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Share-based payment arrangements - Long term incentive plan 2017 (Cash-settled) (Details)
$ in Thousands
 12 Months Ended
Feb. 09, 2017
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Vesting period       5 years
Expense from share-based payment transactions with employees | $   $ 3,945 $ 2,411 $ 761
Long term incentive plan 2017 | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Equity instruments granted (in shares) 66,449      
Number of phantom stocks outstanding (in shares)   0    
Expense from share-based payment transactions with employees | $   $ 0 $ 0 $ 200
Long term incentive plan 2017 | Key management personnel of entity or parent | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Equity instruments granted (in shares) 66,449      
Tranche one | Key management personnel of entity or parent | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.30%    
Tranche one | Long term incentive plan 2017 | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.33%    
Tranche one | Long term incentive plan 2017 | Key management personnel of entity or parent | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.33%    
Vesting period   2 years    
Tranche two | Key management personnel of entity or parent | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.30%    
Tranche two | Long term incentive plan 2017 | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.33%    
Tranche two | Long term incentive plan 2017 | Key management personnel of entity or parent | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.33%    
Vesting period   3 years    
Tranche three | Key management personnel of entity or parent | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.30%    
Tranche three | Long term incentive plan 2017 | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.33%    
Tranche three | Long term incentive plan 2017 | Key management personnel of entity or parent | Phantom Share Units (PSUs)        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Annual vesting percentage   33.33%    
Vesting period   4 years