Income from Continuing Operations Per Unrestricted Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income (Loss) from Continuing Operations Attributable to Parent	$ (2.2)	$ 13.5
Income from Continuing Operations	(2.2)	13.5
Dilutive Effect on Income of Equity-based Compensation Equivalent Shares	0.0	0.0
Diluted Income from Continuning Operations Attributed to Unrestricted Shares	$ (2.0)	$ 13.6
Weighted-Average Unrestricted Shares Outstanding	51,191,500	51,872,800
Equity-based Compensation Equivalent Shares	0	96,500
Weighted-Average Unrestricted Shares and Equivalent Shares Outstanding Assuming Dilution	51,191,500	51,969,300
Basic Income from Continuing Operations Per Unrestricted Share (in dollars per share)	$ (0.04)	$ 0.26
Diluted Income from Continuing Operations Per Untrestriced Share (in dollars per share)	$ (0.04)	$ 0.26
Unrestricted Shares [Member]
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income (Loss) from Continuing Operations Attributable to Parent	$ (2.0)	$ 13.6
Participating Awards [Member]
Schedule of Basic and Diluted Earnings Per Share [Line Items]
Income (Loss) from Continuing Operations Attributable to Parent	$ (0.2)	$ (0.1)