Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic and dilutive net income (loss) available to common shareholders	$ 26.0	$ (4.9)	$ 4.4	$ (93.2)
Basic weighted average shares outstanding (in shares)	31,929,000	30,612,000	31,367,000	26,501,000
Dilutive weighted average shares outstanding (in shares)	32,582,000	30,612,000	32,562,000	26,501,000
Earnings (Loss) Per Share – Basic (in dollars per share)	$ 0.81	$ (0.16)	$ 0.14	$ (3.52)
Loss Per Share – Diluted (in dollars per share)	$ 0.80	$ (0.16)	$ 0.13	$ (3.52)
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive securities (in shares)	653,000	0	711,000	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			237	671
Anti-dilutive Series A Convertible Note Conversion Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share			0	2,612
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	0	484,000	0
Anti-dilutive securities excluded from computation of earnings per share			0	981