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					Nine Months Ended
	September 30,					September 30,
	2018		2017			2018		2017
Numerator:
Net income (loss) used for calculating basic and diluted income (loss) per common share	$	11,753	$	(48,180	)	$	38,436	$	(104,028	)

Denominator:
Weighted average common shares used in the calculation of basic income (loss) per share	90,854		90,624			90,969		87,585
Common stock equivalents associated with stock-based compensation plans (1), (2)	1,294		—			1,275		—
Shares used in the calculation of diluted income (loss) per share	92,148		90,624			92,244		87,585

Basic income (loss) per share	$	0.13	$	(0.53	)	$	0.42	$	(1.19	)
Diluted income (loss) per share	$	0.13	$	(0.53	)	$	0.42	$	(1.19	)


(1)	For the three and nine months ended September 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 0.2 million for both periods.


(2)	For the three and nine months ended September 30, 2017, approximately 1.4 million common stock equivalents were excluded from the calculation of diluted income (loss) per share because the effect would have been anti-dilutive.