BUSINESS ACQUISITIONS - Pro Forma Results (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Business Combinations [Abstract]
Revenue | $	$ 1,836.0
Net loss | $	$ (91.1)
Loss per share:
Basic (in dollars per share) | $ / shares	$ (1.80)
Diluted (in dollars per share) | $ / shares	$ (1.80)
Denominator for basic EPS – weighted average shares (in shares) | shares	50,718,279
Denominator for diluted EPS – weighted average shares (in shares) | shares	50,718,279