Operating Results of Segments and Reconciliations to Loss Before Income taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 337.1	$ 309.4
Unrealized losses on derivative financial instruments	(0.3)	(0.4)
Segment depreciation and amortization	(11.5)	(14.7)
Selling, general and administrative expenses	(14.4)	(15.4)
Other, net	(1.0)	(1.4)
Operating loss	(3.6)	(2.1)
Interest expense, net	(11.0)	(9.2)
Change in fair value of common stock warrant liability	2.5	(0.6)
Foreign exchange gains on intercompany loans	0.8	2.6
Income from equity method investment	1.1	0.0
Other nonoperating expense, net	(0.3)	0.0
Income tax expense	(0.8)	(0.7)
Earnings (loss) from discontinued operations, net of income taxes	0.0	0.0
Net loss	(11.3)	(10.0)	$ (102.6)
Operating Segments
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	12.3	18.3
Unrealized losses on derivative financial instruments	(0.2)	(0.4)
Segment depreciation and amortization	(11.5)	(14.7)
Amortization of inventories and supplies purchase accounting adjustments	0.0	(0.6)
RANA | Operating Segments
Segment Reporting Information [Line Items]
Revenues	225.6	200.8
Segment Adjusted EBITDA	6.3	13.2
RAEU | Operating Segments
Segment Reporting Information [Line Items]
Revenues	111.5	108.6
Segment Adjusted EBITDA	6.0	5.1
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	0.0	0.0
Segment Adjusted EBITDA	0.0	0.0
Selling, general and administrative expenses	$ (3.2)	$ (3.3)