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STOCK-BASED COMPENSATION - Compensation Expense (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Restricted Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award    
Compensation expense $ 21,579 $ 16,353
Fair value of units vested 20,778 10,696
Intrinsic value of units vested 28,259 12,821
Options    
Share-based Compensation Arrangement by Share-based Payment Award    
Compensation expense 227 1,251
Compensation expense, net of tax 174 951
Grant date fair value of options vested 2,421 7,565
Options | Selling Research And Development And Administrative Expenses    
Share-based Compensation Arrangement by Share-based Payment Award    
Compensation expense 185 1,051
Options | Cost of Sales    
Share-based Compensation Arrangement by Share-based Payment Award    
Compensation expense $ 42 $ 200