NET LOSS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Share

	For the Year Ended December 31,
	2014			2013			2012
	(in thousands, except for per share amounts)
Net loss	$	(135,789	)	$	(111,985	)	$	(121,287	)
Weighted-average number of shares of common stock and common stock equivalents outstanding:
Weighted-average number of common stock outstanding for computing basic net loss per share		40,026			33,850			23,602
Dilutive effect of outstanding warrants and stock awards after application of the treasury stock method*		—			—			—
Weighted-average number of common stock outstanding for computing diluted net loss per share		40,026			33,850			23,602
Net loss per share—basic and diluted	$	(3.39	)	$	(3.31	)	$	(5.14	)

* Warrants, stock options, restricted stock units and stock appreciation rights to purchase approximately 5,386,203, 5,158,382 and 5,858,000 shares of common stock as of December 31, 2014, 2013 and 2012, respectively, were excluded from the net loss per share calculation as their effect would have been anti-dilutive.