EMPLOYEE BENEFIT PLANS - Option Plans Activity (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Shares  Under Option
Options outstanding, beginning balance (in shares) | shares	493
Granted (in shares) | shares	111
Exercised (in shares) | shares	(276)
Forfeited (in shares) | shares	(5)
Options outstanding, ending balance (in shares) | shares	323
Options exercisable, ending balance (in shares) | shares	100
Weighted-Average Exercise Price
Options outstanding, beginning balance (in dollars per share) | $ / shares	$ 250.46
Granted (in dollars per share) | $ / shares	350.79
Exercised (in dollars per share) | $ / shares	221.15
Forfeited (in dollars per share) | $ / shares	307.96
Options outstanding, ending balance (in dollars per share) | $ / shares	309.04
Options exercisable, ending balance (in dollars per share) | $ / shares	$ 277.51