INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Apr. 30, 2017
Income Tax Disclosure [Abstract]
Expected net refund in future period					$ 6.2
Reduction in unrecognized tax benefits	$ 4.9		$ 4.9
Effective tax rate (as a percent)	25.50%	29.90%	30.60%	32.30%