BASIC AND DILUTED EARNINGS PER COMMON SHARE - Components of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Numerator:
Loss from continuing operations, net of taxes	$ (10.7)	$ (32.8)	[1]	$ (223.8)	$ (107.6)	[1]
(Loss) income from discontinued operations, net of taxes	(0.4)	0.4	[1]	(0.1)	1.3	[1]
Net loss	$ (11.1)	$ (32.4)	[1]	$ (223.9)	$ (106.3)	[1]
Denominator:
Weighted average common shares outstanding - Basic (shares)	52,834,879	52,615,412	[1]	52,777,883	52,584,954	[1]
Effect of dilutive restricted stock (shares)	0	0		0	0
Weighted average common shares outstanding - Diluted (shares)	52,834,879	52,615,412	[1]	52,777,883	52,584,954	[1]
Basic (loss) earnings per common share:
Continuing operations (usd per share)	$ (0.20)	$ (0.62)	[1]	$ (4.24)	$ (2.04)	[1]
Discontinued operations (usd per share)	(0.01)	0.01	[1]	0.00	0.02	[1]
Net (loss) income (usd per share)	(0.21)	(0.61)	[1]	(4.24)	(2.02)	[1]
Diluted (loss) earnings per common share:
Continuing operations (usd per share)	(0.20)	(0.62)	[1]	(4.24)	(2.04)	[1]
Discontinued operations (usd per share)	(0.01)	0.01	[1]	0.00	0.02	[1]
Net (loss) income (usd per share)	$ (0.21)	$ (0.61)	[1]	$ (4.24)	$ (2.02)	[1]
Restricted Stock
Diluted (loss) earnings per common share:
Unvested restricted stock awards under the Stock Plan (shares)	197,667	19,506		165,961	19,486

[1] Adjusted as a result of the adoption of certain accounting pronouncements during 2018. See Note 1, "Description of Business and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements," for details of these adjustments.