LOSS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income (loss)	$ 0.5	$ (17.3)	$ (6.4)	$ (9.3)	$ (16.8)	$ (15.7)
Net loss attributable to common stockholders	$ (0.8)		$ (7.7)		$ (19.3)	$ (18.2)
Denominator:
Weighted-average shares outstanding	64,200,000		64,500,000		64,600,000	64,500,000
Denominator for basic and diluted EPS - weighted-average shares	64,173,164		64,523,163		64,625,347	64,496,550
Basic and diluted loss per share (in dollars per share)	$ (0.01)		$ (0.12)		$ (0.30)	$ (0.28)
Series A
Numerator:
Less Series A preferred dividends	$ (1.3)		$ (1.3)		$ (2.5)	$ (2.5)