STOCK-BASED COMPENSATION (Summary Of Stock Option Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year (in shares) | shares	2,386
Granted (in shares) | shares	276
Exercised (in shares) | shares	(566)
Forfeited or Expired (in shares) | shares	(13)
Outstanding at end of year (in shares) | shares	2,083
Vested or expected to vest at end of year (in shares) | shares	2,083
Exercisable at end of year (in shares) | shares	1,658
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	$ 18.55
Weighted Average Exercise Price, Granted (in dollars per share) | $ / shares	33.69
Weighted Average Exercise Price, Exercised (in dollars per share) | $ / shares	17.85
Weighted Average Exercise Price, Forfeited or Expired (in dollars per share) | $ / shares	32.59
Weighted Average Exercise Price, Outstanding at end of year (in dollars per share) | $ / shares	20.65
Weighted Average Exercise Price, Vested or expected to vest at end of year (in dollars per share) | $ / shares	20.65
Weighted Average Exercise Price, Exercisable at end of year (in dollars per share) | $ / shares	$ 18.00
Weighted Average Contractual Term in Years, Outstanding at end of year	3 years 4 months 24 days
Weighted Average Contractual Term in Years, Vested or expected to vest at end of year	3 years 4 months 24 days
Weighted Average Contractual Term in Years, Exercisable at end of year	2 years 6 months 3 days
Aggregate Intrinsic Value, Outstanding at end of year | $	$ 46,340
Aggregate Intrinsic Value, Vested or expected to vest at end of year | $	46,340
Aggregate Intrinsic Value, Exercisable at end of year | $	$ 41,292