STOCK-BASED COMPENSATION (Details 2)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Options outstanding and exercisable by price range
Options Outstanding, Number (in shares) | shares	793,173
Options Exercisable, Number (in shares) | shares	469,844
Range of exercise price per share from $60.97 and $85.32
Options outstanding and exercisable by price range
Exercise price range, low end of range (in dollars per share)	$ 60.97
Exercise price range, high end of range (in dollars per share)	$ 85.32
Options Outstanding, Number (in shares) | shares	347,914
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 21 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 100.47
Options Exercisable, Number (in shares) | shares	162,533
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 95.93
Range of exercise price per share from $104.47 and $110.33
Options outstanding and exercisable by price range
Exercise price range, low end of range (in dollars per share)	104.47
Exercise price range, high end of range (in dollars per share)	$ 110.33
Options Outstanding, Number (in shares) | shares	147,717
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 11 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 132.17
Options Exercisable, Number (in shares) | shares	94,517
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 132.44
Range of exercise price per share from $120.91 to $151.45
Options outstanding and exercisable by price range
Exercise price range, low end of range (in dollars per share)	120.91
Exercise price range, high end of range (in dollars per share)	$ 151.45
Options Outstanding, Number (in shares) | shares	297,542
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 4 months 9 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 144.18
Options Exercisable, Number (in shares) | shares	212,794
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 141.15