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STOCK PLANS (Summary of Stock Options by Exercise Price Range) (Details) - Stock options	12 Months Ended
	Dec. 31, 2017 $ / shares shares
Information about awards outstanding
Weighted Average Remaining Life (in years)	6 years 2 months 12 days
Outstanding
Options Outstanding, Number of Stock Options (in shares) | shares	1,362,448
Exercisable
Options Exercisable, Number of Stock Options (in shares) | shares	952,889
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	5 years 2 months 12 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 10 months 25 days
Outstanding
Options Outstanding, Number of Stock Options (in shares) | shares	508,257
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 38.79
Exercisable
Options Exercisable, Number of Stock Options (in shares) | shares	508,257
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 38.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	3 years 10 months 25 days
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)	8 years 1 month 6 days
Outstanding
Options Outstanding, Number of Stock Options (in shares) | shares	224,894
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 58.11
Exercisable
Options Exercisable, Number of Stock Options (in shares) | shares	75,615
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 58.07
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	8 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 3 months 19 days
Outstanding
Options Outstanding, Number of Stock Options (in shares) | shares	629,297
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 74.45
Exercisable
Options Exercisable, Number of Stock Options (in shares) | shares	369,017
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 70.43
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	6 years 6 months

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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