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STOCK-BASED COMPENSATION - Equity Awards (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
STOCK-BASED COMPENSATION    
Total intrinsic value of options exercised $ 4,900 $ 7,200
Stock units expected to vest (in shares) 15,723  
Total employee and non-employee share-based compensation expense included in income, before income tax $ 16,332 $ 18,362
Stock options    
STOCK-BASED COMPENSATION    
Weighted-average grant-date fair value of options granted (in dollars per share) $ 23.21 $ 25.78
Cash received from option exercises $ 4,500 $ 6,800
Total unrecognized compensation expense related to non-vested shares granted to employees $ 95,400  
Cost expected to be recognized over a weighted-average period 3 years 4 months 24 days  
Restricted stock units    
Weighted Average Grant-Date Fair Value    
Granted (in dollars per share) $ 73.45 $ 88.96
Restricted Stock Units and Performance Share Units    
STOCK-BASED COMPENSATION    
Total unrecognized compensation expense related to non-vested shares granted to employees $ 56,700  
Cost expected to be recognized over a weighted-average period 2 years 4 months 24 days  
Stock units expected to vest (in shares) 900  
Number of Shares    
Non-vested at the beginning of the period (in shares) 910  
Vested (in shares) (371)  
Forfeited/cancelled (in shares) (2)  
Non-vested at the end of the period (in shares) 1,021  
Weighted Average Grant-Date Fair Value    
Non-vested at the beginning of the period (in dollars per share) $ 69.02  
Vested (in dollars per share) 64.15  
Forfeited/cancelled (in dollars per share) 59.67  
Non-vested at the end of the period (in dollars per share) $ 72.17  
Restricted Stock Units and Performance Share Units | Granted 01/01/22 - 03/31/22    
Number of Shares    
Granted (in shares) 484  
Weighted Average Grant-Date Fair Value    
Granted (in dollars per share) $ 71.88  
Performance Share Units    
STOCK-BASED COMPENSATION    
Percentage of Target Performance Level 100.00%  
Performance Share Units | Maximum    
STOCK-BASED COMPENSATION    
Percentage of Target Performance Level 200.00%  
Performance Share Units | Minimum    
STOCK-BASED COMPENSATION    
Percentage of Target Performance Level 0.00%  
Other share-based awards    
STOCK-BASED COMPENSATION    
Total unrecognized compensation expense related to non-vested shares granted to employees $ 500  
Cost expected to be recognized over a weighted-average period 9 months 18 days