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Share-Based Employee Compensation - Amounts Recognized for Share-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total cost of share-based compensation included in income, before income tax $ 4,612 $ 1,861
Income tax benefit 1,106 428
Total cost of employee share-based compensation, after tax 3,506 1,433
Cost of products    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total cost of share-based compensation included in income, before income tax 226 156
Selling, general and administrative expenses    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total cost of share-based compensation included in income, before income tax 4,210 1,587
Research and development expenses    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Total cost of share-based compensation included in income, before income tax $ 176 $ 118