Computation of Net Income (Loss) per Share

Basic earnings per share (“EPS”) is computed by dividing net income (loss) by the weighted average number of shares of Common Stock outstanding for the period. Diluted EPS reflects the potential dilution of securities that could share in earnings. When the impact of common share equivalents is anti-dilutive, they are excluded from the calculation.

The following table sets forth the calculation of basic and diluted income (loss) per share (in thousands, except per share data):



	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2018		2017			2018		2017
Numerator:
Net income (loss) used for calculating basic and diluted income (loss) per common share	$	46,270	$	(92,281	)	$	26,683	$	(55,848	)

Denominator:
Weighted average common shares used in the calculation of basic income (loss) per share	91,048		89,297			91,026		86,066
Common stock equivalents associated with stock-based compensation plans (1), (2)	1,108		—			1,226		—
Shares used in the calculation of diluted income (loss) per share	92,156		89,297			92,252		86,066

Basic income (loss) per share	$	0.51	$	(1.03	)	$	0.29	$	(0.65	)
Diluted income (loss) per share	$	0.50	$	(1.03	)	$	0.29	$	(0.65	)


(1)	For the three and six months ended June 30, 2018, certain common stock equivalents were not included in the computation of diluted income (loss) per share because the effect would have been anti-dilutive. These common share equivalents totaled less than 0.4 million for both periods.


(2)	For the three and six months ended June 30, 2017, approximately 1.3 million common stock equivalents were excluded from the calculation of diluted income (loss) per share because the effect would have been anti-dilutive.