NET LOSS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Share

Given that the Company generated a net loss for each of the periods presented, there is no difference between basic and diluted net loss per share since the effect of common stock equivalents would be anti-dilutive and, therefore, would be excluded from the diluted net loss per share calculation.

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2016			2015			2016			2015
	(in thousands, except per share amounts)
Net loss	$	(56,742	)	$	(51,939	)	$	(178,813	)	$	(155,349	)
Weighted-average number of shares of common    stock and common stock equivalents outstanding:
Weighted-average number of shares of common    stock outstanding for computing basic loss per share		48,254			41,565			46,709			41,416
Dilutive effect of outstanding stock    awards and stock options after application of    the treasury stock method*		—			—			—			—
Weighted-average number of shares of common    stock and dilutive common stock equivalents    outstanding for computing diluted loss per share		48,254			41,565			46,709			41,416
Net loss per share — basic and diluted	$	(1.18	)	$	(1.25	)	$	(3.83	)	$	(3.75	)

* For the three and nine months ended September 30, 2016 and 2015, stock options, RSAs and stock appreciation rights to purchase approximately 6.3 million and 7.3 million shares of common stock, respectively, were excluded from the net loss per share calculation as their effect would have been anti-dilutive.