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STOCK-BASED COMPENSATION - Equity Awards (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
STOCK-BASED COMPENSATION              
Total employee and non-employee share-based compensation expense included in income, before income tax         $ 70,483 $ 70,289 $ 63,356
Compensation cost charged against income              
Operating expenses         70,483 70,289 63,356
Less: Amount of income tax benefit recognized in earnings         (14,228) (15,499) (36,326)
Amount charged against net income         56,255 54,790 27,030
Operating expense              
STOCK-BASED COMPENSATION              
Total employee and non-employee share-based compensation expense included in income, before income tax         $ 70,500 $ 70,300 $ 63,400
Stock options              
STOCK-BASED COMPENSATION              
Weighted-average grant-date fair value of options granted (in dollars per share)         $ 25.80 $ 18.82 $ 20.17
Total intrinsic value of options exercised         $ 51,200 $ 68,800 $ 220,200
Cash received from option exercises         45,700 $ 72,900 $ 92,400
Total unrecognized compensation expense related to non-vested shares granted to employees $ 51,300       $ 51,300    
Cost expected to be recognized over a weighted-average period         2 years 1 month 6 days    
Stock units expected to vest (in shares) 13,633       13,633    
Restricted stock units              
STOCK-BASED COMPENSATION              
Total unrecognized compensation expense related to non-vested shares granted to employees $ 34,800       $ 34,800    
Cost expected to be recognized over a weighted-average period         1 year 10 months 24 days    
Stock units expected to vest (in shares) 800       800    
Number of Shares              
Non-vested at the beginning of the period (in shares)       947 947    
Granted (in shares) 1 1 14 304      
Vested (in shares)         (344)    
Forfeited/cancelled (in shares)         (13)    
Non-vested at the end of the period (in shares) 910       910 947  
Weighted Average Grant-Date Fair Value              
Non-vested at the beginning of the period (in dollars per share)       $ 60.52 $ 60.52    
Granted (in dollars per share) $ 89.95 $ 89.84 $ 92.14 $ 86.28 89.12 $ 62.97 $ 59.79
Vested (in dollars per share)         62.29    
Forfeited/cancelled (in dollars per share)         60.41    
Non-vested at the end of the period (in dollars per share) $ 69.02       $ 69.02 $ 60.52  
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%    
Incentive Stock Options.              
STOCK-BASED COMPENSATION              
Total employee and non-employee share-based compensation expense included in income, before income tax         $ 8,300 $ 9,400 $ 10,000
Non Qualified Stock Options.              
STOCK-BASED COMPENSATION              
Total employee and non-employee share-based compensation expense included in income, before income tax         60,600 58,200 $ 53,400
Other share-based awards              
STOCK-BASED COMPENSATION              
Total unrecognized compensation expense related to non-vested shares granted to employees $ 700       $ 700    
Cost expected to be recognized over a weighted-average period         1 year    
Total employee and non-employee share-based compensation expense included in income, before income tax         $ 1,600 $ 2,700