BASIC AND DILUTED EARNINGS (LOSS) PER COMMON SHARE - Components of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Income (loss) from continuing operations, net of taxes	$ 10.6	$ (0.8)
Income (loss) from discontinued operations, net of taxes	0.4	(0.1)
Net income (loss)	$ 11.0	$ (0.9)	[1]
Denominator:
Weighted average common shares outstanding - Basic (shares)	52,482,413	52,386,223
Effect of dilutive restricted stock (shares)	167,350	0
Weighted average common shares outstanding - Diluted (shares)	52,649,763	52,386,223
Basic earnings (loss) per common share:
Continuing operations (usd per share)	$ 0.20	$ (0.02)
Discontinued operations (usd per share)	0.01	0.00
Net income (loss) (usd per share)	0.21	(0.02)
Diluted earnings (loss) per common share:
Continuing operations (usd per share)	0.20	(0.02)
Discontinued operations (usd per share)	0.01	0.00
Net income (loss) (usd per share)	$ 0.21	$ (0.02)

[1] Adjusted as a result of the adoption of certain accounting pronouncements beginning on January 1, 2016. See Note 1, "Description of Business and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements" for details of these adjustments.