STOCK-BASED COMPENSATION (Stock Option Activity) (Details) - Stock Options - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Options
Beginning balance (in shares)	2,772	3,323	4,083
Options granted (in shares)	94	158	132
Options modified (in shares)		0	18
Options exercised (in shares)	(536)	(700)	(899)
Options forfeited/cancelled (in shares)	(12)	(9)	(11)
Ending balance (in shares)	2,318	2,772	3,323
Options vested and exercisable at period end (in shares)	2,018
Options expected to vest at period end (in shares)	284
Weighted Average Exercise Price
Options outstanding at beginning of period (in dollars per share)	$ 61.71	$ 50.85	$ 44.54
Options granted (in dollars per share)	410.03	187.76	169.13
Options modified (in dollars per share)		0	163.55
Options exercised (in dollars per share)	49.13	37.79	41.21
Options forfeited/cancelled (in dollars per share)	248.74	119.30	97.83
Options outstanding at end of period (in dollars per share)	77.79	$ 61.71	$ 50.85
Options vested and exercisable at period end (in dollars per share)	53.27
Options expected to vest at period end (in dollars per share)	$ 240.03
Aggregate Intrinsic Value
Options outstanding, beginning of period	$ 822,152	$ 536,015	$ 291,846
Options outstanding, end of period	1,369,132	$ 822,152	$ 536,015
Options vested and exercisable as of December 31, 2021	1,241,261
Options expected to vest as of December 31, 2021	$ 121,544
Weighted Average Remaining Contractual Term (in years)
Options outstanding as of December 31, 2021	3 years 8 months 12 days
Options vested and exercisable as of December 31, 2021	3 years
Options expected to vest as of December 31, 2021	8 years 1 month 6 days