STOCK PLANS (Summary of Stock Options by Exercise Price Range) (Details) - Stock options	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Information about awards outstanding
Weighted Average Remaining Life (in years)	5 years 9 months 18 days
Outstanding
Options Outstanding, Number of Stock Options (in shares) | shares	1,431,038
Exercisable
Options Exercisable, Number of Stock Options (in shares) | shares	1,070,594
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	4 years 10 months 25 days
Exercise Price Range 1
Information about awards outstanding
Exercise price, high end of range (in dollars per share)	$ 49.99
Weighted Average Remaining Life (in years)	3 years
Outstanding
Options Outstanding, Number of Stock Options (in shares) | shares	447,315
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 39.78
Exercisable
Options Exercisable, Number of Stock Options (in shares) | shares	447,315
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 39.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	3 years
Exercise Price Range 2
Information about awards outstanding
Exercise price, low end of range (in dollars per share)	$ 50.00
Exercise price, high end of range (in dollars per share)	$ 59.99
Weighted Average Remaining Life (in years)	7 years 1 month 6 days
Outstanding
Options Outstanding, Number of Stock Options (in shares) | shares	217,143
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 58.12
Exercisable
Options Exercisable, Number of Stock Options (in shares) | shares	144,768
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 58.11
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	7 years 1 month 6 days
Exercise Price Range 3
Information about awards outstanding
Exercise price, low end of range (in dollars per share)	$ 60.00
Weighted Average Remaining Life (in years)	7 years
Outstanding
Options Outstanding, Number of Stock Options (in shares) | shares	766,580
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 78.28
Exercisable
Options Exercisable, Number of Stock Options (in shares) | shares	478,511
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 72.09
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	5 years 10 months 25 days