level 2     Level 3     Total  
Investments:                        
Money market instruments $ 2,045   $ -   $ -   $ 2,045  
Pooled equity funds   78,092     -     -     78,092  
Pooled fixed income funds   -     97,229     -     97,229  
Alternative investment funds   -     21,983     -     21,983  
Balanced funds   -     296     -     296  
  $ 80,137   $ 119,508   $ -   $ 199,645