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Valuation and qualifying accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period $ 263,087 $ 243,660 $ 273,968
Additions 26,671 83,405 28,694
Deductions (53,567) (53,719) (54,912)
Translation (14,992) (10,259) (4,090)
Balance at end of period 221,199 263,087 243,660
Allowance for doubtful accounts      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 943 23,076 25,539
Additions 814 937 8,524
Deductions (787) (22,929) (10,892)
Translation (96) (141) (95)
Balance at end of period 874 943 23,076
Allowance for doubtful accounts | Accounts Receivable      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 585    
Balance at end of period 542 585  
Allowance for doubtful accounts | Other receivables      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 358    
Balance at end of period 332 358  
Valuation allowance on deferred tax assets      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 235,196 194,426 219,920
Additions 2,403 65,077 2,375
Deductions (38,992) (18,870) (26,252)
Translation (12,368) (5,437) (1,617)
Balance at end of period 186,239 235,196 194,426
Provision for contingencies      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of period 26,948 26,158 28,509
Additions 23,454 17,391 17,795
Deductions (13,788) (11,920) (17,768)
Translation (2,528) (4,681) (2,378)
Balance at end of period 34,086 26,948 26,158
Legal Reserve Accrual      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Additions 22,555 15,330 17,441
Legal Reserve Reclassifications      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Additions 899 2,061  
Legal Reserve Settlements      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Deductions $ (13,788) $ (11,920) $ (17,768)