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STOCK-BASED COMPENSATION (Summary of Employee Stock-Based Compensation Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense $ 21,255 $ 20,779 $ 21,550
Total estimated tax benefit related to stock-based compensation expense 9,420 10,430 15,448
Net effect on net income 11,835 10,349 6,102
Selling, general and administrative      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense 19,153 18,721 19,785
Research and development      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense 1,785 1,609 1,273
Cost of goods sold      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock-based compensation expense $ 317 $ 449 $ 492