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STOCK-BASED COMPENSATION - Stock Options (Details)
 3 Months Ended
Mar. 31, 2022
$ / shares
shares
Options  
Outstanding, beginning balance (in shares) | shares 2,846,579
Exercised (in shares) | shares (214,772)
Outstanding, ending balance (in shares) | shares 2,631,807
Exercisable at current period-end (in shares) | shares 2,631,807
Weighted- average exercise price  
Weighted-average exercise price of options outstanding, beginning balance (in dollars per share) | $ / shares $ 72.87
Weighted-average exercise price of options exercised (in dollars per share) | $ / shares 64.58
Weighted-average exercise price of options outstanding, ending balance (in dollars per share) | $ / shares 73.55
Weighted-average exercise price of options exercisable at current period-end (in dollars per share) | $ / shares $ 73.55