NET LOSS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Share

Given that the Company recorded 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 are, therefore, excluded from the diluted net loss per share calculation.

	For the Year Ended December 31,
	2016			2015			2014
	(in thousands, except per share amounts)
Net loss		(267,265	)	$	(220,030	)	$	(135,789	)
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		48,697			42,290			40,026
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		48,697			42,290			40,026
Net loss per share — basic and diluted	$	(5.49	)	$	(5.20	)	$	(3.39	)

* For the year ended December 31, 2016 and 2015, stock options, RSAs and SARs to purchase approximately 5.7 million and 6.8 million shares of common stock, respectively, were excluded from the net loss per share calculation as their effect would have been anti-dilutive.

For the year ended 2014, stock options, RSAs, RSUs, SARs and warrants to purchase approximately 5.4 million shares of common stock were excluded from the net loss per share calculation as their effect would have been anti-dilutive.