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STOCK-BASED COMPENSATION - Weighted-Average Assumptions for Options and ESPP Subscriptions Granted (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
 Option Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Average risk-free interest rate (as a percent) 3.00% 0.80% 3.00% 0.80%
Expected dividend yield 0.00% 0.00% 0.00% 0.00%
Expected volatility (as a percent) 31.40% 33.50% 31.40% 33.50%
Expected term (years) 5 years 5 years 5 years 5 years
Fair value, per option (in dollars per share) $ 35.07 $ 28.60 $ 35.08 $ 28.54
 ESPP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Average risk-free interest rate (as a percent) 1.10% 0.00% 0.30% 0.10%
Expected dividend yield 0.00% 0.00% 0.00% 0.00%
Expected volatility (as a percent) 31.50% 32.30% 32.10% 36.80%
Expected term (years) 7 months 6 days 7 months 6 days 7 months 6 days 7 months 6 days
Fair value, per option (in dollars per share) $ 23.63 $ 26.03 $ 28.63 $ 22.65