Income (Loss) Per Share of Common Stock (Tables)

3 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Summary of Reconciliation of Numerator and Denominator Used to Calculate Basic and Diluted Loss Per Share of Common Stock

A reconciliation of the numerator and denominator used to calculate basic and diluted income (loss) per share of common stock (“EPS”) is presented in the following table:

	Three months ended March 31,			Three months ended February 28,			One month ended December 31,
	2016			2015			2015
				As Restated
	(In millions, except per share amounts)
Numerator:
Income (loss) from continuing operations	$	5.2		$	(3.5	)	$	7.0
(Loss) income from discontinued operations, net of income taxes	(0.1		)	0.2			—
Net income (loss)	5.1			(3.3		)	7.0
Income allocated to participating securities	(0.1		)	—			(0.2		)
Net income (loss) for basic earnings per share	5.0			(3.3		)	6.8
Interest on convertible subordinated debentures	—			—			0.3
Net income (loss) for diluted earnings per share	$	5.0		$	(3.3	)	$	7.1
Denominator:
Basic weighted average shares	63.0			58.9			62.9
Effect of:
4 1/16% Convertible Subordinated Debentures (“4 1/16% Debentures”)	—			—			9.4
Employee stock options and stock purchase plan	—			—			0.2
Diluted weighted average shares	63.0			58.9			72.5
Basic
Income (loss) from continuing operations	$	0.08		$	(0.06	)	$	0.11
(Loss) income from discontinued operations, net of income taxes	—			—			—
Net income (loss)	$	0.08		$	(0.06	)	$	0.11
Diluted
Income (loss) from continuing operations	$	0.08		$	(0.06	)	$	0.10
(Loss) income from discontinued operations, net of income taxes	—			—			—
Net income (loss)	$	0.08		$	(0.06	)	$	0.10

Schedule of Potentially Dilutive Securities Excluded from Computation

The following table sets forth the potentially dilutive securities excluded from the computation because their effect would have been anti-dilutive:

	Three months ended March 31,	Three months ended February 28,	One month ended December 31,
	2016	2015	2015
	(In millions)
4 1/16% Debentures	9.4	12.9	—
Employee stock options and stock purchase plan	0.1	0.2	—
Unvested restricted shares	1.3	1.8	—
Total potentially dilutive securities	10.8	14.9	—