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Financial instruments fair value - Changes in Fair Value (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance, beginning of period $ 5,600 $ 8,799 $ 10,100 $ 8,200
Additions 0 0 0 359
Net loss 100 3,937 188 4,237
Payments 0 (4,206) (4,588) (4,206)
Other 0 (230) 0 (290)
Balance, end of period $ 5,700 $ 8,300 $ 5,700 $ 8,300