Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic net income (loss) available to common shareholders	$ 19.8	$ 1.2	$ 24.2	$ (92.0)
Dilutive Securities, Effect on Basic Earnings Per Share	0.0	(2.0)	0.0	0.0
Net Income (Loss) Available to Common Stockholders, Diluted	$ 19.8	$ (0.8)	$ 24.2	$ (92.0)
Basic weighted average shares outstanding (in shares)	32,065,000	30,639,000	31,602,000	27,896,000
Dilutive weighted average shares outstanding (in shares)	32,621,000	31,903,000	32,569,000	27,896,000
Earnings (Loss) Per Share – Basic (in dollars per share)	$ 0.62	$ 0.04	$ 0.76	$ (3.30)
Loss Per Share – Diluted (in dollars per share)	$ 0.61	$ (0.03)	$ 0.74	$ (3.30)
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive securities (in shares)	556,000	282,000	646,000	0
Anti-dilutive options and shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share			264	358
Anti-dilutive Series B Convertible Note Conversion Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive securities (in shares)	0	982,000	321,000	0
Anti-dilutive securities excluded from computation of earnings per share			0	981