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Stockholders' Equity - Statement of Stockholders' Equity (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (in shares) 49,447,473    
Beginning Balance $ 1,118,829 $ 1,383,717  
Stock-based compensation plans 2,497 5,178  
Net income (loss) (29,698) 37,583  
Other comprehensive income $ (25,871) (33,131)  
Ending Balance (in shares) 49,454,726    
Ending Balance $ 1,065,757 1,392,708 $ 1,383,717
Accounting Standards Update [Extensible List]     us-gaap:AccountingStandardsUpdate201613Member
Cumulative Effect, Period of Adoption, Adjustment      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance   $ (639)  
Ending Balance     $ (639)
Ordinary Shares      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (in shares) 49,447,000 49,411,000  
Beginning Balance $ 76,300 $ 76,257  
Stock-based compensation plans (in shares) 8,000 3,000  
Stock-based compensation plans $ 10 $ 2  
Ending Balance (in shares) 49,455,000 49,414,000 49,411,000
Ending Balance $ 76,310 $ 76,259 $ 76,257
Additional Paid-In Capital      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 1,768,156 1,734,870  
Stock-based compensation plans 2,251 5,003  
Ending Balance 1,770,407 1,739,873 1,734,870
Treasury Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (1,034) (1,263)  
Stock-based compensation plans 236 173  
Ending Balance (798) (1,090) (1,263)
Accumulated Other Comprehensive Income (Loss)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance 27,809 (19,392)  
Other comprehensive income (25,871) (33,131)  
Ending Balance 1,938 (52,523) (19,392)
Accumulated Deficit      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance (752,402) (406,755)  
Net income (loss) (29,698) 37,583  
Ending Balance $ (782,100) (369,811) (406,755)
Accumulated Deficit | Cumulative Effect, Period of Adoption, Adjustment      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning Balance   $ (639)  
Ending Balance     $ (639)