Net Income (Loss) per Common Share - Schedule of Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net income from continuing operations	$ 8.3	$ 10.0
Less: Distributed net income available to participating securities	(0.3)	0.0
Undistributed and distributed net income available to common shareholders	$ 8.0	$ 10.0
Weighted average shares outstanding for basic net income per share (shares)	37.7	37.4
Effect of dilutive securities (shares)	0.2	0.5
Weighted average shares outstanding for diluted net income per share (shares)	37.9	37.9
Net income per share from continuing operations, basic (USD per share)	$ 0.21	$ 0.27
Net income per share from continuing operations, diluted (USD per share)	$ 0.21	$ 0.26
Net loss from discontinued operations	$ (0.1)	$ (0.3)
Net income per share from discontinued operations, basic (USD per share)	$ 0.00	$ (0.01)
Net income per share from discontinued operations, diluted (USD per share)	0.00	(0.01)
Net income per share - Basic (in dollars per share)	0.21	0.26
Net income per share - Diluted (in dollars per share)	$ 0.21	$ 0.25
Potentially dilutive securities (shares)	0.7	0.2