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Basis of Presentation, Use of Accounting Estimates and Significant Accounting Policies - Prior Period Reclassifications on the Condensed Consolidated Statements of Income (Loss) (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended 63 Months Ended
Dec. 02, 2020
Nov. 30, 2019
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]                            
Net sales     $ 270,064 $ 253,215 $ 264,483 $ 247,603 $ 269,555 $ 240,083 $ 182,206 $ 242,397 $ 1,035,365 $ 934,241 [1] $ 1,084,170 [1]  
Cost of sales - exclusive of amortization                     329,371 339,478 [1] 360,365 [1]  
Product remediation                     800 0 0  
Gross Profit     201,643 168,664 172,279 163,408 166,895 147,591 114,970 165,307 705,994 594,763 [1] 723,805 [1]  
Operating expenses:                            
Selling, general & administrative                     471,904 446,561 [1] 528,466 [1]  
Research & development                     183,414 152,902 [1] 146,849 [1]  
Merger and integration expenses                       0 0  
Restructuring expenses                       0 0  
Impairment of disposal group and loss on sale                     0 180,160 [1] 0 [1]  
Impairment of goodwill $ 21,300 $ 42,400                 0 21,269 [1],[2] 42,417 [1],[2] $ 63,700
Impairment of long-lived assets                     0 6,762 [1] 142,517 [1]  
Amortization of intangibles                       0 0  
Decommissioning provision                       0 0  
Litigation provision, net                       0 0  
Other operating expenses                     51,460 61,008 [1] 35,110 [1]  
Operating loss from continuing operations     $ 24,754 $ 16,422 $ (36,262) $ (5,698) $ (249,023) $ (7,552) $ (16,743) $ (581) (784) (273,899) [1] (171,554) [1]  
Interest income                     435 131 [1] 803 [1]  
Interest expense                     (50,151) (40,837) [1] (15,091) [1]  
Loss on debt extinguishment                     (60,238) (1,407) [1],[2] 0 [1],[2]  
Foreign exchange and other gains/(losses)                     (13,734) (32,010) [1] (2,536) [1]  
Loss from continuing operations before tax                     $ (124,472) (348,022) [1] (188,378) [1]  
As Revised                            
Error Corrections and Prior Period Adjustments Restatement [Line Items]                            
Net sales                       934,241 1,084,170  
Cost of sales - exclusive of amortization                       312,097 326,201  
Product remediation                       7,860 15,777  
Gross Profit                       614,284 742,192  
Operating expenses:                            
Selling, general & administrative                       427,770 506,478  
Research & development                       152,902 146,849  
Merger and integration expenses                       7,333 23,457  
Restructuring expenses                       7,571 12,254  
Impairment of disposal group and loss on sale                       180,160 0  
Impairment of goodwill                       21,269 42,417  
Impairment of long-lived assets                       6,762 142,517  
Amortization of intangibles                       38,312 40,375  
Decommissioning provision                       42,198 0  
Litigation provision, net                       3,906 (601)  
Other operating expenses                       0 0  
Operating loss from continuing operations                       (273,899) (171,554)  
Interest income                       131 803  
Interest expense                       (40,837) (15,091)  
Loss on debt extinguishment                       0 0  
Foreign exchange and other gains/(losses)                       (33,417) (2,536)  
Loss from continuing operations before tax                       (348,022) (188,378)  
Reclassifications                            
Error Corrections and Prior Period Adjustments Restatement [Line Items]                            
Net sales                       0 0  
Cost of sales - exclusive of amortization                       27,381 34,164  
Product remediation                       (7,860) (15,777)  
Gross Profit                       (19,521) (18,387)  
Operating expenses:                            
Selling, general & administrative                       18,791 21,988  
Research & development                       0 0  
Merger and integration expenses                       (7,333) (23,457)  
Restructuring expenses                       (7,571) (12,254)  
Impairment of disposal group and loss on sale                       0 0  
Impairment of goodwill                       0 0  
Impairment of long-lived assets                       0 0  
Amortization of intangibles                       (38,312) (40,375)  
Decommissioning provision                       (42,198) 0  
Litigation provision, net                       (3,906) 601  
Other operating expenses                       61,008 35,110  
Operating loss from continuing operations                       0 0  
Interest income                       0 0  
Interest expense                       0 0  
Loss on debt extinguishment                       (1,407) 0  
Foreign exchange and other gains/(losses)                       1,407 0  
Loss from continuing operations before tax                       $ 0 $ 0  
[1] The consolidated statements of income (loss) for the years ended December 31, 2020 and 2019 have been revised. For further details refer to “Note 1. Nature of Operations.”
[2] The consolidated statements of cash flows for the years ended December 31, 2020 and 2019 have been revised. For further details refer to “Note 1. Nature of Operations.”