Computation of Net (Loss) Income per Share (Tables)

3 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of basic and diluted (loss) earnings per share calculations

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

	Three Months Ended
	March 31,
	2018			2017
Numerator:
Net (loss) income used for calculating basic and diluted (loss) income per common share	$	(19,587	)	$	36,433
Denominator:
Weighted average common shares used in the calculation of basic (loss) income per share	91,005			82,835
Common stock equivalents associated with stock-based compensation plans (1), (2)	—			1,260
Shares used in the calculation of diluted (loss) income per share	91,005			84,095
Basic (loss) income per share	$	(0.22	)	$	0.44
Diluted (loss) income per share	$	(0.22	)	$	0.43

(1) For the three months ended March 31, 2017, certain common stock equivalents were not included in the computation of diluted income per share because the effect would have been anti-dilutive. These common share equivalents totaled less than 0.4 million for the 2017 period presented.

(2) For the three months ended March 31, 2018, approximately 1.3 million common stock equivalents were completely excluded from the calculation of diluted (loss) per share because they were anti-dilutive.