Net (Loss) Income per Share

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



	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2017			2016		2017			2016
Numerator:
Net (loss) income used for calculating basic and diluted (loss) income per common share	$	(48,180	)	$	30,484	$	(104,028	)	$	127,097

Denominator:
Weighted average number of common shares used in the calculation of basic (loss) income per share	90,624			82,638		87,585			82,549
Common stock equivalents associated with stock-based compensation plans (1), (2)	—			1,165		—			1,212
Shares used in the calculation of diluted (loss) income per share	90,624			83,803		87,585			83,761

Basic (loss) income per share	$	(0.53	)	$	0.37	$	(1.19	)	$	1.54
Diluted (loss) income per share	$	(0.53	)	$	0.36	$	(1.19	)	$	1.52


(1)	For the three and nine months ended September 30, 2016, 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 0.2 million for both 2016 periods.


(2)	Approximately 1.4 million common stock equivalents for both the three and nine months ended September 30, 2017 were completely excluded from the calculation of diluted (loss) per share because they were anti-dilutive.