STOCK-BASED COMPENSATION (Summary of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year (in shares) | shares	1,448
Granted (in shares) | shares	203
Exercised (in shares) | shares	(350)
Forfeited or Expired (in shares) | shares	(17)
Outstanding at end of year (in shares) | shares	1,284
Vested or expected to vest at end of year (in shares) | shares	1,284
Exercisable at end of year (in shares) | shares	961
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Outstanding at beginning of year (in dollars per share) | $ / shares	$ 27.91
Weighted Average Exercise Price, Granted (in dollars per share) | $ / shares	55.91
Weighted Average Exercise Price, Exercised (in dollars per share) | $ / shares	17.83
Weighted Average Exercise Price, Forfeited or Expired (in dollars per share) | $ / shares	46.52
Weighted Average Exercise Price, Outstanding at end of year (in dollars per share) | $ / shares	34.83
Weighted Average Exercise Price, Vested or expected to vest at end of year (in dollars per share) | $ / shares	34.83
Weighted Average Exercise Price, Exercisable at end of year (in dollars per share) | $ / shares	$ 28.49
Weighted Average Contractual Term in Years, Outstanding at end of year	4 years 10 days
Weighted Average Contractual Term in Years, Vested or expected to vest at end of year	4 years 10 days
Weighted Average Contractual Term in Years, Exercisable at end of year	3 years 1 month 24 days
Aggregate Intrinsic Value, Outstanding at end of year | $	$ 30,128
Aggregate Intrinsic Value, Vested or expected to vest at end of year | $	30,128
Aggregate Intrinsic Value, Exercisable at end of year | $	$ 28,639