STOCK-BASED COMPENSATION PLANS, Summary of Stock Options Outstanding (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Options [Abstract]
Options outstanding, shares (in shares) | shares	1,969,301
Options outstanding, weighted-average exercise price (in dollars per share)	$ 28.15
Options outstanding, weighted-average remaining life	6 years 11 days
Options exercisable, shares (in shares) | shares	1,200,830
Options exercisable, weighted-average exercise price (in dollars per share)	$ 24.79
Weighted-average remaining contractual term of outstanding stock options	6 years 11 days
Weighted-average remaining contractual term of outstanding and exercisable stock options	4 years 9 months 25 days
Aggregate intrinsic value of outstanding stock options | $	$ 23.2
Aggregate intrinsic value of exercisable stock options | $	$ 18.2
$0.00 - $18.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	$ 0
Exercise price range, upper range limit (in dollars per share)	$ 18.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	99,270
Options outstanding, weighted-average exercise price (in dollars per share)	$ 17.71
Options outstanding, weighted-average remaining life	3 years 2 months 23 days
Options exercisable, shares (in shares) | shares	99,270
Options exercisable, weighted-average exercise price (in dollars per share)	$ 17.71
$18.001 - $23.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	18.001
Exercise price range, upper range limit (in dollars per share)	$ 23.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	450,540
Options outstanding, weighted-average exercise price (in dollars per share)	$ 19.57
Options outstanding, weighted-average remaining life	2 years 9 months 11 days
Options exercisable, shares (in shares) | shares	449,926
Options exercisable, weighted-average exercise price (in dollars per share)	$ 19.57
$23.001 - $28.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	23.001
Exercise price range, upper range limit (in dollars per share)	$ 28.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	261,642
Options outstanding, weighted-average exercise price (in dollars per share)	$ 26.14
Options outstanding, weighted-average remaining life	5 years 2 months 8 days
Options exercisable, shares (in shares) | shares	223,428
Options exercisable, weighted-average exercise price (in dollars per share)	$ 25.93
$28.001 - $29.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	28.001
Exercise price range, upper range limit (in dollars per share)	$ 29.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	275,173
Options outstanding, weighted-average exercise price (in dollars per share)	$ 28.78
Options outstanding, weighted-average remaining life	6 years 2 months 19 days
Options exercisable, shares (in shares) | shares	171,759
Options exercisable, weighted-average exercise price (in dollars per share)	$ 28.78
$29.001 - $30.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	29.001
Exercise price range, upper range limit (in dollars per share)	$ 30.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	317,341
Options outstanding, weighted-average exercise price (in dollars per share)	$ 29.79
Options outstanding, weighted-average remaining life	7 years 2 months 16 days
Options exercisable, shares (in shares) | shares	145,513
Options exercisable, weighted-average exercise price (in dollars per share)	$ 29.79
$30.001 - $40.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit (in dollars per share)	30.001
Exercise price range, upper range limit (in dollars per share)	$ 40.00
Options [Abstract]
Options outstanding, shares (in shares) | shares	565,335
Options outstanding, weighted-average exercise price (in dollars per share)	$ 36.52
Options outstanding, weighted-average remaining life	8 years 8 months 23 days
Options exercisable, shares (in shares) | shares	110,934
Options exercisable, weighted-average exercise price (in dollars per share)	$ 37.30