Net Earnings (Loss) Per Share (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings (loss) per share:    
Net (loss) income $ (4.9) $ 0.4
Preferred stock dividends (1.0) (1.0)
Net income less preferred stock dividends $ (5.9) $ (0.6)
Basic weighted average number of common shares outstanding 72.4 75.0
Diluted weighted average number of common shares outstanding 72.4 75.0
Earnings (loss) per share:    
Basic (in dollars per share) $ (0.08) $ (0.01)
Diluted (in dollars per share) $ (0.08) $ (0.01)
Number of options and non-vested restricted stock awards assumed to be repurchased under the treasury stock method 2.8 2.9
Convertible Preferred Stock    
Earnings (loss) per share:    
Securities excluded in the computation of diluted income per share (in shares) 3.1 3.1