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STOCK AWARD PLANS - Total Compensation Expense Recognized (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 27,929 $ 29,161 $ 52,535 $ 53,150
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 3,263 4,027 6,482 7,994
Stock awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 23,887 24,401 43,950 43,349
Company expense on ESPP discount        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 779 $ 733 $ 2,103 $ 1,807